/*******************************************************************************
* Copyright (c) 2000, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.internal.wpf.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
/**
* Instances of this class implement rubber banding rectangles that are
* drawn onto a parent <code>Composite</code> or <code>Display</code>.
* These rectangles can be specified to respond to mouse and key events
* by either moving or resizing themselves accordingly. Trackers are
* typically used to represent window geometries in a lightweight manner.
*
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>LEFT, RIGHT, UP, DOWN, RESIZE</dd>
* <dt><b>Events:</b></dt>
* <dd>Move, Resize</dd>
* </dl>
* <p>
* Note: Rectangle move behavior is assumed unless RESIZE is specified.
* </p><p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#tracker">Tracker snippets</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Tracker extends Widget {
Composite parent;
boolean cancelled, stippled;
Rectangle [] rectangles, proportions;
Rectangle bounds;
Cursor clientCursor;
int resizeCursor, cursorOrientation = SWT.NONE;
int oldX, oldY;
int canvasHandle;
int frame;
/*
* The following values mirror step sizes on Windows
*/
final static int STEPSIZE_SMALL = 1;
final static int STEPSIZE_LARGE = 9;
/**
* Constructs a new instance of this class given its parent
* and a style value describing its behavior and appearance.
* <p>
* The style value is either one of the style constants defined in
* class <code>SWT</code> which is applicable to instances of this
* class, or must be built by <em>bitwise OR</em>'ing together
* (that is, using the <code>int</code> "|" operator) two or more
* of those <code>SWT</code> style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
* </p>
*
* @param parent a widget which will be the parent of the new instance (cannot be null)
* @param style the style of widget to construct
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#UP
* @see SWT#DOWN
* @see SWT#RESIZE
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Tracker (Composite parent, int style) {
super (parent, checkStyle (style));
this.parent = parent;
}
/**
* Constructs a new instance of this class given the display
* to create it on and a style value describing its behavior
* and appearance.
* <p>
* The style value is either one of the style constants defined in
* class <code>SWT</code> which is applicable to instances of this
* class, or must be built by <em>bitwise OR</em>'ing together
* (that is, using the <code>int</code> "|" operator) two or more
* of those <code>SWT</code> style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
* </p><p>
* Note: Currently, null can be passed in for the display argument.
* This has the effect of creating the tracker on the currently active
* display if there is one. If there is no current display, the
* tracker is created on a "default" display. <b>Passing in null as
* the display argument is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @param display the display to create the tracker on
* @param style the style of control to construct
*
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#UP
* @see SWT#DOWN
* @see SWT#RESIZE
*/
public Tracker (Display display, int style) {
if (display == null) display = Display.getCurrent ();
if (display == null) display = Display.getDefault ();
if (!display.isValidThread ()) {
error (SWT.ERROR_THREAD_INVALID_ACCESS);
}
this.style = checkStyle (style);
this.display = display;
reskinWidget ();
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the control is moved or resized, by sending
* it one of the messages defined in the <code>ControlListener</code>
* interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see ControlListener
* @see #removeControlListener
*/
public void addControlListener (ControlListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Resize, typedListener);
addListener (SWT.Move, typedListener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when keys are pressed and released on the system keyboard, by sending
* it one of the messages defined in the <code>KeyListener</code>
* interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see KeyListener
* @see #removeKeyListener
*/
public void addKeyListener (KeyListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.KeyUp,typedListener);
addListener (SWT.KeyDown,typedListener);
}
Point adjustMoveCursor () {
if (bounds == null) return null;
int newX = bounds.x + bounds.width / 2;
int newY = bounds.y;
Point point = display.map (parent, null, newX, newY);
display.setCursorLocation (point);
return point;
}
Point adjustResizeCursor () {
if (bounds == null) return null;
int newX, newY;
if ((cursorOrientation & SWT.LEFT) != 0) {
newX = bounds.x;
} else if ((cursorOrientation & SWT.RIGHT) != 0) {
newX = bounds.x + bounds.width;
} else {
newX = bounds.x + bounds.width / 2;
}
if ((cursorOrientation & SWT.UP) != 0) {
newY = bounds.y;
} else if ((cursorOrientation & SWT.DOWN) != 0) {
newY = bounds.y + bounds.height;
} else {
newY = bounds.y + bounds.height / 2;
}
Point point = display.map (parent, null, newX, newY);
display.setCursorLocation (point);
/*
* If the client has not provided a custom cursor then determine
* the appropriate resize cursor.
