| /******************************************************************************* |
| * Copyright (c) 2000, 2016 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.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| |
| /** |
| * 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; |
| Cursor cursor; |
| long /*int*/ lastCursor, window, overlay; |
| boolean tracking, cancelled, grabbed, stippled; |
| Rectangle [] rectangles = new Rectangle [0], proportions = rectangles; |
| Rectangle bounds; |
| int cursorOrientation = SWT.NONE; |
| int oldX, oldY; |
| |
| final static int STEPSIZE_SMALL = 1; |
| final static int STEPSIZE_LARGE = 9; |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>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.mapInPixels (parent, null, newX, newY); |
| display.setCursorLocation (point); |
| |
| /* |
| * The call to XWarpPointer does not always place the pointer on the |
| * exact location that is specified, so do a query (below) to get the |
| * actual location of the pointer after it has been moved. |
| */ |
| int [] actualX = new int [1], actualY = new int [1], state = new int [1]; |
| gdk_window_get_device_position (window, actualX, actualY, state); |
| 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; |
| } |
| |
| Point point = display.mapInPixels (parent, null, newX, newY); |
| display.setCursorLocation (point); |
| |
| /* |
| * The call to XWarpPointer does not always place the pointer on the |
| * exact location that is specified, so do a query (below) to get the |
| * actual location of the pointer after it has been moved. |
| */ |
| int [] actualX = new int [1], actualY = new int [1], state = new int [1]; |
| gdk_window_get_device_position (window, actualX, actualY, state); |
| return new Point (actualX [0], actualY [0]); |
| } |
| |
| |
| /** |
| * 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; |
| } |
| |
| 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; |
| } |
| |
| 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) { |
| long /*int*/ window = OS.gdk_get_default_root_window(); |
| if (parent != null) { |
| window = gtk_widget_get_window (parent.paintHandle()); |
| } |
| if (window == 0) return; |
| if (OS.GTK3) { |
| if (overlay == 0) return; |
| OS.gtk_widget_shape_combine_region (overlay, 0); |
| long /*int*/ region = OS.gdk_region_new (); |
| GdkRectangle rect = new GdkRectangle(); |
| for (int i = 0; i < rects.length; i++) { |
| Rectangle r = parent != null ? display.mapInPixels(parent, null, rects[i]) : rects[i]; |
| rect.x = r.x; |
| rect.y = r.y; |
| rect.width = r.width + 1; |
| rect.height = 1; |
| OS.gdk_region_union_with_rect(region, rect); |
| rect.width = 1; |
| rect.height = r.height + 1; |
| OS.gdk_region_union_with_rect(region, rect); |
| rect.x = r.x + r.width; |
| OS.gdk_region_union_with_rect(region, rect); |
| rect.x = r.x; |
| rect.y = r.y + r.height; |
| rect.width = r.width + 1; |
| rect.height = 1; |
| OS.gdk_region_union_with_rect(region, rect); |
| } |
| OS.gtk_widget_shape_combine_region (overlay, region); |
| OS.gdk_region_destroy (region); |
| long /*int*/ overlayWindow = OS.gtk_widget_get_window (overlay); |
| OS.gdk_window_hide (overlayWindow); |
| OS.gdk_window_show (overlayWindow); |
| return; |
| } |
| long /*int*/ gc = OS.gdk_gc_new (window); |
| if (gc == 0) return; |
| long /*int*/ colormap = OS.gdk_colormap_get_system (); |
| GdkColor color = new GdkColor (); |
| OS.gdk_color_white (colormap, color); |
| OS.gdk_gc_set_foreground (gc, color); |
| OS.gdk_gc_set_subwindow (gc, OS.GDK_INCLUDE_INFERIORS); |
| OS.gdk_gc_set_function (gc, OS.GDK_XOR); |
| for (int i=0; i<rects.length; i++) { |
| Rectangle rect = rects [i]; |
| int x = rect.x; |
| if (parent != null && (parent.style & SWT.MIRRORED) != 0) x = parent.getClientWidth () - rect.width - x; |
| OS.gdk_draw_rectangle (window, gc, 0, x, rect.y, rect.width, rect.height); |
| } |
| OS.g_object_unref (gc); |
| } |
| |
| /** |
