--- a/dwt/internal/gtk/OS.d	Tue Jan 15 16:35:35 2008 +0100
+++ b/dwt/internal/gtk/OS.d	Tue Jan 15 17:11:43 2008 +0100
@@ -2152,17 +2152,17 @@
 
     /* Field accessors */
 
-    static void    GTK_ACCEL_LABEL_SET_ACCEL_STRING( GtkAccelLabel *arg0, gchar * arg1 )
-            { arg0.accel_string = arg1; }
-    static gchar*  GTK_ACCEL_LABEL_GET_ACCEL_STRING( GtkAccelLabel* arg0)
-            { return arg0.accel_string; }
+    static void    GTK_ACCEL_LABEL_SET_ACCEL_STRING( void *arg0, gchar * arg1 )
+            { (cast(GtkAccelLabel*)arg0).accel_string = arg1; }
+    static gchar*  GTK_ACCEL_LABEL_GET_ACCEL_STRING( void* arg0)
+            { return (cast(GtkAccelLabel*)arg0).accel_string; }
 
-    static GtkWidget* GTK_SCROLLED_WINDOW_HSCROLLBAR( GtkScrolledWindow* arg0 )
-            { return arg0.hscrollbar; }
-    static GtkWidget* GTK_SCROLLED_WINDOW_VSCROLLBAR( GtkScrolledWindow* arg0 )
-            { return arg0.vscrollbar; }
+    static GtkWidget* GTK_SCROLLED_WINDOW_HSCROLLBAR( void* arg0 )
+            { return (cast(GtkScrolledWindow*)arg0).hscrollbar; }
+    static GtkWidget* GTK_SCROLLED_WINDOW_VSCROLLBAR( void* arg0 )
+            { return (cast(GtkScrolledWindow*)arg0).vscrollbar; }
 
-    static int GTK_SCROLLED_WINDOW_SCROLLBAR_SPACING( GtkScrolledWindow* arg0)
+    static int GTK_SCROLLED_WINDOW_SCROLLBAR_SPACING( void* arg0)
     {
         return   ((cast(GtkScrolledWindowClass*) ((cast(GTypeInstance*) arg0).g_class) ).scrollbar_spacing >= 0 ?
                   (cast(GtkScrolledWindowClass*) ((cast(GTypeInstance*) arg0).g_class)).scrollbar_spacing : 3) ;

--- a/dwt/widgets/Composite.d	Tue Jan 15 16:35:35 2008 +0100
+++ b/dwt/widgets/Composite.d	Tue Jan 15 17:11:43 2008 +0100
@@ -491,6 +491,7 @@
     return super.focusHandle ();
 }
 
+alias Scrollable.forceFocus forceFocus;
 override bool forceFocus (GtkWidget* focusHandle) {
     if (socketHandle !is null) OS.GTK_WIDGET_SET_FLAGS (focusHandle, OS.GTK_CAN_FOCUS);
     bool result = super.forceFocus (focusHandle);

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/widgets/ExpandBar.d	Tue Jan 15 17:11:43 2008 +0100
@@ -0,0 +1,709 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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
+ *******************************************************************************/
+module dwt.widgets.ExpandBar;
+
+
+import dwt.DWT;
+import dwt.DWTException;
+import dwt.events.ExpandAdapter;
+import dwt.events.ExpandEvent;
+import dwt.events.ExpandListener;
+import dwt.graphics.FontMetrics;
+import dwt.graphics.GC;
+import dwt.graphics.GCData;
+import dwt.graphics.Point;
+import dwt.internal.gtk.OS;
+import dwt.widgets.ExpandItem;
+import dwt.widgets.Composite;
+import dwt.widgets.ScrollBar;
+import dwt.widgets.TypedListener;
+import dwt.widgets.Event;
+import dwt.widgets.Control;
+
+import Math = tango.math.Math;
+
+/**
+ * Instances of this class support the layout of selectable
+ * expand bar items.
+ * <p>
+ * The item children that may be added to instances of this class
+ * must be of type <code>ExpandItem</code>.
+ * </p><p>
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>V_SCROLL</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>Expand, Collapse</dd>
+ * </dl>
+ * </p><p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ * </p>
+ *
+ * @see ExpandItem
+ * @see ExpandEvent
+ * @see ExpandListener
+ * @see ExpandAdapter
+ *
+ * @since 3.2
+ */
+public class ExpandBar : Composite {
+    ExpandItem [] items;
+    ExpandItem lastFocus;
+    int itemCount;
+    int spacing;
+    int yCurrentScroll;
+
+/**
+ * Constructs a new instance of this class given its parent
+ * and a style value describing its behavior and appearance.
+ * <p>
+ * The style value is either one of the style constants defined in
+ * class <code>DWT</code> which is applicable to instances of this
+ * class, or must be built by <em>bitwise OR</em>'ing together
+ * (that is, using the <code>int</code> "|" operator) two or more
+ * of those <code>DWT</code> style constants. The class description
+ * lists the style constants that are applicable to the class.
+ * Style bits are also inherited from superclasses.
+ * </p>
+ *
+ * @param parent a composite control which will be the parent of the new instance (cannot be null)
+ * @param style the style of control to construct
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ *
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public this (Composite parent, int style) {
+    super (parent, style);
+}
+
+/**
+ * Adds the listener to the collection of listeners who will
+ * be notified when an item in the receiver is expanded or collapsed
+ * by sending it one of the messages defined in the <code>ExpandListener</code>
+ * interface.
