--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.swt.gtk.linux.x86/src/org/eclipse/swt/widgets/Display.d	Fri Mar 20 23:03:58 2009 +0100
@@ -0,0 +1,4244 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2008 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module org.eclipse.swt.widgets.Display;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.Cursor;
+import org.eclipse.swt.graphics.Device;
+import org.eclipse.swt.graphics.DeviceData;
+import org.eclipse.swt.graphics.Font;
+import org.eclipse.swt.graphics.GCData;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.graphics.PaletteData;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.graphics.Resource;
+import org.eclipse.swt.internal.Compatibility;
+import org.eclipse.swt.internal.Converter;
+import org.eclipse.swt.internal.Lock;
+import org.eclipse.swt.internal.LONG;
+import org.eclipse.swt.internal.gtk.OS;
+import org.eclipse.swt.widgets.Caret;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Dialog;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.EventTable;
+import org.eclipse.swt.widgets.Listener;
+import org.eclipse.swt.widgets.Menu;
+import org.eclipse.swt.widgets.Monitor;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.swt.widgets.Synchronizer;
+import org.eclipse.swt.widgets.Tray;
+import org.eclipse.swt.widgets.Widget;
+
+import tango.stdc.string;
+import java.lang.all;
+
+import tango.core.Thread;
+
+/**
+ * Instances of this class are responsible for managing the
+ * connection between SWT and the underlying operating
+ * system. Their most important function is to implement
+ * the SWT event loop in terms of the platform event model.
+ * They also provide various methods for accessing information
+ * about the operating system, and have overall control over
+ * the operating system resources which SWT allocates.
+ * <p>
+ * Applications which are built with SWT will <em>almost always</em>
+ * require only a single display. In particular, some platforms
+ * which SWT supports will not allow more than one <em>active</em>
+ * display. In other words, some platforms do not support
+ * creating a new display if one already exists that has not been
+ * sent the <code>dispose()</code> message.
+ * <p>
+ * In SWT, the thread which creates a <code>Display</code>
+ * instance is distinguished as the <em>user-interface thread</em>
+ * for that display.
+ * </p>
+ * The user-interface thread for a particular display has the
+ * following special attributes:
+ * <ul>
+ * <li>
+ * The event loop for that display must be run from the thread.
+ * </li>
+ * <li>
+ * Some SWT API methods (notably, most of the public methods in
+ * <code>Widget</code> and its subclasses), may only be called
+ * from the thread. (To support multi-threaded user-interface
+ * applications, class <code>Display</code> provides inter-thread
+ * communication methods which allow threads other than the
+ * user-interface thread to request that it perform operations
+ * on their behalf.)
+ * </li>
+ * <li>
+ * The thread is not allowed to construct other
+ * <code>Display</code>s until that display has been disposed.
+ * (Note that, this is in addition to the restriction mentioned
+ * above concerning platform support for multiple displays. Thus,
+ * the only way to have multiple simultaneously active displays,
+ * even on platforms which support it, is to have multiple threads.)
+ * </li>
+ * </ul>
+ * Enforcing these attributes allows SWT to be implemented directly
+ * on the underlying operating system's event model. This has
+ * numerous benefits including smaller footprint, better use of
+ * resources, safer memory management, clearer program logic,
+ * better performance, and fewer overall operating system threads
+ * required. The down side however, is that care must be taken
+ * (only) when constructing multi-threaded applications to use the
+ * inter-thread communication mechanisms which this class provides
+ * when required.
+ * </p><p>
+ * All SWT API methods which may only be called from the user-interface
+ * thread are distinguished in their documentation by indicating that
+ * they throw the "<code>ERROR_THREAD_INVALID_ACCESS</code>"
+ * SWT exception.
+ * </p>
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>(none)</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>Close, Dispose, Settings</dd>
+ * </dl>
+ * <p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ * </p>
+ * @see #syncExec
+ * @see #asyncExec
+ * @see #wake
+ * @see #readAndDispatch
+ * @see #sleep
+ * @see Device#dispose
+ * @see <a href="http://www.eclipse.org/swt/snippets/#display">Display snippets</a>
+ * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
+ */
+public class Display : Device {
+
+    /* Events Dispatching and Callback */
+    int gdkEventCount;
+    GdkEvent* [] gdkEvents;
+    Widget [] gdkEventWidgets;
+    int [] dispatchEvents;
+    Event [] eventQueue;
+    GPollFD[] fds;
+    int allocated_nfds;
+    bool wake_state;
+    int max_priority, timeout;
+    void*/*Callback*/ eventCallback, filterCallback;
+
+    CallbackData*[int] windowProcCallbackDatas; // to prevent GC from collect
+
+    CallbackData  filterProcCallbackData;
+    EventTable eventTable, filterTable;
+    static String APP_NAME = "SWT"; //$NON-NLS-1$
+    static const String DISPATCH_EVENT_KEY = "org.eclipse.swt.internal.gtk.dispatchEvent";
+    static const String ADD_WIDGET_KEY = "org.eclipse.swt.internal.addWidget";
+    GClosure*[] closures;
+    int [] signalIds;
+
+    /* Widget Table */
+    int [] indexTable;
+    int freeSlot;
+    GtkWidget* lastHandle;
+    Widget lastWidget;
+    Widget [] widgetTable;
+    const static int GROW_SIZE = 1024;
+    static int SWT_OBJECT_INDEX;
+    static int SWT_OBJECT_INDEX1;
+    static int SWT_OBJECT_INDEX2;
+
+    /* Modality */
+    Shell [] modalShells;
+    Dialog modalDialog;
+    static final String GET_MODAL_DIALOG = "org.eclipse.swt.internal.gtk.getModalDialog"; //$NON-NLS-1$
+    static final String SET_MODAL_DIALOG = "org.eclipse.swt.internal.gtk.setModalDialog"; //$NON-NLS-1$
+
+    /* Focus */
+    int focusEvent;
+    Control focusControl;
+    Shell activeShell;
+    bool activePending;
+    bool ignoreActivate, ignoreFocus;
+
+    /* Input method resources */
+    Control imControl;
+    GtkWindow* preeditWindow;
+    GtkLabel* preeditLabel;
+
+    /* Sync/Async Widget Communication */
+    Synchronizer synchronizer;
+    Thread thread;
+
+    /* Display Shutdown */
+    Runnable [] disposeList;
+
+    /* System Tray */
+    Tray tray;
+
+    /* Timers */
+    int [] timerIds;
+    Runnable [] timerList;
+    CallbackData timerProcCallbackData;
+
+    /* Caret */
+    Caret currentCaret;
+    int caretId;
+    CallbackData caretProcCallbackData;
+
+    /* Mnemonics */
+    Control mnemonicControl;
+
+    /* Mouse hover */
+    int mouseHoverId;
+    GtkWidget* mouseHoverHandle;
+    CallbackData mouseHoverProcCallbackData;
+
+    /* Menu position callback */
+
+    /* Tooltip size allocate callback */
+
+    /* Shell map callback */
+    CallbackData shellMapProcCallbackData;
+    GClosure* shellMapProcClosure;
+
+    /* Idle proc callback */
+    CallbackData idleProcCallbackData;
+    int idleHandle;
+    static const String ADD_IDLE_PROC_KEY = "org.eclipse.swt.internal.gtk.addIdleProc";
+    static const String REMOVE_IDLE_PROC_KEY = "org.eclipse.swt.internal.gtk.removeIdleProc";
+    Object idleLock;
+    bool idleNeeded;
+
+    /* GtkTreeView callbacks */
+    int[] treeSelection;
+    int treeSelectionLength;
+
+    /* Set direction callback */
+    CallbackData setDirectionProcCallbackData;
+    static const String GET_DIRECTION_PROC_KEY = "org.eclipse.swt.internal.gtk.getDirectionProc"; //$NON-NLS-1$
+
+    /* Set emissionProc callback */
+    CallbackData emissionProcCallbackData;
+    static const String GET_EMISSION_PROC_KEY = "org.eclipse.swt.internal.gtk.getEmissionProc"; //$NON-NLS-1$
+
+    /* Get all children callback */
+    CallbackData allChildrenProcCallbackData;
+    GList* allChildren;
+
+    CallbackData cellDataProcCallbackData;
+
+    /* Settings callbacks */
+    GtkWidget* shellHandle;
+    bool settingsChanged, runSettingsFld;
+    CallbackData styleSetProcCallbackData;
+
+    /* Entry focus behaviour */
+    bool entrySelectOnFocus;
+
+    /* Enter/Exit events */
+    Control currentControl;
+
+    /* Flush exposes */
+    int /*long*/ checkIfEventProc;
+    void*/*Callback*/ checkIfEventCallback;
+    GdkWindow* flushWindow;
+    bool flushAll;
+    GdkRectangle* flushRect;
+    XExposeEvent* exposeEvent;
+    XVisibilityEvent* visibilityEvent;
+    //int /*long*/ [] flushData = new int /*long*/ [1];
+
+    /* System Resources */
+    Font systemFont;
+    Image errorImage, infoImage, questionImage, warningImage;
+    Cursor [] cursors;
+    Resource [] resources;
+    static const int RESOURCE_SIZE = 1 + 4 + SWT.CURSOR_HAND + 1;
+
+    /* Colors */
+    GdkColor* COLOR_WIDGET_DARK_SHADOW, COLOR_WIDGET_NORMAL_SHADOW, COLOR_WIDGET_LIGHT_SHADOW;
+    GdkColor* COLOR_WIDGET_HIGHLIGHT_SHADOW, COLOR_WIDGET_BACKGROUND, COLOR_WIDGET_FOREGROUND, COLOR_WIDGET_BORDER;
+    GdkColor* COLOR_LIST_FOREGROUND, COLOR_LIST_BACKGROUND, COLOR_LIST_SELECTION, COLOR_LIST_SELECTION_TEXT;
+    GdkColor* COLOR_INFO_BACKGROUND, COLOR_INFO_FOREGROUND;
+    GdkColor* COLOR_TITLE_FOREGROUND, COLOR_TITLE_BACKGROUND, COLOR_TITLE_BACKGROUND_GRADIENT;
+    GdkColor* COLOR_TITLE_INACTIVE_FOREGROUND, COLOR_TITLE_INACTIVE_BACKGROUND, COLOR_TITLE_INACTIVE_BACKGROUND_GRADIENT;
+
+    /* Popup Menus */
+    Menu [] popups;
+
+    /* Click count*/
+    int clickCount = 1;
+
+    /* Timestamp of the Last Received Events */
+    int lastEventTime, lastUserEventTime;
+
+    /* Fixed Subclass */
+    static int /*long*/ fixed_type;
+    static int /*long*/ fixed_info_ptr;
+    static extern(C) void function(GtkWidget* handle, GtkAllocation* allocation) oldFixedSizeAllocateProc;
+
+
+    /* Renderer Subclass */
+    static int /*long*/ text_renderer_type, pixbuf_renderer_type, toggle_renderer_type;
+    static int /*long*/ text_renderer_info_ptr, pixbuf_renderer_info_ptr, toggle_renderer_info_ptr;
+
+    /* Key Mappings */
+    static const int [] [] KeyTable = [
+
+        /* Keyboard and Mouse Masks */
+        [OS.GDK_Alt_L,      SWT.ALT],
+        [OS.GDK_Alt_R,      SWT.ALT],
+        [OS.GDK_Meta_L, SWT.ALT],
+        [OS.GDK_Meta_R, SWT.ALT],
+        [OS.GDK_Shift_L,        SWT.SHIFT],
+        [OS.GDK_Shift_R,        SWT.SHIFT],
+        [OS.GDK_Control_L,  SWT.CONTROL],
+        [OS.GDK_Control_R,  SWT.CONTROL],
+//      [OS.GDK_????,       SWT.COMMAND],
+//      [OS.GDK_????,       SWT.COMMAND],
+
+        /* Non-Numeric Keypad Keys */
+        [OS.GDK_Up,                     SWT.ARROW_UP],
+        [OS.GDK_KP_Up,                  SWT.ARROW_UP],
+        [OS.GDK_Down,                   SWT.ARROW_DOWN],
+        [OS.GDK_KP_Down,            SWT.ARROW_DOWN],
+        [OS.GDK_Left,                       SWT.ARROW_LEFT],
+        [OS.GDK_KP_Left,                SWT.ARROW_LEFT],
+        [OS.GDK_Right,                  SWT.ARROW_RIGHT],
+        [OS.GDK_KP_Right,               SWT.ARROW_RIGHT],
+        [OS.GDK_Page_Up,                SWT.PAGE_UP],
+        [OS.GDK_KP_Page_Up,     SWT.PAGE_UP],
+        [OS.GDK_Page_Down,          SWT.PAGE_DOWN],
+        [OS.GDK_KP_Page_Down,   SWT.PAGE_DOWN],
+        [OS.GDK_Home,                   SWT.HOME],
+        [OS.GDK_KP_Home,            SWT.HOME],
+        [OS.GDK_End,                        SWT.END],
+        [OS.GDK_KP_End,             SWT.END],
+        [OS.GDK_Insert,                 SWT.INSERT],
+        [OS.GDK_KP_Insert,          SWT.INSERT],
+
+        /* Virtual and Ascii Keys */
+        [OS.GDK_BackSpace,      SWT.BS],
+        [OS.GDK_Return,             SWT.CR],
+        [OS.GDK_Delete,             SWT.DEL],
+        [OS.GDK_KP_Delete,      SWT.DEL],
+        [OS.GDK_Escape,         SWT.ESC],
+        [OS.GDK_Linefeed,           SWT.LF],
+        [OS.GDK_Tab,                    SWT.TAB],
+        [OS.GDK_ISO_Left_Tab,   SWT.TAB],
+
+        /* Functions Keys */
+        [OS.GDK_F1,     SWT.F1],
+        [OS.GDK_F2,     SWT.F2],
+        [OS.GDK_F3,     SWT.F3],
+        [OS.GDK_F4,     SWT.F4],
+        [OS.GDK_F5,     SWT.F5],
+        [OS.GDK_F6,     SWT.F6],
+        [OS.GDK_F7,     SWT.F7],
+        [OS.GDK_F8,     SWT.F8],
+        [OS.GDK_F9,     SWT.F9],
+        [OS.GDK_F10,        SWT.F10],
+        [OS.GDK_F11,        SWT.F11],
+        [OS.GDK_F12,        SWT.F12],
+        [OS.GDK_F13,        SWT.F13],
+        [OS.GDK_F14,        SWT.F14],
+        [OS.GDK_F15,        SWT.F15],
+
+        /* Numeric Keypad Keys */
+        [OS.GDK_KP_Multiply,        SWT.KEYPAD_MULTIPLY],
+        [OS.GDK_KP_Add,         SWT.KEYPAD_ADD],
+        [OS.GDK_KP_Enter,           SWT.KEYPAD_CR],
+        [OS.GDK_KP_Subtract,    SWT.KEYPAD_SUBTRACT],
+        [OS.GDK_KP_Decimal, SWT.KEYPAD_DECIMAL],
+        [OS.GDK_KP_Divide,      SWT.KEYPAD_DIVIDE],
+        [OS.GDK_KP_0,           SWT.KEYPAD_0],
+        [OS.GDK_KP_1,           SWT.KEYPAD_1],
+        [OS.GDK_KP_2,           SWT.KEYPAD_2],
+        [OS.GDK_KP_3,           SWT.KEYPAD_3],
+        [OS.GDK_KP_4,           SWT.KEYPAD_4],
+        [OS.GDK_KP_5,           SWT.KEYPAD_5],
+        [OS.GDK_KP_6,           SWT.KEYPAD_6],
+        [OS.GDK_KP_7,           SWT.KEYPAD_7],
+        [OS.GDK_KP_8,           SWT.KEYPAD_8],
+        [OS.GDK_KP_9,           SWT.KEYPAD_9],
+        [OS.GDK_KP_Equal,   SWT.KEYPAD_EQUAL],
+
+        /* Other keys */
+        [OS.GDK_Caps_Lock,      SWT.CAPS_LOCK],
+        [OS.GDK_Num_Lock,       SWT.NUM_LOCK],
+        [OS.GDK_Scroll_Lock,        SWT.SCROLL_LOCK],
+        [OS.GDK_Pause,              SWT.PAUSE],
+        [OS.GDK_Break,              SWT.BREAK],
+        [OS.GDK_Print,                  SWT.PRINT_SCREEN],
+        [OS.GDK_Help,                   SWT.HELP],
+
+    ];
+
+    /* Multiple Displays. */
+    static Display Default;
+    static Display [] Displays;
+
+    /* Package name */
+    static const String PACKAGE_PREFIX = "org.eclipse.swt.widgets.";
+    /* This code is intentionally commented.
+     * ".class" can not be used on CLDC.
+     */
+//  static {
+//      String name = Display.class.getName ();
+//      int index = name.lastIndexOf ('.');
+//      PACKAGE_NAME = name.substring (0, index + 1);
+//  }
+
+    static this() {
+        Displays = new Display [4];
+        initDeviceFinder();
+        SWT_OBJECT_INDEX = OS.g_quark_from_string ("SWT_OBJECT_INDEX");
+        SWT_OBJECT_INDEX1 = OS.g_quark_from_string ("SWT_OBJECT_INDEX1");
+        SWT_OBJECT_INDEX2 = OS.g_quark_from_string ("SWT_OBJECT_INDEX2");
+    }
+
+    /* GTK Version */
+    static const int MAJOR = 2;
+    static const int MINOR = 0;
+    static const int MICRO = 6;
+
+    /* Display Data */
+    Object data;
+    String [] keys;
+    Object [] values;
+
+    /* Initial Guesses for Shell Trimmings. */
+    int borderTrimWidth = 4, borderTrimHeight = 4;
+    int resizeTrimWidth = 6, resizeTrimHeight = 6;
+    int titleBorderTrimWidth = 5, titleBorderTrimHeight = 28;
+    int titleResizeTrimWidth = 6, titleResizeTrimHeight = 29;
+    int titleTrimWidth = 0, titleTrimHeight = 23;
+    bool ignoreTrim;
+
+    /* Window Manager */
+    String windowManager;
+
+    /*
+    * TEMPORARY CODE.  Install the runnable that
+    * gets the current display. This code will
+    * be removed in the future.
+    */
+    private static void initDeviceFinder(){
+        DeviceFinder = new class() Runnable {
+            public void run () {
+                Device device = getCurrent ();
+                if (device is null) {
+                    device = getDefault ();
+                }
+                setDevice (device);
+            }
+        };
+    }
+
+/*
+* TEMPORARY CODE.
+*/
+static void setDevice (Device device) {
+    CurrentDevice = device;
+}
+
+/**
+ * Constructs a new instance of this class.
+ * <p>
+ * Note: The resulting display is marked as the <em>current</em>
+ * display. If this is the first display which has been
+ * constructed since the application started, it is also
+ * marked as the <em>default</em> display.
+ * </p>
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if called from a thread that already created an existing display</li>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ *
+ * @see #getCurrent
+ * @see #getDefault
+ * @see Widget#checkSubclass
+ * @see Shell
+ */
+public this () {
+    this (null);
+}
+
+/**
+ * Constructs a new instance of this class using the parameter.
+ *
+ * @param data the device data
+ */
+public this (DeviceData data) {
+    super (data);
+    synchronizer = new Synchronizer (this);
+    idleLock = new Object();
+    flushRect = new GdkRectangle ();
+    exposeEvent = new XExposeEvent ();
+    visibilityEvent = new XVisibilityEvent ();
+    cursors = new Cursor [SWT.CURSOR_HAND + 1];
+}
+
+/**
+ * Adds the listener to the collection of listeners who will
+ * be notified when an event of the given type occurs anywhere
+ * in a widget. The event type is one of the event constants
+ * defined in class <code>SWT</code>. When the event does occur,
+ * the listener is notified by sending it the <code>handleEvent()</code>
+ * message.
