Mercurial > projects > dwt-linux
changeset 86:a360c3c265bc
Tracker
author | Frank Benoit <benoit@tionex.de> |
---|---|
date | Tue, 15 Jan 2008 21:19:03 +0100 |
parents | feee0eb2824c |
children | 4f37e84078de |
files | doc/todo.txt dwt/widgets/Tracker.d |
diffstat | 2 files changed, 1015 insertions(+), 17 deletions(-) [+] |
line wrap: on
line diff
--- a/doc/todo.txt Tue Jan 15 20:14:47 2008 +0100 +++ b/doc/todo.txt Tue Jan 15 21:19:03 2008 +0100 @@ -24,7 +24,8 @@ Next Steps: * accessibility package (independant) - * Shell + * check global Thread.sleep(float) + * check global .equals EventTable @@ -85,38 +86,38 @@ widgets/Button // OKs widgets/Canvas // OKs widgets/Caret // OKs -widgets/ColorDialog -widgets/Combo +widgets/ColorDialog // OK +widgets/Combo // OK widgets/Composite // OKs widgets/Control // OKs -widgets/CoolBar -widgets/CoolItem +widgets/CoolBar // OK +widgets/CoolItem // OK widgets/DateTime widgets/Decorations // OKs -widgets/Dialog -widgets/DirectoryDialog +widgets/Dialog // OK +widgets/DirectoryDialog // OK widgets/Display // OKs widgets/Event // OKs widgets/EventTable // OKs -widgets/ExpandBar -widgets/ExpandItem -widgets/FileDialog -widgets/FontDialog +widgets/ExpandBar // OK +widgets/ExpandItem // OK +widgets/FileDialog // OK +widgets/FontDialog // OK widgets/Group // OKs widgets/ImageList // OKs widgets/Item // OKs widgets/Label // OKs widgets/Layout // OKs -widgets/Link +widgets/Link // OK widgets/List // OKs widgets/Listener // OKs widgets/Menu // OKs widgets/MenuItem // OKs -widgets/MessageBox +widgets/MessageBox // OK widgets/Monitor // OKs -widgets/ProgressBar +widgets/ProgressBar // OK widgets/RunnableLock // OKs -widgets/Sash +widgets/Sash // OK widgets/Scale // OKs widgets/Scrollable // OKs widgets/ScrollBar // OKs @@ -130,8 +131,8 @@ widgets/TableColumn widgets/TableItem widgets/Text // OKs -widgets/ToolBar -widgets/ToolItem +widgets/ToolBar // OK +widgets/ToolItem // OK widgets/ToolTip // OKs widgets/Tracker widgets/Tray // OKs @@ -570,3 +571,5 @@ + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/dwt/widgets/Tracker.d Tue Jan 15 21:19:03 2008 +0100 @@ -0,0 +1,995 @@ +/******************************************************************************* + * 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.Tracker; + + + +import dwt.DWT; +import dwt.DWTException; +import dwt.events.ControlListener; +import dwt.events.KeyListener; +import dwt.graphics.Cursor; +import dwt.graphics.Point; +import dwt.graphics.Rectangle; +import dwt.internal.gtk.OS; +import dwt.widgets.Widget; +import dwt.widgets.Composite; +import dwt.widgets.Display; +import dwt.widgets.TypedListener; +import dwt.widgets.Event; + +import tango.core.Exception; +import tango.core.Thread; + +/** + * Instances of this class implement rubber banding rectangles that are + * drawn onto a parent <code>Composite</code> or <code>Display</code>. + * These rectangles can be specified to respond to mouse and key events + * by either moving or resizing themselves accordingly. Trackers are + * typically used to represent window geometries in a lightweight manner. + * + * <dl> + * <dt><b>Styles:</b></dt> + * <dd>LEFT, RIGHT, UP, DOWN, RESIZE</dd> + * <dt><b>Events:</b></dt> + * <dd>Move, Resize</dd> + * </dl> + * <p> + * Note: Rectangle move behavior is assumed unless RESIZE is specified. + * </p><p> + * IMPORTANT: This class is <em>not</em> intended to be subclassed. + * </p> + */ +public class Tracker : Widget { + Composite parent; + GdkCursor* cursor, lastCursor; + GdkDrawable* window; + bool tracking, cancelled, grabbed, stippled; + Rectangle [] rectangles, proportions; + Rectangle bounds; + int cursorOrientation = DWT.NONE; + int oldX, oldY; + + final static int STEPSIZE_SMALL = 1; + final static int STEPSIZE_LARGE = 9; + +/** + * 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 widget which will be the parent of the new instance (cannot be null) + * @param style the style of widget 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 DWT#LEFT + * @see