+ *
+ * @param listener the listener which should be notified
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see ExpandListener
+ * @see #removeExpandListener
+ */
+public void addExpandListener (ExpandListener listener) {
+    checkWidget ();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    TypedListener typedListener = new TypedListener (listener);
+    addListener (DWT.Expand, typedListener);
+    addListener (DWT.Collapse, typedListener);
+}
+
+protected void checkSubclass () {
+    if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
+}
+
+public Point computeSize (int wHint, int hHint, bool changed) {
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        if (wHint !is DWT.DEFAULT && wHint < 0) wHint = 0;
+        if (hHint !is DWT.DEFAULT && hHint < 0) hHint = 0;
+        Point size = computeNativeSize (handle, wHint, hHint, changed);
+        int border = OS.gtk_container_get_border_width (handle);
+        size.x += 2 * border;
+        size.y += 2 * border;
+        return size;
+    } else {
+        int height = 0, width = 0;
+        if (wHint is DWT.DEFAULT || hHint is DWT.DEFAULT) {
+            if (itemCount > 0) {
+                height += spacing;
+                GC gc = new GC (this);
+                for (int i = 0; i < itemCount; i++) {
+                    ExpandItem item = items [i];
+                    height += item.getHeaderHeight ();
+                    if (item.expanded) height += item.height;
+                    height += spacing;
+                    width = Math.max (width, item.getPreferredWidth (gc));
+                }
+                gc.dispose ();
+            }
+        }
+        if (width is 0) width = DEFAULT_WIDTH;
+        if (height is 0) height = DEFAULT_HEIGHT;
+        if (wHint !is DWT.DEFAULT) width = wHint;
+        if (hHint !is DWT.DEFAULT) height = hHint;
+        return new Point (width, height);
+    }
+}
+
+void createHandle (int index) {
+    state |= HANDLE;
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        fixedHandle = cast(GtkWidget*)OS.g_object_new (display.gtk_fixed_get_type (), null);
+        if (fixedHandle is null) error (DWT.ERROR_NO_HANDLES);
+        OS.gtk_fixed_set_has_window (fixedHandle, true);
+        handle = cast(GtkWidget*)OS.gtk_vbox_new (false, 0);
+        if (handle is null) error (DWT.ERROR_NO_HANDLES);
+        if ((style & DWT.V_SCROLL) !is 0) {
+            scrolledHandle = cast(GtkWidget*)OS.gtk_scrolled_window_new (null, null);
+            if (scrolledHandle is null) error (DWT.ERROR_NO_HANDLES);
+            int vsp = (style & DWT.V_SCROLL) !is 0 ? OS.GTK_POLICY_AUTOMATIC : OS.GTK_POLICY_NEVER;
+            OS.gtk_scrolled_window_set_policy (scrolledHandle, OS.GTK_POLICY_NEVER, vsp);
+            OS.gtk_container_add (fixedHandle, scrolledHandle);
+            OS.gtk_scrolled_window_add_with_viewport (scrolledHandle, handle);
+        } else {
+            OS.gtk_container_add (fixedHandle, handle);
+        }
+        OS.gtk_container_set_border_width (handle, 0);
+    } else {
+        auto topHandle = cast(GtkWidget*)OS.g_object_new (display.gtk_fixed_get_type (), null);
+        if (topHandle is null) error (DWT.ERROR_NO_HANDLES);
+        OS.gtk_fixed_set_has_window (topHandle, true);
+        if ((style & DWT.V_SCROLL) !is 0) {
+            fixedHandle = topHandle;
+            scrolledHandle = cast(GtkWidget*)OS.gtk_scrolled_window_new (null, null);
+            if (scrolledHandle is null) error (DWT.ERROR_NO_HANDLES);
+            handle = cast(GtkWidget*)OS.g_object_new (display.gtk_fixed_get_type (), null);
+            if (handle is null) error (DWT.ERROR_NO_HANDLES);
+            OS.gtk_fixed_set_has_window (handle, true);
+            OS.gtk_container_add (fixedHandle, scrolledHandle);
+
+            /*
+            * Force the scrolledWindow to have a single child that is
+            * not scrolled automatically.  Calling gtk_container_add()
+            * seems to add the child correctly but cause a warning.
+            */
+            bool warnings = display.getWarnings ();
+            display.setWarnings (false);
+            OS.gtk_container_add (scrolledHandle, handle);
+            display.setWarnings (warnings);
+        } else {
+            handle = topHandle;
+        }
+        OS.GTK_WIDGET_SET_FLAGS (handle, OS.GTK_CAN_FOCUS);
+    }
+}
+
+void createItem (ExpandItem item, int style, int index) {
+    if (!(0 <= index && index <= itemCount)) error (DWT.ERROR_INVALID_RANGE);
+    if (itemCount is items.length) {
+        ExpandItem [] newItems = new ExpandItem [itemCount + 4];
+        System.arraycopy (items, 0, newItems, 0, items.length);
+        items = newItems;
+    }
+    System.arraycopy (items, index, items, index + 1, itemCount - index);
+    items [index] = item;
+    itemCount++;
+    if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+        if (lastFocus is null) lastFocus = item;
+    }
+    item.width = Math.max (0, getClientArea ().width - spacing * 2);
+    layoutItems (index, true);
+}
+
+void createWidget (int index) {
+    super.createWidget (index);
+    items = new ExpandItem [4];
+}
+
+void destroyItem (ExpandItem item) {
+    int index = 0;
+    while (index < itemCount) {
+        if (items [index] is item) break;
+        index++;
+    }
+    if (index is itemCount) return;
+    if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+        if (item is lastFocus) {
+            int focusIndex = index > 0 ? index - 1 : 1;
+            if (focusIndex < itemCount) {
+                lastFocus = items [focusIndex];
+                lastFocus.redraw ();
+            } else {
+                lastFocus = null;
+            }
+        }
+    }
+    System.arraycopy (items, index + 1, items, index, --itemCount - index);
+    items [itemCount] = null;
+    item.redraw ();
+    layoutItems (index, true);
+}
+
+GtkWidget* eventHandle () {
+    return OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0) ? fixedHandle : handle;
+}
+
+alias Composite.forceFocus forceFocus;
+override bool forceFocus (GtkWidget* focusHandle) {
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        if (lastFocus !is null && lastFocus.setFocus ()) return true;
+        for (int i = 0; i < itemCount; i++) {
+            ExpandItem item = items [i];
+            if (item.setFocus ()) return true;
+        }
+    }
+    return super.forceFocus (focusHandle);
+}
+
+bool hasFocus () {
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        for (int i=0; i<itemCount; i++) {
+            ExpandItem item = items [i];
+            if (item.hasFocus ()) return true;
+        }
+    }
+    return super.hasFocus();
+}
+
+int getBandHeight () {
+    if (font is null) return ExpandItem.CHEVRON_SIZE;
+    GC gc = new GC (this);
+    FontMetrics metrics = gc.getFontMetrics ();
+    gc.dispose ();
+    return Math.max (ExpandItem.CHEVRON_SIZE, metrics.getHeight ());
+}
+
+GdkColor* getForegroundColor () {
+    if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+        if ((state & FOREGROUND) is 0) {
+            return display.getSystemColor (DWT.COLOR_TITLE_FOREGROUND).handle;
+        }
+    }
+    return super.getForegroundColor ();
+}
+
+/**
+ * Returns the item at the given, zero-relative index in the
+ * receiver. Throws an exception if the index is out of range.
