| /******************************************************************************* |
| * 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.*; |
| import org.eclipse.swt.internal.win32.*; |
| 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 { |
| Control parent; |
| boolean tracking, cancelled, stippled; |
| Rectangle [] rectangles = new Rectangle [0], proportions = rectangles; |
| Rectangle bounds; |
| int /*long*/ resizeCursor; |
| Cursor clientCursor; |
| int cursorOrientation = SWT.NONE; |
| boolean inEvent = false; |
| int /*long*/ hwndTransparent, hwndOpaque, oldTransparentProc, oldOpaqueProc; |
| int oldX, oldY; |
| |
| /* |
| * 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; |
| } |
| |
| /** |
| * 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 pt = new POINT (); |
| pt.x = newX; pt.y = newY; |
| /* |
| * Convert to screen coordinates iff needed |
| */ |
| if (parent != null) { |
| OS.ClientToScreen (parent.handle, pt); |
| } |
| OS.SetCursorPos (pt.x, pt.y); |
| return new Point (pt.x, pt.y); |
| } |
| |
| 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 pt = new POINT (); |
| pt.x = newX; pt.y = newY; |
| /* |
| * Convert to screen coordinates iff needed |
| */ |
| if (parent != null) { |
| OS.ClientToScreen (parent.handle, pt); |
| } |
| OS.SetCursorPos (pt.x, pt.y); |
| |
| /* |
| * If the client has not provided a custom cursor then determine |
| * the appropriate resize cursor. |
| */ |
| if (clientCursor == null) { |
| int /*long*/ newCursor = 0; |
| switch (cursorOrientation) { |
| case SWT.UP: |
| newCursor = OS.LoadCursor (0, OS.IDC_SIZENS); |
| break; |
| case SWT.DOWN: |
| newCursor = OS.LoadCursor (0, OS.IDC_SIZENS); |
| break; |
| case SWT.LEFT: |
| newCursor = OS.LoadCursor (0, OS.IDC_SIZEWE); |
| break; |
| case SWT.RIGHT: |
| newCursor = OS.LoadCursor (0, OS.IDC_SIZEWE); |
| break; |
| case SWT.LEFT | SWT.UP: |
| newCursor = OS.LoadCursor (0, OS.IDC_SIZENWSE); |
| break; |
| case SWT.RIGHT | SWT.DOWN: |
| newCursor = OS.LoadCursor (0, OS.IDC_SIZENWSE); |
| break; |
| case SWT.LEFT | SWT.DOWN: |
| newCursor = OS.LoadCursor (0, OS.IDC_SIZENESW); |
| break; |
| case SWT.RIGHT | SWT.UP: |
| newCursor = OS.LoadCursor (0, OS.IDC_SIZENESW); |
| break; |
| default: |
| newCursor = OS.LoadCursor (0, OS.IDC_SIZEALL); |
| break; |
| } |
| OS.SetCursor (newCursor); |
| if (resizeCursor != 0) { |
| OS.DestroyCursor (resizeCursor); |
| } |
| resizeCursor = newCursor; |
| } |
| |
| return new Point (pt.x, pt.y); |
| } |
| |
| 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 (); |
| tracking = 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 [] rects, boolean stippled) { |
| if (parent == null && !OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (6, 0)) { |
| RECT rect1 = new RECT(); |
| int bandWidth = stippled ? 3 : 1; |
| for (int i = 0; i < rects.length; i++) { |
| Rectangle rect = rects[i]; |
| rect1.left = rect.x - bandWidth; |
| rect1.top = rect.y - bandWidth; |
| rect1.right = rect.x + rect.width + bandWidth * 2; |
| rect1.bottom = rect.y + rect.height + bandWidth * 2; |
| OS.RedrawWindow (hwndOpaque, rect1, 0, OS.RDW_INVALIDATE); |
| } |
| return; |
| } |
| int bandWidth = 1; |
| int /*long*/ hwndTrack = OS.GetDesktopWindow (); |
| if (parent != null) hwndTrack = parent.handle; |
| int /*long*/ hDC = OS.GetDCEx (hwndTrack, 0, OS.DCX_CACHE); |
| int /*long*/ hBitmap = 0, hBrush = 0, oldBrush = 0; |
| if (stippled) { |
| bandWidth = 3; |
| byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0}; |
| hBitmap = OS.CreateBitmap (8, 8, 1, 1, bits); |
| hBrush = OS.CreatePatternBrush (hBitmap); |