+ * <p>
+ * Setting the type of an event to <code>SWT.None</code> from
+ * within the <code>handleEvent()</code> method can be used to
+ * change the event type and stop subsequent Java listeners
+ * from running. Because event filters run before other listeners,
+ * event filters can both block other listeners and set arbitrary
+ * fields within an event. For this reason, event filters are both
+ * powerful and dangerous. They should generally be avoided for
+ * performance, debugging and code maintenance reasons.
+ * </p>
+ *
+ * @param eventType the type of event to listen for
+ * @param listener the listener which should be notified when the event occurs
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see Listener
+ * @see SWT
+ * @see #removeFilter
+ * @see #removeListener
+ *
+ * @since 3.0
+ */
+public void addFilter (int eventType, Listener listener) {
+    checkDevice ();
+    if (listener is null) error (SWT.ERROR_NULL_ARGUMENT);
+    if (filterTable is null) filterTable = new EventTable ();
+    filterTable.hook (eventType, listener);
+}
+
+void addGdkEvent (GdkEvent* event) {
+    if (gdkEvents is null) {
+        int length = GROW_SIZE;
+        gdkEvents.length = length;
+        gdkEventWidgets.length = length;
+        gdkEventCount = 0;
+    }
+    if (gdkEventCount is gdkEvents.length) {
+        int length = gdkEventCount + GROW_SIZE;
+        GdkEvent* [] newEvents = new GdkEvent* [length];
+        SimpleType!(GdkEvent*).arraycopy (gdkEvents, 0, newEvents, 0, gdkEventCount);
+        gdkEvents = newEvents;
+        Widget [] newWidgets = new Widget [length];
+        System.arraycopy (gdkEventWidgets, 0, newWidgets, 0, gdkEventCount);
+        gdkEventWidgets = newWidgets;
+    }
+    Widget widget = null;
+    GtkWidget* handle = OS.gtk_get_event_widget (event);
+    if (handle !is null) {
+        do {
+            widget = getWidget (handle);
+        } while (widget is null && (handle = OS.gtk_widget_get_parent (handle)) !is null);
+    }
+    gdkEvents [gdkEventCount] = event;
+    gdkEventWidgets [gdkEventCount] = widget;
+    gdkEventCount++;
+}
+
+void addIdleProc() {
+    synchronized (idleLock){
+        this.idleNeeded = true;
+        if (idleHandle is 0) {
+            idleProcCallbackData.display = this;
+            idleProcCallbackData.data = null;
+            idleHandle = OS.g_idle_add ( &idleProcFunc, &idleProcCallbackData );
+        }
+    }
+}
+
+/**
+ * Adds the listener to the collection of listeners who will
+ * be notified when an event of the given type occurs. The event
+ * type is one of the event constants defined in class <code>SWT</code>.
+ * When the event does occur in the display, the listener is notified by
+ * sending it the <code>handleEvent()</code> message.
+ *
+ * @param eventType the type of event to listen for
+ * @param listener the listener which should be notified when the event occurs
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see Listener
+ * @see SWT
+ * @see #removeListener
+ *
+ * @since 2.0
+ */
+public void addListener (int eventType, Listener listener) {
+    checkDevice ();
+    if (listener is null) error (SWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) eventTable = new EventTable ();
+    eventTable.hook (eventType, listener);
+}
+
+void allChildrenCollect( GtkWidget* widget, int recurse ){
+    allChildrenProcCallbackData.display = this;
+    allChildrenProcCallbackData.data = cast(void*)recurse;
+    OS.gtk_container_forall (cast(GtkContainer*)widget, cast(GtkCallback)&allChildrenProcFunc, &allChildrenProcCallbackData);
+}
+private static extern(C) int /*long*/ allChildrenProcFunc (GtkWidget* handle, void* user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    CallbackData* cbdata = cast(CallbackData*)user_data;
+    return cbdata.display.allChildrenProc( cast(GtkWidget*)handle, cast(int)cbdata.data );
+}
+int /*long*/ allChildrenProc (GtkWidget* widget, int /*long*/ recurse) {
+    allChildren = OS.g_list_append (allChildren, widget);
+    if (recurse !is 0 && OS.GTK_IS_CONTAINER (cast(GTypeInstance*)widget)) {
+        allChildrenProcCallbackData.display = this;
+        allChildrenProcCallbackData.data = cast(void*)recurse;
+        OS.gtk_container_forall (cast(GtkContainer*)widget, cast(GtkCallback)&allChildrenProcFunc, &allChildrenProcCallbackData);
+    }
+    return 0;
+}
+
+void addMouseHoverTimeout (GtkWidget* handle) {
+    if (mouseHoverId !is 0) OS.gtk_timeout_remove (mouseHoverId);
+    mouseHoverProcCallbackData.display = this;
+    mouseHoverProcCallbackData.data = cast(void*)handle;
+    mouseHoverId = OS.gtk_timeout_add (400, &mouseHoverProcFunc, &mouseHoverProcCallbackData);
+    mouseHoverHandle = handle;
+}
+
+void addPopup (Menu menu) {
+    if (popups is null) popups = new Menu [4];
+    int length = popups.length;
+    for (int i=0; i<length; i++) {
+        if (popups [i] is menu) return;
+    }
+    int index = 0;
+    while (index < length) {
+        if (popups [index] is null) break;
+        index++;
+    }
+    if (index is length) {
+        Menu [] newPopups = new Menu [length + 4];
+        System.arraycopy (popups, 0, newPopups, 0, length);
+        popups = newPopups;
+    }
+    popups [index] = menu;
+}
+
+void addWidget (GtkWidget* handle, Widget widget) {
+    if (handle is null) return;
+    if (freeSlot is -1) {
+        int len = (freeSlot = indexTable.length) + GROW_SIZE;
+        int[] newIndexTable = new int[len];
+        Widget[] newWidgetTable = new Widget [len];
+        System.arraycopy (indexTable, 0, newIndexTable, 0, freeSlot);
+        System.arraycopy (widgetTable, 0, newWidgetTable, 0, freeSlot);
+        for (int i = freeSlot; i < len - 1; i++) {
+            newIndexTable[i] = i + 1;
+        }
+        newIndexTable[len - 1] = -1;
+        indexTable = newIndexTable;
+        widgetTable = newWidgetTable;
+    }
+    int index = freeSlot + 1;
+    OS.g_object_set_qdata (cast(GObject*)handle, SWT_OBJECT_INDEX, cast(void*)index);
+    int oldSlot = freeSlot;
+    freeSlot = indexTable[oldSlot];
+    indexTable [oldSlot] = -2;
+    widgetTable [oldSlot] = widget;
+}
+
+/**
+ * Causes the <code>run()</code> method of the runnable to
+ * be invoked by the user-interface thread at the next
+ * reasonable opportunity. The caller of this method continues
+ * to run in parallel, and is not notified when the
+ * runnable has completed.  Specifying <code>null</code> as the
+ * runnable simply wakes the user-interface thread when run.
+ * <p>
+ * Note that at the time the runnable is invoked, widgets
+ * that have the receiver as their display may have been
+ * disposed. Therefore, it is necessary to check for this
+ * case inside the runnable before accessing the widget.
+ * </p>
+ *
+ * @param runnable code to run on the user-interface thread or <code>null</code>
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #syncExec
+ */
+public void asyncExec (Runnable runnable) {
+    synchronized (Device.classinfo) {
+        if (isDisposed ()) error (SWT.ERROR_DEVICE_DISPOSED);
+        synchronized (idleLock) {
+            if (idleNeeded && idleHandle is 0) {
+                //NOTE: calling unlocked function in OS
+                idleHandle = OS.g_idle_add (&idleProcFunc, cast(void*) this);
+            }
+        }
+        synchronizer.asyncExec (runnable);
+    }
+}
+
+/**
+ * Causes the system hardware to emit a short sound
+ * (if it supports this capability).
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void beep () {
+    if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
+    OS.gdk_beep();
+    if (!OS.GDK_WINDOWING_X11 ()) {
+        OS.gdk_flush ();
+    } else {
+        void* xDisplay = OS.GDK_DISPLAY ();
+        OS.XFlush (xDisplay);
+    }
+}
+
+void doCellDataProc( GtkWidget* widget, GtkTreeViewColumn *tree_column, GtkCellRenderer *cell_renderer ){
+    cellDataProcCallbackData.display = this;
+    cellDataProcCallbackData.data = widget;
+    OS.gtk_tree_view_column_set_cell_data_func ( tree_column, cell_renderer, &cellDataProcFunc, &cellDataProcCallbackData, null );
+}
+
+private static extern(C) void cellDataProcFunc (
+    GtkTreeViewColumn *tree_column,
+    GtkCellRenderer *cell,
+    GtkTreeModel *tree_model,
+    GtkTreeIter *iter,
+    void* data)
+{
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    CallbackData* cbdata = cast(CallbackData*)data;
+    return cbdata.display.cellDataProc( tree_column, cell, tree_model, iter, cbdata.data );
+}
+
+void cellDataProc(
+    GtkTreeViewColumn *tree_column,
+    GtkCellRenderer *cell,
+    GtkTreeModel *tree_model,
+    GtkTreeIter *iter,
+    void* data)
+{
+    Widget widget = getWidget (cast(GtkWidget*)data);
+    if (widget is null) return;
+    widget.cellDataProc (tree_column, cell, tree_model, iter, data);
+}
+
+protected override void checkDevice () {
+    if (thread is null) error (SWT.ERROR_WIDGET_DISPOSED);
+    if (thread !is Thread.getThis ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
+    if (isDisposed ()) error (SWT.ERROR_DEVICE_DISPOSED);
+}
+
+static void checkDisplay (Thread thread, bool multiple) {
+    synchronized (Device.classinfo) {
+        for (int i=0; i<Displays.length; i++) {
+            if (Displays [i] !is null) {
+                if (!multiple) SWT.error (SWT.ERROR_NOT_IMPLEMENTED, null, " [multiple displays]"); //$NON-NLS-1$
+                if (Displays [i].thread is thread) SWT.error (SWT.ERROR_THREAD_INVALID_ACCESS);
+            }
+        }
+    }
+}
+
+private static extern(C) int checkIfEventProcFunc (void* display, XEvent* xEvent, char* userData) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    auto disp = cast(Display)userData;
+    return disp.checkIfEventProcMeth( display, xEvent );
+}
+
+int checkIfEventProcMeth (void* display, XEvent* xEvent) {
+    int type = xEvent.type;
+    switch (type) {
+        case OS.VisibilityNotify:
+        case OS.Expose:
+        case OS.GraphicsExpose:
+            break;
+        default:
+            return 0;
+    }
+    GdkWindow* window = OS.gdk_window_lookup ( xEvent.xany.window );
+    if (window is null) return 0;
+    if (flushWindow !is null) {
+        if (flushAll) {
+            auto tempWindow = window;
+            do {
+                if (tempWindow is flushWindow) break;
+            } while ((tempWindow = OS.gdk_window_get_parent (tempWindow)) !is null);
+            if (tempWindow !is flushWindow) return 0;
+        } else {
+            if (window !is flushWindow) return 0;
+        }
+    }
+    *exposeEvent = *cast(XExposeEvent*)xEvent;
+    switch (type) {
+        case OS.Expose:
+        case OS.GraphicsExpose: {
+            flushRect.x = exposeEvent.x;
+            flushRect.y = exposeEvent.y;
+            flushRect.width = exposeEvent.width;
+            flushRect.height = exposeEvent.height;
+            OS.gdk_window_invalidate_rect (window, flushRect, true);
+            exposeEvent.type = -1;
+            memmove (xEvent, exposeEvent, XExposeEvent.sizeof);
+            break;
+        }
+        case OS.VisibilityNotify: {
+            memmove (visibilityEvent, xEvent, XVisibilityEvent.sizeof);
+            GtkWidget* handle;
+            OS.gdk_window_get_user_data (window, cast(void**) & handle);
+            Widget widget = handle !is null ? getWidget (handle) : null;
+            if (auto control = cast(Control)widget ) {
+                if (window is control.paintWindow ()) {
+                    if (visibilityEvent.state is OS.VisibilityFullyObscured) {
+                        control.state |= Widget.OBSCURED;
+                    } else {
+                        control.state &= ~Widget.OBSCURED;
+                    }
+                }
+            }
+            break;
+        default:
+        }
+    }
+    return 0;
+}
+
+/**
+ * Checks that this class can be subclassed.
+ * <p>
+ * IMPORTANT: See the comment in <code>Widget.checkSubclass()</code>.
+ * </p>
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ *
+ * @see Widget#checkSubclass
+ */
+protected void checkSubclass () {
+//PORTING_TODO  if (!isValidClass (getClass ())) error (SWT.ERROR_INVALID_SUBCLASS);
+}
+
+void clearModal (Shell shell) {
+    if (modalShells is null) return;
+    int index = 0, length_ = modalShells.length;
+    while (index < length_) {
+        if (modalShells [index] is shell) break;
+        if (modalShells [index] is null) return;
+        index++;
+    }
+    if (index is length_) return;
+    System.arraycopy (modalShells, index + 1, modalShells, index, --length_ - index);
+    modalShells [length_] = null;
+    if (index is 0 && modalShells [0] is null) modalShells = null;
+    Shell [] shells = getShells ();
+    for (int i=0; i<shells.length; i++) shells [i].updateModal ();
+}
+
+/**
+ * Requests that the connection between SWT and the underlying
+ * operating system be closed.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see Device#dispose
+ *
+ * @since 2.0
+ */
+public void close () {
+    checkDevice ();
+    Event event = new Event ();
+    sendEvent (SWT.Close, event);
+    if (event.doit) dispose ();
+}
+
+/**
+ * Creates the device in the operating system.  If the device
+ * does not have a handle, this method may do nothing depending
+ * on the device.
+ * <p>
+ * This method is called before <code>init</code>.
+ * </p>
+ *
+ * @param data the DeviceData which describes the receiver
+ *
+ * @see #init
+ */
+protected override void create (DeviceData data) {
+    checkSubclass ();
+    checkDisplay(thread = Thread.getThis (), false);
+    createDisplay (data);
+    register (this);
+    if (Default is null) Default = this;
+}
+
+private static extern(C) int XErrorHandler( void*, XErrorEvent* ){
+    getDwtLogger().error ( __FILE__, __LINE__, "*** XError" );
+    byte* p;
+    *p = 3;
+    return 0;
+}
+
+void createDisplay (DeviceData data) {
+    /* Required for g_main_context_wakeup */
+    if (!OS.g_thread_supported ()) {
+        OS.g_thread_init (null);
+    }
+    OS.gtk_set_locale();
+    int cnt = 2;
+    char*[] args = [ "name".ptr, "--sync".ptr, null ];
+    char** a = args.ptr;
+    if (!OS.gtk_init_check (&cnt, &a )) {
+    }
+    assert( cnt is 1 );
+    if (OS.GDK_WINDOWING_X11 ()) xDisplay = cast(void*) OS.GDK_DISPLAY ();
+
+    OS.XSetErrorHandler( &Display.XErrorHandler );
+    char* ptr = OS.gtk_check_version (MAJOR, MINOR, MICRO);
+    if (ptr !is null) {
+        char [] buffer = fromStringz(ptr);
+        getDwtLogger().warn (__FILE__, __LINE__,"***WARNING: {}", buffer );
+        getDwtLogger().warn (__FILE__, __LINE__,"***WARNING: SWT requires GTK {}.{}.{}", MAJOR, MINOR, MICRO );
+        int major = OS.gtk_major_version (), minor = OS.gtk_minor_version (), micro = OS.gtk_micro_version ();
+        getDwtLogger().warn (__FILE__, __LINE__,"***WARNING: Detected: {}.{}.{}", major, minor, micro);
+    }
+    if (fixed_type is 0) {
+        GTypeInfo* fixed_info = new GTypeInfo ();
+        fixed_info.class_size = GtkFixedClass.sizeof;
+        fixed_info.class_init = & fixedClassInitProcFunc;
+        fixed_info.instance_size = GtkFixed.sizeof;
+        fixed_type = OS.g_type_register_static (OS.GTK_TYPE_FIXED (), "SwtFixed".ptr, fixed_info, 0);
+    }
+    if (text_renderer_type is 0) {
+        GTypeInfo* renderer_info = new GTypeInfo ();
+        renderer_info.class_size = GtkCellRendererTextClass.sizeof;
+        renderer_info.class_init = & rendererClassInitProcFunc;
+        renderer_info.instance_size = GtkCellRendererText.sizeof;
+        text_renderer_type = OS.g_type_register_static (OS.GTK_TYPE_CELL_RENDERER_TEXT (), "SwtTextRenderer".ptr, renderer_info, 0);
+    }
+    if (pixbuf_renderer_type is 0) {
+        GTypeInfo* renderer_info = new GTypeInfo ();
+        renderer_info.class_size = GtkCellRendererPixbufClass.sizeof;
+        renderer_info.class_init = & rendererClassInitProcFunc;
+        renderer_info.instance_size = GtkCellRendererPixbuf.sizeof;
+        pixbuf_renderer_type = OS.g_type_register_static (OS.GTK_TYPE_CELL_RENDERER_PIXBUF (), "SwtPixbufRenderer".ptr, renderer_info, 0);
+    }
+    if (toggle_renderer_type is 0) {
+        GTypeInfo* renderer_info = new GTypeInfo ();
+        renderer_info.class_size = GtkCellRendererToggleClass.sizeof;
+        renderer_info.class_init = & rendererClassInitProcFunc;
+        renderer_info.instance_size = GtkCellRendererToggle.sizeof;
+        toggle_renderer_type = OS.g_type_register_static (OS.GTK_TYPE_CELL_RENDERER_TOGGLE (), "SwtToggleRenderer".ptr, renderer_info, 0);
+    }
+
+    OS.gtk_widget_set_default_direction (OS.GTK_TEXT_DIR_LTR);
+    OS.gdk_rgb_init ();
+    char* p = toStringz(APP_NAME);
+    OS.g_set_prgname (p);
+    OS.gdk_set_program_class (p);
+    OS.gtk_rc_parse_string ("style \"swt-flat\" { GtkToolbar::shadow-type = none } widget \"*.swt-toolbar-flat\" style : highest \"swt-flat\"".ptr);
+
+    /* Initialize the hidden shell */
+    shellHandle = OS.gtk_window_new (OS.GTK_WINDOW_TOPLEVEL);
+    if (shellHandle is null) SWT.error (SWT.ERROR_NO_HANDLES);
+    OS.gtk_widget_realize (shellHandle);
+
+    /* Initialize the filter and event callback */
+    OS.gdk_event_handler_set (&eventProcFunc, cast(void*)this, null);
+    //filterProcCallbackData.display = this;
+    //filterProcCallbackData.data = null;
+    //OS.gdk_window_add_filter  (null, &filterProcFunc, cast(void*)&filterProcCallbackData );
+    doWindowAddFilter( &filterProcCallbackData, null, null );
+}
+
+/*
+ * Used by Shell
+ */
+package void doWindowAddFilter( CallbackData* cbdata, GdkWindow* window, GtkWidget* widget ){
+    cbdata.display = this;
+    cbdata.data = widget;
+    OS.gdk_window_add_filter (window, &filterProcFunc, cbdata );
+}
+
+package void doWindowRemoveFilter( CallbackData* cbdata, GdkWindow* window, GtkWidget* widget ){
+    cbdata.display = this;
+    cbdata.data = widget;
+    OS.gdk_window_remove_filter(window, &filterProcFunc, cbdata );
+}
+
+Image createImage (String name) {
+    auto style = OS.gtk_widget_get_default_style ();
+    String buffer = name;
+    auto pixbuf = OS.gtk_icon_set_render_icon (
+        OS.gtk_icon_factory_lookup_default (buffer.ptr), style,
+        OS.GTK_TEXT_DIR_NONE,
+        OS.GTK_STATE_NORMAL,
+        OS.GTK_ICON_SIZE_DIALOG, null, null );
+    if (pixbuf is null) return null;
+    int width = OS.gdk_pixbuf_get_width (pixbuf);
+    int height = OS.gdk_pixbuf_get_height (pixbuf);
+    int stride = OS.gdk_pixbuf_get_rowstride (pixbuf);
+    bool hasAlpha = cast(bool)OS.gdk_pixbuf_get_has_alpha (pixbuf);
+    char* pixels = OS.gdk_pixbuf_get_pixels (pixbuf);
+    byte [] data = new byte [stride * height];
+    memmove (data.ptr, pixels, data.length);
+    OS.g_object_unref (pixbuf);
+    ImageData imageData = null;
+    if (hasAlpha) {
+        PaletteData palette = new PaletteData (0xFF000000, 0xFF0000, 0xFF00);
+        imageData = new ImageData (width, height, 32, palette);
+        byte [] alpha = new byte [stride * height];
+        for (int y=0; y<height; y++) {
+            for (int x=0; x<width; x++) {
+                alpha [y*width+x] = data [y*stride+x*4+3];
+                data [y*stride+x*4+3] = 0;
+            }
+        }
+        imageData.setAlphas (0, 0, width * height, alpha, 0);
+    } else {
+        PaletteData palette = new PaletteData (0xFF0000, 0xFF00, 0xFF);
+        imageData = new ImageData (width, height, 24, palette);
+    }
+    imageData.data = data;
+    imageData.bytesPerLine = stride;
+    return new Image (this, imageData);
+}
+
+static GdkPixbuf* createPixbuf(Image image) {
+    int w, h;
+    OS.gdk_drawable_get_size (image.pixmap, &w, &h);
+    auto colormap = OS.gdk_colormap_get_system ();
+    GdkPixbuf* pixbuf;
+    bool hasMask = image.mask !is null && OS.gdk_drawable_get_depth (image.mask) is 1;
+    if (hasMask) {
+        pixbuf = OS.gdk_pixbuf_new (OS.GDK_COLORSPACE_RGB, true, 8, w, h );
+        if (pixbuf is null) SWT.error (SWT.ERROR_NO_HANDLES);
+        OS.gdk_pixbuf_get_from_drawable (pixbuf, image.pixmap, colormap, 0, 0, 0, 0, w, h);
+        auto maskPixbuf = OS.gdk_pixbuf_new(OS.GDK_COLORSPACE_RGB, false, 8, w, h);
+        if (maskPixbuf is null) SWT.error (SWT.ERROR_NO_HANDLES);
+        OS.gdk_pixbuf_get_from_drawable(maskPixbuf, image.mask, null, 0, 0, 0, 0, w, h);
+        int stride = OS.gdk_pixbuf_get_rowstride(pixbuf);
+        auto pixels = OS.gdk_pixbuf_get_pixels(pixbuf);
+        byte[] line = new byte[stride];
+        int maskStride = OS.gdk_pixbuf_get_rowstride(maskPixbuf);
+        auto maskPixels = OS.gdk_pixbuf_get_pixels(maskPixbuf);
+        byte[] maskLine = new byte[maskStride];
+        for (int y=0; y<h; y++) {
+            auto offset = pixels + (y * stride);
+            memmove(line.ptr, offset, stride);
+            auto maskOffset = maskPixels + (y * maskStride);
+            memmove(maskLine.ptr, maskOffset, maskStride);
+            for (int x=0; x<w; x++) {
+                if (maskLine[x * 3] is 0) {
+                    line[x * 4 + 3] = 0;
+                }
+            }
+            memmove(offset, line.ptr, stride);
+        }
+        OS.g_object_unref(maskPixbuf);
+    } else {
+        ImageData data = image.getImageData ();
+        bool hasAlpha = data.getTransparencyType () is SWT.TRANSPARENCY_ALPHA;
+        pixbuf = OS.gdk_pixbuf_new (OS.GDK_COLORSPACE_RGB, hasAlpha, 8, w, h);
+        if (pixbuf is null) SWT.error (SWT.ERROR_NO_HANDLES);
+        OS.gdk_pixbuf_get_from_drawable (pixbuf, image.pixmap, colormap, 0, 0, 0, 0, w, h);
+        if (hasAlpha) {
+            byte [] alpha = data.alphaData;
+            int stride = OS.gdk_pixbuf_get_rowstride (pixbuf);
+            auto pixels = OS.gdk_pixbuf_get_pixels (pixbuf);
+            byte [] line = new byte [stride];
+            for (int y = 0; y < h; y++) {
+                auto offset = pixels + (y * stride);
+                memmove (line.ptr, offset, stride);
+                for (int x = 0; x < w; x++) {
+                    line [x*4+3] = alpha [y*w+x];
+                }
+                memmove (offset, line.ptr, stride);
+            }
+        }
+    }
+    return pixbuf;
+}
+
+static void deregister (Display display) {
+    synchronized (Device.classinfo) {
+        for (int i=0; i<Displays.length; i++) {
+            if (display is Displays [i]) Displays [i] = null;
+        }
+    }
+}
+
+/**
+ * Destroys the device in the operating system and releases
+ * the device's handle.  If the device does not have a handle,
+ * this method may do nothing depending on the device.