+ *
+ * @param index the index of the item to return
+ * @return the item at the given index
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public ExpandItem getItem (int index) {
+    checkWidget();
+    if (!(0 <= index && index < itemCount)) error (DWT.ERROR_INVALID_RANGE);
+    return items [index];
+}
+
+/**
+ * Returns the number of items contained in the receiver.
+ *
+ * @return the number of items
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int getItemCount () {
+    checkWidget();
+    return itemCount;
+}
+
+/**
+ * Returns an array of <code>ExpandItem</code>s which are the items
+ * in the receiver.
+ * <p>
+ * Note: This is not the actual structure used by the receiver
+ * to maintain its list of items, so modifying the array will
+ * not affect the receiver.
+ * </p>
+ *
+ * @return the items in the receiver
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public ExpandItem [] getItems () {
+    checkWidget ();
+    ExpandItem [] result = new ExpandItem [itemCount];
+    System.arraycopy (items, 0, result, 0, itemCount);
+    return result;
+}
+
+/**
+ * Returns the receiver's spacing.
+ *
+ * @return the spacing
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int getSpacing () {
+    checkWidget ();
+    return spacing;
+}
+
+override int /*long*/ gtk_button_press_event (GtkWidget* widget, GdkEventButton* gdkEvent) {
+    if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+        int x = cast(int)gdkEvent.x;
+        int y = cast(int)gdkEvent.y;
+        for (int i = 0; i < itemCount; i++) {
+            ExpandItem item = items[i];
+            bool hover = item.x <= x && x < (item.x + item.width) && item.y <= y && y < (item.y + getBandHeight ());
+            if (hover && item !is lastFocus) {
+                lastFocus.redraw ();
+                lastFocus = item;
+                lastFocus.redraw ();
+                forceFocus ();
+                break;
+            }
+        }
+    }
+    return super.gtk_button_press_event (widget, gdkEvent);
+}
+
+override int /*long*/ gtk_button_release_event (GtkWidget* widget, GdkEventButton* gdkEvent) {
+    if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+        if (lastFocus !is null) {
+            int x = cast(int)gdkEvent.x;
+            int y = cast(int)gdkEvent.y;
+            bool hover = lastFocus.x <= x && x < (lastFocus.x + lastFocus.width) && lastFocus.y <= y && y < (lastFocus.y + getBandHeight ());
+            if (hover) {
+                Event ev = new Event ();
+                ev.item = lastFocus;
+                notifyListeners (lastFocus.expanded ? DWT.Collapse : DWT.Expand, ev);
+                lastFocus.expanded = !lastFocus.expanded;
+                showItem (lastFocus);
+            }
+        }
+    }
+    return super.gtk_button_release_event (widget, gdkEvent);
+}
+
+override int /*long*/ gtk_expose_event (GtkWidget* widget, GdkEventExpose* gdkEvent) {
+    if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+        GCData data = new GCData ();
+        data.damageRgn = gdkEvent.region;
+        GC gc = GC.gtk_new (this, data);
+        OS.gdk_gc_set_clip_region (gc.handle, gdkEvent.region);
+        bool hasFocus = isFocusControl ();
+        for (int i = 0; i < itemCount; i++) {
+            ExpandItem item = items [i];
+            item.drawItem (gc, hasFocus && item is lastFocus);
+        }
+        gc.dispose ();
+    }
+    return super.gtk_expose_event (widget, gdkEvent);
+}
+
+override int /*long*/ gtk_focus_in_event (GtkWidget* widget, GdkEventFocus* event) {
+    if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+        if (lastFocus !is null) lastFocus.redraw ();
+    }
+    return super.gtk_focus_in_event(widget, event);
+}
+
+override int /*long*/ gtk_focus_out_event (GtkWidget* widget, GdkEventFocus* event) {
+    if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+        if (lastFocus !is null) lastFocus.redraw ();
+    }
+    return super.gtk_focus_out_event (widget, event);
+}
+
+override int /*long*/ gtk_key_press_event (GtkWidget* widget, GdkEventKey* gdkEvent) {
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        if (!hasFocus ()) return 0;
+        auto result = super.gtk_key_press_event (widget, gdkEvent);
+        if (result !is 0) return result;
+        int index = 0;
+        while (index < itemCount) {
+            if (items [index].hasFocus ()) break;
+            index++;
+        }
+        bool next = false;
+        switch (gdkEvent.keyval) {
+            case OS.GDK_Up:
+            case OS.GDK_Left: next = false; break;
+            case OS.GDK_Down:
+            case OS.GDK_Right: next = true; break;
+            default: return result;
+        }
+        int start = index, offset = next ? 1 : -1;
+        while ((index = (index + offset + itemCount) % itemCount) !is start) {
+            ExpandItem item = items [index];
+            if (item.setFocus ()) return result;
+        }
+        return result;
+    } else {
+        if (lastFocus !is null) {
+            switch (gdkEvent.keyval) {
+                case OS.GDK_Return:
+                case OS.GDK_space:
+                    Event ev = new Event ();
+                    ev.item = lastFocus;
+                    sendEvent (lastFocus.expanded ? DWT.Collapse :DWT.Expand, ev);
+                    lastFocus.expanded = !lastFocus.expanded;
+                    showItem (lastFocus);
+                    break;
+                case OS.GDK_Up:
+                case OS.GDK_KP_Up: {
+                    int focusIndex = indexOf (lastFocus);
+                    if (focusIndex > 0) {
+                        lastFocus.redraw ();
+                        lastFocus = items [focusIndex - 1];
+                        lastFocus.redraw ();
+                    }
+                    break;
+                }
+                case OS.GDK_Down:
+                case OS.GDK_KP_Down: {
