Backslash generates "WARNING: unsupported key:0"

Troubleshooting General Help
1

As the title says. I have a JMEDesktop with a JInternalFrame, and a couple of my controls on the internal frame are attached to a keylistener. When I press the backslash key, the following is logged:

Mar 16, 2009 7:37:07 PM com.jmex.awt.input.AWTKeyInput toAWTCode
WARNING: unsupported key:0


I am on Ubuntu 8.10; don't know if this has anything to do with it (if so, WHY??).

Is a solution on the way? Am I doing something wrong?

Thanks!
2

Please post a test…



Example:


import com.jme.app.SimpleGame;
import com.jme.input.KeyBindingManager;
import com.jme.input.KeyInput;



public class BackSlashTest extends SimpleGame {

    public static void main( String[] args ) {
        new BackSlashTest();
    }

    public BackSlashTest() {
        this.setConfigShowMode( ConfigShowMode.AlwaysShow );
        this.start();
    }

    @Override
    protected void simpleInitGame() {

        KeyBindingManager.getKeyBindingManager().set( "TEST_KEY", KeyInput.KEY_BACKSLASH );

    }

    @Override
    protected void simpleUpdate() {
        if( KeyBindingManager.getKeyBindingManager().isValidCommand( "TEST_KEY", false ) ){
            System.out.println( "TestKey" );
        }
    }
}

3

Pressing the backslash key did not do anything, no TestKey or other messages at all.



EDIT:

Ah, upon a second reading I see you want me to make a test case. Yes, I'll write one that exhibits the problem I'm talking about.

4

Okay, I went and wrote a nice test case that duplicated what I'm doing.



Then I pared it down. And even removing almost everything, I narrowed it down to the minimal lines necessary to generate the warning when I press the backslash key. The warning message shows up with just this code:


import com.jme.app.SimpleGame;
import com.jmex.awt.swingui.JMEDesktop;

public class BackSlashTest extends SimpleGame {

    public static void main( String[] args ) {
        new BackSlashTest();
    }

    public BackSlashTest() {
        this.setConfigShowMode( ConfigShowMode.AlwaysShow );
        this.start();
    }
   
    @Override
    protected void simpleInitGame() {
       JMEDesktop jmedesktop = new JMEDesktop("jmedesktop1");
       jmedesktop.setup(display.getWidth(), display.getHeight(), false, input);
    }

    @Override
    protected void simpleUpdate() {

    }
}



When I run the program and press backslash, the identical message that I posted in the beginning is logged.
5

I debugged a bit into lwjgl and noticed the following:

I have a swissgerman keyboard, when i press '<'  i also get your error message.



The method WindowsKeycodes.mapVirtualKeyToLWJGLCode(int virt_key) maps the windows code to a lwjgl code.



virt_key is 226, which would be the correct key:

org.lwjgl.opengl.WindowsKeycodes

public final static int VK_OEM_102        = 0xE2;  //  "<>" or "|" on RT 102-key kbd.



But org.lwjgl.input.Keyboard has no define for 0xE2, that why KeyCode 0 is returned.
6

Ah, so it's lwjgl's fault then… Hmm. Does jMonkey Engine use the latest lwjgl? (I'm using the one provided in svn); if not, does a newer one include a fix for that?



Anyway luckily I do not need the backslash key, it was just a random thing I happened to find when I accidentally hit backslash instead of backspace while testing my JInternalFrame.

7

To my knowledge, jME is using the latest stable release of LWJGL. Feel free to mention this issue over there, perhaps they can get it resolved.