JInternalFrame TitleBar Modify

Greenhorn

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posted 21 years ago

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Hello
I have a need for a JInternalFrame to have a customized look. It should have a small button which toggles between minimize and maximize. So basically i want to modify the titlebar. Further during minimize, I don't want the Internal frame to become an Icon. Rather only the title bar should remain at the same place.
Need some suggestions!!!

Sudharsan Govindarajan

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posted 21 years ago

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Hi!
If u don't like the Metal L&F of the JInternalFrame, change it to some other L&F (like motif/windows). If u r still not satisfied, implement your own L&F.
Reg. the behavior during minimize, i think we can't help it.

Satheesh Thekku Veethil

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posted 21 years ago

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Thanks for the response!

Nathan Pruett

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posted 21 years ago

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You can override minimization behavior by writing your own DesktopManager class and setting it on the JDesktopPane your JInternalFrames are on...

You may have to actually modify DesktopManager, JInternalFrame, and JDesktop to get the behavior you want...

On a previous project I made a JDesktopPane with a taskbar like windows, and minimizing JInternalFrames actually just called setVisible( false ) on them...

I will see if I can find the code... perhaps it will help you do what you want...

-Nate
Write once, run anywhere, because there's nowhere to hide! - /. A.C.

Satheesh Thekku Veethil

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posted 21 years ago

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Nathan
Thanks for the info. If you gimme a sample code, it would be really helpful.

Nathan Pruett

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posted 21 years ago

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OK... looks like what I did was set a DesktopManager like the following on my JDesktopPane...

I added a property to my JDesktopPane also, I called it "OPEN_FRAMES_PROPERTY" and it returned an array of Objects... (this could be the frames themselves, or just the names of frames, depending on what you need to do...)

Then I created a TaskBar class that was a PropertyChangeListener to the JDesktopPane and got events whenever a frame was added or removed. When I got an event, I would pass the actionCommand( the name of the button and the name of the frame ) to a method like the following...

public void setSelected( String name ) {
    try {
        JInternalFrame current = getSelectedFrame();
        if( current != null ) {
            String currentTitle = current.getTitle();
            if( currentTitle != null ) {
                // If trying to reselect the already
                // active frame, ignore it...
                if( currentTitle.equals( name ) ) {
                    return;
                }
                // otherwise deselect the currently
                // active frame.
                else {
                    current.setSelected( false );
                }
            }
        }
 
        JInternalFrame[] allFrames = getAllFrames();
        for( int i = 0; i < allFrames.length; i++ ) {
            if( allFrames[ i ].getTitle().equals( name ) ) {
                getDesktopManager().deiconifyFrame( allFrames[i]);
                setSelectedFrame( allFrames[ i ] );
                allFrames[ i ].setSelected( true );
                allFrames[ i ].toFront();
            }
        }
    }
    catch( PropertyVetoException x ) {
        ErrorManager.handle( x );
    }
 
    desktop.validate();
}

-Nate
Write once, run anywhere, because there's nowhere to hide! - /. A.C.

With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.