Is it possible to have a translucent windows in java 7 including a title bar?

Question

Related to this question: Is The Java Tutorials Translucent Window example giving trouble to those playing with jdk7?

with jdk1.6.0_26 I seem to be able to apply tra

Answer 1

Fascinatingly, if you add

JFrame.setDefaultLookAndFeelDecorated(true);

Then it allows you to have a draggable, with title bar JFrame (it just uses the ugly java look and feel).

ref: Pass mouse events to applications behind from a Java UI

Now that is weird.

Also note that you can "fake" the old behavior using per pixel transparency, see http://docs.oracle.com/javase/tutorial/uiswing/misc/trans_shaped_windows.html

so you can have the old behavior in both java 6 and 7, but you'd have to special case the code around it and do it one way for one, one way for the other, possibly...

Answer 2

Java 7 introduced Window.setOpacity() to do what the unofficial class AWTUtilities did in Java 6.

Unfortunately it's documented not to work with decorated windows:

The following conditions must be met in order to set the opacity value less than 1.0f:

• The TRANSLUCENT translucency must be supported by the underlying system
• The window must be undecorated (see Frame.setUndecorated(boolean) and Dialog.setUndecorated(boolean))
• The window must not be in full-screen mode (see GraphicsDevice.setFullScreenWindow(Window))

(Emphasis mine)