+ * <p>
+ * This method is called after <code>release</code>.
+ * </p>
+ * @see Device#dispose
+ * @see #release
+ */
+protected override void destroy () {
+    if (this is Default) Default = null;
+    deregister (this);
+    destroyDisplay ();
+}
+
+void destroyDisplay () {
+}
+
+static extern(C) int /*long*/ emissionFunc (GSignalInvocationHint* ihint, uint n_param_values, GValue* param_values, void* data) {
+    auto cb = cast(CallbackData*)data;
+    return cb.display.emissionProc( ihint, n_param_values, param_values, cb.data );
+}
+
+int /*long*/ emissionProc (GSignalInvocationHint* ihint, uint n_param_values, GValue* param_values, void* data) {
+    if (OS.gtk_widget_get_toplevel (OS.g_value_peek_pointer(param_values)) is data) {
+        OS.gtk_widget_set_direction (OS.g_value_peek_pointer(param_values), OS.GTK_TEXT_DIR_RTL);
+    }
+    return 1;
+}
+
+/**
+ * Returns the display which the given thread is the
+ * user-interface thread for, or null if the given thread
+ * is not a user-interface thread for any display.  Specifying
+ * <code>null</code> as the thread will return <code>null</code>
+ * for the display.
+ *
+ * @param thread the user-interface thread
+ * @return the display for the given thread
+ */
+public static Display findDisplay (Thread thread) {
+    synchronized (Device.classinfo) {
+        for (int i=0; i<Displays.length; i++) {
+            Display display = Displays [i];
+            if (display !is null && display.thread is thread) {
+                return display;
+            }
+        }
+        return null;
+    }
+}
+
+/**
+ * Causes the <code>run()</code> method of the runnable to
+ * be invoked by the user-interface thread just before the
+ * receiver is disposed.  Specifying a <code>null</code> runnable
+ * is ignored.
+ *
+ * @param runnable code to run at dispose time.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public void disposeExec (Runnable runnable) {
+    checkDevice ();
+    if (disposeList is null) disposeList = new Runnable [4];
+    for (int i=0; i<disposeList.length; i++) {
+        if (disposeList [i] is null) {
+            disposeList [i] = runnable;
+            return;
+        }
+    }
+    Runnable [] newDisposeList = new Runnable [disposeList.length + 4];
+    SimpleType!(Runnable).arraycopy (disposeList, 0, newDisposeList, 0, disposeList.length);
+    newDisposeList [disposeList.length] = runnable;
+    disposeList = newDisposeList;
+}
+
+/**
+ * Does whatever display specific cleanup is required, and then
+ * uses the code in <code>SWTError.error</code> to handle the error.
+ *
+ * @param code the descriptive error code
+ *
+ * @see SWTError#error
+ */
+void error (int code) {
+    SWT.error (code);
+}
+
+private static extern(C) void eventProcFunc (GdkEvent* event, void* data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    Display disp = cast(Display)data;
+    disp.eventProcMeth(event);
+}
+void eventProcMeth (GdkEvent* event) {
+    /*
+    * Use gdk_event_get_time() rather than event.time or
+    * gtk_get_current_event_time().  If the event does not
+    * have a time stamp, then the field will contain garbage.
+    * Note that calling gtk_get_current_event_time() from
+    * outside of gtk_main_do_event() seems to always
+    * return zero.
+    */
+    int time = OS.gdk_event_get_time (event);
+    if (time !is 0) lastEventTime = time;
+
+    int eventType = OS.GDK_EVENT_TYPE (event);
+    switch (eventType) {
+        case OS.GDK_BUTTON_PRESS:
+        case OS.GDK_KEY_PRESS:
+            lastUserEventTime = time;
+        default:
+    }
+    bool dispatch = true;
+    if (dispatchEvents !is null) {
+        dispatch = false;
+        for (int i = 0; i < dispatchEvents.length; i++) {
+            if (eventType is dispatchEvents [i]) {
+                dispatch = true;
+                break;
+            }
+        }
+    }
+    if (!dispatch) {
+        addGdkEvent (OS.gdk_event_copy (event));
+        return 0;
+    }
+    OS.gtk_main_do_event (event);
+    if (dispatchEvents is null) putGdkEvents ();
+    return 0;
+}
+
+/**
+ * Given the operating system handle for a widget, returns
+ * the instance of the <code>Widget</code> subclass which
+ * represents it in the currently running application, if
+ * such exists, or null if no matching widget can be found.
+ * <p>
+ * <b>IMPORTANT:</b> This method should not be called from
+ * application code. The arguments are platform-specific.
+ * </p>
+ *
+ * @param handle the handle for the widget
+ * @return the SWT widget that the handle represents
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Widget findWidget (GtkWidget* handle) {
+    checkDevice ();
+    return getWidget (handle);
+}
+
+/**
+ * Given the operating system handle for a widget,
+ * and widget-specific id, returns the instance of
+ * the <code>Widget</code> subclass which represents
+ * the handle/id pair in the currently running application,
+ * if such exists, or null if no matching widget can be found.
+ * <p>
+ * <b>IMPORTANT:</b> This method should not be called from
+ * application code. The arguments are platform-specific.
+ * </p>
+ *
+ * @param handle the handle for the widget
+ * @param id the id for the subwidget (usually an item)
+ * @return the SWT widget that the handle/id pair represents
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.1
+ */
+public Widget findWidget (GtkWidget* handle, int id) {
+    checkDevice ();
+    return null;
+}
+
+/**
+ * Given a widget and a widget-specific id, returns the
+ * instance of the <code>Widget</code> subclass which represents
+ * the widget/id pair in the currently running application,
+ * if such exists, or null if no matching widget can be found.
+ *
+ * @param widget the widget
+ * @param id the id for the subwidget (usually an item)
+ * @return the SWT subwidget (usually an item) that the widget/id pair represents
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.3
+ */
+public Widget findWidget (Widget widget, int /*long*/ id) {
+    checkDevice ();
+    return null;
+}
+
+private static extern(C) void fixedClassInitProcFunc (void* g_class, void* class_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    GtkWidgetClass* klass = cast(GtkWidgetClass*)g_class;
+    klass.map = &fixedMapProcFunc;
+    oldFixedSizeAllocateProc = klass.size_allocate;
+    klass.size_allocate = &fixedSizeAllocateProc;
+}
+
+private static extern(C)  void fixedMapProcFunc (GtkWidget * handle) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    Display display = getCurrent ();
+    Widget widget = display.getWidget (handle);
+    if (widget !is null) widget.fixedMapProc (handle);
+}
+
+private static extern(C) static void fixedSizeAllocateProc (GtkWidget* handle, GtkAllocation* allocation) {
+    Display display = getCurrent ();
+    Widget widget = display.getWidget (handle);
+    if (widget !is null) return widget.fixedSizeAllocateProc (handle, allocation);
+    return oldFixedSizeAllocateProc(handle, allocation);
+}
+
+private static extern(C) void rendererClassInitProcFunc (void* g_class, void* class_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    GtkCellRendererClass* klass = cast(GtkCellRendererClass*)g_class;
+    klass.render = &rendererRenderProcFunc;
+    klass.get_size = &rendererGetSizeProcFunc;
+
+}
+private static extern(C) void rendererGetSizeProcFunc(
+    GtkCellRenderer      *cell,
+    GtkWidget            *handle,
+    GdkRectangle         *cell_area,
+    int                  *x_offset,
+    int                  *y_offset,
+    int                  *width,
+    int                  *height)
+{
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    Display display = getCurrent ();
+    Widget widget = display.getWidget (handle);
+    if (widget !is null) widget.rendererGetSizeProc (cell, handle, cell_area, x_offset, y_offset, width, height);
+}
+private static extern(C) void rendererRenderProcFunc(GtkCellRenderer * cell, GdkDrawable * window, GtkWidget * handle, GdkRectangle *background_area, GdkRectangle *cell_area, GdkRectangle *expose_area, int flags){
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    Display display = getCurrent ();
+    Widget widget = display.getWidget (handle);
+    if (widget !is null) widget.rendererRenderProc (cell, window, handle, background_area, cell_area, expose_area, flags);
+}
+
+void flushExposes (GdkWindow* window, bool all) {
+    OS.gdk_flush ();
+    OS.gdk_flush ();
+    if (OS.GDK_WINDOWING_X11 ()) {
+        this.flushWindow = window;
+        this.flushAll = all;
+        auto xDisplay = OS.GDK_DISPLAY ();
+        auto xEvent = cast(XEvent*)OS.g_malloc (XEvent.sizeof);
+        OS.XCheckIfEvent (xDisplay, xEvent, &checkIfEventProcFunc, cast(char*)this );
+        OS.g_free (xEvent);
+        this.flushWindow = null;
+    }
+}
+
+/**
+ * Returns the currently active <code>Shell</code>, or null
+ * if no shell belonging to the currently running application
+ * is active.
+ *
+ * @return the active shell or null
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Shell getActiveShell () {
+    checkDevice ();
+    return activeShell;
+}
+
+/**
+ * Returns a rectangle describing the receiver's size and location. Note that
+ * on multi-monitor systems the origin can be negative.
+ *
+ * @return the bounding rectangle
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public override Rectangle getBounds () {
+    checkDevice ();
+    return new Rectangle (0, 0, OS.gdk_screen_width (), OS.gdk_screen_height ());
+}
+
+/**
+ * Returns the display which the currently running thread is
+ * the user-interface thread for, or null if the currently
+ * running thread is not a user-interface thread for any display.
+ *
+ * @return the current display
+ */
+public static Display getCurrent () {
+    return findDisplay (Thread.getThis ());
+}
+
+int getCaretBlinkTime () {
+//  checkDevice ();
+    auto settings = OS.gtk_settings_get_default ();
+    if (settings is null) return 500;
+    int  buffer;
+    OS.g_object_get1 (settings, OS.gtk_cursor_blink.ptr, &buffer );
+    if (buffer  is 0) return 0;
+    OS.g_object_get1 (settings, OS.gtk_cursor_blink_time.ptr, &buffer);
+    if (buffer  is 0) return 500;
+    /*
+    * By experimentation, GTK application don't use the whole
+    * blink cycle time.  Instead, they divide up the time, using
+    * an effective blink rate of about 1/2 the total time.
+    */
+    return buffer / 2;
+}
+
+/**
+ * Returns the control which the on-screen pointer is currently
+ * over top of, or null if it is not currently over one of the
+ * controls built by the currently running application.
+ *
+ * @return the control under the cursor
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Control getCursorControl () {
+    checkDevice();
+    int x, y;
+    GtkWidget* handle;
+    GtkWidget* user_data;
+    auto window = OS.gdk_window_at_pointer (&x, &y);
+    if (window !is null) {
+        OS.gdk_window_get_user_data (window, cast(void**)&user_data);
+        handle = user_data;
+    } else {
+        /*
+        * Feature in GTK. gdk_window_at_pointer() will not return a window
+        * if the pointer is over a foreign embedded window. The fix is to use
+        * XQueryPointer to find the containing GDK window.
+        */
+        if (!OS.GDK_WINDOWING_X11 ()) return null;
+        OS.gdk_error_trap_push ();
+        int unusedInt;
+        uint unusedUInt;
+        uint unusedPtr;
+        uint buffer;
+        uint xWindow, xParent = OS.XDefaultRootWindow (xDisplay);
+        do {
+            if (OS.XQueryPointer (xDisplay, xParent, &unusedPtr, &buffer, &unusedInt, &unusedInt, &unusedInt, &unusedInt, &unusedUInt) is 0) {
+                handle = null;
+                break;
+            }
+            if ((xWindow = buffer) !is 0) {
+                xParent = xWindow;
+                auto gdkWindow = OS.gdk_window_lookup (xWindow);
+                if (gdkWindow !is null) {
+                    OS.gdk_window_get_user_data (gdkWindow, cast(void**)&user_data);
+                    if (user_data !is null) handle = user_data;
+                }
+            }
+        } while (xWindow !is 0);
+        OS.gdk_error_trap_pop ();
+    }
+    if (handle is null) return null;
+    do {
+        Widget widget = getWidget (handle);
+        if (widget !is null && (null !is cast(Control)widget)) {
+            Control control = cast(Control) widget;
+            if (control.isEnabled ()) return control;
+        }
+    } while ((handle = OS.gtk_widget_get_parent (handle)) !is null);
+    return null;
+}
+
+bool filterEvent (Event event) {
+    if (filterTable !is null) filterTable.sendEvent (event);
+    return false;
+}
+
+bool filters (int eventType) {
+    if (filterTable is null) return false;
+    return filterTable.hooks (eventType);
+}
+
+private static extern(C) int filterProcFunc (GdkXEvent* xEvent, GdkEvent* gdkEvent, void* data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    auto callbackdata = cast(CallbackData*)data;
+    auto disp = callbackdata.display;
+    if( disp is null ) return 0;
+    auto res =  disp.filterProcMeth(xEvent,gdkEvent,callbackdata);
+    return res;
+}
+
+int filterProcMeth (GdkXEvent* xEvent, GdkEvent* gdkEvent, CallbackData* callbackData) {
+    if( callbackData.data is null ){
+        /*
+         * Feature in GTK.  When button 4, 5, 6, or 7 is released, GTK
+         * does not deliver a corresponding GTK event.  Button 6 and 7
+         * are mapped to buttons 4 and 5 in SWT.  The fix is to change
+         * the button number of the event to a negative number so that
+         * it gets dispatched by GTK.  SWT has been modified to look
+         * for negative button numbers.
+         */
+        XButtonEvent* mouseEvent = cast(XButtonEvent*) xEvent;
+        if (mouseEvent.type is OS.ButtonRelease) {
+            switch (mouseEvent.button) {
+                case 6:
+                case 7:
+                    mouseEvent.button = -mouseEvent.button;
+                    break;
+                default:
+            }
+        }
+    }
+    Widget widget = getWidget (cast(GtkWidget*)callbackData.data);
+    if (widget is null) return 0;
+    return widget.filterProc (cast(XEvent*)xEvent, gdkEvent, callbackData.data);
+}
+
+/**
+ * Returns the location of the on-screen pointer relative
+ * to the top left corner of the screen.
+ *
+ * @return the cursor location
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Point getCursorLocation () {
+    checkDevice ();
+    int x, y;
+    OS.gdk_window_get_pointer (null, &x, &y, null);
+    return new Point (x, y);
+}
+
+/**
+ * Returns an array containing the recommended cursor sizes.
+ *
+ * @return the array of cursor sizes
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.0
+ */
+public Point [] getCursorSizes () {
+    checkDevice ();
+    return [new Point (16, 16), new Point (32, 32)];
+}
+
+/**
+ * Returns the application defined property of the receiver
+ * with the specified name, or null if it has not been set.
+ * <p>
+ * Applications may have associated arbitrary objects with the
+ * receiver in this fashion. If the objects stored in the
+ * properties need to be notified when the display is disposed
+ * of, it is the application's responsibility to provide a
+ * <code>disposeExec()</code> handler which does so.