*/
if (clientCursor == null) {
int newCursor = 0;
switch (cursorOrientation) {
case SWT.UP:
newCursor = OS.Cursors_SizeNS ();
break;
case SWT.DOWN:
newCursor = OS.Cursors_SizeNS ();
break;
case SWT.LEFT:
newCursor = OS.Cursors_SizeWE ();
break;
case SWT.RIGHT:
newCursor = OS.Cursors_SizeWE ();
break;
case SWT.LEFT | SWT.UP:
newCursor = OS.Cursors_SizeNWSE ();
break;
case SWT.RIGHT | SWT.DOWN:
newCursor = OS.Cursors_SizeNWSE ();
break;
case SWT.LEFT | SWT.DOWN:
newCursor = OS.Cursors_SizeNESW ();
break;
case SWT.RIGHT | SWT.UP:
newCursor = OS.Cursors_SizeNESW ();
break;
default:
newCursor = OS.Cursors_SizeAll ();
break;
}
OS.FrameworkElement_Cursor (canvasHandle, newCursor);
if (resizeCursor != 0) {
OS.GCHandle_Free (resizeCursor);
}
resizeCursor = newCursor;
}
return point;
}
static int checkStyle (int style) {
if ((style & (SWT.LEFT | SWT.RIGHT | SWT.UP | SWT.DOWN)) == 0) {
style |= SWT.LEFT | SWT.RIGHT | SWT.UP | SWT.DOWN;
}
return style;
}
/**
* Stops displaying the tracker rectangles. Note that this is not considered
* to be a cancelation by the user.
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void close () {
checkWidget ();
if (frame != 0) OS.DispatcherFrame_Continue(frame, false);
}
Rectangle computeBounds () {
if (rectangles.length == 0) return null;
int xMin = rectangles [0].x;
int yMin = rectangles [0].y;
int xMax = rectangles [0].x + rectangles [0].width;
int yMax = rectangles [0].y + rectangles [0].height;
for (int i = 1; i < rectangles.length; i++) {
if (rectangles [i].x < xMin) xMin = rectangles [i].x;
if (rectangles [i].y < yMin) yMin = rectangles [i].y;
int rectRight = rectangles [i].x + rectangles [i].width;
if (rectRight > xMax) xMax = rectRight;
int rectBottom = rectangles [i].y + rectangles [i].height;
if (rectBottom > yMax) yMax = rectBottom;
}
return new Rectangle (xMin, yMin, xMax - xMin, yMax - yMin);
}
Rectangle [] computeProportions (Rectangle [] rects) {
Rectangle [] result = new Rectangle [rects.length];
bounds = computeBounds ();
if (bounds != null) {
for (int i = 0; i < rects.length; i++) {
int x = 0, y = 0, width = 0, height = 0;
if (bounds.width != 0) {
x = (rects [i].x - bounds.x) * 100 / bounds.width;
width = rects [i].width * 100 / bounds.width;
} else {
width = 100;
}
if (bounds.height != 0) {
y = (rects [i].y - bounds.y) * 100 / bounds.height;
height = rects [i].height * 100 / bounds.height;
} else {
height = 100;
}
result [i] = new Rectangle (x, y, width, height);
}
}
return result;
}
/**
* Draw the rectangles displayed by the tracker.
