private void updateShellStructure() {
Region region = new Region(mShell.getDisplay());
int maxX = mShell.getBounds().width;
int maxY = mShell.getBounds().height;
region.add(0, 0, maxX, maxY);
if (!getMaximized()) {
// top left
region.subtract(0, 0, 4, 1);
region.subtract(0, 1, 2, 1);
region.subtract(0, 2, 1, 1);
region.subtract(0, 3, 1, 1);
// bottom right
region.subtract(maxX - 1, maxY - 4, 1, 4);
region.subtract(maxX - 2, maxY - 2, 1, 2);
region.subtract(maxX - 3, maxY - 1, 1, 1);
region.subtract(maxX - 4, maxY - 1, 1, 1);
// bottom left
region.subtract(0, maxY - 4, 1, 4);
region.subtract(1, maxY - 2, 1, 2);
region.subtract(2, maxY - 1, 1, 1);
region.subtract(3, maxY - 1, 1, 1);
// top right
region.subtract(maxX - 4, 0, 4, 1);
region.subtract(maxX - 2, 1, 2, 1);
region.subtract(maxX - 1, 2, 1, 1);
region.subtract(maxX - 1, 3, 1, 1);
}
mShell.setRegion(region);
}
void paint(PaintEvent e) {
GC gc = e.gc;
Point size = comp.getSize();
if (curveColor == null) curveColor = e.display.getSystemColor(SWT.COLOR_BLACK);
int h = size.y;
int[] simpleCurve = new int[] {0, h - 1, 1, h - 1, 2, h - 2, 2, 1, 3, 0};
// draw border
gc.setForeground(curveColor);
gc.setAdvanced(true);
if (gc.getAdvanced()) {
gc.setAntialias(SWT.ON);
}
gc.drawPolyline(simpleCurve);
Rectangle bounds = ((Control) e.widget).getBounds();
bounds.x = bounds.y = 0;
Region r = new Region();
r.add(bounds);
int[] simpleCurveClose = new int[simpleCurve.length + 4];
System.arraycopy(simpleCurve, 0, simpleCurveClose, 0, simpleCurve.length);
int index = simpleCurve.length;
simpleCurveClose[index++] = bounds.width;
simpleCurveClose[index++] = 0;
simpleCurveClose[index++] = bounds.width;
simpleCurveClose[index++] = bounds.height;
r.subtract(simpleCurveClose);
Region clipping = new Region();
gc.getClipping(clipping);
r.intersect(clipping);
gc.setClipping(r);
Image b = toolParent.getBackgroundImage();
if (b != null && !b.isDisposed()) gc.drawImage(b, 0, 0);
r.dispose();
clipping.dispose();
// // gc.fillRectangle(bounds);
// Rectangle mappedBounds = e.display.map(comp, comp.getParent(),
// bounds);
// ((Composite) toolParent).drawBackground(gc, bounds.x, bounds.y,
// bounds.width,
// bounds.height, mappedBounds.x, mappedBounds.y);
}
public static void main(String[] args) {
final Display display = new Display();
// Shell must be created with style SWT.NO_TRIM
final Shell shell = new Shell(display, SWT.NO_TRIM | SWT.ON_TOP);
shell.setBackground(display.getSystemColor(SWT.COLOR_RED));
// define a region that looks like a key hole
Region region = new Region();
region.add(circle(67, 67, 67));
region.subtract(circle(20, 67, 50));
region.subtract(new int[] {67, 50, 55, 105, 79, 105});
// define the shape of the shell using setRegion
shell.setRegion(region);
Rectangle size = region.getBounds();
shell.setSize(size.width, size.height);
// add ability to move shell around
Listener l =
new Listener() {
/** The x/y of the MouseDown, relative to top-left of the shell. */
Point origin;
@Override
public void handleEvent(Event e) {
switch (e.type) {
case SWT.MouseDown:
Point point = shell.toDisplay(e.x, e.y);
Point loc = shell.getLocation();
origin = new Point(point.x - loc.x, point.y - loc.y);
break;
case SWT.MouseUp:
origin = null;
break;
case SWT.MouseMove:
if (origin != null) {
Point p = display.map(shell, null, e.x, e.y);
shell.setLocation(p.x - origin.x, p.y - origin.y);
}
break;
}
}
};
shell.addListener(SWT.MouseDown, l);
shell.addListener(SWT.MouseUp, l);
shell.addListener(SWT.MouseMove, l);
// add ability to close shell
Button b = new Button(shell, SWT.PUSH);
b.setBackground(shell.getBackground());
b.setText("close");
b.pack();
b.setLocation(10, 68);
b.addListener(
SWT.Selection,
new Listener() {
@Override
public void handleEvent(Event e) {
shell.close();
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
region.dispose();
display.dispose();
}