+ * </p>
+ *
+ * @param key the name of the property
+ * @return the value of the property or null if it has not been set
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #setData(String, Object)
+ * @see #disposeExec(Runnable)
+ */
+public Object getData (String key) {
+    checkDevice ();
+    // SWT extension: allow null for zero length string
+    //if (key is null) error (SWT.ERROR_NULL_ARGUMENT);
+    if (key.equals (DISPATCH_EVENT_KEY)) {
+        return new ArrayWrapperInt(dispatchEvents);
+    }
+    if (key.equals (GET_MODAL_DIALOG)) {
+        return modalDialog;
+    }
+    if (key.equals (GET_DIRECTION_PROC_KEY)) {
+        return new LONG (cast(int) &setDirectionProcFunc);
+    }
+    if (key.equals (GET_EMISSION_PROC_KEY)) {
+        return new LONG (cast(int) &emissionFunc);
+    }
+    if (keys is null) return null;
+    for (int i=0; i<keys.length; i++) {
+        if (keys [i].equals(key)) return values [i];
+    }
+    return null;
+}
+
+/**
+ * Returns the application defined, display specific data
+ * associated with the receiver, or null if it has not been
+ * set. The <em>display specific data</em> is a single,
+ * unnamed field that is stored with every display.
+ * <p>
+ * Applications may put arbitrary objects in this field. If
+ * the object stored in the display specific data needs to
+ * be notified when the display is disposed of, it is the
+ * application's responsibility to provide a
+ * <code>disposeExec()</code> handler which does so.
+ * </p>
+ *
+ * @return the display specific data
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #setData(Object)
+ * @see #disposeExec(Runnable)
+ */
+public Object getData () {
+    checkDevice ();
+    return data;
+}
+
+/**
+ * Returns a point whose x coordinate is the horizontal
+ * dots per inch of the display, and whose y coordinate
+ * is the vertical dots per inch of the display.
+ *
+ * @return the horizontal and vertical DPI
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public override Point getDPI () {
+    checkDevice ();
+    int widthMM = OS.gdk_screen_width_mm ();
+    int width = OS.gdk_screen_width ();
+    int dpi = Compatibility.round (254 * width, widthMM * 10);
+    return new Point (dpi, dpi);
+}
+
+int /*long*/ gtk_fixed_get_type () {
+    return fixed_type;
+}
+
+int /*long*/ gtk_cell_renderer_text_get_type () {
+    return text_renderer_type;
+}
+
+int /*long*/ gtk_cell_renderer_pixbuf_get_type () {
+    return pixbuf_renderer_type;
+}
+
+int /*long*/ gtk_cell_renderer_toggle_get_type () {
+    return toggle_renderer_type;
+}
+
+/**
+ * Returns the default display. One is created (making the
+ * thread that invokes this method its user-interface thread)
+ * if it did not already exist.
+ *
+ * @return the default display
+ */
+public static Display getDefault () {
+    synchronized (Device.classinfo) {
+        if (Default is null) Default = new Display ();
+        return Default;
+    }
+}
+
+// /+static bool isValidClass (Class clazz) {
+// //PORTING_TODO   String name = clazz.getName ();
+// //PORTING_TODO   int index = name.lastIndexOf ('.');
+// //PORTING_TODO   return name.substring (0, index + 1)==/*eq*/ PACKAGE_PREFIX;
+//     return true;
+// }+/
+
+/**
+ * Returns the button dismissal alignment, one of <code>LEFT</code> or <code>RIGHT</code>.
+ * The button dismissal alignment is the ordering that should be used when positioning the
+ * default dismissal button for a dialog.  For example, in a dialog that contains an OK and
+ * CANCEL button, on platforms where the button dismissal alignment is <code>LEFT</code>, the
+ * button ordering should be OK/CANCEL.  When button dismissal alignment is <code>RIGHT</code>,
+ * the button ordering should be CANCEL/OK.
+ *
+ * @return the button dismissal order
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 2.1
+ */
+public int getDismissalAlignment () {
+    checkDevice ();
+    return SWT.RIGHT;
+}
+
+/**
+ * Returns the longest duration, in milliseconds, between
+ * two mouse button clicks that will be considered a
+ * <em>double click</em> by the underlying operating system.
+ *
+ * @return the double click time
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public int getDoubleClickTime () {
+    checkDevice ();
+    auto settings = OS.gtk_settings_get_default ();
+    int buffer;
+    OS.g_object_get1 (settings, OS.gtk_double_click_time.ptr, &buffer);
+    return buffer;
+}
+
+/**
+ * Returns the control which currently has keyboard focus,
+ * or null if keyboard events are not currently going to
+ * any of the controls built by the currently running
+ * application.
+ *
+ * @return the control under the cursor
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Control getFocusControl () {
+    checkDevice ();
+    if (focusControl !is null && !focusControl.isDisposed ()) {
+        return focusControl;
+    }
+    if (activeShell is null) return null;
+    auto shellHandle = activeShell.shellHandle;
+    auto handle = OS.gtk_window_get_focus (cast(GtkWindow*)shellHandle);
+    if (handle is null) return null;
+    do {
+        Widget widget = getWidget (handle);
+        if (widget !is null && (null !is cast(Control)widget)) {
+            Control control = cast(Control) widget;
+            return control.isEnabled () ? control : null;
+        }
+    } while ((handle = OS.gtk_widget_get_parent (handle)) !is null);
+    return null;
+}
+
+/**
+ * Returns true when the high contrast mode is enabled.
+ * Otherwise, false is returned.
+ * <p>
+ * Note: This operation is a hint and is not supported on
+ * platforms that do not have this concept.
+ * </p>
+ *
+ * @return the high contrast mode
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.0
+ */
+public bool getHighContrast () {
+    checkDevice ();
+    return false;
+}
+
+public override int getDepth () {
+    checkDevice ();
+    auto visual = OS.gdk_visual_get_system();
+    return visual.depth;
+}
+
+/**
+ * Returns the maximum allowed depth of icons on this display, in bits per pixel.
+ * On some platforms, this may be different than the actual depth of the display.
+ *
+ * @return the maximum icon depth
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see Device#getDepth
+ */
+public int getIconDepth () {
+    checkDevice ();
+    return getDepth ();
+}
+
+/**
+ * Returns an array containing the recommended icon sizes.
+ *
+ * @return the array of icon sizes
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see Decorations#setImages(Image[])
+ *
+ * @since 3.0
+ */
+public Point [] getIconSizes () {
+    checkDevice ();
+    return [new Point (16, 16), new Point (32, 32)];
+}
+
+int getLastEventTime () {
+    return lastEventTime;
+}
+
+int getMessageCount () {
+    return synchronizer.getMessageCount ();
+}
+
+Dialog getModalDialog () {
+    return modalDialog;
+}
+
+/**
+ * Returns the work area, an EWMH property to store the size
+ * and position of the screen not covered by dock and panel
+ * windows.  See http://freedesktop.org/Standards/wm-spec.
+ */
+Rectangle getWorkArea() {
+    auto atom = OS.gdk_atom_intern ("_NET_WORKAREA".ptr, true);
+    if (atom is null/*OS.GDK_NONE*/) return null;
+    void* actualType;
+    int actualFormat;
+    int actualLength;
+    char* data;
+    if (!OS.gdk_property_get (cast(GdkDrawable*)OS.GDK_ROOT_PARENT (), atom, null/*OS.GDK_NONE*/, 0, 16, 0, &actualType, &actualFormat, &actualLength, &data)) {
+        return null;
+    }
+    Rectangle result = null;
+    if (data !is null) {
+        if (actualLength is 16) {
+            int[] values = (cast(int*)data)[0..4];
+            result = new Rectangle (values [0],values [1],values [2],values [3]);
+        } else if (actualLength is 32) {
+            long[] values = (cast(long*)data)[0..4];
+            result = new Rectangle (cast(int)values [0],cast(int)values [1],cast(int)values [2],cast(int)values [3]);
+        }
+        OS.g_free (data);
+    }
+    return result;
+}
+
+/**
+ * Returns an array of monitors attached to the device.
+ *
+ * @return the array of monitors
+ *
+ * @since 3.0
+ */
+public org.eclipse.swt.widgets.Monitor.Monitor [] getMonitors () {
+    checkDevice ();
+    org.eclipse.swt.widgets.Monitor.Monitor [] monitors = null;
+    Rectangle workArea = getWorkArea();
+    auto screen = OS.gdk_screen_get_default ();
+    if (screen !is null) {
+        int monitorCount = OS.gdk_screen_get_n_monitors (screen);
+        if (monitorCount > 0) {
+            monitors = new org.eclipse.swt.widgets.Monitor.Monitor [monitorCount];
+            GdkRectangle* dest = new GdkRectangle ();
+            for (int i = 0; i < monitorCount; i++) {
+                OS.gdk_screen_get_monitor_geometry (screen, i, dest);
+                auto monitor = new org.eclipse.swt.widgets.Monitor.Monitor ();
+                monitor.handle = i;
+                monitor.x = dest.x;
+                monitor.y = dest.y;
+                monitor.width = dest.width;
+                monitor.height = dest.height;
+                if (i is 0 && workArea !is null) {
+                    monitor.clientX = workArea.x;
+                    monitor.clientY = workArea.y;
+                    monitor.clientWidth = workArea.width;
+                    monitor.clientHeight = workArea.height;
+                } else {
+                    monitor.clientX = monitor.x;
+                    monitor.clientY = monitor.y;
+                    monitor.clientWidth = monitor.width;
+                    monitor.clientHeight = monitor.height;
+                }
+                monitors [i] = monitor;
+            }
+        }
+    }
+    if (monitors is null) {
+        /* No multimonitor support detected, default to one monitor */
+        auto monitor = new org.eclipse.swt.widgets.Monitor.Monitor ();
+        Rectangle bounds = getBounds ();
+        monitor.x = bounds.x;
+        monitor.y = bounds.y;
+        monitor.width = bounds.width;
+        monitor.height = bounds.height;
+        if (workArea !is null) {
+            monitor.clientX = workArea.x;
+            monitor.clientY = workArea.y;
+            monitor.clientWidth = workArea.width;
+            monitor.clientHeight = workArea.height;
+        } else {
+            monitor.clientX = monitor.x;
+            monitor.clientY = monitor.y;
+            monitor.clientWidth = monitor.width;
+            monitor.clientHeight = monitor.height;
+        }
+        monitors = [ monitor ];
+    }
+    return monitors;
+}
+
+/**
+ * Returns the primary monitor for that device.
+ *
+ * @return the primary monitor
+ *
+ * @since 3.0
+ */
+public org.eclipse.swt.widgets.Monitor.Monitor getPrimaryMonitor () {
+    checkDevice ();
+    auto monitors = getMonitors ();
+    return monitors [0];
+}
+
+/**
+ * Returns a (possibly empty) array containing all shells which have
+ * not been disposed and have the receiver as their display.
+ *
+ * @return the receiver's shells
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Shell [] getShells () {
+    checkDevice ();
+    int index = 0;
+    Shell [] result = new Shell [16];
+    for (int i = 0; i < widgetTable.length; i++) {
+        Widget widget = widgetTable [i];
+        if (widget !is null && (null !is cast(Shell)widget)) {
+            int j = 0;
+            while (j < index) {
+                if (result [j] is widget) break;
+                j++;
+            }
+            if (j is index) {
+                if (index is result.length) {
+                    Shell [] newResult = new Shell [index + 16];
+                    System.arraycopy (result, 0, newResult, 0, index);
+                    result = newResult;
+                }
+                result [index++] = cast(Shell) widget;
+            }
+        }
+    }
+    if (index is result.length) return result;
+    Shell [] newResult = new Shell [index];
+    System.arraycopy (result, 0, newResult, 0, index);
+    return newResult;
+}
+
+/**
+ * Gets the synchronizer used by the display.
+ *
+ * @return the receiver's synchronizer
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.4
+ */
+public Synchronizer getSynchronizer () {
+    checkDevice ();
+    return synchronizer;
+}
+
+/**
+ * Returns the thread that has invoked <code>syncExec</code>
+ * or null if no such runnable is currently being invoked by
+ * the user-interface thread.
+ * <p>
+ * Note: If a runnable invoked by asyncExec is currently
+ * running, this method will return null.
+ * </p>
+ *
+ * @return the receiver's sync-interface thread
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Thread getSyncThread () {
+    synchronized (Device.classinfo) {
+        if (isDisposed ()) error (SWT.ERROR_DEVICE_DISPOSED);
+        return synchronizer.syncThread;
+    }
+}
+
+/**
+ * Returns the matching standard color for the given
+ * constant, which should be one of the color constants
+ * specified in class <code>SWT</code>. Any value other
+ * than one of the SWT color constants which is passed
+ * in will result in the color black. This color should
+ * not be free'd because it was allocated by the system,
+ * not the application.
+ *
+ * @param id the color constant
+ * @return the matching color
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see SWT
+ */
+public override Color getSystemColor (int id) {
+    checkDevice ();
+    GdkColor* gdkColor = null;
+    switch (id) {
+        case SWT.COLOR_INFO_FOREGROUND:                     gdkColor = COLOR_INFO_FOREGROUND; break;
+        case SWT.COLOR_INFO_BACKGROUND:                     gdkColor = COLOR_INFO_BACKGROUND; break;
+        case SWT.COLOR_TITLE_FOREGROUND:                    gdkColor = COLOR_TITLE_FOREGROUND; break;
+        case SWT.COLOR_TITLE_BACKGROUND:                    gdkColor = COLOR_TITLE_BACKGROUND; break;
+        case SWT.COLOR_TITLE_BACKGROUND_GRADIENT:           gdkColor = COLOR_TITLE_BACKGROUND_GRADIENT; break;
+        case SWT.COLOR_TITLE_INACTIVE_FOREGROUND:           gdkColor = COLOR_TITLE_INACTIVE_FOREGROUND; break;
+        case SWT.COLOR_TITLE_INACTIVE_BACKGROUND:           gdkColor = COLOR_TITLE_INACTIVE_BACKGROUND; break;
+        case SWT.COLOR_TITLE_INACTIVE_BACKGROUND_GRADIENT:  gdkColor = COLOR_TITLE_INACTIVE_BACKGROUND_GRADIENT; break;
+        case SWT.COLOR_WIDGET_DARK_SHADOW:                  gdkColor = COLOR_WIDGET_DARK_SHADOW; break;
+        case SWT.COLOR_WIDGET_NORMAL_SHADOW:                gdkColor = COLOR_WIDGET_NORMAL_SHADOW; break;
+        case SWT.COLOR_WIDGET_LIGHT_SHADOW:                 gdkColor = COLOR_WIDGET_LIGHT_SHADOW; break;
+        case SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW:             gdkColor = COLOR_WIDGET_HIGHLIGHT_SHADOW; break;
+        case SWT.COLOR_WIDGET_BACKGROUND:                   gdkColor = COLOR_WIDGET_BACKGROUND; break;
+        case SWT.COLOR_WIDGET_FOREGROUND:                   gdkColor = COLOR_WIDGET_FOREGROUND; break;
+        case SWT.COLOR_WIDGET_BORDER:                       gdkColor = COLOR_WIDGET_BORDER; break;
+        case SWT.COLOR_LIST_FOREGROUND:                     gdkColor = COLOR_LIST_FOREGROUND; break;
+        case SWT.COLOR_LIST_BACKGROUND:                     gdkColor = COLOR_LIST_BACKGROUND; break;
+        case SWT.COLOR_LIST_SELECTION:                      gdkColor = COLOR_LIST_SELECTION; break;
+        case SWT.COLOR_LIST_SELECTION_TEXT:                 gdkColor = COLOR_LIST_SELECTION_TEXT; break;
+        default:
+            return super.getSystemColor (id);
+    }
+    if (gdkColor is null) return super.getSystemColor (SWT.COLOR_BLACK);
+    return Color.gtk_new (this, gdkColor);
+}
+
+/**
+ * Returns the matching standard platform cursor for the given
+ * constant, which should be one of the cursor constants
+ * specified in class <code>SWT</code>. This cursor should
+ * not be free'd because it was allocated by the system,
+ * not the application.  A value of <code>null</code> will
+ * be returned if the supplied constant is not an SWT cursor
+ * constant.
+ *
+ * @param id the SWT cursor constant
+ * @return the corresponding cursor or <code>null</code>
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see SWT#CURSOR_ARROW
+ * @see SWT#CURSOR_WAIT
+ * @see SWT#CURSOR_CROSS
+ * @see SWT#CURSOR_APPSTARTING
+ * @see SWT#CURSOR_HELP
+ * @see SWT#CURSOR_SIZEALL
+ * @see SWT#CURSOR_SIZENESW
+ * @see SWT#CURSOR_SIZENS
+ * @see SWT#CURSOR_SIZENWSE
+ * @see SWT#CURSOR_SIZEWE
+ * @see SWT#CURSOR_SIZEN
+ * @see SWT#CURSOR_SIZES
+ * @see SWT#CURSOR_SIZEE
+ * @see SWT#CURSOR_SIZEW
+ * @see SWT#CURSOR_SIZENE
+ * @see SWT#CURSOR_SIZESE
+ * @see SWT#CURSOR_SIZESW
+ * @see SWT#CURSOR_SIZENW
+ * @see SWT#CURSOR_UPARROW
+ * @see SWT#CURSOR_IBEAM
+ * @see SWT#CURSOR_NO
+ * @see SWT#CURSOR_HAND
+ *
+ * @since 3.0
+ */
+public Cursor getSystemCursor (int id) {
+    checkDevice ();
+    if (!(0 <= id && id < cursors.length)) return null;
+    if (cursors [id] is null) {
+        cursors [id] = new Cursor (this, id);
+    }
+    return cursors [id];
+}
+
+/**
+ * Returns the matching standard platform image for the given
+ * constant, which should be one of the icon constants
+ * specified in class <code>SWT</code>. This image should
+ * not be free'd because it was allocated by the system,
+ * not the application.  A value of <code>null</code> will
+ * be returned either if the supplied constant is not an
+ * SWT icon constant or if the platform does not define an
+ * image that corresponds to the constant.