| * Returns the bounds that are being drawn, expressed relative to the parent |
| * widget. If the parent is a <code>Display</code> then these are screen |
| * coordinates. |
| * |
| * @return the bounds of the Rectangles being drawn |
| * |
| * @exception 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] = DPIUtil.autoScaleDown (new Rectangle (current.x, current.y, current.width, current.height)); |
| } |
| return result; |
| } |
| |
| Rectangle [] getRectanglesInPixels () { |
| 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; |
| } |
| |
| boolean grab () { |
| long /*int*/ cursor = this.cursor != null ? this.cursor.handle : 0; |
| int result = gdk_pointer_grab (window, OS.GDK_OWNERSHIP_NONE, false, OS.GDK_POINTER_MOTION_MASK | OS.GDK_BUTTON_RELEASE_MASK, window, cursor, OS.GDK_CURRENT_TIME); |
| return result == OS.GDK_GRAB_SUCCESS; |
| } |
| |
| @Override |
| long /*int*/ gtk_button_release_event (long /*int*/ widget, long /*int*/ event) { |
| return gtk_mouse (OS.GDK_BUTTON_RELEASE, widget, event); |
| } |
| |
| @Override |
| long /*int*/ gtk_key_press_event (long /*int*/ widget, long /*int*/ eventPtr) { |
| long /*int*/ result = super.gtk_key_press_event (widget, eventPtr); |
| if (result != 0) return result; |
| GdkEventKey keyEvent = new GdkEventKey (); |
| OS.memmove (keyEvent, eventPtr, GdkEventKey.sizeof); |
| int stepSize = ((keyEvent.state & OS.GDK_CONTROL_MASK) != 0) ? STEPSIZE_SMALL : STEPSIZE_LARGE; |
| int xChange = 0, yChange = 0; |
| switch (keyEvent.keyval) { |
| case OS.GDK_Escape: |
| cancelled = true; |
| // fallthrough |
| case OS.GDK_Return: |
| tracking = false; |
| break; |
| case OS.GDK_Left: |
| xChange = -stepSize; |
| break; |
| case OS.GDK_Right: |
| xChange = stepSize; |
| break; |
| case OS.GDK_Up: |
| yChange = -stepSize; |
| break; |
| case OS.GDK_Down: |
| yChange = stepSize; |
| break; |
| } |
| if (xChange != 0 || yChange != 0) { |
| Rectangle [] oldRectangles = rectangles; |
| Rectangle [] rectsToErase = new Rectangle [rectangles.length]; |
| for (int i = 0; i < rectangles.length; i++) { |
| Rectangle current = rectangles [i]; |
| rectsToErase [i] = new Rectangle (current.x, current.y, current.width, current.height); |
| } |
| Event event = new Event (); |
| Rectangle eventRect = new Rectangle (oldX + xChange, oldY + yChange, 0, 0); |
| event.setBounds (DPIUtil.autoScaleDown (eventRect)); |
| if (parent != null && (parent.style & SWT.MIRRORED) != 0) { |
| event.x = DPIUtil.autoScaleDown (parent.getClientWidth ()) - event.width - event.x; |
| } |
| 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 return false to indicate |
| * that the tracking has 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) { |
| if (!OS.GTK3) { |
| drawRectangles (rectsToErase); |
| update (); |
| } |
| drawRectangles (rectangles); |
| } |
| Point cursorPos = adjustResizeCursor (); |
| if (cursorPos != null) { |
| oldX = cursorPos.x; |
| oldY = cursorPos.y; |
| } |
| } 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 return false to indicate |
| * that the tracking has 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); |
| update (); |
| drawRectangles (rectangles); |
| } |
| Point cursorPos = adjustMoveCursor (); |
| if (cursorPos != null) { |
| oldX = cursorPos.x; |
| oldY = cursorPos.y; |
| } |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| long /*int*/ gtk_motion_notify_event (long /*int*/ widget, long /*int*/ eventPtr) { |
| long /*int*/ cursor = this.cursor != null ? this.cursor.handle : 0; |
| if (cursor != lastCursor) { |
| ungrab (); |
| grabbed = grab (); |
| lastCursor = cursor; |
| } |
| return gtk_mouse (OS.GDK_MOTION_NOTIFY, widget, eventPtr); |
| } |
| |
| long /*int*/ gtk_mouse (int eventType, long /*int*/ widget, long /*int*/ eventPtr) { |
| int [] newX = new int [1], newY = new int [1]; |
| gdk_window_get_device_position (window, newX, newY, null); |
| if (oldX != newX [0] || oldY != newY [0]) { |
| Rectangle [] oldRectangles = rectangles; |