+                    int focusIndex = indexOf (lastFocus);
+                    if (focusIndex < itemCount - 1) {
+                        lastFocus.redraw ();
+                        lastFocus = items [focusIndex + 1];
+                        lastFocus.redraw ();
+                    }
+                    break;
+                }
+                default:
+            }
+        }
+    }
+    return super.gtk_key_press_event (widget, gdkEvent);
+}
+
+/**
+ * Searches the receiver's list starting at the first item
+ * (index 0) until an item is found that is equal to the
+ * argument, and returns the index of that item. If no item
+ * is found, returns -1.
+ *
+ * @param item the search item
+ * @return the index of the item
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the item is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int indexOf (ExpandItem item) {
+    checkWidget();
+    if (item is null) error (DWT.ERROR_NULL_ARGUMENT);
+    for (int i = 0; i < itemCount; i++) {
+        if (items [i] is item) return i;
+    }
+    return -1;
+}
+
+void layoutItems (int index, bool setScrollbar_) {
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        for (int i = 0; i < itemCount; i++) {
+            ExpandItem item = items [i];
+            if (item !is null) item.resizeControl (yCurrentScroll);
+        }
+    } else {
+        if (index < itemCount) {
+            int y = spacing - yCurrentScroll;
+            for (int i = 0; i < index; i++) {
+                ExpandItem item = items [i];
+                if (item.expanded) y += item.height;
+                y += item.getHeaderHeight() + spacing;
+            }
+            for (int i = index; i < itemCount; i++) {
+                ExpandItem item = items [i];
+                item.setBounds (spacing, y, 0, 0, true, false);
+                if (item.expanded) y += item.height;
+                y += item.getHeaderHeight() + spacing;
+            }
+        }
+        if (setScrollbar_) setScrollbar ();
+    }
+}
+
+GtkWidget* parentingHandle () {
+    return OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0) ? fixedHandle : handle;
+}
+
+void releaseChildren (bool destroy) {
+    for (int i = 0; i < itemCount; i++) {
+        ExpandItem item = items [i];
+        if (item !is null && !item.isDisposed ()) {
+            item.release (false);
+        }
+    }
+    super.releaseChildren (destroy);
+}
+
+/**
+ * Removes the listener from the collection of listeners who will
+ * be notified when items in the receiver are expanded or collapsed.
+ *
+ * @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 DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see ExpandListener
+ * @see #addExpandListener
+ */
+public void removeExpandListener (ExpandListener listener) {
+    checkWidget ();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) return;
+    eventTable.unhook (DWT.Expand, listener);
+    eventTable.unhook (DWT.Collapse, listener);
+}
+
+int setBounds (int x, int y, int width, int height, bool move, bool resize) {
+    int result = super.setBounds (x, y, width, height, move, resize);
+    if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+        if (resize) {
+            if ((style & DWT.V_SCROLL) !is 0) {
+                setScrollbar ();
+            } else {
+                for (int i = 0; i < itemCount; i++) {
+                    ExpandItem item = items [i];
+                    int newWidth = Math.max (0, getClientArea ().width - spacing * 2);
+                    if (item.width !is newWidth) {
+                        item.setBounds (0, 0, newWidth, item.height, false, true);
+                    }
+                }
+            }
+        }
+    }
+    return result;
+}
+
+void setFontDescription (PangoFontDescription* font) {
+    super.setFontDescription (font);
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        for (int i = 0; i < itemCount; i++) {
+            items[i].setFontDescription (font);
+        }
+        layoutItems (0, true);
+    }
+}
+
+void setForegroundColor (GdkColor* color) {
+    super.setForegroundColor (color);
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        for (int i = 0; i < itemCount; i++) {
+            items[i].setForegroundColor (color);
+        }
+    }
+}
+
+void setScrollbar () {
+    if (itemCount is 0) return;
+    if ((style & DWT.V_SCROLL) is 0) return;
+    int height = getClientArea ().height;
+    ExpandItem item = items [itemCount - 1];
+    int maxHeight = item.y + getBandHeight () + spacing;
+    if (item.expanded) maxHeight += item.height;
+    auto adjustmentHandle = OS.gtk_scrolled_window_get_vadjustment (scrolledHandle);
+    yCurrentScroll = cast(int)adjustmentHandle.value;
+
+    //claim bottom free space
+    if (yCurrentScroll > 0 && height > maxHeight) {
+        yCurrentScroll = Math.max (0, yCurrentScroll + maxHeight - height);
+        layoutItems (0, false);
+    }
+    maxHeight += yCurrentScroll;
+    adjustmentHandle.value = Math.min (yCurrentScroll, maxHeight);
+    adjustmentHandle.upper = maxHeight;
+    adjustmentHandle.page_size = height;
+    OS.gtk_adjustment_changed (adjustmentHandle);
+    int policy = maxHeight > height ? OS.GTK_POLICY_ALWAYS : OS.GTK_POLICY_NEVER;
+    OS.gtk_scrolled_window_set_policy (scrolledHandle, OS.GTK_POLICY_NEVER, policy);
+    int width = OS.GTK_WIDGET_WIDTH (fixedHandle) - spacing * 2;
+    if (policy is OS.GTK_POLICY_ALWAYS) {
+        auto vHandle = OS.GTK_SCROLLED_WINDOW_VSCROLLBAR (scrolledHandle);
+        GtkRequisition requisition;
+        OS.gtk_widget_size_request (vHandle, &requisition);
+        width -= requisition.width;
+    }
+    width = Math.max (0,  width);
+    for (int i = 0; i < itemCount; i++) {
+        ExpandItem item2 = items[i];
+        item2.setBounds (0, 0, width, item2.height, false, true);
+    }
+}
+
+/**
+ * Sets the receiver's spacing. Spacing specifies the number of pixels allocated around
+ * each item.
