/**
* 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>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>
*
* @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>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
* </ul>
*
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#UP
* @see SWT#DOWN
*/
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;
}
/**
* Returns the receiver's image data. This is the icon that is associated with the receiver in the
* operating system.
*
* @return the image data for the program, may be null
*/
public ImageData getImageData() {
NSAutoreleasePool pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
try {
NSWorkspace workspace = NSWorkspace.sharedWorkspace();
NSString fullPath;
if (this.fullPath != null) {
fullPath = NSString.stringWith(this.fullPath);
} else {
fullPath = workspace.fullPathForApplication(NSString.stringWith(name));
}
if (fullPath != null) {
NSImage nsImage = workspace.iconForFile(fullPath);
if (nsImage != null) {
NSSize size = new NSSize();
size.width = size.height = 16;
nsImage.setSize(size);
nsImage.retain();
Image image = Image.cocoa_new(Display.getCurrent(), SWT.BITMAP, nsImage);
ImageData imageData = image.getImageData();
image.dispose();
return imageData;
}
}
return null;
} finally {
pool.release();
}
}
/**
* 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>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
* </ul>
*/
public boolean open() {
checkWidget();
Display display = this.display;
cancelled = false;
tracking = true;
window = (NSWindow) new NSWindow().alloc();
NSArray screens = NSScreen.screens();
double /*float*/ minX = Float.MAX_VALUE, maxX = Float.MIN_VALUE;
double /*float*/ minY = Float.MAX_VALUE, maxY = Float.MIN_VALUE;
int count = (int) /*64*/ screens.count();
for (int i = 0; i < count; i++) {
NSScreen screen = new NSScreen(screens.objectAtIndex(i));
NSRect frame = screen.frame();
double /*float*/ x1 = frame.x, x2 = frame.x + frame.width;
double /*float*/ y1 = frame.y, y2 = frame.y + frame.height;
if (x1 < minX) minX = x1;
if (x2 < minX) minX = x2;
if (x1 > maxX) maxX = x1;
if (x2 > maxX) maxX = x2;
if (y1 < minY) minY = y1;
if (y2 < minY) minY = y2;
if (y1 > maxY) maxY = y1;
if (y2 > maxY) maxY = y2;
}
NSRect frame = new NSRect();
frame.x = minX;
frame.y = minY;
frame.width = maxX - minX;
frame.height = maxY - minY;
window =
window.initWithContentRect(
frame, OS.NSBorderlessWindowMask, OS.NSBackingStoreBuffered, false);
window.setOpaque(false);
window.setLevel(OS.NSStatusWindowLevel);
window.setContentView(null);
window.setBackgroundColor(NSColor.clearColor());
NSGraphicsContext context = window.graphicsContext();
NSGraphicsContext.static_saveGraphicsState();
NSGraphicsContext.setCurrentContext(context);
context.setCompositingOperation(OS.NSCompositeClear);
frame.x = frame.y = 0;
NSBezierPath.fillRect(frame);
NSGraphicsContext.static_restoreGraphicsState();
window.orderFrontRegardless();
drawRectangles(window, rectangles, 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;
}
Point cursorPos;
boolean down = false;
NSApplication application = NSApplication.sharedApplication();
NSEvent currentEvent = application.currentEvent();
if (currentEvent != null) {
switch ((int) /*64*/ currentEvent.type()) {
case OS.NSLeftMouseDown:
case OS.NSLeftMouseDragged:
case OS.NSRightMouseDown:
case OS.NSRightMouseDragged:
case OS.NSOtherMouseDown:
case OS.NSOtherMouseDragged:
down = true;
}
}
if (down) {
cursorPos = display.getCursorLocation();
} else {
if ((style & SWT.RESIZE) != 0) {
cursorPos = adjustResizeCursor(true);
} else {
cursorPos = adjustMoveCursor();
}
}
if (cursorPos != null) {
oldX = cursorPos.x;
oldY = cursorPos.y;
}
Control oldTrackingControl = display.trackingControl;
display.trackingControl = null;
/* Tracker behaves like a Dialog with its own OS event loop. */
while (tracking && !cancelled) {
display.addPool();
try {
if (parent != null && parent.isDisposed()) break;
display.runSkin();
display.runDeferredLayouts();
NSEvent event =
application.nextEventMatchingMask(
0, NSDate.distantFuture(), OS.NSDefaultRunLoopMode, true);
if (event == null) continue;
int type = (int) /*64*/ event.type();
switch (type) {
case OS.NSLeftMouseUp:
case OS.NSRightMouseUp:
case OS.NSOtherMouseUp:
case OS.NSMouseMoved:
case OS.NSLeftMouseDragged:
case OS.NSRightMouseDragged:
case OS.NSOtherMouseDragged:
mouse(event);
break;
case OS.NSKeyDown:
case OS.NSKeyUp:
case OS.NSFlagsChanged:
key(event);
break;
}
boolean dispatch = true;
switch (type) {
case OS.NSLeftMouseDown:
case OS.NSLeftMouseUp:
case OS.NSRightMouseDown:
case OS.NSRightMouseUp:
case OS.NSOtherMouseDown:
case OS.NSOtherMouseUp:
case OS.NSMouseMoved:
case OS.NSLeftMouseDragged:
case OS.NSRightMouseDragged:
case OS.NSOtherMouseDragged:
case OS.NSMouseEntered:
case OS.NSMouseExited:
case OS.NSKeyDown:
case OS.NSKeyUp:
case OS.NSFlagsChanged:
dispatch = false;
}
if (dispatch) application.sendEvent(event);
if (clientCursor != null && resizeCursor == null) {
display.lockCursor = false;
clientCursor.handle.set();
display.lockCursor = true;
}
display.runAsyncMessages(false);
} finally {
display.removePool();
}
}
/*
* Cleanup: If this tracker was resizing then the last cursor that it created
* needs to be destroyed.