*/
void drawRectangles () {
Rectangle bounds = this.bounds;
if (bounds == null) return;
int children = OS.Panel_Children (canvasHandle);
OS.UIElementCollection_Clear (children);
if (parent != null) {
Rectangle rect = parent.getClientArea ();
rect.intersect (bounds);
bounds = rect;
Point pt = display.map (parent, null, bounds.x, bounds.y);
OS.Popup_HorizontalOffset (handle, pt.x);
OS.Popup_VerticalOffset (handle, pt.y);
} else {
OS.Popup_HorizontalOffset (handle, bounds.x);
OS.Popup_VerticalOffset (handle, bounds.y);
}
OS.FrameworkElement_Width (handle, bounds.width);
OS.FrameworkElement_Height (handle, bounds.height);
int stroke, brush;
if (stippled) {
stroke = 3;
int pixelFormat = OS.PixelFormats_BlackWhite ();
byte [] buffer = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0};
int image = OS.BitmapSource_Create (8, 8, 96, 96, pixelFormat, 0, buffer, buffer.length, 2);
OS.GCHandle_Free (pixelFormat);
brush = OS.gcnew_ImageBrush (image);
OS.TileBrush_TileMode (brush, OS.TileMode_Tile);
OS.TileBrush_Stretch (brush, OS.Stretch_Fill);
OS.TileBrush_ViewportUnits (brush, OS.BrushMappingMode_Absolute);
int rect = OS.gcnew_Rect (0, 0, OS.BitmapSource_PixelWidth(image), OS.BitmapSource_PixelHeight(image));
OS.TileBrush_Viewport (brush, rect);
OS.GCHandle_Free (rect);
OS.GCHandle_Free (image);
} else {
stroke = 1;
brush = OS.Brushes_Black ();
}
for (int i = 0; i < rectangles.length; i++) {
int child = OS.gcnew_Rectangle ();
OS.UIElementCollection_Add (children, child);
OS.Shape_StrokeThickness (child, stroke);
OS.Shape_Stroke (child, brush);
Rectangle rect = rectangles [i];
OS.Canvas_SetLeft (child, rect.x - bounds.x);
OS.Canvas_SetTop (child, rect.y - bounds.y);
OS.FrameworkElement_Width (child, rect.width);
OS.FrameworkElement_Height (child, rect.height);
OS.GCHandle_Free (child);
}
OS.GCHandle_Free (brush);
OS.GCHandle_Free (children);
}
/**
* Returns the bounds that are being drawn, expressed relative to the parent
* widget. If the parent is a <code>Display</code> then these are screen
* coordinates.
*
* @return the bounds of the Rectangles being drawn
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Rectangle [] getRectangles () {
checkWidget();
int length = 0;
if (rectangles != null) length = rectangles.length;
Rectangle [] result = new Rectangle [length];
for (int i = 0; i < length; i++) {
Rectangle current = rectangles [i];
result [i] = new Rectangle (current.x, current.y, current.width, current.height);
}
return result;
}
/**
* Returns <code>true</code> if the rectangles are drawn with a stippled line, <code>false</code> otherwise.
*
* @return the stippled effect of the rectangles
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public boolean getStippled () {
checkWidget ();
return stippled;
}
void HandleKeyUp (int sender, int e) {
if (handle == 0) return;
if (!sendKeyEvent (SWT.KeyUp, e, false)) return;
}
void HandleKeyDown (int sender, int e) {
if (handle == 0) return;
if (!sendKeyEvent (SWT.KeyDown, e, false)) return;
boolean ctrlDown = (OS.Keyboard_Modifiers() & OS.ModifierKeys_Control) != 0;
int stepSize = ctrlDown ? STEPSIZE_SMALL : STEPSIZE_LARGE;
int key = OS.KeyEventArgs_Key(e);
int xChange = 0, yChange = 0;
switch (key) {
case OS.Key_System:
case OS.Key_Escape:
cancelled = true;
if (frame != 0) OS.DispatcherFrame_Continue (frame, false);
break;
case OS.Key_Return:
if (frame != 0) OS.DispatcherFrame_Continue (frame, false);