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setSpacing (int spacing) {
+    checkWidget ();
+    if (spacing < 0) return;
+    if (spacing is this.spacing) return;
+    this.spacing = spacing;
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        OS.gtk_box_set_spacing (handle, spacing);
+        OS.gtk_container_set_border_width (handle, spacing);
+    } else {
+        if ((style & DWT.V_SCROLL) is 0) {
+            int width = Math.max (0, getClientArea ().width - spacing * 2);
+            for (int i = 0; i < itemCount; i++) {
+                ExpandItem item = items [i];
+                if (item.width !is width) item.setBounds (0, 0, width, item.height, false, true);
+            }
+        }
+        layoutItems (0, true);
+        redraw ();
+    }
+}
+
+void showItem (ExpandItem item) {
+    Control control = item.control;
+    if (control !is null && !control.isDisposed ()) {
+        control.setVisible (item.expanded);
+    }
+    item.redraw ();
+    int index = indexOf (item);
+    layoutItems (index + 1, true);
+}
+
+void updateScrollBarValue (ScrollBar bar) {
+    yCurrentScroll = bar.getSelection();
+    layoutItems (0, false);
+}
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/widgets/ExpandItem.d	Tue Jan 15 17:11:43 2008 +0100
@@ -0,0 +1,623 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 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
+ *******************************************************************************/
+module dwt.widgets.ExpandItem;
+
+
+import dwt.DWT;
+import dwt.DWTException;
+import dwt.graphics.GC;
+import dwt.graphics.Image;
+import dwt.graphics.Point;
+import dwt.graphics.Rectangle;
+import dwt.internal.Converter;
+import dwt.internal.gtk.OS;
+import dwt.widgets.Item;
+import dwt.widgets.Control;
+import dwt.widgets.Display;
+import dwt.widgets.ExpandBar;
+import dwt.widgets.ImageList;
+import dwt.widgets.Event;
+
+import Math = tango.math.Math;
+static import tango.stdc.stringz;
+
+/**
+ * Instances of this class represent a selectable user interface object
+ * that represents a expandable item in a expand bar.
+ * <p>
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>(none)</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>(none)</dd>
+ * </dl>
+ * </p><p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ * </p>
+ *
+ * @see ExpandBar
+ *
+ * @since 3.2
+ */
+public class ExpandItem : Item {
+    ExpandBar parent;
+    Control control;
+    ImageList imageList;
+    GtkWidget* clientHandle, boxHandle, labelHandle, imageHandle;
+    bool expanded;
+    int x, y, width, height;
+    int imageHeight, imageWidth;
+    static final int TEXT_INSET = 6;
+    static final int BORDER = 1;
+    static final int CHEVRON_SIZE = 24;
+
+/**
+ * Constructs a new instance of this class given its parent
+ * and a style value describing its behavior and appearance.
+ * <p>
+ * The style value is either one of the style constants defined in
+ * class <code>DWT</code> which is applicable to instances of this
+ * class, or must be built by <em>bitwise OR</em>'ing together
+ * (that is, using the <code>int</code> "|" operator) two or more
+ * of those <code>DWT</code> style constants. The class description
+ * lists the style constants that are applicable to the class.
+ * Style bits are also inherited from superclasses.
+ * </p>
+ *
+ * @param parent a composite control which will be the parent of the new instance (cannot be null)
+ * @param style the style of control to construct
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ *
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public this (ExpandBar parent, int style) {
+    super (parent, style);
+    this.parent = parent;
+    createWidget (parent.getItemCount ());
+}
+
+/**
+ * Constructs a new instance of this class given its parent, a
+ * style value describing its behavior and appearance, and the index
+ * at which to place it in the items maintained by its parent.
+ * <p>
+ * The style value is either one of the style constants defined in
+ * class <code>DWT</code> which is applicable to instances of this
+ * class, or must be built by <em>bitwise OR</em>'ing together
+ * (that is, using the <code>int</code> "|" operator) two or more
+ * of those <code>DWT</code> style constants. The class description
+ * lists the style constants that are applicable to the class.
+ * Style bits are also inherited from superclasses.