*/
if (resizeCursor != null) resizeCursor.dispose();
resizeCursor = null;
if (oldTrackingControl != null && !oldTrackingControl.isDisposed()) {
display.trackingControl = oldTrackingControl;
}
display.setCursor(display.findControl(true));
if (!isDisposed()) {
drawRectangles(window, rectangles, true);
}
if (window != null) window.close();
tracking = false;
window = null;
return !cancelled;
}
void key(NSEvent nsEvent) {
int nsType = (int) /*64*/ nsEvent.type();
long /*int*/ modifierFlags = nsEvent.modifierFlags();
int nsKeyCode = nsEvent.keyCode();
int keyCode = Display.translateKey(nsKeyCode);
switch (nsType) {
case OS.NSKeyDown:
case OS.NSKeyUp:
{
Event event = new Event();
event.keyCode = keyCode;
int type = nsType == OS.NSKeyDown ? SWT.KeyDown : SWT.KeyUp;
if (!setKeyState(event, type, nsEvent)) break;
if (!sendKeyEvent(type, event)) return;
break;
}
case OS.NSFlagsChanged:
{
int mask = 0;
switch (keyCode) {
case SWT.ALT:
mask = OS.NSAlternateKeyMask;
break;
case SWT.CONTROL:
mask = OS.NSControlKeyMask;
break;
case SWT.COMMAND:
mask = OS.NSCommandKeyMask;
break;
case SWT.SHIFT:
mask = OS.NSShiftKeyMask;
break;
case SWT.CAPS_LOCK:
Event event = new Event();
event.keyCode = keyCode;
setInputState(event, nsEvent, SWT.KeyDown);
sendKeyEvent(SWT.KeyDown, event);
setInputState(event, nsEvent, SWT.KeyUp);
sendKeyEvent(SWT.KeyUp, event);
break;
}
if (mask != 0) {
int type = (mask & modifierFlags) != 0 ? SWT.KeyDown : SWT.KeyUp;
Event event = new Event();
event.keyCode = keyCode;
setLocationMask(event, nsEvent);
setInputState(event, nsEvent, type);
if (!sendKeyEvent(type, event)) return;
}
break;
}
}
int stepSize = (modifierFlags & OS.NSControlKeyMask) != 0 ? STEPSIZE_SMALL : STEPSIZE_LARGE;
int xChange = 0, yChange = 0;
switch (nsKeyCode) {
case 53: /* Esc */
cancelled = true;
tracking = false;
break;
case 76: /* KP Enter */
case 36: /* Return */
tracking = false;
break;
case 123: /* Left arrow */
xChange = -stepSize;
break;
case 124: /* Right arrow */
xChange = stepSize;
break;
case 126: /* Up arrow */
yChange = -stepSize;
break;
case 125: /* Down arrow */
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();
int newX = oldX + xChange;
int newY = oldY + yChange;
event.x = newX;
event.y = newY;
Point cursorPos;
if ((style & SWT.RESIZE) != 0) {
resizeRectangles(xChange, yChange);
inEvent = true;
sendEvent(SWT.Resize, event);
inEvent = false;
/*
* It is possible (but unlikely) that application
* code could have disposed the widget in the move
* event. If this happens return false to indicate
* that the tracking has failed.
*/
if (isDisposed()) {
cancelled = true;
return;
}
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(window, rectsToErase, true);
drawRectangles(window, rectangles, false);
}
cursorPos = adjustResizeCursor(true);
} else {
moveRectangles(xChange, yChange);
inEvent = true;
sendEvent(SWT.Move, event);
inEvent = false;
/*
* It is possible (but unlikely) that application
* code could have disposed the widget in the move
* event. If this happens return false to indicate
* that the tracking has failed.
*/
if (isDisposed()) {
cancelled = true;
return;
}
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(window, rectsToErase, true);
drawRectangles(window, rectangles, false);
}
cursorPos = adjustMoveCursor();
}
if (cursorPos != null) {
oldX = cursorPos.x;
oldY = cursorPos.y;
}
}
}