break;
case OS.Key_Left:
xChange = -stepSize;
break;
case OS.Key_Right:
xChange = stepSize;
break;
case OS.Key_Up:
yChange = -stepSize;
break;
case OS.Key_Down:
yChange = stepSize;
break;
}
if (xChange != 0 || yChange != 0) {
Event event = new Event ();
event.x = oldX + xChange;
event.y = oldY + yChange;
Point cursorPos;
if ((style & SWT.RESIZE) != 0) {
resizeRectangles (xChange, yChange);
sendEvent (SWT.Resize, event);
if (isDisposed ()) {
cancelled = true;
if (frame != 0) OS.DispatcherFrame_Continue (frame, false);
return;
}
drawRectangles ();
cursorPos = adjustResizeCursor ();
} else {
moveRectangles (xChange, yChange);
sendEvent (SWT.Move, event);
if (isDisposed ()) {
cancelled = true;
if (frame != 0) OS.DispatcherFrame_Continue (frame, false);
return;
}
drawRectangles ();
cursorPos = adjustMoveCursor ();
}
oldX = cursorPos.x;
oldY = cursorPos.y;
}
}
void HandleMouseUp (int sender, int e) {
if (handle == 0) return;
if (!sendMouseEvent (SWT.MouseUp, e, false)) return;
if (frame != 0) OS.DispatcherFrame_Continue (frame, false);
}
void HandleMouseDown (int sender, int e) {
if (handle == 0) return;
if (!sendMouseEvent (SWT.MouseDown, e, false)) return;
if (frame != 0) OS.DispatcherFrame_Continue (frame, false);
}
void HandleMouseMove (int sender, int e) {
if (handle == 0) return;
if (!sendMouseEvent (SWT.MouseMove, e, false)) return;
int pointCanvas = OS.MouseEventArgs_GetPosition (e, canvasHandle);
int point = OS.Visual_PointToScreen (canvasHandle, pointCanvas);
int newX = (int) OS.Point_X (point);
int newY = (int) OS.Point_Y (point);
OS.GCHandle_Free (pointCanvas);
OS.GCHandle_Free (point);
if (newX != oldX || newY != oldY) {
Event event = new Event ();
event.x = newX;
event.y = newY;
if ((style & SWT.RESIZE) != 0) {
resizeRectangles (newX - oldX, newY - oldY);
sendEvent (SWT.Resize, event);
if (isDisposed ()) {
cancelled = true;
if (frame != 0) OS.DispatcherFrame_Continue (frame, false);
}
drawRectangles ();
Point cursorPos = adjustResizeCursor ();
if (cursorPos != null) {
newX = cursorPos.x;
newY = cursorPos.y;
}
} else {
moveRectangles (newX - oldX, newY - oldY);
sendEvent (SWT.Move, event);
if (isDisposed ()) {
cancelled = true;
if (frame != 0) OS.DispatcherFrame_Continue (frame, false);
}
drawRectangles ();
}
oldX = newX;
oldY = newY;
}
}
void moveRectangles (int xChange, int yChange) {
if (bounds == null) return;
if (xChange < 0 && ((style & SWT.LEFT) == 0)) xChange = 0;
if (xChange > 0 && ((style & SWT.RIGHT) == 0)) xChange = 0;
if (yChange < 0 && ((style & SWT.UP) == 0)) yChange = 0;
if (yChange > 0 && ((style & SWT.DOWN) == 0)) yChange = 0;
if (xChange == 0 && yChange == 0) return;
bounds.x += xChange; bounds.y += yChange;
for (int i = 0; i < rectangles.length; i++) {
rectangles [i].x += xChange;
rectangles [i].y += yChange;
}
}
/**
* Displays the Tracker rectangles for manipulation by the user. Returns when
* the user has either finished manipulating the rectangles or has cancelled the
* Tracker.
*
* @return <code>true</code> if the user did not cancel the Tracker, <code>false</code> otherwise
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public boolean open () {
checkWidget ();
if (rectangles == null) return false;
if (rectangles.length == 0) return false;
cancelled = false;
/*
* If exactly one of UP/DOWN is specified as a style then set the cursor
* orientation accordingly (the same is done for LEFT/RIGHT styles below).
