Mercurial > projects > dwt-linux
view dwt/widgets/Tracker.d @ 351:f1bb3949939b
Update to SWT 3.4.1
author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 03 Nov 2008 23:35:30 +0100 |
parents | c0d810de7093 |
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/******************************************************************************* * 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 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> * * @see <a href="http://www.eclipse.org/swt/snippets/#tracker">Tracker snippets</a> * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> */ public class Tracker : Widget { Composite parent; Cursor cursor; GdkCursor* 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]; int x = rect.x; if (parent !is null && (parent.style & DWT.MIRRORED) !is 0) x = parent.getClientWidth () - rect.width - x; OS.gdk_draw_rectangle (window, gc, 0, 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 () { auto cursor = this.cursor !is null ? this.cursor.handle : null; 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 (parent !is null && (parent.style & DWT.MIRRORED) !is 0) { event.x = parent.getClientWidth () - event.width - event.x; } 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) { auto cursor = this.cursor !is null ? this.cursor.handle : null; 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; if (parent !is null && (parent.style & DWT.MIRRORED) !is 0) xChange *= -1; 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 = this.cursor !is null ? this.cursor.handle : null; /* 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 (Exception 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; } override 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 (parent !is null && (parent.style & DWT.MIRRORED) !is 0) xChange *= -1; /* * 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 = value; } /** * 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 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(); // DWT extension: allow null for zero length string //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 (); } } }