| Rectangle [] rectsToErase = new Rectangle [rectangles.length]; |
| for (int i = 0; i < rectangles.length; i++) { |
| Rectangle current = rectangles [i]; |
| rectsToErase [i] = new Rectangle (current.x, current.y, current.width, current.height); |
| } |
| Event event = new Event (); |
| if (parent == null) { |
| Rectangle eventRect = new Rectangle (newX [0], newY [0], 0, 0); |
| event.setBounds (DPIUtil.autoScaleDown (eventRect)); |
| } else { |
| Point screenCoord = display.mapInPixels (parent, null, newX [0], newY [0]); |
| Rectangle eventRect = new Rectangle (screenCoord.x, screenCoord.y, 0, 0); |
| event.setBounds (DPIUtil.autoScaleDown (eventRect)); |
| } |
| 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, return false to indicate |
| * that the tracking has 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) { |
| if (!OS.GTK3) { |
| drawRectangles (rectsToErase); |
| update (); |
| } |
| drawRectangles (rectangles); |
| } |
| 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, return false to indicate |
| * that the tracking has 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) { |
| if (!OS.GTK3) { |
| drawRectangles (rectsToErase); |
| update (); |
| } |
| drawRectangles (rectangles); |
| } |
| } |
| oldX = newX [0]; |
| oldY = newY [0]; |
| } |
| tracking = eventType != OS.GDK_BUTTON_RELEASE; |
| return 0; |
| } |
| |
| 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; |
| if (parent != null && (parent.style & SWT.MIRRORED) != 0) xChange *= -1; |
| bounds.x += xChange; bounds.y += yChange; |
| for (int i = 0; i < rectangles.length; i++) { |
| rectangles [i].x += xChange; |
| rectangles [i].y += yChange; |
| } |
| } |
| |
| /** |
| * Displays the Tracker rectangles for manipulation by the user. Returns when |
| * the user has either finished manipulating the rectangles or has cancelled the |
| * Tracker. |
| * |
| * @return <code>true</code> if the user did not cancel the Tracker, <code>false</code> otherwise |
| * |
| * @exception 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(); |
| window = OS.gdk_get_default_root_window(); |
| if (parent != null) { |
| window = gtk_widget_get_window (parent.paintHandle()); |
| } |
| if (window == 0) return false; |
| cancelled = false; |
| tracking = true; |
| if (!OS.GTK3) { |
| update (); |
| drawRectangles (rectangles); |
| } |
| int [] oldX = new int [1], oldY = new int [1], state = new int [1]; |
| gdk_window_get_device_position (window, oldX, oldY, state); |
| |
| /* |
| * if exactly one of UP/DOWN is specified as a style then set the cursor |
| * orientation accordingly (the same is done for LEFT/RIGHT styles below) |
| */ |
| int vStyle = style & (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 mask = OS.GDK_BUTTON1_MASK | OS.GDK_BUTTON2_MASK | OS.GDK_BUTTON3_MASK; |
| boolean mouseDown = (state [0] & mask) != 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]; |
| |
| grabbed = grab (); |
| lastCursor = this.cursor != null ? this.cursor.handle : 0; |
| |
| if (OS.GTK3) { |
| overlay = OS.gtk_window_new (OS.GTK_WINDOW_POPUP); |
| OS.gtk_window_set_skip_taskbar_hint (overlay, true); |
| OS.gtk_window_set_title (overlay, new byte [1]); |
| OS.gtk_widget_realize (overlay); |
| long /*int*/ overlayWindow = OS.gtk_widget_get_window (overlay); |
| OS.gdk_window_set_override_redirect (overlayWindow, true); |
| if (OS.GTK_VERSION < OS.VERSION (3, 16, 0)) { |
| OS.gtk_widget_override_background_color (overlay, OS.GTK_STATE_FLAG_NORMAL, new GdkRGBA()); |
| } else { |
| String name = OS.GTK_VERSION >= OS.VERSION(3, 20, 0) ? "window" : "GtkWindow"; |
| String css = name + " {background-color: rgb(0,0,0);}"; |
| long /*int*/ provider = 0; |
| long /*int*/ context = OS.gtk_widget_get_style_context (overlay); |
| if (provider == 0) { |
| provider = OS.gtk_css_provider_new (); |
| OS.gtk_style_context_add_provider (context, provider, OS.GTK_STYLE_PROVIDER_PRIORITY_APPLICATION); |
| OS.g_object_unref (provider); |
| } |