| oldBrush = OS.SelectObject (hDC, hBrush); |
| } |
| for (int i=0; i<rects.length; i++) { |
| Rectangle rect = rects [i]; |
| OS.PatBlt (hDC, rect.x, rect.y, rect.width, bandWidth, OS.PATINVERT); |
| OS.PatBlt (hDC, rect.x, rect.y + bandWidth, bandWidth, rect.height - (bandWidth * 2), OS.PATINVERT); |
| OS.PatBlt (hDC, rect.x + rect.width - bandWidth, rect.y + bandWidth, bandWidth, rect.height - (bandWidth * 2), OS.PATINVERT); |
| OS.PatBlt (hDC, rect.x, rect.y + rect.height - bandWidth, rect.width, bandWidth, OS.PATINVERT); |
| } |
| if (stippled) { |
| OS.SelectObject (hDC, oldBrush); |
| OS.DeleteObject (hBrush); |
| OS.DeleteObject (hBitmap); |
| } |
| OS.ReleaseDC (hwndTrack, hDC); |
| } |
| |
| /** |
| * 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(); |
| 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 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 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 (); |
| cancelled = false; |
| tracking = true; |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * If this tracker is being created without a mouse drag then |
| * we need to create a transparent window that fills the screen |
| * in order to get all mouse/keyboard events that occur |
| * outside of our visible windows (ie.- over the desktop). |
| */ |
| Callback newProc = null; |
| boolean mouseDown = OS.GetKeyState(OS.VK_LBUTTON) < 0; |
| boolean isVista = !OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (6, 0); |
| if ((parent == null && isVista) || !mouseDown) { |
| int width = OS.GetSystemMetrics (OS.SM_CXSCREEN); |
| int height = OS.GetSystemMetrics (OS.SM_CYSCREEN); |
| hwndTransparent = OS.CreateWindowEx ( |
| isVista ? OS.WS_EX_LAYERED | OS.WS_EX_NOACTIVATE : OS.WS_EX_TRANSPARENT, |
| display.windowClass, |
| null, |
| OS.WS_POPUP, |
| 0, 0, |
| width, height, |
| 0, |
| 0, |
| OS.GetModuleHandle (null), |
| null); |
| if (isVista) { |
| OS.SetLayeredWindowAttributes (hwndTransparent, 0xFFFFFF, (byte)0x01, OS.LWA_ALPHA); |
| } |
| OS.ShowWindow (hwndTransparent, OS.SW_SHOWNOACTIVATE); |
| newProc = new Callback (this, "transparentProc", 4); //$NON-NLS-1$ |
| int /*long*/ newProcAddress = newProc.getAddress (); |
| if (newProcAddress == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS); |
| if (isVista) { |
| hwndOpaque = OS.CreateWindowEx ( |
| OS.WS_EX_LAYERED | OS.WS_EX_NOACTIVATE, |
| display.windowClass, |
| null, |
| OS.WS_POPUP, |
| 0, 0, |
| width, height, |
| hwndTransparent, |
| 0, |
| OS.GetModuleHandle (null), |
| null); |
| oldOpaqueProc = OS.GetWindowLongPtr (hwndOpaque, OS.GWLP_WNDPROC); |
| OS.SetWindowLongPtr (hwndOpaque, OS.GWLP_WNDPROC, newProcAddress); |
| } else { |
| hwndOpaque = hwndTransparent; |
| } |
| oldTransparentProc = OS.GetWindowLongPtr (hwndTransparent, OS.GWLP_WNDPROC); |
| OS.SetWindowLongPtr (hwndTransparent, OS.GWLP_WNDPROC, newProcAddress); |
| OS.SetLayeredWindowAttributes (hwndOpaque, 0xFFFFFF, (byte)0xFF, OS.LWA_COLORKEY | OS.LWA_ALPHA); |
| OS.ShowWindow (hwndOpaque, OS.SW_SHOWNOACTIVATE); |
| } |
| |
| update (); |
| drawRectangles (rectangles, stippled); |
| Point cursorPos = null; |
| if (mouseDown) { |
| POINT pt = new POINT (); |
| OS.GetCursorPos (pt); |
| cursorPos = new Point (pt.x, pt.y); |
| } else { |
| if ((style & SWT.RESIZE) != 0) { |
| cursorPos = adjustResizeCursor (); |
| } else { |
| cursorPos = adjustMoveCursor (); |
| } |
| } |
| if (cursorPos != null) { |
| oldX = cursorPos.x; |
| oldY = cursorPos.y; |
| } |
| |
| try { |
| /* Tracker behaves like a Dialog with its own OS event loop. */ |
| MSG msg = new MSG (); |
| while (tracking && !cancelled) { |