+ *
+ * @param id the SWT icon constant
+ * @return the corresponding image or <code>null</code>
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see SWT#ICON_ERROR
+ * @see SWT#ICON_INFORMATION
+ * @see SWT#ICON_QUESTION
+ * @see SWT#ICON_WARNING
+ * @see SWT#ICON_WORKING
+ *
+ * @since 3.0
+ */
+public Image getSystemImage (int id) {
+    checkDevice ();
+    switch (id) {
+        case SWT.ICON_ERROR:
+            if (errorImage is null) {
+                errorImage = createImage ("gtk-dialog-error"); //$NON-NLS-1$
+            }
+            return errorImage;
+        case SWT.ICON_INFORMATION:
+        case SWT.ICON_WORKING:
+            if (infoImage is null) {
+                infoImage = createImage ("gtk-dialog-info"); //$NON-NLS-1$
+            }
+            return infoImage;
+        case SWT.ICON_QUESTION:
+            if (questionImage is null) {
+                questionImage = createImage ("gtk-dialog-question"); //$NON-NLS-1$
+            }
+            return questionImage;
+        case SWT.ICON_WARNING:
+            if (warningImage is null) {
+                warningImage = createImage ("gtk-dialog-warning"); //$NON-NLS-1$
+            }
+            return warningImage;
+        default:
+    }
+    return null;
+}
+
+void initializeSystemColors () {
+    GdkColor* gdkColor;
+
+    /* Get Tooltip resources */
+    auto tooltipShellHandle = OS.gtk_window_new (OS.GTK_WINDOW_POPUP);
+    if (tooltipShellHandle is null) SWT.error (SWT.ERROR_NO_HANDLES);
+//  byte[] gtk_tooltips = Converter.wcsToMbcs (null, "gtk-tooltips", true);
+    OS.gtk_widget_set_name (tooltipShellHandle, "gtk-tooltips".ptr );
+    OS.gtk_widget_realize (tooltipShellHandle);
+    auto tooltipStyle = OS.gtk_widget_get_style (tooltipShellHandle);
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_fg (tooltipStyle, OS.GTK_STATE_NORMAL, gdkColor);
+    COLOR_INFO_FOREGROUND = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_bg (tooltipStyle, OS.GTK_STATE_NORMAL, gdkColor);
+    COLOR_INFO_BACKGROUND = gdkColor;
+    OS.gtk_widget_destroy (tooltipShellHandle);
+
+    /* Get Shell resources */
+    auto style = OS.gtk_widget_get_style (shellHandle);
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_black (style, gdkColor);
+    COLOR_WIDGET_DARK_SHADOW = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_dark (style, OS.GTK_STATE_NORMAL, gdkColor);
+    COLOR_WIDGET_NORMAL_SHADOW = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_bg (style, OS.GTK_STATE_NORMAL, gdkColor);
+    COLOR_WIDGET_LIGHT_SHADOW = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_light (style, OS.GTK_STATE_NORMAL, gdkColor);
+    COLOR_WIDGET_HIGHLIGHT_SHADOW = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_fg (style, OS.GTK_STATE_NORMAL, gdkColor);
+    COLOR_WIDGET_FOREGROUND = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_bg (style, OS.GTK_STATE_NORMAL, gdkColor);
+    COLOR_WIDGET_BACKGROUND = gdkColor;
+    //gdkColor = new GdkColor();
+    //OS.gtk_style_get_text (style, OS.GTK_STATE_NORMAL, gdkColor);
+    //COLOR_TEXT_FOREGROUND = gdkColor;
+    //gdkColor = new GdkColor();
+    //OS.gtk_style_get_base (style, OS.GTK_STATE_NORMAL, gdkColor);
+    //COLOR_TEXT_BACKGROUND = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_text (style, OS.GTK_STATE_NORMAL, gdkColor);
+    COLOR_LIST_FOREGROUND = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_base (style, OS.GTK_STATE_NORMAL, gdkColor);
+    COLOR_LIST_BACKGROUND = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_text (style, OS.GTK_STATE_SELECTED, gdkColor);
+    COLOR_LIST_SELECTION_TEXT = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_base (style, OS.GTK_STATE_SELECTED, gdkColor);
+    COLOR_LIST_SELECTION = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_bg (style, OS.GTK_STATE_SELECTED, gdkColor);
+    COLOR_TITLE_BACKGROUND = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_fg (style, OS.GTK_STATE_SELECTED, gdkColor);
+    COLOR_TITLE_FOREGROUND = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_light (style, OS.GTK_STATE_SELECTED, gdkColor);
+    COLOR_TITLE_BACKGROUND_GRADIENT = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_bg (style, OS.GTK_STATE_INSENSITIVE, gdkColor);
+    COLOR_TITLE_INACTIVE_BACKGROUND = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_fg (style, OS.GTK_STATE_INSENSITIVE, gdkColor);
+    COLOR_TITLE_INACTIVE_FOREGROUND = gdkColor;
+    gdkColor = new GdkColor();
+    OS.gtk_style_get_light (style, OS.GTK_STATE_INSENSITIVE, gdkColor);
+    COLOR_TITLE_INACTIVE_BACKGROUND_GRADIENT = gdkColor;
+}
+
+/**
+ * Returns a reasonable font for applications to use.
+ * On some platforms, this will match the "default font"
+ * or "system font" if such can be found.  This font
+ * should not be free'd because it was allocated by the
+ * system, not the application.
+ * <p>
+ * Typically, applications which want the default look
+ * should simply not set the font on the widgets they
+ * create. Widgets are always created with the correct
+ * default font for the class of user-interface component
+ * they represent.
+ * </p>
+ *
+ * @return a font
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public override Font getSystemFont () {
+    checkDevice ();
+    if (systemFont !is null) return systemFont;
+    auto style = OS.gtk_widget_get_style (shellHandle);
+    auto defaultFont = OS.pango_font_description_copy (OS.gtk_style_get_font_desc (style));
+    return systemFont = Font.gtk_new (this, defaultFont);
+}
+
+/**
+ * Returns the single instance of the system tray or null
+ * when there is no system tray available for the platform.
+ *
+ * @return the system tray or <code>null</code>
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.0
+ */
+public Tray getSystemTray () {
+    checkDevice ();
+    if (tray !is null) return tray;
+    return tray = new Tray (this, SWT.NONE);
+}
+
+/**
+ * Returns the user-interface thread for the receiver.
+ *
+ * @return the receiver's user-interface thread
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Thread getThread () {
+    synchronized (Device.classinfo) {
+        if (isDisposed ()) error (SWT.ERROR_DEVICE_DISPOSED);
+        return thread;
+    }
+}
+
+Widget getWidget (GtkWidget* handle) {
+    if (handle is null) return null;
+    if (lastWidget !is null && lastHandle is handle) return lastWidget;
+    auto index = cast(int) OS.g_object_get_qdata ( cast(GObject*)handle, SWT_OBJECT_INDEX) - 1;
+    if (0 <= index && index < widgetTable.length) {
+        lastHandle = handle;
+        return lastWidget = widgetTable [cast(int)/*64*/index];
+    }
+    return null;
+}
+
+private static extern(C) int idleProcFunc (void* data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    auto dbdata = cast(CallbackData*)data;
+    return dbdata.display.idleProc();
+}
+private int idleProc () {
+    bool result = runAsyncMessages (false);
+    if (!result) {
+        synchronized (idleLock) {
+            idleHandle = 0;
+        }
+    }
+    return result ? 1 : 0;
+    return 0;
+}
+
+/**
+ * Initializes any internal resources needed by the
+ * device.
+ * <p>
+ * This method is called after <code>create</code>.
+ * </p>
+ *
+ * @see #create
+ */
+protected override void init_ () {
+    super.init_ ();
+    initializeCallbacks ();
+    initializeSystemColors ();
+    initializeSystemSettings ();
+    initializeWidgetTable ();
+    initializeWindowManager ();
+}
+
+void initializeCallbacks () {
+    closures = new GClosure* [Widget.LAST_SIGNAL];
+    signalIds = new int [Widget.LAST_SIGNAL];
+
+    /* Cache signals for GtkWidget */
+    signalIds [Widget.BUTTON_PRESS_EVENT] = OS.g_signal_lookup (OS.button_press_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.BUTTON_RELEASE_EVENT] = OS.g_signal_lookup (OS.button_release_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.CONFIGURE_EVENT] = OS.g_signal_lookup (OS.configure_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.DELETE_EVENT] = OS.g_signal_lookup (OS.delete_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.ENTER_NOTIFY_EVENT] = OS.g_signal_lookup (OS.enter_notify_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.EVENT] = OS.g_signal_lookup (OS.event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.EVENT_AFTER] = OS.g_signal_lookup (OS.event_after.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.EXPOSE_EVENT] = OS.g_signal_lookup (OS.expose_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.FOCUS] = OS.g_signal_lookup (OS.focus.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.FOCUS_IN_EVENT] = OS.g_signal_lookup (OS.focus_in_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.FOCUS_OUT_EVENT] = OS.g_signal_lookup (OS.focus_out_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.GRAB_FOCUS] = OS.g_signal_lookup (OS.grab_focus.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.HIDE] = OS.g_signal_lookup (OS.hide.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.KEY_PRESS_EVENT] = OS.g_signal_lookup (OS.key_press_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.KEY_RELEASE_EVENT] = OS.g_signal_lookup (OS.key_release_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.LEAVE_NOTIFY_EVENT] = OS.g_signal_lookup (OS.leave_notify_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.MAP] = OS.g_signal_lookup (OS.map.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.MAP_EVENT] = OS.g_signal_lookup (OS.map_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.MNEMONIC_ACTIVATE] = OS.g_signal_lookup (OS.mnemonic_activate.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.MOTION_NOTIFY_EVENT] = OS.g_signal_lookup (OS.motion_notify_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.POPUP_MENU] = OS.g_signal_lookup (OS.popup_menu.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.REALIZE] = OS.g_signal_lookup (OS.realize.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.SCROLL_EVENT] = OS.g_signal_lookup (OS.scroll_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.SHOW] = OS.g_signal_lookup (OS.show.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.SHOW_HELP] = OS.g_signal_lookup (OS.show_help.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.SIZE_ALLOCATE] = OS.g_signal_lookup (OS.size_allocate.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.STYLE_SET] = OS.g_signal_lookup (OS.style_set.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.UNMAP] = OS.g_signal_lookup (OS.unmap.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.UNMAP_EVENT] = OS.g_signal_lookup (OS.unmap_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.UNREALIZE] = OS.g_signal_lookup (OS.realize.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.VISIBILITY_NOTIFY_EVENT] = OS.g_signal_lookup (OS.visibility_notify_event.ptr, OS.GTK_TYPE_WIDGET ());
+    signalIds [Widget.WINDOW_STATE_EVENT] = OS.g_signal_lookup (OS.window_state_event.ptr, OS.GTK_TYPE_WIDGET ());
+
+    GClosure* do_cclosure_new( GCallback cb, int value, int notify ){
+        CallbackData* res= new CallbackData;
+        res.display = this;
+        res.data = cast(void*)value;
+        windowProcCallbackDatas[ value ] = res;
+        return OS.g_cclosure_new( cb, cast(void*)res, cast(GClosureNotify)notify );
+    }
+
+    GCallback windowProc2 = cast(GCallback)&windowProcFunc2;
+    closures [Widget.ACTIVATE] = do_cclosure_new (windowProc2, Widget.ACTIVATE, 0);
+    closures [Widget.ACTIVATE_INVERSE] = do_cclosure_new (windowProc2, Widget.ACTIVATE_INVERSE, 0);
+    closures [Widget.CHANGED] = do_cclosure_new (windowProc2, Widget.CHANGED, 0);
+    closures [Widget.CLICKED] = do_cclosure_new (windowProc2, Widget.CLICKED, 0);
+    closures [Widget.DAY_SELECTED] = do_cclosure_new (windowProc2, Widget.DAY_SELECTED, 0);
+    closures [Widget.HIDE] = do_cclosure_new (windowProc2, Widget.HIDE, 0);
+    closures [Widget.GRAB_FOCUS] = do_cclosure_new (windowProc2, Widget.GRAB_FOCUS, 0);
+    closures [Widget.MAP] = do_cclosure_new (windowProc2, Widget.MAP, 0);
+    closures [Widget.MONTH_CHANGED] = do_cclosure_new (windowProc2, Widget.MONTH_CHANGED, 0);
+    closures [Widget.OUTPUT] = do_cclosure_new (windowProc2, Widget.OUTPUT, 0);
+    closures [Widget.POPUP_MENU] = do_cclosure_new (windowProc2, Widget.POPUP_MENU, 0);
+    closures [Widget.PREEDIT_CHANGED] = do_cclosure_new (windowProc2, Widget.PREEDIT_CHANGED, 0);
+    closures [Widget.REALIZE] = do_cclosure_new (windowProc2, Widget.REALIZE, 0);
+    closures [Widget.SELECT] = do_cclosure_new (windowProc2, Widget.SELECT, 0);
+    closures [Widget.SHOW] = do_cclosure_new (windowProc2, Widget.SHOW, 0);
+    closures [Widget.VALUE_CHANGED] = do_cclosure_new (windowProc2, Widget.VALUE_CHANGED, 0);
+    closures [Widget.UNMAP] = do_cclosure_new (windowProc2, Widget.UNMAP, 0);
+    closures [Widget.UNREALIZE] = do_cclosure_new (windowProc2, Widget.UNREALIZE, 0);
+
+    GCallback windowProc3 = cast(GCallback)&windowProcFunc3;
+    closures [Widget.BUTTON_PRESS_EVENT] = do_cclosure_new (windowProc3, Widget.BUTTON_PRESS_EVENT, 0);
+    closures [Widget.BUTTON_PRESS_EVENT_INVERSE] = do_cclosure_new (windowProc3, Widget.BUTTON_PRESS_EVENT_INVERSE, 0);
+    closures [Widget.BUTTON_RELEASE_EVENT] = do_cclosure_new (windowProc3, Widget.BUTTON_RELEASE_EVENT, 0);
+    closures [Widget.BUTTON_RELEASE_EVENT_INVERSE] = do_cclosure_new (windowProc3, Widget.BUTTON_RELEASE_EVENT_INVERSE, 0);
+    closures [Widget.COMMIT] = do_cclosure_new (windowProc3, Widget.COMMIT, 0);
+    closures [Widget.CONFIGURE_EVENT] = do_cclosure_new (windowProc3, Widget.CONFIGURE_EVENT, 0);
+    closures [Widget.DELETE_EVENT] = do_cclosure_new (windowProc3, Widget.DELETE_EVENT, 0);
+    closures [Widget.ENTER_NOTIFY_EVENT] = do_cclosure_new (windowProc3, Widget.ENTER_NOTIFY_EVENT, 0);
+    closures [Widget.EVENT] = do_cclosure_new (windowProc3, Widget.EVENT, 0);
+    closures [Widget.EVENT_AFTER] = do_cclosure_new (windowProc3, Widget.EVENT_AFTER, 0);
+    closures [Widget.EXPOSE_EVENT] = do_cclosure_new (windowProc3, Widget.EXPOSE_EVENT, 0);
+    closures [Widget.EXPOSE_EVENT_INVERSE] = do_cclosure_new (windowProc3, Widget.EXPOSE_EVENT_INVERSE, 0);
+    closures [Widget.FOCUS] = do_cclosure_new (windowProc3, Widget.FOCUS, 0);
+    closures [Widget.FOCUS_IN_EVENT] = do_cclosure_new (windowProc3, Widget.FOCUS_IN_EVENT, 0);
+    closures [Widget.FOCUS_OUT_EVENT] = do_cclosure_new (windowProc3, Widget.FOCUS_OUT_EVENT, 0);
+    closures [Widget.KEY_PRESS_EVENT] = do_cclosure_new (windowProc3, Widget.KEY_PRESS_EVENT, 0);
+    closures [Widget.KEY_RELEASE_EVENT] = do_cclosure_new (windowProc3, Widget.KEY_RELEASE_EVENT, 0);
+    closures [Widget.INPUT] = do_cclosure_new (windowProc3, Widget.INPUT, 0);
+    closures [Widget.LEAVE_NOTIFY_EVENT] = do_cclosure_new (windowProc3, Widget.LEAVE_NOTIFY_EVENT, 0);
+    closures [Widget.MAP_EVENT] = do_cclosure_new (windowProc3, Widget.MAP_EVENT, 0);
+    closures [Widget.MNEMONIC_ACTIVATE] = do_cclosure_new (windowProc3, Widget.MNEMONIC_ACTIVATE, 0);
+    closures [Widget.MOTION_NOTIFY_EVENT] = do_cclosure_new (windowProc3, Widget.MOTION_NOTIFY_EVENT, 0);
+    closures [Widget.MOTION_NOTIFY_EVENT_INVERSE] = do_cclosure_new (windowProc3, Widget.MOTION_NOTIFY_EVENT_INVERSE, 0);
+    closures [Widget.MOVE_FOCUS] = do_cclosure_new (windowProc3, Widget.MOVE_FOCUS, 0);
+    closures [Widget.POPULATE_POPUP] = do_cclosure_new (windowProc3, Widget.POPULATE_POPUP, 0);
+    closures [Widget.SCROLL_EVENT] = do_cclosure_new (windowProc3, Widget.SCROLL_EVENT, 0);
+    closures [Widget.SHOW_HELP] = do_cclosure_new (windowProc3, Widget.SHOW_HELP, 0);
+    closures [Widget.SIZE_ALLOCATE] = do_cclosure_new (windowProc3, Widget.SIZE_ALLOCATE, 0);
+    closures [Widget.STYLE_SET] = do_cclosure_new (windowProc3, Widget.STYLE_SET, 0);
+    closures [Widget.TOGGLED] = do_cclosure_new (windowProc3, Widget.TOGGLED, 0);
+    closures [Widget.UNMAP_EVENT] = do_cclosure_new (windowProc3, Widget.UNMAP_EVENT, 0);
+    closures [Widget.VISIBILITY_NOTIFY_EVENT] = do_cclosure_new (windowProc3, Widget.VISIBILITY_NOTIFY_EVENT, 0);
+    closures [Widget.WINDOW_STATE_EVENT] = do_cclosure_new (windowProc3, Widget.WINDOW_STATE_EVENT, 0);
+
+    GCallback windowProc4 = cast(GCallback)&windowProcFunc4;
+    closures [Widget.DELETE_RANGE] = do_cclosure_new (windowProc4, Widget.DELETE_RANGE, 0);
+    closures [Widget.DELETE_TEXT] = do_cclosure_new (windowProc4, Widget.DELETE_TEXT, 0);
+    closures [Widget.ROW_ACTIVATED] = do_cclosure_new (windowProc4, Widget.ROW_ACTIVATED, 0);
+    closures [Widget.SCROLL_CHILD] = do_cclosure_new (windowProc4, Widget.SCROLL_CHILD, 0);
+    closures [Widget.SWITCH_PAGE] = do_cclosure_new (windowProc4, Widget.SWITCH_PAGE, 0);
+    closures [Widget.TEST_COLLAPSE_ROW] = do_cclosure_new (windowProc4, Widget.TEST_COLLAPSE_ROW, 0);
+    closures [Widget.TEST_EXPAND_ROW] = do_cclosure_new (windowProc4, Widget.TEST_EXPAND_ROW, 0);
+
+    GCallback windowProc5 = cast(GCallback)&windowProcFunc5;
+    closures [Widget.CHANGE_VALUE] = do_cclosure_new (windowProc5, Widget.CHANGE_VALUE, 0);
+    closures [Widget.EXPAND_COLLAPSE_CURSOR_ROW] = do_cclosure_new (windowProc5, Widget.EXPAND_COLLAPSE_CURSOR_ROW, 0);
+    closures [Widget.INSERT_TEXT] = do_cclosure_new (windowProc5, Widget.INSERT_TEXT, 0);
+    closures [Widget.TEXT_BUFFER_INSERT_TEXT] = do_cclosure_new (windowProc5, Widget.TEXT_BUFFER_INSERT_TEXT, 0);
+
+    for (int i = 0; i < Widget.LAST_SIGNAL; i++) {
+        if (closures [i] !is null) OS.g_closure_ref (closures [i]);
+    }
+    shellMapProcCallbackData.display = this;
+    shellMapProcCallbackData.data = null;
+    shellMapProcClosure = OS.g_cclosure_new (cast(GCallback)&shellMapProcFunc, &shellMapProcCallbackData, cast(GClosureNotify)0);
+    OS.g_closure_ref (shellMapProcClosure);
+}
+
+void* getWindowProcUserData( int value ){
+    return windowProcCallbackDatas[ value ];
+
+}
+
+void initializeSystemSettings () {
+    styleSetProcCallbackData.display = this;
+    styleSetProcCallbackData.data = null;
+    OS.g_signal_connect (shellHandle, OS.style_set.ptr, cast(GCallback)&styleSetProcFunc, &styleSetProcCallbackData);
+
+    /*
+    * Feature in GTK.  Despite the fact that the
+    * gtk-entry-select-on-focus property is a global
+    * setting, it is initialized when the GtkEntry
+    * is initialized.  This means that it cannot be
+    * accessed before a GtkEntry is created.  The
+    * fix is to for the initializaion by creating
+    * a temporary GtkEntry.
+    */
+    auto entry = OS.gtk_entry_new ();
+    OS.gtk_widget_destroy (entry);
+    int buffer2;
+    auto settings = OS.gtk_settings_get_default ();
+    OS.g_object_get1 (settings, OS.gtk_entry_select_on_focus.ptr, &buffer2);
+    entrySelectOnFocus = buffer2 !is 0;
+}
+
+void initializeWidgetTable () {
+    indexTable = new int [GROW_SIZE];
+    widgetTable = new Widget [GROW_SIZE];
+    for (int i=0; i<GROW_SIZE-1; i++) indexTable [i] = i + 1;
+    indexTable [GROW_SIZE - 1] = -1;
+}
+
+void initializeWindowManager () {
+    /* Get the window manager name */
+    windowManager = ""; //$NON-NLS-1$
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 2, 0)) {
+        auto screen = OS.gdk_screen_get_default ();
+        if (screen !is null) {
+            auto ptr2 = OS.gdk_x11_screen_get_window_manager_name (screen);
+            windowManager = fromStringz( ptr2 );
+        }
+    }
+}
+
+/**
+ * Invokes platform specific functionality to dispose a GC handle.
