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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/Tracker.java')
| -rwxr-xr-x | bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/Tracker.java | 983 |
1 files changed, 983 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/Tracker.java b/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/Tracker.java new file mode 100755 index 0000000000..b7d096f337 --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/Tracker.java @@ -0,0 +1,983 @@ +/******************************************************************************* + * 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.motif.*; +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 tracking, cancelled, stippled; + Rectangle [] rectangles = new Rectangle [0], proportions = rectangles; + Rectangle bounds; + int cursorOrientation = SWT.NONE; + Cursor cursor; + int window, 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>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; + final int unused[] = new int[1]; + int actualX[] = new int[1]; + int actualY[] = new int[1]; + + int newX = bounds.x + bounds.width / 2; + int newY = bounds.y; + + int xDisplay = display.xDisplay; + OS.XWarpPointer (xDisplay, OS.None, window, 0, 0, 0, 0, newX, newY); + /* + * 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. + */ + OS.XQueryPointer (xDisplay, window, unused, unused, actualX, actualY, unused, unused, unused); + return new Point (actualX[0], actualY[0]); +} +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; + } + + final int unused[] = new int[1]; + int actualX[] = new int[1]; + int actualY[] = new int[1]; + int xDisplay = display.xDisplay; + OS.XWarpPointer (xDisplay, 0, window, 0, 0, 0, 0, newX, newY); + /* + * 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. + */ + OS.XQueryPointer (xDisplay, window, unused, unused, actualX, actualY, unused, unused, unused); + return new Point (actualX[0], actualY[0]); +} +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; +} + +void drawRectangles (Rectangle [] rects, boolean stippled) { + int xDisplay = display.xDisplay; + int color = OS.XWhitePixel (xDisplay, 0); + int xWindow = OS.XDefaultRootWindow (xDisplay); + if (parent != null) { + xWindow = OS.XtWindow (parent.handle); + if (xWindow == 0) return; + int foreground = parent.getForegroundPixel (); + Control control = parent.findBackgroundControl (); + if (control == null) control = parent; + int background = control.getBackgroundPixel (); + color = foreground ^ background; + } + int gc = OS.XCreateGC (xDisplay, xWindow, 0, null); + OS.XSetForeground (xDisplay, gc, color); + OS.XSetSubwindowMode (xDisplay, gc, OS.IncludeInferiors); + OS.XSetFunction (xDisplay, gc, OS.GXxor); + int stipplePixmap = 0; + if (stippled) { + byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0}; + stipplePixmap = OS.XCreateBitmapFromData (xDisplay, xWindow, bits, 8, 8); + OS.XSetStipple (xDisplay, gc, stipplePixmap); + OS.XSetFillStyle (xDisplay, gc, OS.FillStippled); + OS.XSetLineAttributes (xDisplay, gc, 3, OS.LineSolid, OS.CapButt, OS.JoinMiter); + } + for (int i=0; i<rects.length; i++) { + Rectangle rect = rects [i]; + OS.XDrawRectangle (xDisplay, xWindow, gc, rect.x, rect.y, rect.width, rect.height); + } + if (stippled) { + OS.XFreePixmap (xDisplay, stipplePixmap); + } + OS.XFreeGC (xDisplay, 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 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 (); + int xDisplay = display.xDisplay; + window = OS.XDefaultRootWindow (xDisplay); + if (parent != null) { + window = OS.XtWindow (parent.handle); + if (window == 0) return false; + } + cancelled = false; + tracking = true; + update (); + drawRectangles (rectangles, stippled); + int [] oldX = new int [1], oldY = new int [1]; + int [] unused = new int [1], mask = new int [1]; + OS.XQueryPointer (xDisplay, window, unused, unused, oldX, oldY, unused, unused, mask); + + /* + * 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; + } + + int mouseMasks = OS.Button1Mask | OS.Button2Mask | OS.Button3Mask; + boolean mouseDown = (mask [0] & mouseMasks) != 0; + if (!mouseDown) { + Point cursorPos = null; + if ((style & SWT.RESIZE) != 0) { + cursorPos = adjustResizeCursor (); + } else { + cursorPos = adjustMoveCursor (); + } + if (cursorPos != null) { + oldX [0] = cursorPos.x; + oldY [0] = cursorPos.y; + } + } + this.oldX = oldX [0]; + this.oldY = oldY [0]; + + int ptrGrabResult = OS.XGrabPointer (xDisplay, window, 0, + OS.ButtonPressMask | OS.ButtonReleaseMask | OS.PointerMotionMask, + OS.GrabModeAsync, OS.GrabModeAsync, OS.None, OS.None, OS.CurrentTime); + int kbdGrabResult = OS.XGrabKeyboard (xDisplay, window, 0, + OS.GrabModeAsync, OS.GrabModeAsync, OS.CurrentTime); + + /* Tracker behaves like a Dialog with its own OS event loop. */ + XAnyEvent anyEvent = new XAnyEvent(); + int xEvent = OS.XtMalloc (XEvent.sizeof); + int dispatch = OS.XtMalloc (4); + int xtContext = OS.XtDisplayToApplicationContext (xDisplay); + while (tracking) { + if (parent != null && parent.isDisposed ()) break; + OS.XtAppNextEvent (xtContext, xEvent); + OS.memmove (anyEvent, xEvent, XAnyEvent.sizeof); + int widget = OS.XtWindowToWidget (anyEvent.display, anyEvent.window); + switch (anyEvent.type) { + case