public void setOpaque(boolean isOpaque) {
synchronized (getStateLock()) {
if (this.isOpaque == isOpaque) {
return;
}
}
Window target = (Window) getTarget();
if (!isOpaque) {
SunToolkit sunToolkit = (SunToolkit) target.getToolkit();
if (!sunToolkit.isWindowTranslucencySupported()
|| !sunToolkit.isTranslucencyCapable(target.getGraphicsConfiguration())) {
return;
}
}
boolean isVistaOS = Win32GraphicsEnvironment.isVistaOS();
if (this.isOpaque != isOpaque && !isVistaOS) {
// non-Vista OS: only replace the surface data if the opacity
// status changed (see WComponentPeer.isAccelCapable() for more)
replaceSurfaceDataRecursively(target);
}
synchronized (getStateLock()) {
this.isOpaque = isOpaque;
setOpaqueImpl(isOpaque);
if (isOpaque) {
TranslucentWindowPainter currentPainter = painter;
if (currentPainter != null) {
currentPainter.flush();
painter = null;
}
} else {
painter = TranslucentWindowPainter.createInstance(this);
}
}
if (isVistaOS) {
// On Vista: setting the window non-opaque makes the window look
// rectangular, though still catching the mouse clicks within
// its shape only. To restore the correct visual appearance
// of the window (i.e. w/ the correct shape) we have to reset
// the shape.
Shape shape = target.getShape();
if (shape != null) {
target.setShape(shape);
}
}
if (target.isVisible()) {
updateWindow(true);
}
}
public void setOpacity(float opacity) {
if (!((SunToolkit) ((Window) target).getToolkit()).isWindowOpacitySupported()) {
return;
}
if (opacity < 0.0f || opacity > 1.0f) {
throw new IllegalArgumentException(
"The value of opacity should be in the range [0.0f .. 1.0f].");
}
if (((this.opacity == 1.0f && opacity < 1.0f) || (this.opacity < 1.0f && opacity == 1.0f))
&& !Win32GraphicsEnvironment.isVistaOS()) {
// non-Vista OS: only replace the surface data if opacity status
// changed (see WComponentPeer.isAccelCapable() for more)
replaceSurfaceDataRecursively((Component) getTarget());
}
this.opacity = opacity;
final int maxOpacity = 0xff;
int iOpacity = (int) (opacity * maxOpacity);
if (iOpacity < 0) {
iOpacity = 0;
}
if (iOpacity > maxOpacity) {
iOpacity = maxOpacity;
}
setOpacity(iOpacity);
synchronized (getStateLock()) {
if (!isOpaque && ((Window) target).isVisible()) {
updateWindow(true);
}
}
}