+ * <p>
+ * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
+ * API for <code>Display</code>. It is marked public only so that it
+ * can be shared within the packages provided by SWT. It is not
+ * available on all platforms, and should never be called from
+ * application code.
+ * </p>
+ *
+ * @param hDC the platform specific GC handle
+ * @param data the platform specific GC data
+ */
+public override void internal_dispose_GC (GdkGC* gdkGC, GCData data) {
+    OS.g_object_unref (gdkGC);
+}
+
+/**
+ * Invokes platform specific functionality to allocate a new GC handle.
+ * <p>
+ * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
+ * API for <code>Display</code>. It is marked public only so that it
+ * can be shared within the packages provided by SWT. It is not
+ * available on all platforms, and should never be called from
+ * application code.
+ * </p>
+ *
+ * @param data the platform specific GC data
+ * @return the platform specific GC handle
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ * @exception SWTError <ul>
+ *    <li>ERROR_NO_HANDLES if a handle could not be obtained for gc creation</li>
+ * </ul>
+ */
+public override GdkGC* internal_new_GC (GCData data) {
+    if (isDisposed()) SWT.error(SWT.ERROR_DEVICE_DISPOSED);
+    auto root = cast(GdkDrawable *) OS.GDK_ROOT_PARENT ();
+    auto gdkGC = OS.gdk_gc_new (root);
+    if (gdkGC is null) SWT.error (SWT.ERROR_NO_HANDLES);
+    OS.gdk_gc_set_subwindow (gdkGC, OS.GDK_INCLUDE_INFERIORS);
+    if (data !is null) {
+        int mask = SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT;
+        if ((data.style & mask) is 0) {
+            data.style |= SWT.LEFT_TO_RIGHT;
+        }
+        data.device = this;
+        data.drawable = root;
+        data.background = getSystemColor (SWT.COLOR_WHITE).handle;
+        data.foreground = getSystemColor (SWT.COLOR_BLACK).handle;
+        data.font = getSystemFont ();
+    }
+    return gdkGC;
+    return null;
+}
+
+bool isValidThread () {
+    return thread is Thread.getThis ();
+}
+
+/**
+ * Maps a point from one coordinate system to another.
+ * When the control is null, coordinates are mapped to
+ * the display.
+ * <p>
+ * NOTE: On right-to-left platforms where the coordinate
+ * systems are mirrored, special care needs to be taken
+ * when mapping coordinates from one control to another
+ * to ensure the result is correctly mirrored.
+ *
+ * Mapping a point that is the origin of a rectangle and
+ * then adding the width and height is not equivalent to
+ * mapping the rectangle.  When one control is mirrored
+ * and the other is not, adding the width and height to a
+ * point that was mapped causes the rectangle to extend
+ * in the wrong direction.  Mapping the entire rectangle
+ * instead of just one point causes both the origin and
+ * the corner of the rectangle to be mapped.
+ * </p>
+ *
+ * @param from the source <code>Control</code> or <code>null</code>
+ * @param to the destination <code>Control</code> or <code>null</code>
+ * @param point to be mapped
+ * @return point with mapped coordinates
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the point is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the Control from or the Control to have been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 2.1.2
+ */
+public Point map (Control from, Control to, Point point) {
+    checkDevice ();
+    if (point is null) error (SWT.ERROR_NULL_ARGUMENT);
+    return map (from, to, point.x, point.y);
+}
+
+/**
+ * Maps a point from one coordinate system to another.
+ * When the control is null, coordinates are mapped to
+ * the display.
+ * <p>
+ * NOTE: On right-to-left platforms where the coordinate
+ * systems are mirrored, special care needs to be taken
+ * when mapping coordinates from one control to another
+ * to ensure the result is correctly mirrored.
+ *
+ * Mapping a point that is the origin of a rectangle and
+ * then adding the width and height is not equivalent to
+ * mapping the rectangle.  When one control is mirrored
+ * and the other is not, adding the width and height to a
+ * point that was mapped causes the rectangle to extend
+ * in the wrong direction.  Mapping the entire rectangle
+ * instead of just one point causes both the origin and
+ * the corner of the rectangle to be mapped.
+ * </p>
+ *
+ * @param from the source <code>Control</code> or <code>null</code>
+ * @param to the destination <code>Control</code> or <code>null</code>
+ * @param x coordinates to be mapped
+ * @param y coordinates to be mapped
+ * @return point with mapped coordinates
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the Control from or the Control to have been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 2.1.2
+ */
+public Point map (Control from, Control to, int x, int y) {
+    checkDevice ();
+    if (from !is null && from.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT);
+    if (to !is null && to.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT);
+    Point point = new Point (x, y);
+    if (from is to) return point;
+    if (from !is null) {
+        auto window = from.eventWindow ();
+        int origin_x, origin_y;
+        OS.gdk_window_get_origin (window, &origin_x, &origin_y);
+        if ((from.style & SWT.MIRRORED) !is 0) point.x = from.getClientWidth () - point.x;
+        point.x += origin_x;
+        point.y += origin_y;
+    }
+    if (to !is null) {
+        auto window = to.eventWindow ();
+        int origin_x, origin_y;
+        OS.gdk_window_get_origin (window, &origin_x, &origin_y);
+        point.x -= origin_x;
+        point.y -= origin_y;
+        if ((to.style & SWT.MIRRORED) !is 0) point.x = to.getClientWidth () - point.x;
+    }
+    return point;
+}
+
+/**
+ * Maps a point from one coordinate system to another.
+ * When the control is null, coordinates are mapped to
+ * the display.
+ * <p>
+ * NOTE: On right-to-left platforms where the coordinate
+ * systems are mirrored, special care needs to be taken
+ * when mapping coordinates from one control to another
+ * to ensure the result is correctly mirrored.
+ *
+ * Mapping a point that is the origin of a rectangle and
+ * then adding the width and height is not equivalent to
+ * mapping the rectangle.  When one control is mirrored
+ * and the other is not, adding the width and height to a
+ * point that was mapped causes the rectangle to extend
+ * in the wrong direction.  Mapping the entire rectangle
+ * instead of just one point causes both the origin and
+ * the corner of the rectangle to be mapped.
+ * </p>
+ *
+ * @param from the source <code>Control</code> or <code>null</code>
+ * @param to the destination <code>Control</code> or <code>null</code>
+ * @param rectangle to be mapped
+ * @return rectangle with mapped coordinates
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the rectangle is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the Control from or the Control to have been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 2.1.2
+ */
+public Rectangle map (Control from, Control to, Rectangle rectangle) {
+    checkDevice();
+    if (rectangle is null) error (SWT.ERROR_NULL_ARGUMENT);
+    return map (from, to, rectangle.x, rectangle.y, rectangle.width, rectangle.height);
+}
+
+static wchar mbcsToWcs (wchar ch) {
+    int key = ch & 0xFFFF;
+    if (key <= 0x7F) return ch;
+    char [] buffer;
+    if (key <= 0xFF) {
+        buffer = new char [1];
+        buffer [0] = cast(char) key;
+    } else {
+        buffer = new char [2];
+        buffer [0] = cast(char) ((key >> 8) & 0xFF);
+        buffer [1] = cast(char) (key & 0xFF);
+    }
+    wchar [] result = Converter.mbcsToWcs (null, buffer);
+    if (result.length is 0) return 0;
+    return result [0];
+}
+
+
+package void doMenuPositionProc( GtkMenu* window, bool hasLocation ){
+    /*
+    * Bug in GTK.  The timestamp passed into gtk_menu_popup is used
+    * to perform an X pointer grab.  It cannot be zero, else the grab
+    * will fail.  The fix is to ensure that the timestamp of the last
+    * event processed is used.
+    */
+    OS.gtk_menu_popup (window, null, null,
+        hasLocation ? &menuPositionProcFunc : null,
+        cast(void*)this, 0, getLastEventTime() );
+}
+
+private static extern(C) void menuPositionProcFunc (GtkMenu* menu, int* x, int* y, int* push_in, void* user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    auto display = cast(Display)user_data;
+    display.menuPositionProc( menu, x, y, push_in, null );
+}
+
+void menuPositionProc (GtkMenu* menu, int* x, int* y, int* push_in, void* user_data) {
+    Widget widget = getWidget (cast(GtkWidget*)menu);
+    if (widget is null) return 0;
+    widget.menuPositionProc (menu, x, y, push_in, user_data);
+}
+
+/**
+ * Maps a point from one coordinate system to another.
+ * When the control is null, coordinates are mapped to
+ * the display.
+ * <p>
+ * NOTE: On right-to-left platforms where the coordinate
+ * systems are mirrored, special care needs to be taken
+ * when mapping coordinates from one control to another
+ * to ensure the result is correctly mirrored.
+ *
+ * Mapping a point that is the origin of a rectangle and
+ * then adding the width and height is not equivalent to
+ * mapping the rectangle.  When one control is mirrored
+ * and the other is not, adding the width and height to a
+ * point that was mapped causes the rectangle to extend
+ * in the wrong direction.  Mapping the entire rectangle
+ * instead of just one point causes both the origin and
+ * the corner of the rectangle to be mapped.
+ * </p>
+ *
+ * @param from the source <code>Control</code> or <code>null</code>
+ * @param to the destination <code>Control</code> or <code>null</code>
+ * @param x coordinates to be mapped
+ * @param y coordinates to be mapped
+ * @param width coordinates to be mapped
+ * @param height coordinates to be mapped
+ * @return rectangle with mapped coordinates
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the Control from or the Control to have been disposed</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 2.1.2
+ */
+public Rectangle map (Control from, Control to, int x, int y, int width, int height) {
+    checkDevice();
+    if (from !is null && from.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT);
+    if (to !is null && to.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT);
+    Rectangle rect = new Rectangle (x, y, width, height);
+    if (from is to) return rect;
+    bool fromRTL = false, toRTL = false;
+    if (from !is null) {
+        auto window = from.eventWindow ();
+        int origin_x, origin_y;
+        OS.gdk_window_get_origin (window, &origin_x, &origin_y);
+        fromRTL = (from.style & SWT.MIRRORED) !is 0;
+        if (fromRTL) rect.x = from.getClientWidth() - rect.x;
+        rect.x += origin_x;
+        rect.y += origin_y;
+    }
+    if (to !is null) {
+        auto window = to.eventWindow ();
+        int origin_x, origin_y;
+        OS.gdk_window_get_origin (window, &origin_x, &origin_y);
+        rect.x -= origin_x;
+        rect.y -= origin_y;
+        toRTL = (to.style & SWT.MIRRORED) !is 0;
+        if (toRTL) rect.x = to.getClientWidth () - rect.x;
+    }
+    if (fromRTL !is toRTL) rect.x -= rect.width;
+    return rect;
+}
+
+private static extern(C) int /*long*/ mouseHoverProcFunc ( void* user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    CallbackData* cbdata = cast(CallbackData*)user_data;
+    return cbdata.display.mouseHoverProc( cast(GtkWidget*)cbdata.data );
+}
+int /*long*/ mouseHoverProc (GtkWidget* handle) {
+    Widget widget = getWidget (handle);
+    if (widget is null) return 0;
+    return widget.hoverProc (handle);
+}
+
+/**
+ * Generate a low level system event.
+ *
+ * <code>post</code> is used to generate low level keyboard
+ * and mouse events. The intent is to enable automated UI
+ * testing by simulating the input from the user.  Most
+ * SWT applications should never need to call this method.
+ * <p>
+ * Note that this operation can fail when the operating system
+ * fails to generate the event for any reason.  For example,
+ * this can happen when there is no such key or mouse button
+ * or when the system event queue is full.
+ * </p>
+ * <p>
+ * <b>Event Types:</b>
+ * <p>KeyDown, KeyUp
+ * <p>The following fields in the <code>Event</code> apply:
+ * <ul>
+ * <li>(in) type KeyDown or KeyUp</li>
+ * <p> Either one of:
+ * <li>(in) character a character that corresponds to a keyboard key</li>
+ * <li>(in) keyCode the key code of the key that was typed,
+ *          as defined by the key code constants in class <code>SWT</code></li>
+ * </ul>
+ * <p>MouseDown, MouseUp</p>
+ * <p>The following fields in the <code>Event</code> apply:
+ * <ul>
+ * <li>(in) type MouseDown or MouseUp
+ * <li>(in) button the button that is pressed or released
+ * </ul>
+ * <p>MouseMove</p>
+ * <p>The following fields in the <code>Event</code> apply:
+ * <ul>
+ * <li>(in) type MouseMove
+ * <li>(in) x the x coordinate to move the mouse pointer to in screen coordinates
+ * <li>(in) y the y coordinate to move the mouse pointer to in screen coordinates
+ * </ul>
+ * </dl>
+ *
+ * @param event the event to be generated
+ *
+ * @return true if the event was generated or false otherwise
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the event is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 3.0
+ *
+ */
+public bool post (Event event) {
+    synchronized (Device.classinfo) {
+        if (isDisposed ()) error (SWT.ERROR_DEVICE_DISPOSED);
+        if (event is null) error (SWT.ERROR_NULL_ARGUMENT);
+        if (!OS.GDK_WINDOWING_X11()) return false;
+        auto xDisplay = OS.GDK_DISPLAY ();
+        int type = event.type;
+        switch (type) {
+            case SWT.KeyDown:
+            case SWT.KeyUp: {
+                int keyCode = 0;
+                auto keysym = untranslateKey (event.keyCode);
+                if (keysym !is 0) keyCode = OS.XKeysymToKeycode (xDisplay, keysym);
+                if (keyCode is 0) {
+                    char key = event.character;
+                    switch (key) {
+                        case SWT.BS: keysym = OS.GDK_BackSpace; break;
+                        case SWT.CR: keysym = OS.GDK_Return; break;
+                        case SWT.DEL: keysym = OS.GDK_Delete; break;
+                        case SWT.ESC: keysym = OS.GDK_Escape; break;
+                        case SWT.TAB: keysym = OS.GDK_Tab; break;
+                        case SWT.LF: keysym = OS.GDK_Linefeed; break;
+                        default:
+                            keysym = key;
+                    }
+                    keyCode = OS.XKeysymToKeycode (xDisplay, keysym);
+                    if (keyCode is 0) return false;
+                }
+                OS.XTestFakeKeyEvent (xDisplay, keyCode, type is SWT.KeyDown, 0);
+                return true;
+            }
+            case SWT.MouseDown:
+            case SWT.MouseMove:
+            case SWT.MouseUp: {
+                if (type is SWT.MouseMove) {
+                    OS.XTestFakeMotionEvent (xDisplay, -1, event.x, event.y, 0);
+                } else {
+                    int button = event.button;
+                    switch (button) {
+                        case 1:
+                        case 2:
+                        case 3: break;
+                        case 4: button = 6; break;
+                        case 5: button = 7; break;
+                        default: return false;
+                    }
+                    OS.XTestFakeButtonEvent (xDisplay, button, type is SWT.MouseDown, 0);
+                }
+                return true;
+        default:
+            }
+            /*
+            * This code is intentionally commented. After posting a
+            * mouse wheel event the system may respond unpredictably
+            * to subsequent mouse actions.
+            */
+//          case SWT.MouseWheel: {
+//              if (event.count is 0) return false;
+//              int button = event.count < 0 ? 5 : 4;
+//              OS.XTestFakeButtonEvent (xDisplay, button, type is SWT.MouseWheel, 0);
+//          }
+        }
+        return false;
+    }
+}
+
+void postEvent (Event event) {
+    /*
+    * Place the event at the end of the event queue.
+    * This code is always called in the Display's
+    * thread so it must be re-enterant but does not
+    * need to be synchronized.
+    */
+    if (eventQueue is null) eventQueue = new Event [4];
+    int index = 0;
+    int length = eventQueue.length;
+    while (index < length) {
+        if (eventQueue [index] is null) break;
+        index++;
+    }
+    if (index is length) {
+        Event [] newQueue = new Event [length + 4];
+        System.arraycopy (eventQueue, 0, newQueue, 0, length);
+        eventQueue = newQueue;
+    }
+    eventQueue [index] = event;
+}
+
+void putGdkEvents () {
+    if (gdkEventCount !is 0) {
+        for (int i = 0; i < gdkEventCount; i++) {
+            auto event = gdkEvents [i];
+            Widget widget = gdkEventWidgets [i];
+            if (widget is null || !widget.isDisposed ()) {
+                OS.gdk_event_put (event);
+            }
+            OS.gdk_event_free (event);
+            gdkEvents [i] = null;
+            gdkEventWidgets [i] = null;
+        }
+        gdkEventCount = 0;
+    }
+}
+
+/**
+ * Reads an event from the operating system's event queue,
+ * dispatches it appropriately, and returns <code>true</code>
+ * if there is potentially more work to do, or <code>false</code>
+ * if the caller can sleep until another event is placed on
+ * the event queue.
+ * <p>
+ * In addition to checking the system event queue, this method also
+ * checks if any inter-thread messages (created by <code>syncExec()</code>
+ * or <code>asyncExec()</code>) are waiting to be processed, and if
+ * so handles them before returning.
+ * </p>
+ *
+ * @return <code>false</code> if the caller can sleep upon return from this method
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_FAILED_EXEC - if an exception occurred while running an inter-thread message</li>
+ * </ul>
+ *
+ * @see #sleep
+ * @see #wake
+ */
+public bool readAndDispatch () {
+    checkDevice ();
+    bool events = false;
+    events |= runSettings ();
+    events |= runPopups ();
+    events |= cast(bool)OS.g_main_context_iteration (null, false);
+    if (events) {
+        runDeferredEvents ();
+        return true;
+    }
+    return runAsyncMessages (false);
+}
+
+static void register (Display display) {
+    synchronized (Device.classinfo) {
+        for (int i=0; i<Displays.length; i++) {
+            if (Displays [i] is null) {
+                Displays [i] = display;
+                return;
+            }
+        }
+        Display [] newDisplays = new Display [Displays.length + 4];
+        System.arraycopy (Displays, 0, newDisplays, 0, Displays.length);
+        newDisplays [Displays.length] = display;
+        Displays = newDisplays;
+    }
+}
+
+/**
+ * Releases any internal resources back to the operating
+ * system and clears all fields except the device handle.
+ * <p>
+ * Disposes all shells which are currently open on the display.
+ * After this method has been invoked, all related related shells
+ * will answer <code>true</code> when sent the message
+ * <code>isDisposed()</code>.
+ * </p><p>
+ * When a device is destroyed, resources that were acquired
+ * on behalf of the programmer need to be returned to the
+ * operating system.  For example, if the device allocated a
+ * font to be used as the system font, this font would be
+ * freed in <code>release</code>.  Also,to assist the garbage
+ * collector and minimize the amount of memory that is not
+ * reclaimed when the programmer keeps a reference to a
+ * disposed device, all fields except the handle are zero'd.
+ * The handle is needed by <code>destroy</code>.
+ * </p>
+ * This method is called before <code>destroy</code>.
