Immobile JInternalFrame

[chinedu efoagui]

hi does anyone know how to make a JInternalFrame
immovable or immobile.
that is disable the drag making it impossible for someone to drag it
thanks

[Gregg Bolinger]

Well, I am pretty sure you could add a JInternalFrameListener and listen for the drag event. Anytime someone drags it, just setLocation(x,y) back where it should go.
However, I think a cleaner approach would be to not use JInternalFrames at all. If you aren't moving the frame around, isn't it just a JPanel? I would use a JPanel in place of a JInternalFrame and just statically place it where you want it.
Either way would work, but I like the JPanel idea better.

[Nathan Pruett]

The best way to do this is provide a new DesktopManager to the JDesktopPane that contains this JInternalFrame. Basically, just override the dragFrame() method to ignore moving a frame based on some criteria. In my example I create a marker interface, but you could keep it simple and base it on a predefined title or something if you don't need that much functionality.

import javax.swing.DefaultDesktopManager;
import javax.swing.JComponent;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
 
public class ImmovableInternal extends JFrame {
    
    public ImmovableInternal() {
        super( "ImmovableInternal" );
        JDesktopPane desktop = new JDesktopPane();
        desktop.setDesktopManager( new ImmovableDesktopManager() );
        setContentPane( desktop );
        InternalImmovableFrame f = new InternalImmovableFrame( "InternalImmovable", true, true );
        desktop.add( f );
        f.setBounds( 100, 100, 300, 300 );
        f.show();
    }
    
    public static void main( String[] args ) {
        JFrame f = new ImmovableInternal();
        f.setBounds( 400, 400, 500, 500 );
        f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
        f.show();
    }
    
    private static interface InternalImmovable {}
    
    private static class InternalImmovableFrame extends JInternalFrame implements InternalImmovable {
        public InternalImmovableFrame( String title, boolean closeable, boolean iconifiable ) {
            super( title, false, closeable, false, iconifiable );
        }
    }
    
    private static class ImmovableDesktopManager extends DefaultDesktopManager {
        
        public void dragFrame( JComponent f, int x, int y ) {
            if ( !( f instanceof InternalImmovable ) ) {
                super.dragFrame( f, x, y );
            } 
        }
    }
}