DWT#RIGHT + * @see DWT#UP + * @see DWT#DOWN + * @see DWT#RESIZE + * @see Widget#checkSubclass + * @see Widget#getStyle + */ +public this (Composite parent, int style) { + super (parent, checkStyle(style)); + this.parent = parent; +} + +/** + * Constructs a new instance of this class given the display + * to create it on 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><p> + * Note: Currently, null can be passed in for the display argument. + * This has the effect of creating the tracker on the currently active + * display if there is one. If there is no current display, the + * tracker is created on a "default" display. <b>Passing in null as + * the display argument is not considered to be good coding style, + * and may not be supported in a future release of DWT.</b> + * </p> + * + * @param display the display to create the tracker on + * @param style the style of control to construct + * + * @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 DWT#LEFT + * @see DWT#RIGHT + * @see DWT#UP + * @see DWT#DOWN + */ +public this (Display display, int style) { + if (display is null) display = Display.getCurrent (); + if (display is null) display = Display.getDefault (); + if (!display.isValidThread ()) { + error (DWT.ERROR_THREAD_INVALID_ACCESS); + } + this.style = checkStyle (style); + this.display = display; +} + +/** + * Adds the listener to the collection of listeners who will + * be notified when the control is moved or resized, by sending + * it one of the messages defined in the <code>ControlListener</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 ControlListener + * @see #removeControlListener + */ +public void addControlListener(ControlListener listener) { + checkWidget(); + if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); + TypedListener typedListener = new TypedListener (listener); + addListener (DWT.Resize, typedListener); + addListener (DWT.Move, typedListener); +} + +/** + * Adds the listener to the collection of listeners who will + * be notified when keys are pressed and released on the system keyboard, by sending + * it one of the messages defined in the <code>KeyListener</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 KeyListener + * @see #removeKeyListener + */ +public void addKeyListener(KeyListener listener) { + checkWidget(); + if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); + TypedListener typedListener = new TypedListener (listener); + addListener(DWT.KeyUp,typedListener); + addListener(DWT.KeyDown,typedListener); +} + +Point adjustMoveCursor () { + if (bounds is null) return null; + int newX = bounds.x + bounds.width / 2; + int newY = bounds.y; + + Point point = display.map (parent, null, newX, newY); + display.setCursorLocation (point); + + /* + * The call to XWarpPointer does not always place the pointer on the + * exact location that is specified, so do a query (below) to get the + * actual location of the pointer after it has been moved. + */ + int actualX, actualY, state; + OS.gdk_window_get_pointer (cast(GdkWindow*)window, &actualX, &actualY, &state); + return new Point (actualX, actualY); +} + +Point adjustResizeCursor () { + if (bounds is null) return null; + int newX, newY; + + if ((cursorOrientation & DWT.LEFT) !is 0) { + newX = bounds.x; + } else if ((cursorOrientation & DWT.RIGHT) !is 0) { + newX = bounds.x + bounds.width; + } else { + newX = bounds.x + bounds.width / 2; + } + + if ((cursorOrientation & DWT.UP) !is 0) { + newY = bounds.y; + } else if ((cursorOrientation & DWT.DOWN) !is 0) { + newY = bounds.y + bounds.height; + } else { + newY = bounds.y + bounds.height / 2; + } + + Point point = display.map (parent, null, newX, newY); + display.setCursorLocation (point); + + /* + * The call to XWarpPointer does not always place the pointer on the + * exact location that is specified, so do a query (below) to get the + * actual location of the pointer after it has been moved. + */ + int actualX, actualY, state; + OS.gdk_window_get_pointer (window, &actualX, &actualY, &state); + return