OS.MotionNotify: XPointerMotion (widget, 0, xEvent, dispatch); break; + case OS.ButtonRelease: XButtonRelease (widget, 0, xEvent, dispatch); break; + case OS.KeyPress: XKeyPress (widget, 0, xEvent, dispatch); break; + case OS.KeyRelease: XKeyRelease (widget, 0, xEvent, dispatch); break; + case OS.ButtonPress: + case OS.EnterNotify: + case OS.LeaveNotify: + /* Do not dispatch these */ + break; + case OS.Expose: + update (); + drawRectangles (rectangles, stippled); + OS.XtDispatchEvent (xEvent); + drawRectangles (rectangles, stippled); + break; + default: + OS.XtDispatchEvent (xEvent); + } + } + if (xEvent != 0) OS.XtFree (xEvent); + if (dispatch != 0) OS.XtFree (dispatch); + if (!isDisposed()) { + update (); + drawRectangles (rectangles, stippled); + } + if (ptrGrabResult == OS.GrabSuccess) OS.XUngrabPointer (xDisplay, OS.CurrentTime); + if (kbdGrabResult == OS.GrabSuccess) OS.XUngrabKeyboard (xDisplay, OS.CurrentTime); + window = 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 releaseWidget () { + super.releaseWidget (); + parent = null; + rectangles = proportions = null; + bounds = null; +} +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 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 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; +} +void update () { + if (parent != null) { + if (parent.isDisposed ()) return; + parent.getShell ().update (); + } else { + display.update (); + } +} +int XButtonRelease (int w, int client_data, int call_data, int continue_to_dispatch) { + return xMouse (OS.ButtonRelease, w, client_data, call_data, continue_to_dispatch); +} + +int XKeyPress (int w, int client_data, int call_data, int continue_to_dispatch) { + int result = super.XKeyPress (w, client_data, call_data, continue_to_dispatch); + if (result != 0) return result; + XKeyEvent keyEvent = new XKeyEvent (); + OS.memmove (keyEvent, call_data, XKeyEvent.sizeof); + if (keyEvent.keycode != 0) { + int [] keysym = new int [1]; + OS.XLookupString (keyEvent, null, 0, keysym, null); + keysym [0] &= 0xFFFF; + int xChange = 0, yChange = 0; + int stepSize = ((keyEvent.state & OS.ControlMask) != 0) ? STEPSIZE_SMALL : STEPSIZE_LARGE; + switch (keysym [0]) { + case OS.XK_KP_Enter: + case OS.XK_Return: + tracking = false; + /* Eat the subsequent KeyRelease event */ + OS.XtAppNextEvent (OS.XtDisplayToApplicationContext (keyEvent.display), call_data); + break; + case OS.XK_Escape: + tracking = false; + cancelled = true; + /* Eat the subsequent KeyRelease event */ + OS.XtAppNextEvent (OS.XtDisplayToApplicationContext (keyEvent.display), call_data); + break; + case OS.XK_Left: + xChange = -stepSize; + break; + case OS.XK_Right: + xChange = stepSize; + break; + case OS.XK_Up: + yChange = -stepSize; + break; + case OS.XK_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); + sendEvent (SWT.Resize, event); + /* + * It is possible (but unlikely) that application code + * could have disposed the widget in the resize event. + * If this happens then return false to indicate that + * the move failed. + */ + if (isDisposed ()) { + cancelled = true; + return 1; + } + 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); + sendEvent (SWT.Move, event); + /* + * It is possible (but unlikely) that application code + * could have disposed the widget in the move event. + * If this happens then return false to indicate that + * the move failed. + */ + if (isDisposed ()) { + cancelled = true; + return 1; + } + 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; +} + +int XPointerMotion (int w, int client_data, int call_data, int continue_to_dispatch) { + if (cursor != null) { + int xDisplay = display.xDisplay; + OS.XChangeActivePointerGrab (xDisplay, + OS.ButtonPressMask | OS.ButtonReleaseMask | OS.PointerMotionMask, + cursor.handle, OS.CurrentTime); + } + return xMouse (OS.MotionNotify, w, client_data, call_data, continue_to_dispatch); +} + +int xMouse (int type, int w, int client_data, int call_data, int continue_to_dispatch) { + int xDisplay = display.xDisplay; + int [] newX = new int [1], newY = new int [1], unused = new int [1]; + OS.XQueryPointer (xDisplay, window, unused, unused, newX, newY, unused, unused, unused); + if (oldX != newX [0] || oldY != newY [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 = newX [0]; + event.y = newY [0]; + if ((style & SWT.RESIZE) != 0) { + resizeRectangles (newX [0] - oldX, newY [0] - oldY); + sendEvent (SWT.Resize, event); + /* + * It is possible (but unlikely) that application code + * could have disposed the widget in the resize event. + * If this happens then return false to indicate that + * the move failed. + */ + if (isDisposed ()) { + cancelled = true; + return 1; + } + 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 [0] = cursorPos.x; + newY [0] = cursorPos.y; + } + } else { + moveRectangles (newX [0] - oldX, newY [0] - oldY); + sendEvent (SWT.Move, event); + /* + * It is possible (but unlikely) that application code + * could have disposed the widget in the move event. + * If this happens then return false to indicate that + * the move failed. + */ + if (isDisposed ()) { + cancelled = true; + return 1; + } + 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 [0]; + oldY = newY [0]; + } + tracking = type != OS.ButtonRelease; + return 0; +} + +} |