+ *
+ * @see Device#dispose
+ * @see #destroy
+ */
+protected override void release () {
+    sendEvent (SWT.Dispose, new Event ());
+    Shell [] shells = getShells ();
+    for (int i=0; i<shells.length; i++) {
+        Shell shell = shells [i];
+        if (!shell.isDisposed ())  shell.dispose ();
+    }
+    if (tray !is null) tray.dispose ();
+    tray = null;
+    while (readAndDispatch ()) {}
+    if (disposeList !is null) {
+        for (int i=0; i<disposeList.length; i++) {
+            if (disposeList [i] !is null) disposeList [i].run ();
+        }
+    }
+    disposeList = null;
+    synchronizer.releaseSynchronizer ();
+    synchronizer = null;
+    releaseDisplay ();
+    super.release ();
+}
+
+void releaseDisplay () {
+
+    /* Dispose xfilter callback */
+    OS.gdk_window_remove_filter(null, &filterProcFunc, null);
+
+    /* Dispose checkIfEvent callback */
+
+    /* Dispose preedit window */
+    if (preeditWindow !is null) OS.gtk_widget_destroy ( &preeditWindow.bin.container.widget);
+    imControl = null;
+
+    /* Dispose the menu callback */
+
+    /* Dispose the tooltip map callback */
+
+    /* Dispose the shell map callback */
+
+    /* Dispose the run async messages callback */
+    if (idleHandle !is 0) OS.g_source_remove (idleHandle);
+    idleHandle = 0;
+
+    /* Dispose GtkTreeView callbacks */
+
+    /* Dispose the set direction callback */
+
+    /* Dispose the emission proc callback */
+
+    /* Dispose the set direction callback */
+
+    /* Dispose the caret callback */
+    if (caretId !is 0) OS.gtk_timeout_remove (caretId);
+    caretId = 0;
+
+    /* Release closures */
+    for (int i = 0; i < Widget.LAST_SIGNAL; i++) {
+        if (closures [i] !is null) OS.g_closure_unref (closures [i]);
+    }
+    if (shellMapProcClosure !is null) OS.g_closure_unref (shellMapProcClosure);
+
+    /* Dispose the timer callback */
+    if (timerIds !is null) {
+        for (int i=0; i<timerIds.length; i++) {
+            if (timerIds [i] !is 0) OS.gtk_timeout_remove (timerIds [i]);
+        }
+    }
+    timerIds = null;
+    timerList = null;
+
+    /* Dispose mouse hover callback */
+    if (mouseHoverId !is 0) OS.gtk_timeout_remove (mouseHoverId);
+    mouseHoverId = 0;
+    mouseHoverHandle = null;
+
+    /* Dispose the default font */
+    if (systemFont !is null) systemFont.dispose ();
+    systemFont = null;
+
+    /* Dispose the System Images */
+    if (errorImage !is null) errorImage.dispose();
+    if (infoImage !is null) infoImage.dispose();
+    if (questionImage !is null) questionImage.dispose();
+    if (warningImage !is null) warningImage.dispose();
+    errorImage = infoImage = questionImage = warningImage = null;
+
+    /* Release the System Cursors */
+    for (int i = 0; i < cursors.length; i++) {
+        if (cursors [i] !is null) cursors [i].dispose ();
+    }
+    cursors = null;
+
+    /* Release Acquired Resources */
+    if (resources !is null) {
+        for (int i=0; i<resources.length; i++) {
+            if (resources [i] !is null) resources [i].dispose ();
+        }
+        resources = null;
+    }
+
+    /* Release the System Colors */
+    COLOR_WIDGET_DARK_SHADOW = COLOR_WIDGET_NORMAL_SHADOW = COLOR_WIDGET_LIGHT_SHADOW =
+    COLOR_WIDGET_HIGHLIGHT_SHADOW = COLOR_WIDGET_BACKGROUND = COLOR_WIDGET_BORDER =
+    COLOR_LIST_FOREGROUND = COLOR_LIST_BACKGROUND = COLOR_LIST_SELECTION = COLOR_LIST_SELECTION_TEXT =
+    COLOR_WIDGET_FOREGROUND = COLOR_TITLE_FOREGROUND = COLOR_TITLE_BACKGROUND = COLOR_TITLE_BACKGROUND_GRADIENT =
+    COLOR_TITLE_INACTIVE_FOREGROUND = COLOR_TITLE_INACTIVE_BACKGROUND = COLOR_TITLE_INACTIVE_BACKGROUND_GRADIENT =
+    COLOR_INFO_BACKGROUND = COLOR_INFO_FOREGROUND = null;
+
+    /* Dispose the event callback */
+    OS.gdk_event_handler_set (null, null, null);
+
+    /* Dispose the hidden shell */
+    if (shellHandle !is null) OS.gtk_widget_destroy (shellHandle);
+    shellHandle = null;
+
+    /* Dispose the settings callback */
+
+    /* Release the sleep resources */
+    max_priority = 0;
+    timeout = 0;
+    if (fds !is null) OS.g_free (fds.ptr);
+    fds = null;
+
+    /* Release references */
+    popups = null;
+    thread = null;
+    lastWidget = activeShell = null;
+    //flushData = null;
+    closures = null;
+    indexTable = signalIds = treeSelection = null;
+    widgetTable = modalShells = null;
+    data = null;
+    values = null;
+    keys = null;
+    windowManager = null;
+    eventTable = filterTable = null;
+    modalDialog = null;
+    flushRect = null;
+    exposeEvent = null;
+    visibilityEvent = null;
+    idleLock = null;
+}
+
+/**
+ * Removes the listener from the collection of listeners who will
+ * be notified when an event of the given type occurs anywhere in
+ * a widget. The event type is one of the event constants defined
+ * in class <code>SWT</code>.
+ *
+ * @param eventType the type of event to listen for
+ * @param listener the listener which should no longer be notified when the event occurs
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see Listener
+ * @see SWT
+ * @see #addFilter
+ * @see #addListener
+ *
+ * @since 3.0
+ */
+public void removeFilter (int eventType, Listener listener) {
+    checkDevice ();
+    if (listener is null) error (SWT.ERROR_NULL_ARGUMENT);
+    if (filterTable is null) return;
+    filterTable.unhook (eventType, listener);
+    if (filterTable.size () is 0) filterTable = null;
+}
+
+GdkEvent* removeGdkEvent () {
+    if (gdkEventCount is 0) return null;
+    auto event = gdkEvents [0];
+    --gdkEventCount;
+    SimpleType!(GdkEvent*).arraycopy (gdkEvents, 1, gdkEvents, 0, gdkEventCount);
+    System.arraycopy (gdkEventWidgets, 1, gdkEventWidgets, 0, gdkEventCount);
+    gdkEvents [gdkEventCount] = null;
+    gdkEventWidgets [gdkEventCount] = null;
+    if (gdkEventCount is 0) {
+        gdkEvents = null;
+        gdkEventWidgets = null;
+    }
+    return event;
+}
+
+void removeIdleProc () {
+    synchronized (idleLock) {
+        if (idleHandle !is 0) OS.g_source_remove (idleHandle);
+        idleNeeded = false;
+        idleHandle = 0;
+    }
+}
+/**
+ * Removes the listener from the collection of listeners who will
+ * be notified when an event of the given type occurs. The event type
+ * is one of the event constants defined in class <code>SWT</code>.
+ *
+ * @param eventType the type of event to listen for
+ * @param listener the listener which should no longer be notified
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see Listener
+ * @see SWT
+ * @see #addListener
+ *
+ * @since 2.0
+ */
+public void removeListener (int eventType, Listener listener) {
+    checkDevice ();
+    if (listener is null) error (SWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) return;
+    eventTable.unhook (eventType, listener);
+}
+
+void removeMouseHoverTimeout (void* handle) {
+    if (handle !is mouseHoverHandle) return;
+    if (mouseHoverId !is 0) OS.gtk_timeout_remove (mouseHoverId);
+    mouseHoverId = 0;
+    mouseHoverHandle = null;
+}
+
+void removePopup (Menu menu) {
+    if (popups is null) return;
+    for (int i=0; i<popups.length; i++) {
+        if (popups [i] is menu) {
+            popups [i] = null;
+            return;
+        }
+    }
+}
+
+Widget removeWidget (GtkWidget* handle) {
+    if (handle is null) return null;
+    lastWidget = null;
+    Widget widget = null;
+    int index = cast(int)/*64*/ OS.g_object_get_qdata (cast(GObject*)handle, SWT_OBJECT_INDEX) - 1;
+    if (0 <= index && index < widgetTable.length) {
+        widget = widgetTable [index];
+        widgetTable [index] = null;
+        indexTable [index] = freeSlot;
+        freeSlot = index;
+        OS.g_object_set_qdata (cast(GObject*)handle, SWT_OBJECT_INDEX, null);
+    }
+    return widget;
+}
+
+bool runAsyncMessages (bool all) {
+    return synchronizer.runAsyncMessages (all);
+}
+
+bool runDeferredEvents () {
+    /*
+    * Run deferred events.  This code is always
+    * called in the Display's thread so it must
+    * be re-enterant but need not be synchronized.
+    */
+    while (eventQueue !is null) {
+
+        /* Take an event off the queue */
+        Event event = eventQueue [0];
+        if (event is null) break;
+        int len = eventQueue.length;
+        System.arraycopy (eventQueue, 1, eventQueue, 0, --len);
+        eventQueue [len] = null;
+
+        /* Run the event */
+        Widget widget = event.widget;
+        if (widget !is null && !widget.isDisposed ()) {
+            Widget item = event.item;
+            if (item is null || !item.isDisposed ()) {
+                widget.sendEvent (event);
+            }
+        }
+
+        /*
+        * At this point, the event queue could
+        * be null due to a recursive invokation
+        * when running the event.
+        */
+    }
+
+    /* Clear the queue */
+    eventQueue = null;
+    return true;
+}
+
+bool runPopups () {
+    if (popups is null) return false;
+    bool result = false;
+    while (popups !is null) {
+        Menu menu = popups [0];
+        if (menu is null) break;
+        int len = popups.length;
+        System.arraycopy (popups, 1, popups, 0, --len);
+        popups [len] = null;
+        runDeferredEvents ();
+        if (!menu.isDisposed ()) menu._setVisible (true);
+        result = true;
+    }
+    popups = null;
+    return result;
+}
+
+bool runSettings () {
+    if (!runSettingsFld) return false;
+    runSettingsFld = false;
+    saveResources ();
+    initializeSystemColors ();
+    sendEvent (SWT.Settings, null);
+    Shell [] shells = getShells ();
+    for (int i=0; i<shells.length; i++) {
+        Shell shell = shells [i];
+        if (!shell.isDisposed ()) {
+            shell.fixStyle ();
+            shell.redraw (true);
+            shell.layout (true, true);
+        }
+    }
+    return true;
+}
+
+/**
+ * On platforms which support it, sets the application name
+ * to be the argument. On Motif, for example, this can be used
+ * to set the name used for resource lookup.  Specifying
+ * <code>null</code> for the name clears it.
+ *
+ * @param name the new app name or <code>null</code>
+ */
+public static void setAppName (String name) {
+    APP_NAME = name;
+}
+
+/**
+ * Sets the location of the on-screen pointer relative to the top left corner
+ * of the screen.  <b>Note: It is typically considered bad practice for a
+ * program to move the on-screen pointer location.</b>
+ *
+ * @param x the new x coordinate for the cursor
+ * @param y the new y coordinate for the cursor
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 2.1
+ */
+public void setCursorLocation (int x, int y) {
+    checkDevice ();
+    if (OS.GDK_WINDOWING_X11 ()) {
+        auto xDisplay = OS.GDK_DISPLAY ();
+        auto xWindow = OS.XDefaultRootWindow (xDisplay);
+        OS.XWarpPointer (xDisplay, OS.None, xWindow, 0, 0, 0, 0, x, y);
+    }
+}
+
+/**
+ * Sets the location of the on-screen pointer relative to the top left corner
+ * of the screen.  <b>Note: It is typically considered bad practice for a
+ * program to move the on-screen pointer location.</b>
+ *
+ * @param point new position
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_NULL_ARGUMENT - if the point is null
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @since 2.0
+ */
+public void setCursorLocation (Point point) {
+    checkDevice ();
+    if (point is null) error (SWT.ERROR_NULL_ARGUMENT);
+    setCursorLocation (point.x, point.y);
+}
+
+/**
+ * Sets the application defined property of the receiver
+ * with the specified name to the given argument.
+ * <p>
+ * Applications may have associated arbitrary objects with the
+ * receiver in this fashion. If the objects stored in the
+ * properties need to be notified when the display is disposed
+ * of, it is the application's responsibility provide a
+ * <code>disposeExec()</code> handler which does so.
+ * </p>
+ *
+ * @param key the name of the property
+ * @param value the new value for the property
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #getData(String)
+ * @see #disposeExec(Runnable)
+ */
+public void setData (String key, Object value) {
+    checkDevice ();
+    // SWT extension: allow null for zero length string
+    //if (key is null) error (SWT.ERROR_NULL_ARGUMENT);
+
+    if (key.equals (DISPATCH_EVENT_KEY)) {
+        ArrayWrapperInt wrappedValue;
+        if (value is null || (null !is (wrappedValue=cast(ArrayWrapperInt)value))) {
+            dispatchEvents = wrappedValue.array;
+            if (value is null) putGdkEvents ();
+            return;
+        }
+    }
+    if (key.equals (SET_MODAL_DIALOG)) {
+        setModalDialog (cast(Dialog) data);
+        return;
+    }
+
+    if (key.equals (ADD_WIDGET_KEY)) {
+        auto wrap = cast(ArrayWrapperObject) value;
+        if( wrap is null ) SWT.error(SWT.ERROR_INVALID_ARGUMENT, null, " []");
+        Object [] data = wrap.array;
+        auto handle = (cast(LONG) data [0]).value;
+        Widget widget = cast(Widget) data [1];
+        if (widget !is null) {
+            addWidget (cast(GtkWidget*)handle, widget);
+        } else {
+            removeWidget (cast(GtkWidget*)handle);
+        }
+    }
+
+    if (key==/*eq*/ ADD_IDLE_PROC_KEY) {
+        addIdleProc ();
+        return;
+    }
+    if (key==/*eq*/ REMOVE_IDLE_PROC_KEY) {
+        removeIdleProc ();
+        return;
+    }
+
+    /* Remove the key/value pair */
+    if (value is null) {
+        if (keys is null) return;
+        int index = 0;
+        while (index < keys.length && keys [index]!=/*!eq*/ key) index++;
+        if (index is keys.length) return;
+        if (keys.length is 1) {
+            keys = null;
+            values = null;
+        } else {
+            String [] newKeys = new String [keys.length - 1];
+            Object [] newValues = new Object [values.length - 1];
+            System.arraycopy (keys, 0, newKeys, 0, index);
+            System.arraycopy (keys, index + 1, newKeys, index, newKeys.length - index);
+            System.arraycopy (values, 0, newValues, 0, index);
+            System.arraycopy (values, index + 1, newValues, index, newValues.length - index);
+            keys = newKeys;
+            values = newValues;
+        }
+        return;
+    }
+
+    /* Add the key/value pair */
+    if (keys is null) {
+        keys = [key];
+        values = [value];
+        return;
+    }
+    for (int i=0; i<keys.length; i++) {
+        if (keys [i]==/*eq*/ key) {
+            values [i] = value;
+            return;
+        }
+    }
+    String [] newKeys = new String [keys.length + 1];
+    Object [] newValues = new Object [values.length + 1];
+    System.arraycopy (keys, 0, newKeys, 0, keys.length);
+    System.arraycopy (values, 0, newValues, 0, values.length);
+    newKeys [keys.length] = key;
+    newValues [values.length] = value;
+    keys = newKeys;
+    values = newValues;
+}
+
+/**
+ * Sets the application defined, display specific data
+ * associated with the receiver, to the argument.
+ * The <em>display specific data</em> is a single,
+ * unnamed field that is stored with every display.
+ * <p>
+ * Applications may put arbitrary objects in this field. If
+ * the object stored in the display specific data needs to
+ * be notified when the display is disposed of, it is the
+ * application's responsibility provide a
+ * <code>disposeExec()</code> handler which does so.
+ * </p>
+ *
+ * @param data the new display specific data
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #getData()
+ * @see #disposeExec(Runnable)
+ */
+public void setData (Object data) {
+    checkDevice ();
+    this.data = data;
+}
+
+
+void doSetDirectionProc( GtkWidget* widget, int direction ){
+    setDirectionProcCallbackData.display = this;
+    setDirectionProcCallbackData.data = cast(void*)direction;
+    OS.gtk_container_forall (cast(GtkContainer*)widget, cast(GtkCallback)&setDirectionProcFunc, &setDirectionProcCallbackData);
+}
+
+package static extern(C) int /*long*/ setDirectionProcFunc (GtkWidget* widget, void* data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    CallbackData* cbdata = cast(CallbackData*)data;
+    return cbdata.display.setDirectionProc( widget, cast(int)cbdata.data );
+}
+int /*long*/ setDirectionProc (GtkWidget* widget, int /*long*/ direction) {
+    OS.gtk_widget_set_direction (widget,  direction);
+    if (OS.GTK_IS_MENU_ITEM (widget)) {
+        auto submenu = OS.gtk_menu_item_get_submenu (widget);
+        if (submenu !is null) {
+            OS.gtk_widget_set_direction (submenu, cast(int)/*64*/ direction);
+            OS.gtk_container_forall (cast(GtkContainer*)submenu, cast(GtkCallback)&setDirectionProcFunc, cast(void*)direction);
+        }
+    }
+    if (OS.GTK_IS_CONTAINER (cast(GTypeInstance*)widget)) {
+        OS.gtk_container_forall (cast(GtkContainer*)widget, cast(GtkCallback)&setDirectionProcFunc, cast(void*)direction);
+    }
+    return 0;
+}
+
+void setModalDialog (Dialog modalDailog) {
+    this.modalDialog = modalDailog;
+    Shell [] shells = getShells ();
+    for (int i=0; i<shells.length; i++) shells [i].updateModal ();
+}
+
+void setModalShell (Shell shell) {
+    if (modalShells is null) modalShells = new Shell [4];
+    int index = 0, length = modalShells.length;
+    while (index < length) {
+        if (modalShells [index] is shell) return;
+        if (modalShells [index] is null) break;
+        index++;
+    }
+    if (index is length) {
+        Shell [] newModalShells = new Shell [length + 4];
+        System.arraycopy (modalShells, 0, newModalShells, 0, length);
+        modalShells = newModalShells;
+    }
+    modalShells [index] = shell;
+    Shell [] shells = getShells ();
+    for (int i=0; i<shells.length; i++) shells [i].updateModal ();
+}
+
+/**
+ * Sets the synchronizer used by the display to be
+ * the argument, which can not be null.
+ *
+ * @param synchronizer the new synchronizer for the display (must not be null)
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the synchronizer is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_FAILED_EXEC - if an exception occurred while running an inter-thread message</li>
+ * </ul>
+ */
+public void setSynchronizer (Synchronizer synchronizer) {
+    checkDevice ();
+    if (synchronizer is null) error (SWT.ERROR_NULL_ARGUMENT);
+    if (synchronizer is this.synchronizer) return;
+    Synchronizer oldSynchronizer;
+    synchronized (Device.classinfo) {
+        oldSynchronizer = this.synchronizer;
+        this.synchronizer = synchronizer;
+    }
+    if (oldSynchronizer !is null) {
+        oldSynchronizer.runAsyncMessages(true);
+    }
+}
+
+void showIMWindow (Control control) {
+    imControl = control;
+    if (preeditWindow is null) {
+        preeditWindow = cast(GtkWindow*)OS.gtk_window_new (OS.GTK_WINDOW_POPUP);
+        if (preeditWindow is null) error (SWT.ERROR_NO_HANDLES);
+        preeditLabel = cast(GtkLabel*) OS.gtk_label_new (null);
+        if (preeditLabel is null) error (SWT.ERROR_NO_HANDLES);
+        OS.gtk_container_add (cast(GtkContainer*)preeditWindow, cast(GtkWidget*) preeditLabel);
+        OS.gtk_widget_show (cast(GtkWidget*)preeditLabel);
+    }
+    char* preeditString;
+    PangoAttrList* pangoAttrs;
+    auto imHandle = control.imHandle ();
+    OS.gtk_im_context_get_preedit_string (imHandle, &preeditString, &pangoAttrs, null);
+    if (preeditString !is null && strlen (preeditString) > 0) {
+        Control widget = control.findBackgroundControl ();
+        if (widget is null) widget = control;
+        OS.gtk_widget_modify_bg (cast(GtkWidget*)preeditWindow, OS.GTK_STATE_NORMAL, widget.getBackgroundColor ());
+        widget.setForegroundColor (cast(GtkWidget*)preeditLabel, control.getForegroundColor());
+        OS.gtk_widget_modify_font (cast(GtkWidget*)preeditLabel, control.getFontDescription ());
+        if (pangoAttrs !is null) OS.gtk_label_set_attributes (preeditLabel, pangoAttrs);
+        OS.gtk_label_set_text (preeditLabel, preeditString);
+        Point point = control.toDisplay (control.getIMCaretPos ());
+        OS.gtk_window_move (preeditWindow, point.x, point.y);
+        GtkRequisition requisition;
+        OS.gtk_widget_size_request (cast(GtkWidget*)preeditLabel, &requisition);
+        OS.gtk_window_resize (preeditWindow, requisition.width, requisition.height);
+        OS.gtk_widget_show (cast(GtkWidget*)preeditWindow);
+    } else {
+        OS.gtk_widget_hide (cast(GtkWidget*)preeditWindow);
+    }
+    if (preeditString !is null) OS.g_free (preeditString);
+    if (pangoAttrs !is null) OS.pango_attr_list_unref (pangoAttrs);
+}
+
+/**
+ * Causes the user-interface thread to <em>sleep</em> (that is,
+ * to be put in a state where it does not consume CPU cycles)
+ * until an event is received or it is otherwise awakened.