+ * </p>
+ *
+ * @param parent a composite control which will be the parent of the new instance (cannot be null)
+ * @param style the style of control to construct
+ * @param index the zero-relative index to store the receiver in its parent
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
+ *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ *
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public this (ExpandBar parent, int style, int index) {
+    super (parent, style);
+    this.parent = parent;
+    createWidget (index);
+}
+
+protected void checkSubclass () {
+    if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
+}
+
+void createHandle (int index) {
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        state |= HANDLE;
+        handle = OS.gtk_expander_new (null);
+        if (handle is null) error (DWT.ERROR_NO_HANDLES);
+        clientHandle = cast(GtkWidget*)OS.g_object_new (display.gtk_fixed_get_type (), null);
+        if (clientHandle is null) error (DWT.ERROR_NO_HANDLES);
+        OS.gtk_container_add (handle, clientHandle);
+        boxHandle = cast(GtkWidget*)OS.gtk_hbox_new (false, 4);
+        if (boxHandle is null) error (DWT.ERROR_NO_HANDLES);
+        labelHandle = cast(GtkWidget*)OS.gtk_label_new (null);
+        if (labelHandle is null) error (DWT.ERROR_NO_HANDLES);
+        imageHandle = cast(GtkWidget*)OS.gtk_image_new ();
+        if (imageHandle is null) error (DWT.ERROR_NO_HANDLES);
+        OS.gtk_container_add (boxHandle, imageHandle);
+        OS.gtk_container_add (boxHandle, labelHandle);
+        OS.gtk_expander_set_label_widget (handle, boxHandle);
+        OS.GTK_WIDGET_SET_FLAGS (handle, OS.GTK_CAN_FOCUS);
+    }
+}
+
+void createWidget (int index) {
+    super.createWidget (index);
+    showWidget (index);
+    parent.createItem (this, style, index);
+}
+
+void deregister() {
+    super.deregister();
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        display.removeWidget (clientHandle);
+        display.removeWidget (boxHandle);
+        display.removeWidget (labelHandle);
+        display.removeWidget (imageHandle);
+    }
+}
+
+void destroyWidget () {
+    parent.destroyItem (this);
+    super.destroyWidget ();
+}
+
+void drawChevron (GC gc, int x, int y) {
+    int [] polyline1, polyline2;
+    if (expanded) {
+        int px = x + 4 + 5;
+        int py = y + 4 + 7;
+        polyline1 = [
+                px,py, px+1,py, px+1,py-1, px+2,py-1, px+2,py-2, px+3,py-2, px+3,py-3,
+                px+3,py-2, px+4,py-2, px+4,py-1, px+5,py-1, px+5,py, px+6,py];
+        py += 4;
+        polyline2 = [
+                px,py, px+1,py, px+1,py-1, px+2,py-1, px+2,py-2, px+3,py-2, px+3,py-3,
+                px+3,py-2, px+4,py-2, px+4,py-1,  px+5,py-1, px+5,py, px+6,py];
+    } else {
+        int px = x + 4 + 5;
+        int py = y + 4 + 4;
+        polyline1 = [
+                px,py, px+1,py, px+1,py+1, px+2,py+1, px+2,py+2, px+3,py+2, px+3,py+3,
+                px+3,py+2, px+4,py+2, px+4,py+1,  px+5,py+1, px+5,py, px+6,py];
+        py += 4;
+        polyline2 = [
+                px,py, px+1,py, px+1,py+1, px+2,py+1, px+2,py+2, px+3,py+2, px+3,py+3,
+                px+3,py+2, px+4,py+2, px+4,py+1,  px+5,py+1, px+5,py, px+6,py];
+    }
+    gc.setForeground (display.getSystemColor (DWT.COLOR_TITLE_FOREGROUND));
+    gc.drawPolyline (polyline1);
+    gc.drawPolyline (polyline2);
+}
+
+void drawItem (GC gc, bool drawFocus) {
+    int headerHeight = parent.getBandHeight ();
+    Display display = getDisplay ();
+    gc.setForeground (display.getSystemColor (DWT.COLOR_TITLE_BACKGROUND));
+    gc.setBackground (display.getSystemColor (DWT.COLOR_TITLE_BACKGROUND_GRADIENT));
+    gc.fillGradientRectangle (x, y, width, headerHeight, true);
+    if (expanded) {
+        gc.setForeground (display.getSystemColor (DWT.COLOR_TITLE_BACKGROUND_GRADIENT));
+        gc.drawLine (x, y + headerHeight, x, y + headerHeight + height - 1);
+        gc.drawLine (x, y + headerHeight + height - 1, x + width - 1, y + headerHeight + height - 1);
+        gc.drawLine (x + width - 1, y + headerHeight + height - 1, x + width - 1, y + headerHeight);
+    }
+    int drawX = x;
+    if (image !is null) {
+        drawX += ExpandItem.TEXT_INSET;
+        if (imageHeight > headerHeight) {
+            gc.drawImage (image, drawX, y + headerHeight - imageHeight);
+        } else {
+            gc.drawImage (image, drawX, y + (headerHeight - imageHeight) / 2);
+        }
+        drawX += imageWidth;
+    }
+    if (text.length > 0) {
+        drawX += ExpandItem.TEXT_INSET;
+        Point size = gc.stringExtent (text);
+        gc.setForeground (parent.getForeground ());
+        gc.drawString (text, drawX, y + (headerHeight - size.y) / 2, true);
+    }
+    int chevronSize = ExpandItem.CHEVRON_SIZE;
+    drawChevron (gc, x + width - chevronSize, y + (headerHeight - chevronSize) / 2);
+    if (drawFocus) {
+        gc.drawFocus (x + 1, y + 1, width - 2, headerHeight - 2);
+    }
+}
+
+/**
+ * Returns the control that is shown when the item is expanded.
+ * If no control has been set, return <code>null</code>.
+ *
+ * @return the control
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public Control getControl () {
+    checkWidget ();
+    return control;
+}
+
+/**
+ * Returns <code>true</code> if the receiver is expanded,
+ * and false otherwise.
