How to call setUndecorated() after a frame is made visible?

Question

In my Swing application, I want the ability to switch between decorated and undecorated without recreating the entire frame. However, the API doesn\'t let me call setU

Answer 1

Have you tried calling Frame.dispose() and then changing it? Haven't tried it myself, but it might work.

If not, then what you can do is have the frame an inconsequential part of the class, with only the most minimal hooks to the highest level panel or panels necessarily, and just move those to the new frame. All the children will follow.

Answer 2

Well, you are going to need different frame instance. You may be able to move the contents of your frame over without recreating that. The key here is to make your code not be reliant on a specific frame. This is a basic good practice in any case.

Answer 3

calling dispose() releases the native window resources. then you can edit properties like undecorated and so on. then just call setVisible(true) to recreate the window resources and everything works fine (the position and all compoenents won`t be changed)

dispose();
setUndecorated(true/false);
setVisible(true);

Answer 4

Have a look at https://tvbrowser.svn.sourceforge.net/svnroot/tvbrowser/trunk/tvbrowser/src/tvbrowser/ui/mainframe/MainFrame.java

In Method switchFullscreenMode():

dispose();
...
setFullScreenWindow(...);
setUndecorated(true/false);
setBounds(mXPos, mYPos, mWidth, mHeight);
...
setVisible(true);

Actually there's a lot more stuff going on to hide various sidepanels that reappear if the mouse touches the sides.

Also note that you must explicitly set the bounds. Window.setExtendedState(MAXIMIZED_BOTH) interferes badly in timely vicinity of dispose(), because they both rely on multiple native events of the operating system, that are lost, should the window no be displayable at that split second.

I don't recommend taking the default screen directly:

GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();

and instead use the Screen, your JFrame is currently on:

setBounds(getGraphicsConfiguration().getBounds());
getGraphicsConfiguration().getDevice().setFullScreenWindow(this);

Though it's currently the same, it might change in the future.

Answer 5

You can't. That's been my experience when I tried to achieve the same.

However if you have your entire UI in one panel which is in your frame, you can create a new frame and add that panel to the frame. Not so much work.

Something like this:

// to start with
JPanel myUI = createUIPanel();
JFrame frame = new JFrame();
frame.add(myUI);

// .. and later ...

JFrame newFrame = new JFrame();
newFrame.setUndecorated();
newFrame.add(myUI);

In Swing a panel (and indeed any instance of a component) can only be in one frame at a time, so when you add it to a new frame, it immediately ceases to be in the old frame.

Answer 6

Try:

dispose();
setUndecorated(true);
setVisible(true);

Check it Out. Hope it will help !!