在 Mac 上制作 JFrame 透明中断滚动

Question

I have a transparent undecorated JFrame that I set using AWTUtilities.setWindowOpaque(this, false) . On the JFrame , I have a scrollpane; it works perfectly on Windows. On the Mac, the whole JFrame is draggable; so when I try to scroll through the scrollpane by clicking and holding the mouse on the scrollbar, the entire frame moves instead of the scrollbar thumb. I also tried to use setBackground(new Color(0,0,0,0)) instead of setWindowOpaque() , but it has the same problem. Any ideas on how to fix this?

Answer 1

As suggested in this similar thread , try:

getRootPane().putClientProperty("apple.awt.draggableWindowBackground", Boolean.FALSE);

If you choose to use this, the scrollbar will be usable and the window won't drag. However, you may be stuck with an immovable window, unless you add a MouseMotionListener and move the window around in the mouseDragged() method using a call like frame.setLocation() .

Instead, you might be able to force the user to click on the scrollbar's arrow buttons, rather than drag the scrollbar itself... But that's not the most user-friendly idea I've ever seen.