+ *
+ * @return the expanded state
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public bool getExpanded () {
+    checkWidget ();
+    return expanded;
+}
+
+/**
+ * Returns the height of the receiver's header
+ *
+ * @return the height of the header
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int getHeaderHeight () {
+    checkWidget ();
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        auto widget = OS.gtk_expander_get_label_widget (handle);
+        return OS.GTK_WIDGET_HEIGHT (widget);
+    }
+    return Math.max (parent.getBandHeight (), imageHeight);
+}
+
+/**
+ * Gets the height of the receiver.
+ *
+ * @return the height
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int getHeight () {
+    checkWidget ();
+    return height;
+}
+
+/**
+ * Returns the receiver's parent, which must be a <code>ExpandBar</code>.
+ *
+ * @return the receiver's parent
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public ExpandBar getParent () {
+    checkWidget();
+    return parent;
+}
+
+int getPreferredWidth (GC gc) {
+    int width = ExpandItem.TEXT_INSET * 2 + ExpandItem.CHEVRON_SIZE;
+    if (image !is null) {
+        width += ExpandItem.TEXT_INSET + imageWidth;
+    }
+    if (text.length > 0) {
+        width += gc.stringExtent (text).x;
+    }
+    return width;
+}
+
+override int /*long*/ gtk_activate (GtkWidget* widget) {
+    Event event = new Event ();
+    event.item = this;
+    int type = OS.gtk_expander_get_expanded (handle) ? DWT.Collapse : DWT.Expand;
+    parent.sendEvent (type, event);
+    return 0;
+}
+
+override int /*long*/ gtk_button_press_event (GtkWidget* widget, GdkEventButton* event) {
+    setFocus ();
+    return 0;
+}
+
+override int /*long*/ gtk_focus_out_event (GtkWidget* widget, GdkEventFocus* event) {
+    OS.GTK_WIDGET_UNSET_FLAGS (handle, OS.GTK_CAN_FOCUS);
+    parent.lastFocus = this;
+    return 0;
+}
+
+override int /*long*/ gtk_size_allocate (GtkWidget* widget, int /*long*/ allocation) {
+    parent.layoutItems (0, false);
+    return 0;
+}
+
+override int /*long*/ gtk_enter_notify_event (GtkWidget* widget, GdkEventCrossing* event) {
+    parent.gtk_enter_notify_event(widget, event);
+    return 0;
+}
+
+bool hasFocus () {
+    return OS.GTK_WIDGET_HAS_FOCUS (handle);
+}
+
+void hookEvents () {
+    super.hookEvents ();
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        OS.g_signal_connect_closure (handle, OS.activate.ptr, display.closures [ACTIVATE], false);
+        OS.g_signal_connect_closure (handle, OS.activate.ptr, display.closures [ACTIVATE_INVERSE], true);
+        OS.g_signal_connect_closure_by_id (handle, display.signalIds [BUTTON_PRESS_EVENT], 0, display.closures [BUTTON_PRESS_EVENT], false);
+        OS.g_signal_connect_closure_by_id (handle, display.signalIds [FOCUS_OUT_EVENT], 0, display.closures [FOCUS_OUT_EVENT], false);
+        OS.g_signal_connect_closure (clientHandle, OS.size_allocate.ptr, display.closures [SIZE_ALLOCATE], true);
+        OS.g_signal_connect_closure_by_id (handle, display.signalIds [ENTER_NOTIFY_EVENT], 0, display.closures [ENTER_NOTIFY_EVENT], false);
+    }
+}
+
+void redraw () {
+    if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+        int headerHeight = parent.getBandHeight ();
+        if (imageHeight > headerHeight) {
+            parent.redraw (x + ExpandItem.TEXT_INSET, y + headerHeight - imageHeight, imageWidth, imageHeight, false);
+        }
+        parent.redraw (x, y, width, headerHeight + height, false);
+    }
+}
+
+void register () {
+    super.register ();
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        display.addWidget (clientHandle, this);
+        display.addWidget (boxHandle, this);
+        display.addWidget (labelHandle, this);
+        display.addWidget (imageHandle, this);
+    }
+}
+
+void releaseHandle () {
+    super.releaseHandle ();
+    clientHandle = boxHandle = labelHandle = imageHandle = null;
+    parent = null;
+}
+
+void releaseWidget () {
+    super.releaseWidget ();
+    if (imageList !is null) imageList.dispose ();
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        if (parent.lastFocus is this) parent.lastFocus = null;
+    }
+    imageList = null;
+    control = null;
+}
+
+void resizeControl (int yScroll) {
+    if (control !is null && !control.isDisposed ()) {
+        bool visible =cast(bool) OS.gtk_expander_get_expanded (handle);
+        if (visible) {
+            int x = OS.GTK_WIDGET_X (clientHandle);
+            int y = OS.GTK_WIDGET_Y (clientHandle);
+            if (x !is -1 && y !is -1) {
+                int width = OS.GTK_WIDGET_WIDTH (clientHandle);
+                int height = OS.GTK_WIDGET_HEIGHT (clientHandle);
+                int property;
+                OS.gtk_widget_style_get1 (handle, OS.focus_line_width.ptr, &property);
+                y += property * 2;
+                height -= property * 2;
+                control.setBounds (x, y - yScroll, width, Math.max (0, height), true, true);
+            }
+        }
+        control.setVisible (visible);
+    }
+}
+
+void setBounds (int x, int y, int width, int height, bool move, bool size) {
+    redraw ();
+    int headerHeight = parent.getBandHeight ();
+    if (move) {
+        if (imageHeight > headerHeight) {
+            y += (imageHeight - headerHeight);
+        }
+        this.x = x;
+        this.y = y;
+        redraw ();
+    }
+    if (size) {
+        this.width = width;
+        this.height = height;
+        redraw ();
+    }
+    if (control !is null && !control.isDisposed ()) {
+        if (move) control.setLocation (x + BORDER, y + headerHeight);
+        if (size) control.setSize (Math.max (0, width - 2 * BORDER), Math.max (0, height - BORDER));
+    }
+}
+
+/**
+ * Sets the control that is shown when the item is expanded.