new Point (actualX, actualY ); +} + + +/** + * Stops displaying the tracker rectangles. Note that this is not considered + * to be a cancelation by the user. + * + * @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 close () { + checkWidget(); + tracking = false; +} + +static int checkStyle (int style) { + if ((style & (DWT.LEFT | DWT.RIGHT | DWT.UP | DWT.DOWN)) is 0) { + style |= DWT.LEFT | DWT.RIGHT | DWT.UP | DWT.DOWN; + } + return style; +} + +Rectangle computeBounds () { + if (rectangles.length is 0) return null; + int xMin = rectangles [0].x; + int yMin = rectangles [0].y; + int xMax = rectangles [0].x + rectangles [0].width; + int yMax = rectangles [0].y + rectangles [0].height; + + for (int i = 1; i < rectangles.length; i++) { + if (rectangles [i].x < xMin) xMin = rectangles [i].x; + if (rectangles [i].y < yMin) yMin = rectangles [i].y; + int rectRight = rectangles [i].x + rectangles [i].width; + if (rectRight > xMax) xMax = rectRight; + int rectBottom = rectangles [i].y + rectangles [i].height; + if (rectBottom > yMax) yMax = rectBottom; + } + + return new Rectangle (xMin, yMin, xMax - xMin, yMax - yMin); +} + +Rectangle [] computeProportions (Rectangle [] rects) { + Rectangle [] result = new Rectangle [rects.length]; + bounds = computeBounds (); + if (bounds !is null) { + for (int i = 0; i < rects.length; i++) { + int x = 0, y = 0, width = 0, height = 0; + if (bounds.width !is 0) { + x = (rects [i].x - bounds.x) * 100 / bounds.width; + width = rects [i].width * 100 / bounds.width; + } else { + width = 100; + } + if (bounds.height !is 0) { + y = (rects [i].y - bounds.y) * 100 / bounds.height; + height = rects [i].height * 100 / bounds.height; + } else { + height = 100; + } + result [i] = new Rectangle (x, y, width, height); + } + } + return result; +} + +void drawRectangles (Rectangle [] rects) { + auto window = OS.GDK_ROOT_PARENT (); + if (parent !is null) { + window = OS.GTK_WIDGET_WINDOW (parent.paintHandle()); + } + if (window is null) return; + auto gc = OS.gdk_gc_new (window); + if (gc is null) return; + auto colormap = OS.gdk_colormap_get_system (); + GdkColor color; + OS.gdk_color_white (colormap, &color); + OS.gdk_gc_set_foreground (gc, &color); + OS.gdk_gc_set_subwindow (gc, OS.GDK_INCLUDE_INFERIORS); + OS.gdk_gc_set_function (gc, OS.GDK_XOR); + for (int i=0; i<rects.length; i++) { + Rectangle rect = rects [i]; + OS.gdk_draw_rectangle (window, gc, 0, rect.x, rect.y, rect.width, rect.height); + } + OS.g_object_unref (gc); +} + +/** + * Returns the bounds that are being drawn, expressed relative to the parent + * widget. If the parent is a <code>Display</code> then these are screen + * coordinates. + * + * @return the bounds of the Rectangles being drawn + * + * @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 Rectangle [] getRectangles () { + checkWidget(); + Rectangle [] result = new Rectangle [rectangles.length]; + for (int i = 0; i < rectangles.length; i++) { + Rectangle current = rectangles [i]; + result [i] = new Rectangle (current.x, current.y, current.width, current.height); + } + return result; +} + +/** + * Returns <code>true</code> if the rectangles are drawn with a stippled line, <code>false</code> otherwise. + * + * @return the stippled effect of the rectangles + * + * @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 getStippled () { + checkWidget(); + return stippled; +} + +bool grab () { + int result = OS.gdk_pointer_grab (window, false, OS.GDK_POINTER_MOTION_MASK | OS.GDK_BUTTON_RELEASE_MASK, window, cursor, OS.GDK_CURRENT_TIME); + return result is OS.GDK_GRAB_SUCCESS; +} + +override int gtk_button_release_event (GtkWidget* widget, GdkEventButton* event) { + return gtk_mouse (OS.GDK_BUTTON_RELEASE, widget, event); +} + +override int gtk_key_press_event (GtkWidget* widget, GdkEventKey* keyEvent) { + auto result = super.gtk_key_press_event (widget, keyEvent); + if (result !is 0) return result; + int stepSize = ((keyEvent.state & OS.GDK_CONTROL_MASK) !is 0) ? STEPSIZE_SMALL : STEPSIZE_LARGE; + int