Question

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().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

Answer 1

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…