+ *
+ * @return <code>true</code> if an event requiring dispatching was placed on the queue.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #wake
+ */
+public bool sleep () {
+    checkDevice ();
+    if (gdkEventCount is 0) {
+        gdkEvents = null;
+        gdkEventWidgets = null;
+    }
+    if (settingsChanged) {
+        settingsChanged = false;
+        runSettingsFld = true;
+        return false;
+    }
+    if (getMessageCount () !is 0) return true;
+    if (fds is null) {
+        allocated_nfds = 2;
+        GPollFD* ptr = cast(GPollFD*) OS.g_malloc( GPollFD.sizeof * allocated_nfds );
+        fds = ptr[ 0 .. allocated_nfds ];
+    }
+    max_priority = timeout = 0;
+    auto context = OS.g_main_context_default ();
+    bool result = false;
+    do {
+        if (OS.g_main_context_acquire (context)) {
+            result = cast(bool)OS.g_main_context_prepare (context, &max_priority);
+            int nfds;
+            while ((nfds = OS.g_main_context_query (context, max_priority, &timeout, fds.ptr, allocated_nfds)) > allocated_nfds) {
+                OS.g_free (fds.ptr);
+                allocated_nfds = nfds;
+                GPollFD* ptr = cast(GPollFD*) OS.g_malloc( GPollFD.sizeof * allocated_nfds );
+                fds = ptr[ 0 .. allocated_nfds ];
+            }
+            GPollFunc poll = OS.g_main_context_get_poll_func (context);
+            if (poll !is null) {
+                if (nfds > 0 || timeout !is 0) {
+                    /*
+                    * Bug in GTK. For some reason, g_main_context_wakeup() may
+                    * fail to wake up the UI thread from the polling function.
+                    * The fix is to sleep for a maximum of 50 milliseconds.
+                    */
+                    if (timeout < 0) timeout = 50;
+
+                    /* Exit the OS lock to allow other threads to enter GTK */
+                    Lock lock = OS.lock;
+                    int count = lock.lock ();
+                    for (int i = 0; i < count; i++) lock.unlock ();
+                    try {
+                        wake_state = false;
+                        poll( fds.ptr, nfds, timeout);
+                    } finally {
+                        for (int i = 0; i < count; i++) lock.lock ();
+                        lock.unlock ();
+                    }
+                }
+            }
+            OS.g_main_context_check (context, max_priority, fds.ptr, nfds);
+            OS.g_main_context_release (context);
+        }
+    } while (!result && getMessageCount () is 0 && !wake_state);
+    wake_state = false;
+    return true;
+}
+
+/**
+ * Causes the <code>run()</code> method of the runnable to
+ * be invoked by the user-interface thread after the specified
+ * number of milliseconds have elapsed. If milliseconds is less
+ * than zero, the runnable is not executed.
+ * <p>
+ * Note that at the time the runnable is invoked, widgets
+ * that have the receiver as their display may have been
+ * disposed. Therefore, it is necessary to check for this
+ * case inside the runnable before accessing the widget.
+ * </p>
+ *
+ * @param milliseconds the delay before running the runnable
+ * @param runnable code to run on the user-interface thread
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the runnable is null</li>
+ * </ul>
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #asyncExec
+ */
+public void timerExec (int milliseconds, Runnable runnable) {
+    checkDevice ();
+    if (runnable is null) error (SWT.ERROR_NULL_ARGUMENT);
+    if (timerList is null) timerList = new Runnable [4];
+    if (timerIds is null) timerIds = new int [4];
+    int index = 0;
+    while (index < timerList.length) {
+        if (timerList [index] is runnable) break;
+        index++;
+    }
+    if (index !is timerList.length) {
+        OS.gtk_timeout_remove (timerIds [index]);
+        timerList [index] = null;
+        timerIds [index] = 0;
+        if (milliseconds < 0) return;
+    } else {
+        if (milliseconds < 0) return;
+        index = 0;
+        while (index < timerList.length) {
+            if (timerList [index] is null) break;
+            index++;
+        }
+        if (index is timerList.length) {
+            Runnable [] newTimerList = new Runnable [timerList.length + 4];
+            SimpleType!(Runnable).arraycopy (timerList, 0, newTimerList, 0, timerList.length);
+            timerList = newTimerList;
+            int [] newTimerIds = new int [timerIds.length + 4];
+            System.arraycopy (timerIds, 0, newTimerIds, 0, timerIds.length);
+            timerIds = newTimerIds;
+        }
+    }
+    timerProcCallbackData.display = this;
+    timerProcCallbackData.data = cast(void*)index;
+    int timerId = OS.gtk_timeout_add (milliseconds, &timerProcFunc, &timerProcCallbackData);
+    if (timerId !is 0) {
+        timerIds [index] = timerId;
+        timerList [index] = runnable;
+    }
+}
+
+
+private static extern(C) int timerProcFunc ( void * data ) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    CallbackData* cbdata = cast( CallbackData* ) data;
+    return cbdata.display.timerProc( cast(int) cbdata.data );
+}
+
+int /*long*/ timerProc (int /*long*/ i) {
+    if (timerList is null) return 0;
+    int index = cast(int)/*64*/i;
+    if (0 <= index && index < timerList.length) {
+        Runnable runnable = timerList [index];
+        timerList [index] = null;
+        timerIds [index] = 0;
+        if (runnable !is null) runnable.run ();
+    }
+    return 0;
+}
+
+private static extern(C) int caretProcFunc ( void * data ) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    CallbackData* cbdata = cast( CallbackData* ) data;
+    return cbdata.display.caretProc( cast(int) cbdata.data );
+}
+int /*long*/ caretProc (int /*long*/ clientData) {
+    caretId = 0;
+    if (currentCaret is null) {
+        return 0;
+    }
+    if (currentCaret.blinkCaret()) {
+        int blinkRate = currentCaret.blinkRate;
+        if (blinkRate is 0) return 0;
+        caretProcCallbackData.display = this;
+        caretProcCallbackData.data = cast(void*)0;
+        caretId = OS.gtk_timeout_add (blinkRate, &caretProcFunc, &caretProcCallbackData);
+    } else {
+        currentCaret = null;
+    }
+    return 0;
+}
+
+
+package int doSizeAllocateConnect( CallbackData* cbdata, GtkWidget* window, GtkWidget* widget ){
+    cbdata.display = this;
+    cbdata.data = cast(void*)widget;
+    return OS.g_signal_connect (cast(void*)window, OS.size_allocate.ptr, cast(GCallback)&sizeAllocateProcFunc, cast(void*)&cbdata);
+}
+
+private static extern(C) void sizeAllocateProcFunc (GtkWidget* handle, int /*long*/ arg0, int /*long*/ user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    auto cbdata = cast(CallbackData*)user_data;
+    cbdata.display.sizeAllocateProc( cast(GtkWidget*)handle, arg0, cast(int)cbdata.data );
+}
+
+void sizeAllocateProc (GtkWidget* handle, int /*long*/ arg0, int /*long*/ user_data) {
+    Widget widget = getWidget ( cast(GtkWidget*)user_data);
+    if (widget is null) return 0;
+    widget.sizeAllocateProc (handle, arg0, user_data);
+}
+
+
+package int doSizeRequestConnect( CallbackData* cbdata, GtkWidget* window, GtkWidget* widget ){
+    cbdata.display = this;
+    cbdata.data = cast(void*)widget;
+    return OS.g_signal_connect (cast(void*)window, OS.size_request.ptr, cast(GCallback)&sizeRequestProcFunc, cast(void*)&cbdata );
+}
+
+private static extern(C) void  sizeRequestProcFunc (GtkWidget* handle, int /*long*/ arg0, int /*long*/ user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    auto cbdata = cast(CallbackData*)user_data;
+    cbdata.display.sizeRequestProcMeth( cast(GtkWidget*)handle, arg0, cast(int)cbdata.data );
+}
+
+int /*long*/ sizeRequestProcMeth (GtkWidget* handle, int /*long*/ arg0, int /*long*/ user_data) {
+    Widget widget = getWidget (cast(GtkWidget*)user_data);
+    if (widget is null) return 0;
+    return widget.sizeRequestProc (handle, arg0, user_data);
+}
+
+package void doTreeSelectionProcConnect( CallbackData* cbdata, GtkWidget* widget, GtkTreeSelection* selection ){
+    cbdata.display = this;
+    cbdata.data = cast(void*)widget;
+    OS.gtk_tree_selection_selected_foreach (selection, &treeSelectionProcFunc, widget);
+}
+
+private static extern(C) void  treeSelectionProcFunc (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, void* data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    auto cbdata = cast(CallbackData*)data;
+    cbdata.display.treeSelectionProcMeth( model, path, iter, cbdata.data );
+}
+
+void treeSelectionProcMeth (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, void* data) {
+    Widget widget = getWidget (cast(GtkWidget*)data);
+    if (widget is null) return 0;
+    widget.treeSelectionProc (model, path, iter, treeSelection, treeSelectionLength++);
+}
+
+void saveResources () {
+    int resourceCount = 0;
+    if (resources is null) {
+        resources = new Resource [RESOURCE_SIZE];
+    } else {
+        resourceCount = resources.length;
+        Resource [] newResources = new Resource [resourceCount + RESOURCE_SIZE];
+        System.arraycopy (resources, 0, newResources, 0, resourceCount);
+        resources = newResources;
+    }
+    if (systemFont !is null) {
+        resources [resourceCount++] = systemFont;
+        systemFont = null;
+    }
+    if (errorImage !is null) resources [resourceCount++] = errorImage;
+    if (infoImage !is null) resources [resourceCount++] = infoImage;
+    if (questionImage !is null) resources [resourceCount++] = questionImage;
+    if (warningImage !is null) resources [resourceCount++] = warningImage;
+    errorImage = infoImage = questionImage = warningImage = null;
+    for (int i=0; i<cursors.length; i++) {
+        if (cursors [i] !is null) resources [resourceCount++] = cursors [i];
+        cursors [i] = null;
+    }
+    if (resourceCount < RESOURCE_SIZE) {
+        Resource [] newResources = new Resource [resourceCount];
+        System.arraycopy (resources, 0, newResources, 0, resourceCount);
+        resources = newResources;
+    }
+}
+
+void sendEvent (int eventType, Event event) {
+    if (eventTable is null && filterTable is null) {
+        return;
+    }
+    if (event is null) event = new Event ();
+    event.display = this;
+    event.type = eventType;
+    if (event.time is 0) event.time = getLastEventTime ();
+    if (!filterEvent (event)) {
+        if (eventTable !is null) eventTable.sendEvent (event);
+    }
+}
+
+void setCurrentCaret (Caret caret) {
+    if (caretId !is 0) OS.gtk_timeout_remove(caretId);
+    caretId = 0;
+    currentCaret = caret;
+    if (caret is null) return;
+    int blinkRate = currentCaret.blinkRate;
+    caretProcCallbackData.display = this;
+    caretProcCallbackData.data = cast(void*)0;
+    caretId = OS.gtk_timeout_add (blinkRate, &caretProcFunc, &caretProcCallbackData);
+}
+
+private static extern(C) int /*long*/ shellMapProcFunc (int /*long*/ handle, int /*long*/ arg0, int /*long*/ user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    auto cbdata = cast(CallbackData*)user_data;
+    return cbdata.display.shellMapProc( cast(GtkWidget*)handle, arg0, cast(int)cbdata.data );
+}
+
+int /*long*/ shellMapProc (GtkWidget* handle, int /*long*/ arg0, int /*long*/ user_data) {
+    Widget widget = getWidget (cast(GtkWidget*)handle);
+    if (widget is null) return 0;
+    return widget.shellMapProc (handle, arg0, user_data);
+}
+
+private static extern(C) int /*long*/ styleSetProcFunc (int /*long*/ gobject, int /*long*/ arg1, int /*long*/ user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    auto cbdata = cast(CallbackData*)user_data;
+    return cbdata.display.styleSetProcMeth( gobject, arg1, cast(int)cbdata.data );
+}
+int /*long*/ styleSetProcMeth (int /*long*/ gobject, int /*long*/ arg1, int /*long*/ user_data) {
+    settingsChanged = true;
+    return 0;
+}
+
+/**
+ * Causes the <code>run()</code> method of the runnable to
+ * be invoked by the user-interface thread at the next
+ * reasonable opportunity. The thread which calls this method
+ * is suspended until the runnable completes.  Specifying <code>null</code>
+ * as the runnable simply wakes the user-interface thread.
+ * <p>
+ * Note that at the time the runnable is invoked, widgets
+ * that have the receiver as their display may have been
+ * disposed. Therefore, it is necessary to check for this
+ * case inside the runnable before accessing the widget.
+ * </p>
+ *
+ * @param runnable code to run on the user-interface thread or <code>null</code>
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_FAILED_EXEC - if an exception occurred when executing the runnable</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #asyncExec
+ */
+public void syncExec (Runnable runnable) {
+    Synchronizer synchronizer;
+    synchronized (Device.classinfo) {
+        if (isDisposed ()) error (SWT.ERROR_DEVICE_DISPOSED);
+        synchronizer = this.synchronizer;
+        synchronized (idleLock) {
+            if (idleNeeded && idleHandle is 0) {
+                //NOTE: calling unlocked function in OS
+            idleProcCallbackData.display = this;
+            idleProcCallbackData.data = cast(void*)0;
+            //PORTING_TODO: was _g_idle_add, calling directly
+            idleHandle = OS.g_idle_add (&idleProcFunc, &idleProcCallbackData);
+            }
+        }
+    }
+    synchronizer.syncExec (runnable);
+}
+
+static int translateKey (int key) {
+    for (int i=0; i<KeyTable.length; i++) {
+        if (KeyTable [i] [0] is key) return KeyTable [i] [1];
+    }
+    return 0;
+}
+
+static int untranslateKey (int key) {
+    for (int i=0; i<KeyTable.length; i++) {
+        if (KeyTable [i] [1] is key) return KeyTable [i] [0];
+    }
+    return 0;
+}
+
+/**
+ * Forces all outstanding paint requests for the display
+ * to be processed before this method returns.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see Control#update()
+ */
+public void update () {
+    checkDevice ();
+    flushExposes (null, true);
+    OS.gdk_window_process_all_updates ();
+}
+
+/**
+ * If the receiver's user-interface thread was <code>sleep</code>ing,
+ * causes it to be awakened and start running again. Note that this
+ * method may be called from any thread.
+ *
+ * @exception SWTException <ul>
+ *    <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ *
+ * @see #sleep
+ */
+public void wake () {
+    synchronized (Device.classinfo) {
+        if (isDisposed ()) error (SWT.ERROR_DEVICE_DISPOSED);
+        if (thread is Thread.getThis ()) return;
+        wakeThread ();
+    }
+}
+
+void wakeThread () {
+    OS.g_main_context_wakeup (null);
+    wake_state = true;
+}
+
+static dchar wcsToMbcs (char ch) {
+    //PORTING_TODO not sure about this
+    int key = ch & 0xFFFF;
+    if (key <= 0x7F) return ch;
+    char [] buffer = Converter.wcsToMbcs (null,[ch], false);
+    if (buffer.length is 1) return '\0';
+    if (buffer.length is 2) {
+        return cast(char) (((buffer [0] & 0xFF) << 8) | (buffer [1] & 0xFF));
+    }
+    return '\0';
+}
+
+private static extern(C) int /*long*/ windowProcFunc2 (GtkWidget* handle, int /*long*/ user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    CallbackData* cbdata = cast(CallbackData*)user_data;
+    return cbdata.display.windowProc( handle, cast(int)cbdata.data );
+}
+int /*long*/ windowProc (GtkWidget* handle, int /*long*/ user_data) {
+    Widget widget = getWidget (handle);
+    if (widget is null) return 0;
+    return widget.windowProc (handle, user_data);
+}
+
+private static extern(C) int /*long*/ windowProcFunc3 (int /*long*/ handle, int /*long*/ arg0, int /*long*/ user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    CallbackData* cbdata = cast(CallbackData*)user_data;
+    return cbdata.display.windowProc( cast(GtkWidget*)handle, arg0, cast(int)cbdata.data );
+}
+int /*long*/ windowProc (GtkWidget* handle, int /*long*/ arg0, int /*long*/ user_data) {
+    Widget widget = getWidget (handle);
+    if (widget is null) return 0;
+    return widget.windowProc (handle, arg0, user_data);
+}
+
+private static extern(C) int /*long*/ windowProcFunc4 (int /*long*/ handle, int /*long*/ arg0, int /*long*/ arg1, int /*long*/ user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    CallbackData* cbdata = cast(CallbackData*)user_data;
+    return cbdata.display.windowProc( cast(GtkWidget*)handle, arg0, arg1, cast(int)cbdata.data );
+}
+int /*long*/ windowProc (GtkWidget* handle, int /*long*/ arg0, int /*long*/ arg1, int /*long*/ user_data) {
+    Widget widget = getWidget (handle);
+    if (widget is null) return 0;
+    return widget.windowProc (handle, arg0, arg1, user_data);
+}
+
+private static extern(C) int /*long*/ windowProcFunc5 (int /*long*/ handle, int /*long*/ arg0, int /*long*/ arg1, int /*long*/ arg2, int /*long*/ user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    CallbackData* cbdata = cast(CallbackData*)user_data;
+    return cbdata.display.windowProc( cast(GtkWidget*)handle, arg0, arg1, arg2, cast(int)cbdata.data );
+}
+int /*long*/ windowProc (GtkWidget* handle, int /*long*/ arg0, int /*long*/ arg1, int /*long*/ arg2, int /*long*/ user_data) {
+    Widget widget = getWidget (handle);
+    if (widget is null) return 0;
+    return widget.windowProc (handle, arg0, arg1, arg2, user_data);
+}
+
+package int doWindowTimerAdd( CallbackData* cbdata, int delay, GtkWidget* widget ){
+    OS.g_object_set_data(cast(GObject*)widget, Display.classinfo.name.ptr, cast(void*)this);
+    return OS.gtk_timeout_add (delay, &windowTimerProcFunc, widget);
+}
+private static extern(C) int /*long*/ windowTimerProcFunc (void* user_data) {
+    version(LOG) getDwtLogger().error( __FILE__, __LINE__,  "Display {}:", __LINE__ ).flush;
+    Display d = cast(Display) OS.g_object_get_data(cast(GObject*)user_data, Display.classinfo.name.ptr );
+    return d.windowTimerProc( cast(GtkWidget*)user_data );
+}
+
+int /*long*/ windowTimerProc (GtkWidget* handle) {
+    Widget widget = getWidget (handle);
+    if (widget is null) return 0;
+    return widget.timerProc (handle);
+}
+
+}
+
+package struct CallbackData {
+    Display display;
+    void* data;
+}
+