*/
int vStyle = style & (SWT.UP | SWT.DOWN);
if (vStyle == SWT.UP || vStyle == SWT.DOWN) {
cursorOrientation |= vStyle;
}
int hStyle = style & (SWT.LEFT | SWT.RIGHT);
if (hStyle == SWT.LEFT || hStyle == SWT.RIGHT) {
cursorOrientation |= hStyle;
}
jniRef = OS.NewGlobalRef (this);
if (jniRef == 0) error (SWT.ERROR_NO_HANDLES);
handle = OS.gcnew_Popup ();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
OS.Popup_AllowsTransparency (handle, true);
canvasHandle = OS.gcnew_Canvas ();
if (canvasHandle == 0) error (SWT.ERROR_NO_HANDLES);
OS.Popup_Child (handle, canvasHandle);
OS.UIElement_IsHitTestVisible (canvasHandle, false);
OS.FrameworkElement_FocusVisualStyle (canvasHandle, 0);
if (clientCursor != null) {
OS.FrameworkElement_Cursor (canvasHandle, clientCursor.handle);
}
drawRectangles ();
OS.Popup_IsOpen (handle, true);
OS.UIElement_Focusable (canvasHandle, true);
OS.UIElement_Focus (canvasHandle);
OS.UIElement_CaptureMouse (canvasHandle);
boolean mouseDown = OS.Mouse_LeftButton() == OS.MouseButtonState_Pressed;
Point cursorPos;
if (mouseDown) {
int pointCanvas = OS.Mouse_GetPosition (canvasHandle);
int point = OS.Visual_PointToScreen (canvasHandle, pointCanvas);
cursorPos = new Point ((int) OS.Point_X (point), (int) OS.Point_Y (point));
OS.GCHandle_Free (pointCanvas);
OS.GCHandle_Free (point);
} else {
if ((style & SWT.RESIZE) != 0) {
cursorPos = adjustResizeCursor ();
} else {
cursorPos = adjustMoveCursor ();
}
}
oldX = cursorPos.x;
oldY = cursorPos.y;
int handler = OS.gcnew_KeyEventHandler (jniRef, "HandleKeyDown");
OS.UIElement_KeyDown (canvasHandle, handler);
OS.GCHandle_Free (handler);
handler = OS.gcnew_KeyEventHandler (jniRef, "HandleKeyUp");
OS.UIElement_KeyUp (canvasHandle, handler);
OS.GCHandle_Free (handler);
handler = OS.gcnew_MouseEventHandler (jniRef, "HandleMouseMove");
OS.UIElement_MouseMove (canvasHandle, handler);
OS.GCHandle_Free (handler);
handler = OS.gcnew_MouseButtonEventHandler (jniRef, "HandleMouseUp");
OS.UIElement_MouseUp (canvasHandle, handler);
OS.GCHandle_Free (handler);
handler = OS.gcnew_MouseButtonEventHandler (jniRef, "HandleMouseDown");
OS.UIElement_MouseDown (canvasHandle, handler);
OS.GCHandle_Free (handler);
/* Tracker behaves like a Dialog with its own OS event loop. */
frame = OS.gcnew_DispatcherFrame ();
OS.Dispatcher_PushFrame (frame);
if (resizeCursor != 0) {
OS.GCHandle_Free (resizeCursor);
resizeCursor = 0;
}
OS.UIElement_ReleaseMouseCapture (canvasHandle);
OS.Popup_IsOpen (handle, false);
OS.GCHandle_Free (canvasHandle);
OS.GCHandle_Free (handle);
if (frame != 0) OS.GCHandle_Free (frame);
OS.DeleteGlobalRef (jniRef);
jniRef = handle = canvasHandle = frame = 0;
return !cancelled;
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is moved or resized.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see ControlListener
* @see #addControlListener
*/
public void removeControlListener (ControlListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Resize, listener);
eventTable.unhook (SWT.Move, listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when keys are pressed and released on the system keyboard.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see KeyListener
* @see #addKeyListener
*/
public void removeKeyListener(KeyListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.KeyUp, listener);
eventTable.unhook (SWT.KeyDown, listener);
}
void resizeRectangles (int xChange, int yChange) {
if (bounds == null) return;
/*
* If the cursor orientation has not been set in the orientation of
* this change then try to set it here.