+ *
+ * @param control the new control (or null)
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li>
+ *    <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setControl (Control control) {
+    checkWidget ();
+    if (control !is null) {
+        if (control.isDisposed ()) error (DWT.ERROR_INVALID_ARGUMENT);
+        if (control.parent !is parent) error (DWT.ERROR_INVALID_PARENT);
+    }
+    if (this.control is control) return;
+    this.control = control;
+    if (control !is null) {
+        control.setVisible (expanded);
+        if (OS.GTK_VERSION < OS.buildVERSION (2, 4, 0)) {
+            int headerHeight = parent.getBandHeight ();
+            control.setBounds (x + BORDER, y + headerHeight, Math.max (0, width - 2 * BORDER), Math.max (0, height - BORDER));
+        }
+    }
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        parent.layoutItems (0, true);
+    }
+}
+
+/**
+ * Sets the expanded state of the receiver.
+ *
+ * @param expanded the new expanded state
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setExpanded (bool expanded) {
+    checkWidget ();
+    this.expanded = expanded;
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        OS.gtk_expander_set_expanded (handle, expanded);
+        parent.layoutItems (0, true);
+    } else {
+        parent.showItem (this);
+    }
+}
+
+bool setFocus () {
+    if (!OS.gtk_widget_get_child_visible (handle)) return false;
+    OS.GTK_WIDGET_SET_FLAGS (handle, OS.GTK_CAN_FOCUS);
+    OS.gtk_widget_grab_focus (handle);
+    bool result = cast(bool)OS.gtk_widget_is_focus (handle);
+    if (!result) OS.GTK_WIDGET_UNSET_FLAGS (handle, OS.GTK_CAN_FOCUS);
+    return result;
+}
+
+void setFontDescription (PangoFontDescription* font) {
+    OS.gtk_widget_modify_font (handle, font);
+    if (labelHandle !is null) OS.gtk_widget_modify_font (labelHandle, font);
+    if (imageHandle !is null) OS.gtk_widget_modify_font (imageHandle, font);
+}
+
+alias Item.setForegroundColor setForegroundColor;
+void setForegroundColor (GdkColor* color) {
+    setForegroundColor (handle, color);
+    if (labelHandle !is null) setForegroundColor (labelHandle, color);
+    if (imageHandle !is null) setForegroundColor (imageHandle, color);
+}
+
+/**
+ * Sets the height of the receiver. This is height of the item when it is expanded,
+ * excluding the height of the header.
+ *
+ * @param height the new height
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setHeight (int height) {
+    checkWidget ();
+    if (height < 0) return;
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        this.height = height;
+        OS.gtk_widget_set_size_request (clientHandle, -1, height);
+        parent.layoutItems (0, false);
+    } else {
+        setBounds (0, 0, width, height, false, true);
+        if (expanded) parent.layoutItems (parent.indexOf (this) + 1, true);
+    }
+}
+
+public void setImage (Image image) {
+    super.setImage (image);
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        if (imageList !is null) imageList.dispose ();
+        imageList = null;
+        if (image !is null) {
+            if (image.isDisposed ()) error (DWT.ERROR_INVALID_ARGUMENT);
+            imageList = new ImageList ();
+            int imageIndex = imageList.add (image);
+            auto pixbuf = imageList.getPixbuf (imageIndex);
+            OS.gtk_image_set_from_pixbuf (imageHandle, pixbuf);
+            if (text.length is 0) OS.gtk_widget_hide (labelHandle);
+            OS.gtk_widget_show (imageHandle);
+        } else {
+            OS.gtk_image_set_from_pixbuf (imageHandle, null);
+            OS.gtk_widget_show (labelHandle);
+            OS.gtk_widget_hide (imageHandle);
+        }
+    } else {
+        int oldImageHeight = imageHeight;
+        if (image !is null) {
+            Rectangle bounds = image.getBounds ();
+            imageHeight = bounds.height;
+            imageWidth = bounds.width;
+        } else {
+            imageHeight = imageWidth = 0;
+        }
+        if (oldImageHeight !is imageHeight) {
+            parent.layoutItems (parent.indexOf (this), true);
+        } else {
+            redraw ();
+        }
+    }
+}
+
+public void setText (char[] string) {
+    super.setText (string);
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        OS.gtk_label_set_text (labelHandle, tango.stdc.stringz.toStringz(string));
+    } else {
+        redraw ();
+    }
+}
+
+void showWidget (int index) {
+    if (OS.GTK_VERSION >= OS.buildVERSION (2, 4, 0)) {
+        OS.gtk_widget_show (handle);
+        OS.gtk_widget_show (clientHandle);
+        OS.gtk_container_add (parent.handle, handle);
+        OS.gtk_box_set_child_packing (parent.handle, handle, false, false, 0, OS.GTK_PACK_START);
+        if (boxHandle !is null) OS.gtk_widget_show (boxHandle);
+        if (labelHandle !is null) OS.gtk_widget_show (labelHandle);
+    }
+}
+
+alias Item.windowProc windowProc;
+override int /*long*/ windowProc (GtkWidget* handle, int /*long*/ user_data) {
+    switch (cast(int)/*64*/user_data) {
+        case ACTIVATE_INVERSE: {
+            expanded = cast(bool)OS.gtk_expander_get_expanded (handle);
+            parent.layoutItems (0, false);
+            return 0;
+        }
+        default:
+    }
+    return super.windowProc (handle, user_data);
+}
+}