| if (parent != null && parent.isDisposed ()) break; |
| OS.GetMessage (msg, 0, 0, 0); |
| OS.TranslateMessage (msg); |
| switch (msg.message) { |
| case OS.WM_LBUTTONUP: |
| case OS.WM_MOUSEMOVE: |
| wmMouse (msg.message, msg.wParam, msg.lParam); |
| break; |
| case OS.WM_IME_CHAR: wmIMEChar (msg.hwnd, msg.wParam, msg.lParam); break; |
| case OS.WM_CHAR: wmChar (msg.hwnd, msg.wParam, msg.lParam); break; |
| case OS.WM_KEYDOWN: wmKeyDown (msg.hwnd, msg.wParam, msg.lParam); break; |
| case OS.WM_KEYUP: wmKeyUp (msg.hwnd, msg.wParam, msg.lParam); break; |
| case OS.WM_SYSCHAR: wmSysChar (msg.hwnd, msg.wParam, msg.lParam); break; |
| case OS.WM_SYSKEYDOWN: wmSysKeyDown (msg.hwnd, msg.wParam, msg.lParam); break; |
| case OS.WM_SYSKEYUP: wmSysKeyUp (msg.hwnd, msg.wParam, msg.lParam); break; |
| } |
| if (OS.WM_KEYFIRST <= msg.message && msg.message <= OS.WM_KEYLAST) continue; |
| if (OS.WM_MOUSEFIRST <= msg.message && msg.message <= OS.WM_MOUSELAST) continue; |
| if (!(parent == null && isVista)) { |
| if (msg.message == OS.WM_PAINT) { |
| update (); |
| drawRectangles (rectangles, stippled); |
| } |
| } |
| OS.DispatchMessage (msg); |
| if (!(parent == null && isVista)) { |
| if (msg.message == OS.WM_PAINT) { |
| drawRectangles (rectangles, stippled); |
| } |
| } |
| } |
| if (mouseDown) OS.ReleaseCapture (); |
| if (!isDisposed()) { |
| update (); |
| drawRectangles (rectangles, stippled); |
| } |
| } finally { |
| /* |
| * Cleanup: If a transparent window was created in order to capture events then |
| * destroy it and its callback object now. |
| */ |
| if (hwndTransparent != 0) { |
| OS.DestroyWindow (hwndTransparent); |
| hwndTransparent = 0; |
| } |
| hwndOpaque = 0; |
| if (newProc != null) { |
| newProc.dispose (); |
| oldTransparentProc = oldOpaqueProc = 0; |
| } |
| /* |
| * Cleanup: If this tracker was resizing then the last cursor that it created |
| * needs to be destroyed. |
| */ |
| if (resizeCursor != 0) { |
| OS.DestroyCursor (resizeCursor); |
| resizeCursor = 0; |
| } |
| } |
| tracking = false; |
| 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 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 (newCursor != null) { |
| if (inEvent) OS.SetCursor (clientCursor.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 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); |
| this.rectangles = new Rectangle [rectangles.length]; |
| for (int i = 0; i < rectangles.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; |
| } |
| |
| int /*long*/ transparentProc (int /*long*/ hwnd, int /*long*/ msg, int /*long*/ wParam, int /*long*/ lParam) { |
| switch ((int)/*64*/msg) { |
| /* |
| * We typically do not want to answer that the transparent window is |
| * transparent to hits since doing so negates the effect of having it |
| * to grab events. However, clients of the tracker should not be aware |
| * of this transparent window. Therefore if there is a hit query |
| * performed as a result of client code then answer that the transparent |
| * window is transparent to hits so that its existence will not impact |
| * the client. |
| */ |
| case OS.WM_NCHITTEST: |
| if (inEvent) return OS.HTTRANSPARENT; |
| break; |
| case OS.WM_SETCURSOR: |
| if (hwndOpaque == hwnd) { |
| if (clientCursor != null) { |
| OS.SetCursor (clientCursor.handle); |
| return 1; |
| } |
| if (resizeCursor != 0) { |
| OS.SetCursor (resizeCursor); |
| return 1; |
| } |
| } |
| break; |
| case OS.WM_PAINT: |
| boolean isVista = !OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (6, 0); |
| if (parent == null && isVista && hwndOpaque == hwnd) { |
| PAINTSTRUCT ps = new PAINTSTRUCT(); |
