Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2009 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 *******************************************************************************/ package org.eclipse.swt.widgets; import org.eclipse.swt.internal.wpf.*; import org.eclipse.swt.graphics.*; import org.eclipse.swt.*; import org.eclipse.swt.events.*; /** * 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> * @noextend This class is not intended to be subclassed by clients. */ public class Tracker extends Widget { Composite parent; boolean cancelled, stippled; Rectangle[] rectangles, proportions; Rectangle bounds; Cursor clientCursor; int resizeCursor, cursorOrientation = SWT.NONE; int oldX, oldY; int canvasHandle; int frame; /* * The following values mirror step sizes on Windows */ 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>SWT</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>SWT</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 SWTException <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 SWT#LEFT * @see SWT#RIGHT * @see SWT#UP * @see SWT#DOWN * @see SWT#RESIZE * @see Widget#checkSubclass * @see Widget#getStyle */ public Tracker(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>SWT</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>SWT</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 SWT.</b> * </p> * * @param display the display to create the tracker on * @param style the style of control to construct * * @exception SWTException <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 SWT#LEFT * @see SWT#RIGHT * @see SWT#UP * @see SWT#DOWN * @see SWT#RESIZE */ public Tracker(Display display, int style) { if (display == null) display = Display.getCurrent(); if (display == null) display = Display.getDefault(); if (!display.isValidThread()) { error(SWT.ERROR_THREAD_INVALID_ACCESS); } this.style = checkStyle(style); this.display = display; reskinWidget(); } /** * 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 SWTException <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 == null) error(SWT.ERROR_NULL_ARGUMENT); TypedListener typedListener = new TypedListener(listener); addListener(SWT.Resize, typedListener); addListener(SWT.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 SWTException <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 == null) error(SWT.ERROR_NULL_ARGUMENT); TypedListener typedListener = new TypedListener(listener); addListener(SWT.KeyUp, typedListener); addListener(SWT.KeyDown, typedListener); } Point adjustMoveCursor() { if (bounds == 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); return point; } Point adjustResizeCursor() { if (bounds == null) return null; int newX, newY; if ((cursorOrientation & SWT.LEFT) != 0) { newX = bounds.x; } else if ((cursorOrientation & SWT.RIGHT) != 0) { newX = bounds.x + bounds.width; } else { newX = bounds.x + bounds.width / 2; } if ((cursorOrientation & SWT.UP) != 0) { newY = bounds.y; } else if ((cursorOrientation & SWT.DOWN) != 0) { newY = bounds.y + bounds.height; } else { newY = bounds.y + bounds.height / 2; } Point point = display.map(parent, null, newX, newY); display.setCursorLocation(point); /* * If the client has not provided a custom cursor then determine * the appropriate resize cursor. */ if (clientCursor == null) { int newCursor = 0; switch (cursorOrientation) { case SWT.UP: newCursor = OS.Cursors_SizeNS(); break; case SWT.DOWN: newCursor = OS.Cursors_SizeNS(); break; case SWT.LEFT: newCursor = OS.Cursors_SizeWE(); break; case SWT.RIGHT: newCursor = OS.Cursors_SizeWE(); break; case SWT.LEFT | SWT.UP: newCursor = OS.Cursors_SizeNWSE(); break; case SWT.RIGHT | SWT.DOWN: newCursor = OS.Cursors_SizeNWSE(); break; case SWT.LEFT | SWT.DOWN: newCursor = OS.Cursors_SizeNESW(); break; case SWT.RIGHT | SWT.UP: newCursor = OS.Cursors_SizeNESW(); break; default: newCursor = OS.Cursors_SizeAll(); break; } OS.FrameworkElement_Cursor(canvasHandle, newCursor); if (resizeCursor != 0) { OS.GCHandle_Free(resizeCursor); } resizeCursor = newCursor; } return point; } static int checkStyle(int style) { if ((style & (SWT.LEFT | SWT.RIGHT | SWT.UP | SWT.DOWN)) == 0) { style |= SWT.LEFT | SWT.RIGHT | SWT.UP | SWT.DOWN; } return style; } /** * Stops displaying the tracker rectangles. Note that this is not considered * to be a cancelation by the user. * * @exception SWTException <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(); if (frame != 0) OS.DispatcherFrame_Continue(frame, false); } Rectangle computeBounds() { if (rectangles.length == 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 != null) { for (int i = 0; i < rects.length; i++) { int x = 0, y = 0, width = 0, height = 0; if (bounds.width != 0) { x = (rects[i].x - bounds.x) * 100 / bounds.width; width = rects[i].width * 100 / bounds.width; } else { width = 100; } if (bounds.height != 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; } /** * Draw the rectangles displayed by the tracker. */ void drawRectangles() { Rectangle bounds = this.bounds; if (bounds == null) return; int children = OS.Panel_Children(canvasHandle); OS.UIElementCollection_Clear(children); if (parent != null) { Rectangle rect = parent.getClientArea(); rect.intersect(bounds); bounds = rect; Point pt = display.map(parent, null, bounds.x, bounds.y); OS.Popup_HorizontalOffset(handle, pt.x); OS.Popup_VerticalOffset(handle, pt.y); } else { OS.Popup_HorizontalOffset(handle, bounds.x); OS.Popup_VerticalOffset(handle, bounds.y); } OS.FrameworkElement_Width(handle, bounds.width); OS.FrameworkElement_Height(handle, bounds.height); int stroke, brush; if (stippled) { stroke = 3; int pixelFormat = OS.PixelFormats_BlackWhite(); byte[] buffer = { -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0 }; int image = OS.BitmapSource_Create(8, 8, 96, 96, pixelFormat, 0, buffer, buffer.length, 2); OS.GCHandle_Free(pixelFormat); brush = OS.gcnew_ImageBrush(image); OS.TileBrush_TileMode(brush, OS.TileMode_Tile); OS.TileBrush_Stretch(brush, OS.Stretch_Fill); OS.TileBrush_ViewportUnits(brush, OS.BrushMappingMode_Absolute); int rect = OS.gcnew_Rect(0, 0, OS.BitmapSource_PixelWidth(image), OS.BitmapSource_PixelHeight(image)); OS.TileBrush_Viewport(brush, rect); OS.GCHandle_Free(rect); OS.GCHandle_Free(image); } else { stroke = 1; brush = OS.Brushes_Black(); } for (int i = 0; i < rectangles.length; i++) { int child = OS.gcnew_Rectangle(); OS.UIElementCollection_Add(children, child); OS.Shape_StrokeThickness(child, stroke); OS.Shape_Stroke(child, brush); Rectangle rect = rectangles[i]; OS.Canvas_SetLeft(child, rect.x - bounds.x); OS.Canvas_SetTop(child, rect.y - bounds.y); OS.FrameworkElement_Width(child, rect.width); OS.FrameworkElement_Height(child, rect.height); OS.GCHandle_Free(child); } OS.GCHandle_Free(brush); OS.GCHandle_Free(children); } /** * 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 SWTException <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(); int length = 0; if (rectangles != null) length = rectangles.length; Rectangle[] result = new Rectangle[length]; for (int i = 0; i < 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 SWTException <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 boolean getStippled() { checkWidget(); return stippled; } void HandleKeyUp(int sender, int e) { if (handle == 0) return; if (!sendKeyEvent(SWT.KeyUp, e, false)) return; } void HandleKeyDown(int sender, int e) { if (handle == 0) return; if (!sendKeyEvent(SWT.KeyDown, e, false)) return; boolean ctrlDown = (OS.Keyboard_Modifiers() & OS.ModifierKeys_Control) != 0; int stepSize = ctrlDown ? STEPSIZE_SMALL : STEPSIZE_LARGE; int key = OS.KeyEventArgs_Key(e); int xChange = 0, yChange = 0; switch (key) { case OS.Key_System: case OS.Key_Escape: cancelled = true; if (frame != 0) OS.DispatcherFrame_Continue(frame, false); break; case OS.Key_Return: if (frame != 0) OS.DispatcherFrame_Continue(frame, false); break; case OS.Key_Left: xChange = -stepSize; break; case OS.Key_Right: xChange = stepSize; break; case OS.Key_Up: yChange = -stepSize; break; case OS.Key_Down: yChange = stepSize; break; } if (xChange != 0 || yChange != 0) { Event event = new Event(); event.x = oldX + xChange; event.y = oldY + yChange; Point cursorPos; if ((style & SWT.RESIZE) != 0) { resizeRectangles(xChange, yChange); sendEvent(SWT.Resize, event); if (isDisposed()) { cancelled = true; if (frame != 0) OS.DispatcherFrame_Continue(frame, false); return; } drawRectangles(); cursorPos = adjustResizeCursor(); } else { moveRectangles(xChange, yChange); sendEvent(SWT.Move, event); if (isDisposed()) { cancelled = true; if (frame != 0) OS.DispatcherFrame_Continue(frame, false); return; } drawRectangles(); cursorPos = adjustMoveCursor(); } oldX = cursorPos.x; oldY = cursorPos.y; } } void HandleMouseUp(int sender, int e) { if (handle == 0) return; if (!sendMouseEvent(SWT.MouseUp, e, false)) return; if (frame != 0) OS.DispatcherFrame_Continue(frame, false); } void HandleMouseDown(int sender, int e) { if (handle == 0) return; if (!sendMouseEvent(SWT.MouseDown, e, false)) return; if (frame != 0) OS.DispatcherFrame_Continue(frame, false); } void HandleMouseMove(int sender, int e) { if (handle == 0) return; if (!sendMouseEvent(SWT.MouseMove, e, false)) return; int pointCanvas = OS.MouseEventArgs_GetPosition(e, canvasHandle); int point = OS.Visual_PointToScreen(canvasHandle, pointCanvas); int newX = (int) OS.Point_X(point); int newY = (int) OS.Point_Y(point); OS.GCHandle_Free(pointCanvas); OS.GCHandle_Free(point); if (newX != oldX || newY != oldY) { Event event = new Event(); event.x = newX; event.y = newY; if ((style & SWT.RESIZE) != 0) { resizeRectangles(newX - oldX, newY - oldY); sendEvent(SWT.Resize, event); if (isDisposed()) { cancelled = true; if (frame != 0) OS.DispatcherFrame_Continue(frame, false); } drawRectangles(); Point cursorPos = adjustResizeCursor(); if (cursorPos != null) { newX = cursorPos.x; newY = cursorPos.y; } } else { moveRectangles(newX - oldX, newY - oldY); sendEvent(SWT.Move, event); if (isDisposed()) { cancelled = true; if (frame != 0) OS.DispatcherFrame_Continue(frame, false); } drawRectangles(); } oldX = newX; oldY = newY; } } void moveRectangles(int xChange, int yChange) { if (bounds == null) return; if (xChange < 0 && ((style & SWT.LEFT) == 0)) xChange = 0; if (xChange > 0 && ((style & SWT.RIGHT) == 0)) xChange = 0; if (yChange < 0 && ((style & SWT.UP) == 0)) yChange = 0; if (yChange > 0 && ((style & SWT.DOWN) == 0)) yChange = 0; if (xChange == 0 && yChange == 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 SWTException <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 boolean open() { checkWidget(); if (rectangles == null) return false; if (rectangles.length == 0) return false; cancelled = false; /* * 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 & (SWT.UP | SWT.DOWN); if (vStyle == SWT.UP || vStyle == SWT.DOWN) { cursorOrientation |= vStyle; } int hStyle = style & (SWT.LEFT | SWT.RIGHT); if (hStyle == SWT.LEFT || hStyle == SWT.RIGHT) { cursorOrientation |= hStyle; } jniRef = OS.NewGlobalRef(this); if (jniRef == 0) error(SWT.ERROR_NO_HANDLES); handle = OS.gcnew_Popup(); if (handle == 0) error(SWT.ERROR_NO_HANDLES); OS.Popup_AllowsTransparency(handle, true); canvasHandle = OS.gcnew_Canvas(); if (canvasHandle == 0) error(SWT.ERROR_NO_HANDLES); OS.Popup_Child(handle, canvasHandle); OS.UIElement_IsHitTestVisible(canvasHandle, false); OS.FrameworkElement_FocusVisualStyle(canvasHandle, 0); if (clientCursor != null) { OS.FrameworkElement_Cursor(canvasHandle, clientCursor.handle); } drawRectangles(); OS.Popup_IsOpen(handle, true); OS.UIElement_Focusable(canvasHandle, true); OS.UIElement_Focus(canvasHandle); OS.UIElement_CaptureMouse(canvasHandle); boolean mouseDown = OS.Mouse_LeftButton() == OS.MouseButtonState_Pressed; Point cursorPos; if (mouseDown) { int pointCanvas = OS.Mouse_GetPosition(canvasHandle); int point = OS.Visual_PointToScreen(canvasHandle, pointCanvas); cursorPos = new Point((int) OS.Point_X(point), (int) OS.Point_Y(point)); OS.GCHandle_Free(pointCanvas); OS.GCHandle_Free(point); } else { if ((style & SWT.RESIZE) != 0) { cursorPos = adjustResizeCursor(); } else { cursorPos = adjustMoveCursor(); } } oldX = cursorPos.x; oldY = cursorPos.y; int handler = OS.gcnew_KeyEventHandler(jniRef, "HandleKeyDown"); OS.UIElement_KeyDown(canvasHandle, handler); OS.GCHandle_Free(handler); handler = OS.gcnew_KeyEventHandler(jniRef, "HandleKeyUp"); OS.UIElement_KeyUp(canvasHandle, handler); OS.GCHandle_Free(handler); handler = OS.gcnew_MouseEventHandler(jniRef, "HandleMouseMove"); OS.UIElement_MouseMove(canvasHandle, handler); OS.GCHandle_Free(handler); handler = OS.gcnew_MouseButtonEventHandler(jniRef, "HandleMouseUp"); OS.UIElement_MouseUp(canvasHandle, handler); OS.GCHandle_Free(handler); handler = OS.gcnew_MouseButtonEventHandler(jniRef, "HandleMouseDown"); OS.UIElement_MouseDown(canvasHandle, handler); OS.GCHandle_Free(handler); /* Tracker behaves like a Dialog with its own OS event loop. */ frame = OS.gcnew_DispatcherFrame(); OS.Dispatcher_PushFrame(frame); if (resizeCursor != 0) { OS.GCHandle_Free(resizeCursor); resizeCursor = 0; } OS.UIElement_ReleaseMouseCapture(canvasHandle); OS.Popup_IsOpen(handle, false); OS.GCHandle_Free(canvasHandle); OS.GCHandle_Free(handle); if (frame != 0) OS.GCHandle_Free(frame); OS.DeleteGlobalRef(jniRef); jniRef = handle = canvasHandle = frame = 0; return !cancelled; } /** * 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 SWTException <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 == null) error(SWT.ERROR_NULL_ARGUMENT); if (eventTable == null) return; eventTable.unhook(SWT.Resize, listener); eventTable.unhook(SWT.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 SWTException <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 == null) error(SWT.ERROR_NULL_ARGUMENT); if (eventTable == null) return; eventTable.unhook(SWT.KeyUp, listener); eventTable.unhook(SWT.KeyDown, listener); } void resizeRectangles(int xChange, int yChange) { if (bounds == 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 & SWT.LEFT) != 0) && ((cursorOrientation & SWT.RIGHT) == 0)) { cursorOrientation |= SWT.LEFT; } if (xChange > 0 && ((style & SWT.RIGHT) != 0) && ((cursorOrientation & SWT.LEFT) == 0)) { cursorOrientation |= SWT.RIGHT; } if (yChange < 0 && ((style & SWT.UP) != 0) && ((cursorOrientation & SWT.DOWN) == 0)) { cursorOrientation |= SWT.UP; } if (yChange > 0 && ((style & SWT.DOWN) != 0) && ((cursorOrientation & SWT.UP) == 0)) { cursorOrientation |= SWT.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 & SWT.LEFT) != 0) { if (xChange > bounds.width) { if ((style & SWT.RIGHT) == 0) return; cursorOrientation |= SWT.RIGHT; cursorOrientation &= ~SWT.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 & SWT.RIGHT) != 0) { if (bounds.width < -xChange) { if ((style & SWT.LEFT) == 0) return; cursorOrientation |= SWT.LEFT; cursorOrientation &= ~SWT.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 & SWT.UP) != 0) { if (yChange > bounds.height) { if ((style & SWT.DOWN) == 0) return; cursorOrientation |= SWT.DOWN; cursorOrientation &= ~SWT.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 & SWT.DOWN) != 0) { if (bounds.height < -yChange) { if ((style & SWT.UP) == 0) return; cursorOrientation |= SWT.UP; cursorOrientation &= ~SWT.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 & SWT.LEFT) != 0) { bounds.x += xChange; bounds.width -= xChange; } else if ((cursorOrientation & SWT.RIGHT) != 0) { bounds.width += xChange; } if ((cursorOrientation & SWT.UP) != 0) { bounds.y += yChange; bounds.height -= yChange; } else if ((cursorOrientation & SWT.DOWN) != 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 SWTException <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 newCursor) { checkWidget(); clientCursor = newCursor; if (canvasHandle != 0) { OS.FrameworkElement_Cursor(canvasHandle, clientCursor != null ? clientCursor.handle : 0); } } /** * 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 SWTException <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 == null) error(SWT.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 == null) error(SWT.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 SWTException <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(boolean stippled) { checkWidget(); this.stippled = stippled; if (handle != 0) { //TODO CHANGE RECT BRUSH } } }