xChange = 0, yChange = 0; + switch (keyEvent.keyval) { + case OS.GDK_Escape: + cancelled = true; + // fallthrough + case OS.GDK_Return: + tracking = false; + break; + case OS.GDK_Left: + xChange = -stepSize; + break; + case OS.GDK_Right: + xChange = stepSize; + break; + case OS.GDK_Up: + yChange = -stepSize; + break; + case OS.GDK_Down: + yChange = stepSize; + break; + default: + } + if (xChange !is 0 || yChange !is 0) { + Rectangle [] oldRectangles = rectangles; + Rectangle [] rectsToErase = new Rectangle [rectangles.length]; + for (int i = 0; i < rectangles.length; i++) { + Rectangle current = rectangles [i]; + rectsToErase [i] = new Rectangle (current.x, current.y, current.width, current.height); + } + Event event = new Event (); + event.x = oldX + xChange; + event.y = oldY + yChange; + if ((style & DWT.RESIZE) !is 0) { + resizeRectangles (xChange, yChange); + sendEvent (DWT.Resize, event); + /* + * It is possible (but unlikely) that application + * code could have disposed the widget in the resize + * event. If this happens return false to indicate + * that the tracking has failed. + */ + if (isDisposed ()) { + cancelled = true; + return 1; + } + bool draw = false; + /* + * It is possible that application code could have + * changed the rectangles in the resize event. If this + * happens then only redraw the tracker if the rectangle + * values have changed. + */ + if (rectangles !is oldRectangles) { + int length = rectangles.length; + if (length !is rectsToErase.length) { + draw = true; + } else { + for (int i = 0; i < length; i++) { + if (rectangles [i] !=/*eq*/ rectsToErase [i]) { + draw = true; + break; + } + } + } + } else { + draw = true; + } + if (draw) { + drawRectangles (rectsToErase); + update (); + drawRectangles (rectangles); + } + Point cursorPos = adjustResizeCursor (); + if (cursorPos !is null) { + oldX = cursorPos.x; + oldY = cursorPos.y; + } + } else { + moveRectangles (xChange, yChange); + sendEvent (DWT.Move, event); + /* + * It is possible (but unlikely) that application + * code could have disposed the widget in the move + * event. If this happens return false to indicate + * that the tracking has failed. + */ + if (isDisposed ()) { + cancelled = true; + return 1; + } + bool draw = false; + /* + * It is possible that application code could have + * changed the rectangles in the move event. If this + * happens then only redraw the tracker if the rectangle + * values have changed. + */ + if (rectangles !is oldRectangles) { + int length = rectangles.length; + if (length !is rectsToErase.length) { + draw = true; + } else { + for (int i = 0; i < length; i++) { + if (rectangles [i] !=/*eq*/ rectsToErase [i]) { + draw = true; + break; + } + } + } + } else { + draw = true; + } + if (draw) { + drawRectangles (rectsToErase); + update (); + drawRectangles (rectangles); + } + Point cursorPos = adjustMoveCursor (); + if (cursorPos !is null) { + oldX = cursorPos.x; + oldY = cursorPos.y; + } + } + } + return result; +} + +override int gtk_motion_notify_event (GtkWidget* widget, GdkEventMotion* eventPtr) { + if (cursor !is lastCursor) { + ungrab (); + grabbed = grab (); + lastCursor = cursor; + } + return gtk_mouse (OS.GDK_MOTION_NOTIFY, widget, eventPtr); +} + +private int gtk_mouse (int eventType, GtkWidget* widget, void* eventPtr) { + int newX, newY; + OS.gdk_window_get_pointer (window, &newX, &newY, null); + if (oldX !is newX || oldY !is newY ) { + Rectangle [] oldRectangles = rectangles; + Rectangle [] rectsToErase = new Rectangle [rectangles.length]; + for (int i = 0; i < rectangles.length; i++) { + Rectangle current = rectangles [i]; + rectsToErase [i] = new Rectangle (current.x, current.y, current.width, current.height); + } + Event event = new Event (); + if (parent is null) { + event.x = newX ; + event.y = newY ; + } else { + Point screenCoord = display.map (parent, null, newX , newY ); + event.x = screenCoord.x; + event.y = screenCoord.y; + } + if ((style & DWT.RESIZE) !is 0) { + resizeRectangles (newX - oldX, newY - oldY); + sendEvent (DWT.Resize, event); + /* + * It is possible (but unlikely), that application + * code could have disposed the widget in the resize + * event. If this happens, return false to indicate + * that the tracking has failed. + */ + if (isDisposed ()) { + cancelled = true; + return 1; + } + bool draw = false; + /* + * It is possible that application code could have + * changed the rectangles in the resize event. If this + * happens then only redraw the tracker if the rectangle + * values have changed. + */ + if (rectangles !is oldRectangles) { + int length = rectangles.length; + if (length !is rectsToErase.length) { + draw = true; + } else { + for (int i = 0; i < length; i++) { + if (rectangles [i] !=/*eq*/ rectsToErase [i]) { + draw = true; + break; + } + } + } + } else { + draw = true; + } + if (draw) { + drawRectangles (rectsToErase); + update (); + drawRectangles (rectangles); + } + Point cursorPos = adjustResizeCursor (); + if (cursorPos !is null) { + newX = cursorPos.x; + newY = cursorPos.y; + } + } else { + moveRectangles (newX - oldX, newY - oldY); + sendEvent (DWT.Move, event); + /* + * It is possible (but unlikely), that application + * code could have disposed the widget in the move + * event. If this happens, return false to indicate + * that the tracking has failed. + */ + if (isDisposed ()) { + cancelled = true; + return 1; + } + bool draw = false; + /* + * It is possible that application code could have + * changed the rectangles in the move event. If this + * happens then only redraw the tracker if the rectangle + * values have changed. + */ + if (rectangles !is oldRectangles) { + int length = rectangles.length; + if (length !is rectsToErase.length) { + draw = true; + } else { + for (int i = 0; i < length; i++) { + if (rectangles [i] !=/*eq*/ rectsToErase [i]) { + draw = true; + break; + } + } + } + } else { + draw = true; + } + if (draw) { + drawRectangles (rectsToErase); + update (); + drawRectangles (rectangles); + } + } + oldX = newX ; + oldY = newY ; + } + tracking = eventType !is OS.GDK_BUTTON_RELEASE; + return 0; +} + +void moveRectangles (int xChange, int yChange) { + if (bounds is null) return; + if (xChange < 0 && ((style & DWT.LEFT) is 0)) xChange = 0; + if (xChange > 0 && ((style & DWT.RIGHT) is 0)) xChange = 0; + if (yChange < 0 && ((style & DWT.UP) is 0)) yChange = 0; + if (yChange > 0 && ((style & DWT.DOWN) is 0)) yChange = 0; + if (xChange is 0 && yChange is 0) return; + bounds.x += xChange; bounds.y += yChange; + for (int i = 0; i < rectangles.length; i++) { + rectangles [i].x += xChange; + rectangles [i].y += yChange; + } +} + +/** + * Displays the Tracker rectangles for manipulation by the user. Returns when + * the user has either finished manipulating the rectangles or has cancelled the + * Tracker. + * + * @return <code>true</code> if the user did not cancel the Tracker, <code>false</code> otherwise + * + * @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 open () { + checkWidget(); + window = OS.GDK_ROOT_PARENT (); + if (parent !is null) { + window = OS.GTK_WIDGET_WINDOW (parent.paintHandle()); + } + if (window is null) return false; + cancelled = false; + tracking = true; + update (); + drawRectangles (rectangles); + int oldX, oldY, state; + OS.gdk_window_get_pointer (window, &oldX, &oldY, &state); + + /* + * if exactly one of UP/DOWN is specified as a style then set the cursor + * orientation accordingly (the same is done for LEFT/RIGHT styles below) + */ + int vStyle = style & (DWT.UP | DWT.DOWN); + if (vStyle is DWT.UP || vStyle is DWT.DOWN) { + cursorOrientation |= vStyle; + } + int hStyle = style & (DWT.LEFT | DWT.RIGHT); + if (hStyle is DWT.LEFT || hStyle is DWT.RIGHT) { + cursorOrientation |= hStyle; + } + + int mask = OS.GDK_BUTTON1_MASK | OS.GDK_BUTTON2_MASK | OS.GDK_BUTTON3_MASK; + bool mouseDown = (state & mask) !is 0; + if (!mouseDown) { + Point cursorPos = null; + if ((style & DWT.RESIZE) !is 0) { + cursorPos = adjustResizeCursor (); + } else { + cursorPos = adjustMoveCursor (); + } + if (cursorPos !is null) { + oldX = cursorPos.x; + oldY = cursorPos.y; + } + } + this.oldX = oldX ; + this.oldY = oldY ; + + grabbed = grab (); + lastCursor = cursor; + + /* Tracker behaves like a Dialog with its own OS event loop. */ + GdkEvent* gdkEvent; + while (tracking) { + if (parent !is null && parent.isDisposed ()) break; + GdkEvent* eventPtr; + while (true) { + eventPtr = OS.gdk_event_get (); + if (eventPtr !is null) { + break; + } else { + try { Thread.sleep(0.050); } catch (TracedException ex) {} + } + } + gdkEvent = eventPtr; + auto widget = OS.gtk_get_event_widget (eventPtr); + switch (gdkEvent.type) { + case OS.GDK_MOTION_NOTIFY: gtk_motion_notify_event (widget, cast(GdkEventMotion*)eventPtr); break; + case OS.GDK_BUTTON_RELEASE: gtk_button_release_event (widget, cast(GdkEventButton*)eventPtr); break; + case OS.GDK_KEY_PRESS: gtk_key_press_event (widget, cast(GdkEventKey*)eventPtr); break; + case OS.GDK_KEY_RELEASE: gtk_key_release_event (widget, cast(GdkEventKey*)eventPtr); break; + case OS.GDK_BUTTON_PRESS: + case OS.GDK_2BUTTON_PRESS: + case OS.GDK_3BUTTON_PRESS: + case OS.GDK_ENTER_NOTIFY: + case OS.GDK_LEAVE_NOTIFY: + /* Do not dispatch these */ + break; + case OS.GDK_EXPOSE: + update (); + drawRectangles (rectangles); + OS.gtk_main_do_event (eventPtr); + drawRectangles (rectangles); + break; + default: + OS.gtk_main_do_event (eventPtr); + } + OS.gdk_event_free (eventPtr); + } + if (!isDisposed ()) { + update (); + drawRectangles (rectangles); + } + ungrab (); + window = null; + return !cancelled; +} + +void releaseWidget () { + super.releaseWidget (); + parent = null; + rectangles = proportions = null; + bounds = null; +} + +/** + * Removes the listener from the collection of listeners who will + * be notified when the control is moved or resized. + * + * @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 ControlListener + * @see #addControlListener + */ +public void removeControlListener (ControlListener listener) { + checkWidget(); + if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); + if (eventTable is null) return; + eventTable.unhook (DWT.Resize, listener); + eventTable.unhook (DWT.Move, listener); +} + +/** + * Removes the listener from the collection of listeners who will + * be notified when keys are pressed and released on the system keyboard. + * + * @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 KeyListener + * @see #addKeyListener + */ +public void removeKeyListener(KeyListener listener) { + checkWidget(); + if (listener is null) error (DWT.ERROR_NULL_ARGUMENT); + if (eventTable is null) return; + eventTable.unhook (DWT.KeyUp, listener); + eventTable.unhook (DWT.KeyDown, listener); +} + +void resizeRectangles (int xChange, int yChange) { + if (bounds is null) return; + /* + * If the cursor orientation has not been set in the orientation of + * this change then try to set it here. + */ + if (xChange < 0 && ((style & DWT.LEFT) !is 0) && ((cursorOrientation & DWT.RIGHT) is 0)) { + cursorOrientation |= DWT.LEFT; + } + if (xChange > 0 && ((style & DWT.RIGHT) !is 0) && ((cursorOrientation & DWT.LEFT) is 0)) { + cursorOrientation |= DWT.RIGHT; + } + if (yChange < 0 && ((style & DWT.UP) !is 0) && ((cursorOrientation & DWT.DOWN) is 0)) { + cursorOrientation |= DWT.UP; + } + if (yChange > 0 && ((style & DWT.DOWN) !is 0) && ((cursorOrientation & DWT.UP) is 0)) { + cursorOrientation |= DWT.DOWN; + } + + /* + * If the bounds will flip about the x or y axis then apply the adjustment + * up to the axis (ie.