| OS.gtk_css_provider_load_from_data (provider, Converter.wcsToMbcs (null, css, true), -1, null); |
| } |
| long /*int*/ region = OS.gdk_region_new (); |
| OS.gtk_widget_shape_combine_region (overlay, region); |
| OS.gtk_widget_input_shape_combine_region (overlay, region); |
| OS.gdk_region_destroy (region); |
| Rectangle bounds = display.getBoundsInPixels(); |
| OS.gtk_window_move (overlay, bounds.x, bounds.y); |
| OS.gtk_window_resize (overlay, bounds.width, bounds.height); |
| OS.gtk_widget_show (overlay); |
| } |
| |
| /* Tracker behaves like a Dialog with its own OS event loop. */ |
| Display display = this.display; |
| Tracker oldTracker = display.tracker; |
| display.tracker = this; |
| try { |
| while (tracking) { |
| if (parent != null && parent.isDisposed ()) break; |
| display.runSkin (); |
| display.runDeferredLayouts (); |
| display.sendPreExternalEventDispatchEvent (); |
| /* |
| * This call to gdk_threads_leave() is a temporary work around |
| * to avoid deadlocks when gdk_threads_init() is called by native |
| * code outside of SWT (i.e AWT, etc). It ensures that the current |
| * thread leaves the GTK lock before calling the function below. |
| */ |
| OS.gdk_threads_leave(); |
| OS.g_main_context_iteration (0, true); |
| display.sendPostExternalEventDispatchEvent (); |
| display.runAsyncMessages (false); |
| } |
| } finally { |
| display.tracker = oldTracker; |
| } |
| if (!isDisposed ()) { |
| if (!OS.GTK3) { |
| update (); |
| drawRectangles (rectangles); |
| } |
| } |
| ungrab (); |
| if (overlay != 0) { |
| OS.gtk_widget_destroy (overlay); |
| overlay = 0; |
| } |
| window = 0; |
| return !cancelled; |
| } |
| |
| boolean processEvent (long /*int*/ eventPtr) { |
| GdkEvent gdkEvent = new GdkEvent(); |
| OS.memmove (gdkEvent, eventPtr, GdkEvent.sizeof); |
| long /*int*/ widget = OS.gtk_get_event_widget (eventPtr); |
| switch (gdkEvent.type) { |
| case OS.GDK_MOTION_NOTIFY: gtk_motion_notify_event (widget, eventPtr); break; |
| case OS.GDK_BUTTON_RELEASE: gtk_button_release_event (widget, eventPtr); break; |
| case OS.GDK_KEY_PRESS: gtk_key_press_event (widget, eventPtr); break; |
| case OS.GDK_KEY_RELEASE: gtk_key_release_event (widget, eventPtr); break; |
| case OS.GDK_BUTTON_PRESS: |
| case OS.GDK_2BUTTON_PRESS: |
| case OS.GDK_3BUTTON_PRESS: |
| case OS.GDK_ENTER_NOTIFY: |
| case OS.GDK_LEAVE_NOTIFY: |
| /* Do not dispatch these */ |
| break; |
| case OS.GDK_EXPOSE: |
| update (); |
| if (!OS.GTK3) drawRectangles (rectangles); |
| OS.gtk_main_do_event (eventPtr); |
| if (!OS.GTK3) drawRectangles (rectangles); |
| break; |
| default: |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| void releaseWidget () { |
| super.releaseWidget (); |
| parent = null; |
| rectangles = proportions = null; |
| bounds = null; |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the control is moved or resized. |
| * |
| * @param listener the listener which should no longer be notified |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
| * </ul> |
| * @exception 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 (parent != null && (parent.style & SWT.MIRRORED) != 0) xChange *= -1; |
| /* |
| * If the cursor orientation has not been set in the orientation of |
| * this change then try to set it here. |
| */ |
| if (xChange < 0 && ((style & 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 (); |
| cursor = newCursor; |
| } |
| |
| /** |
| * 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; |
| for (int i = 0; i < length; i++) { |
| rectangles [i] = DPIUtil.autoScaleUp (rectangles [i]); |
| } |
| setRectanglesInPixels (rectangles); |
| } |
| |
| void setRectanglesInPixels (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; |
| } |
| |
| void ungrab () { |
| if (grabbed) gdk_pointer_ungrab (window, OS.GDK_CURRENT_TIME); |
| } |
| |
| void update () { |
| if (parent != null) { |
| if (parent.isDisposed ()) return; |
| parent.getShell ().update (); |
| } else { |
| display.update (); |
| } |
| } |
| |
| } |