*/
if (xChange < 0 && ((style & SWT.LEFT) != 0) && ((cursorOrientation & SWT.RIGHT) == 0)) {
cursorOrientation |= SWT.LEFT;
}
if (xChange > 0 && ((style & SWT.RIGHT) != 0) && ((cursorOrientation & SWT.LEFT) == 0)) {
cursorOrientation |= SWT.RIGHT;
}
if (yChange < 0 && ((style & SWT.UP) != 0) && ((cursorOrientation & SWT.DOWN) == 0)) {
cursorOrientation |= SWT.UP;
}
if (yChange > 0 && ((style & SWT.DOWN) != 0) && ((cursorOrientation & SWT.UP) == 0)) {
cursorOrientation |= SWT.DOWN;
}
/*
* If the bounds will flip about the x or y axis then apply the adjustment
* up to the axis (ie.- where bounds width/height becomes 0), change the
* cursor's orientation accordingly, and flip each Rectangle's origin (only
* necessary for > 1 Rectangles)
*/
if ((cursorOrientation & SWT.LEFT) != 0) {
if (xChange > bounds.width) {
if ((style & SWT.RIGHT) == 0) return;
cursorOrientation |= SWT.RIGHT;
cursorOrientation &= ~SWT.LEFT;
bounds.x += bounds.width;
xChange -= bounds.width;
bounds.width = 0;
if (proportions.length > 1) {
for (int i = 0; i < proportions.length; i++) {
Rectangle proportion = proportions [i];
proportion.x = 100 - proportion.x - proportion.width;
}
}
}
} else if ((cursorOrientation & SWT.RIGHT) != 0) {
if (bounds.width < -xChange) {
if ((style & SWT.LEFT) == 0) return;
cursorOrientation |= SWT.LEFT;
cursorOrientation &= ~SWT.RIGHT;
xChange += bounds.width;
bounds.width = 0;
if (proportions.length > 1) {
for (int i = 0; i < proportions.length; i++) {
Rectangle proportion = proportions [i];
proportion.x = 100 - proportion.x - proportion.width;
}
}
}
}
if ((cursorOrientation & SWT.UP) != 0) {
if (yChange > bounds.height) {
if ((style & SWT.DOWN) == 0) return;
cursorOrientation |= SWT.DOWN;
cursorOrientation &= ~SWT.UP;
bounds.y += bounds.height;
yChange -= bounds.height;
bounds.height = 0;
if (proportions.length > 1) {
for (int i = 0; i < proportions.length; i++) {
Rectangle proportion = proportions [i];
proportion.y = 100 - proportion.y - proportion.height;
}
}
}
} else if ((cursorOrientation & SWT.DOWN) != 0) {
if (bounds.height < -yChange) {
if ((style & SWT.UP) == 0) return;
cursorOrientation |= SWT.UP;
cursorOrientation &= ~SWT.DOWN;
yChange += bounds.height;
bounds.height = 0;
if (proportions.length > 1) {
for (int i = 0; i < proportions.length; i++) {
Rectangle proportion = proportions [i];
proportion.y = 100 - proportion.y - proportion.height;
}
}
}
}
// apply the bounds adjustment
if ((cursorOrientation & SWT.LEFT) != 0) {
bounds.x += xChange;
bounds.width -= xChange;
} else if ((cursorOrientation & SWT.RIGHT) != 0) {
bounds.width += xChange;
}
if ((cursorOrientation & SWT.UP) != 0) {
bounds.y += yChange;
bounds.height -= yChange;
} else if ((cursorOrientation & SWT.DOWN) != 0) {
bounds.height += yChange;
}
Rectangle [] newRects = new Rectangle [rectangles.length];
for (int i = 0; i < rectangles.length; i++) {
Rectangle proportion = proportions[i];
newRects[i] = new Rectangle (
proportion.x * bounds.width / 100 + bounds.x,
proportion.y * bounds.height / 100 + bounds.y,
proportion.width * bounds.width / 100,
proportion.height * bounds.height / 100);
}
rectangles = newRects;
}
/**
* Sets the <code>Cursor</code> of the Tracker. If this cursor is <code>null</code>
* then the cursor reverts to the default.
*
* @param newCursor the new <code>Cursor</code> to display
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setCursor(Cursor newCursor) {
checkWidget();
clientCursor = newCursor;
if (canvasHandle != 0) {
OS.FrameworkElement_Cursor (canvasHandle, clientCursor != null ? clientCursor.handle : 0);
}
}
/**
* Specifies the rectangles that should be drawn, expressed relative to the parent
* widget. If the parent is a Display then these are screen coordinates.
*
* @param rectangles the bounds of the rectangles to be drawn
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the set of rectangles is null or contains a null rectangle</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setRectangles (Rectangle [] rectangles) {
checkWidget ();
if (rectangles == null) error (SWT.ERROR_NULL_ARGUMENT);
int length = rectangles.length;
this.rectangles = new Rectangle [length];
for (int i = 0; i < length; i++) {
Rectangle current = rectangles [i];
if (current == null) error (SWT.ERROR_NULL_ARGUMENT);
this.rectangles [i] = new Rectangle (current.x, current.y, current.width, current.height);
}
proportions = computeProportions (rectangles);
}
/**
* Changes the appearance of the line used to draw the rectangles.
*
* @param stippled <code>true</code> if rectangle should appear stippled
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setStippled (boolean stippled) {
checkWidget ();
this.stippled = stippled;
if (handle != 0) {
//TODO CHANGE RECT BRUSH
}
}
}