| int /*long*/ hDC = OS.BeginPaint (hwnd, ps); |
| int /*long*/ hBitmap = 0, hBrush = 0, oldBrush = 0; |
| int /*long*/ transparentBrush = OS.CreateSolidBrush(0xFFFFFF); |
| oldBrush = OS.SelectObject (hDC, transparentBrush); |
| OS.PatBlt (hDC, ps.left, ps.top, ps.right - ps.left, ps.bottom - ps.top, OS.PATCOPY); |
| OS.SelectObject (hDC, oldBrush); |
| OS.DeleteObject (transparentBrush); |
| int bandWidth = 1; |
| if (stippled) { |
| bandWidth = 3; |
| byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0}; |
| hBitmap = OS.CreateBitmap (8, 8, 1, 1, bits); |
| hBrush = OS.CreatePatternBrush (hBitmap); |
| oldBrush = OS.SelectObject (hDC, hBrush); |
| OS.SetBkColor (hDC, 0xF0F0F0); |
| } else { |
| oldBrush = OS.SelectObject (hDC, OS.GetStockObject(OS.BLACK_BRUSH)); |
| } |
| Rectangle[] rects = this.rectangles; |
| for (int i=0; i<rects.length; i++) { |
| Rectangle rect = rects [i]; |
| OS.PatBlt (hDC, rect.x, rect.y, rect.width, bandWidth, OS.PATCOPY); |
| OS.PatBlt (hDC, rect.x, rect.y + bandWidth, bandWidth, rect.height - (bandWidth * 2), OS.PATCOPY); |
| OS.PatBlt (hDC, rect.x + rect.width - bandWidth, rect.y + bandWidth, bandWidth, rect.height - (bandWidth * 2), OS.PATCOPY); |
| OS.PatBlt (hDC, rect.x, rect.y + rect.height - bandWidth, rect.width, bandWidth, OS.PATCOPY); |
| } |
| OS.SelectObject (hDC, oldBrush); |
| if (stippled) { |
| OS.DeleteObject (hBrush); |
| OS.DeleteObject (hBitmap); |
| } |
| OS.EndPaint (hwnd, ps); |
| return 0; |
| } |
| } |
| return OS.CallWindowProc (hwnd == hwndTransparent ? oldTransparentProc : oldOpaqueProc, hwnd, (int)/*64*/msg, wParam, lParam); |
| } |
| |
| void update () { |
| if (parent == null && !OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (6, 0)) return; |
| if (parent != null) { |
| if (parent.isDisposed ()) return; |
| Shell shell = parent.getShell (); |
| shell.update (true); |
| } else { |
| display.update (); |
| } |
| } |
| |
| LRESULT wmKeyDown (int /*long*/ hwnd, int /*long*/ wParam, int /*long*/ lParam) { |
| LRESULT result = super.wmKeyDown (hwnd, wParam, lParam); |
| if (result != null) return result; |
| boolean isMirrored = parent != null && (parent.style & SWT.MIRRORED) != 0; |
| int stepSize = OS.GetKeyState (OS.VK_CONTROL) < 0 ? STEPSIZE_SMALL : STEPSIZE_LARGE; |
| int xChange = 0, yChange = 0; |
| switch ((int)/*64*/wParam) { |
| case OS.VK_ESCAPE: |
| cancelled = true; |
| tracking = false; |
| break; |
| case OS.VK_RETURN: |
| tracking = false; |
| break; |
| case OS.VK_LEFT: |
| xChange = isMirrored ? stepSize : -stepSize; |
| break; |
| case OS.VK_RIGHT: |
| xChange = isMirrored ? -stepSize : stepSize; |
| break; |
| case OS.VK_UP: |
| yChange = -stepSize; |
| break; |
| case OS.VK_DOWN: |
| yChange = stepSize; |
| break; |
| } |
| if (xChange != 0 || yChange != 0) { |
| Rectangle [] oldRectangles = rectangles; |
| boolean oldStippled = stippled; |
| 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; |
| Point cursorPos; |
| if ((style & SWT.RESIZE) != 0) { |
| resizeRectangles (xChange, yChange); |
| inEvent = true; |
| sendEvent (SWT.Resize, event); |
| inEvent = false; |
| /* |
| * 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 LRESULT.ONE; |
| } |
| boolean 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 != oldRectangles) { |
| int length = rectangles.length; |
| if (length != rectsToErase.length) { |
| draw = true; |
| } else { |
| for (int i = 0; i < length; i++) { |
| if (!rectangles [i].equals (rectsToErase [i])) { |
| draw = true; |
| break; |
| } |
| } |
| } |
| } else { |
| draw = true; |
| } |
| if (draw) { |
| drawRectangles (rectsToErase, oldStippled); |