- where bounds width/height becomes 0), change the + * cursor's orientation accordingly, and flip each Rectangle's origin (only + * necessary for > 1 Rectangles) + */ + if ((cursorOrientation & DWT.LEFT) !is 0) { + if (xChange > bounds.width) { + if ((style & DWT.RIGHT) is 0) return; + cursorOrientation |= DWT.RIGHT; + cursorOrientation &= ~DWT.LEFT; + bounds.x += bounds.width; + xChange -= bounds.width; + bounds.width = 0; + if (proportions.length > 1) { + for (int i = 0; i < proportions.length; i++) { + Rectangle proportion = proportions [i]; + proportion.x = 100 - proportion.x - proportion.width; + } + } + } + } else if ((cursorOrientation & DWT.RIGHT) !is 0) { + if (bounds.width < -xChange) { + if ((style & DWT.LEFT) is 0) return; + cursorOrientation |= DWT.LEFT; + cursorOrientation &= ~DWT.RIGHT; + xChange += bounds.width; + bounds.width = 0; + if (proportions.length > 1) { + for (int i = 0; i < proportions.length; i++) { + Rectangle proportion = proportions [i]; + proportion.x = 100 - proportion.x - proportion.width; + } + } + } + } + if ((cursorOrientation & DWT.UP) !is 0) { + if (yChange > bounds.height) { + if ((style & DWT.DOWN) is 0) return; + cursorOrientation |= DWT.DOWN; + cursorOrientation &= ~DWT.UP; + bounds.y += bounds.height; + yChange -= bounds.height; + bounds.height = 0; + if (proportions.length > 1) { + for (int i = 0; i < proportions.length; i++) { + Rectangle proportion = proportions [i]; + proportion.y = 100 - proportion.y - proportion.height; + } + } + } + } else if ((cursorOrientation & DWT.DOWN) !is 0) { + if (bounds.height < -yChange) { + if ((style & DWT.UP) is 0) return; + cursorOrientation |= DWT.UP; + cursorOrientation &= ~DWT.DOWN; + yChange += bounds.height; + bounds.height = 0; + if (proportions.length > 1) { + for (int i = 0; i < proportions.length; i++) { + Rectangle proportion = proportions [i]; + proportion.y = 100 - proportion.y - proportion.height; + } + } + } + } + + // apply the bounds adjustment + if ((cursorOrientation & DWT.LEFT) !is 0) { + bounds.x += xChange; + bounds.width -= xChange; + } else if ((cursorOrientation & DWT.RIGHT) !is 0) { + bounds.width += xChange; + } + if ((cursorOrientation & DWT.UP) !is 0) { + bounds.y += yChange; + bounds.height -= yChange; + } else if ((cursorOrientation & DWT.DOWN) !is 0) { + bounds.height += yChange; + } + + Rectangle [] newRects = new Rectangle [rectangles.length]; + for (int i = 0; i < rectangles.length; i++) { + Rectangle proportion = proportions[i]; + newRects[i] = new Rectangle ( + proportion.x * bounds.width / 100 + bounds.x, + proportion.y * bounds.height / 100 + bounds.y, + proportion.width * bounds.width / 100, + proportion.height * bounds.height / 100); + } + rectangles = newRects; +} + +/** + * Sets the <code>Cursor</code> of the Tracker. If this cursor is <code>null</code> + * then the cursor reverts to the default. + * + * @param newCursor the new <code>Cursor</code> to display + * + * @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 setCursor (Cursor value) { + checkWidget (); + cursor = null; + if (value !is null) cursor = value.handle; +} + +/** + * Specifies the rectangles that should be drawn, expressed relative to the parent + * widget. If the parent is a Display then these are screen coordinates. + * + * @param rectangles the bounds of the rectangles to be drawn + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the set of rectangles is null or contains a null rectangle</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 setRectangles (Rectangle [] rectangles) { + checkWidget(); + if (rectangles is null) error (DWT.ERROR_NULL_ARGUMENT); + int length = rectangles.length; + this.rectangles = new Rectangle [length]; + for (int i = 0; i < length; i++) { + Rectangle current = rectangles [i]; + if (current is null) error (DWT.ERROR_NULL_ARGUMENT); + this.rectangles [i] = new Rectangle (current.x, current.y, current.width, current.height); + } + proportions = computeProportions (rectangles); +} + +/** + * Changes the appearance of the line used to draw the rectangles. + * + * @param stippled <code>true</code> if rectangle should appear stippled + * + * @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 setStippled (bool stippled) { + checkWidget(); + this.stippled = stippled; +} + +void ungrab () { + if (grabbed) OS.gdk_pointer_ungrab (OS.GDK_CURRENT_TIME); +} + +void update () { + if (parent !is null) { + if (parent.isDisposed ()) return; + parent.getShell ().update (); + } else { + display.update (); + } +} + +}