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javaswingsizescreentoolkit

How to make a swing app aware of screen size change?

while my swing app is running I change the size of the screen (e.g. from 1024x768 to 800x600).

Is there any event I can listen to to be notified about this?

Alternatively I could check the screen size in every couple of second, but the Toolkit.getScreenSize() keeps telling me the old value.
How could I get the real screen size after the change?

Environment: Linux (tested on SuSE ES 11 and Ubuntu 9.04)

I appreciate your help.
Marton

Solution

  • The following worked for me, but I'm on a Mac, so I can't say for sure that it will work on Linux:

    System.out.println(GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()[0].getDisplayMode().getWidth() + "x" + GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()[0].getDisplayMode().getHeight());

//Ignore this block, it was simply to give me a chance to change my resolution
Scanner readUserInput=new Scanner(System.in);
System.out.println("Waiting on input, go change your resolution");
String myName=readUserInput.nextLine();

System.out.println(GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()[0].getDisplayMode().getWidth() + "x" + GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()[0].getDisplayMode().getHeight());

    The output (blah is actually input) was as follows:

    1440x900
Waiting on input, go change your resolution
blah
1280x960

    Obviously if you have multiple screen devices, you will have to exercise greater caution.