| update (); |
| drawRectangles (rectangles, stippled); |
| } |
| cursorPos = adjustResizeCursor (); |
| } else { |
| moveRectangles (xChange, yChange); |
| inEvent = true; |
| sendEvent (SWT.Move, event); |
| inEvent = false; |
| /* |
| * 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 LRESULT.ONE; |
| } |
| boolean 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 != oldRectangles) { |
| int length = rectangles.length; |
| if (length != rectsToErase.length) { |
| draw = true; |
| } else { |
| for (int i = 0; i < length; i++) { |
| if (!rectangles [i].equals (rectsToErase [i])) { |
| draw = true; |
| break; |
| } |
| } |
| } |
| } else { |
| draw = true; |
| } |
| if (draw) { |
| drawRectangles (rectsToErase, oldStippled); |
| update (); |
| drawRectangles (rectangles, stippled); |
| } |
| cursorPos = adjustMoveCursor (); |
| } |
| if (cursorPos != null) { |
| oldX = cursorPos.x; |
| oldY = cursorPos.y; |
| } |
| } |
| return result; |
| } |
| |
| LRESULT wmSysKeyDown (int /*long*/ hwnd, int /*long*/ wParam, int /*long*/ lParam) { |
| LRESULT result = super.wmSysKeyDown (hwnd, wParam, lParam); |
| if (result != null) return result; |
| cancelled = true; |
| tracking = false; |
| return result; |
| } |
| |
| LRESULT wmMouse (int message, int /*long*/ wParam, int /*long*/ lParam) { |
| boolean isMirrored = parent != null && (parent.style & SWT.MIRRORED) != 0; |
| int newPos = OS.GetMessagePos (); |
| int newX = OS.GET_X_LPARAM (newPos); |
| int newY = OS.GET_Y_LPARAM (newPos); |
| if (newX != oldX || newY != oldY) { |
| Rectangle [] oldRectangles = rectangles; |
| boolean oldStippled = stippled; |
| 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 = newX; |
| event.y = newY; |
| if ((style & SWT.RESIZE) != 0) { |
| if (isMirrored) { |
| resizeRectangles (oldX - newX, newY - oldY); |
| } else { |
| resizeRectangles (newX - oldX, newY - oldY); |
| } |
| inEvent = true; |
| sendEvent (SWT.Resize, event); |
| inEvent = false; |
| /* |
| * 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 LRESULT.ONE; |
| } |
| boolean 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 != oldRectangles) { |
| int length = rectangles.length; |
| if (length != rectsToErase.length) { |
| draw = true; |
| } else { |
| for (int i = 0; i < length; i++) { |
| if (!rectangles [i].equals (rectsToErase [i])) { |
| draw = true; |
| break; |
| } |
| } |
| } |
| } |
| else { |
| draw = true; |
| } |
| if (draw) { |
| drawRectangles (rectsToErase, oldStippled); |
| update (); |
| drawRectangles (rectangles, stippled); |
| } |
| Point cursorPos = adjustResizeCursor (); |
| if (cursorPos != null) { |
| newX = cursorPos.x; |
| newY = cursorPos.y; |
| } |
| } else { |
| if (isMirrored) { |
| moveRectangles (oldX - newX, newY - oldY); |
| } else { |
| moveRectangles (newX - oldX, newY - oldY); |
| } |
| inEvent = true; |
| sendEvent (SWT.Move, event); |
| inEvent = false; |
| /* |
| * 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 LRESULT.ONE; |
| } |
| boolean 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 != oldRectangles) { |
| int length = rectangles.length; |
| if (length != rectsToErase.length) { |
| draw = true; |
| } else { |
| for (int i = 0; i < length; i++) { |
| if (!rectangles [i].equals (rectsToErase [i])) { |
| draw = true; |
| break; |
| } |
| } |
| } |
| } else { |
| draw = true; |
| } |
| if (draw) { |
| drawRectangles (rectsToErase, oldStippled); |
| update (); |
| drawRectangles (rectangles, stippled); |
| } |
| } |
| oldX = newX; |
| oldY = newY; |
| } |
| tracking = message != OS.WM_LBUTTONUP; |
| return null; |
| } |
| |
| } |