Disable Alt+Enter for TreeViewer in Eclipse

I have added a key listener to a tree in SWT and when i press Alt+Enter the state of the key event is keyCode = 65536 and statemask = 0, when it should have been keyCode='\r' and statemask=65536.

Below is the code snippet i have written-

mViewer.getTree().开发者_运维知识库addListener(SWT.KeyDown, new Listener() {
            @Override
            public void handleEvent(Event e) {
                if(e.keyCode == SWT.CR && e.stateMask == SWT.ALT) {
                    e.doit = false;
                }
            }
        });

Eclipse workbench filters some of the events before delegating the events to the listeners in the components. Is there a way i can disable the alt+enter to not execute the show properties in eclipse on one of the treeviewers?

Best Regards, Keshav

You can override a specific global command for a specific Viewer is many different ways:

• Add a listener to filter out the key sequence - though not always possible.
• Add a Display filter to do the same - the filter can be added/removed at the focus in/out on the control of the Viewer.
• Add a new context to the application and override the needed key bindings for the new context - the context is activated/deactivated at the focus in/out on the control of the Viewer

I prefer this last solution as I can override specific key bindings for the Viewer from any plug-in using the normal binding extension point...

Try the following code:

mViewer.getTree().addKeyListener(new KeyAdapter() {
    @Override
    public void keyPressed(KeyEvent e) {
        if(e.keyCode == SWT.CR && e.stateMask == SWT.ALT) {
            // your code
            e.doit = false;
        }
    }
});

And the imports you need:

import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;

You will see all the key/down events - even if the key is a state key. So the first event is for the Alt key down...

The sequence should be:

• KeyDown: stateMask=0 and keyCode=65536
• KeyDown: stateMask=65536 and keyCode='\r'
• KeyUp: stateMask=65536 and keyCode='\r'
• KeyUp: stateMask=0 and keyCode=65536