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Rap ComboBox selection handling [message #1415194]

Tue, 02 September 2014 09:35

Florian Makowski

Messages: 5
Registered: July 2014

Junior Member

Hey guys,

i am currently using a "org.eclipse.swt.widgets.Combo" in my application and now i am trying to implement an keyboard support for my widgets. now my problem is that i want to trigger an event if an element in the combobox is selected.

in the past i used a selectionlistener to trigger it, when it have been clicked with the mouse. Now when i enter by tab and try to go through the elements by the arrow keys, the listener things that i want to select the object by pressing the arrow key.

are there any solutions to force the listener to wait until i pressed like enter or tab?

Greetz

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Re: Rap ComboBox selection handling [message #1415209 is a reply to message #1415194]

Tue, 02 September 2014 10:17

Ivan Furnadjiev

Messages: 2426
Registered: July 2009
Location: Sofia, Bulgaria

Senior Member

Hi,
you could use event.button field to distinguish selection event by
keyboard from mouse. See this snippet:
-----------------
Combo combo = new Combo( parent, SWT.NONE );
combo.setItems( new String[] { "a", "b", "c" } );
combo.addListener( SWT.Selection, new Listener() {
@Override
public void handleEvent( Event event ) {
if( event.button == SWT.NONE ) {
System.out.println( "selection by keyboard" );
} else {
System.out.println( "selection by mouse" );
}
}
} );
combo.addListener( SWT.DefaultSelection, new Listener() {
@Override
public void handleEvent( Event event ) {
System.out.println( "selection by enter" );
}
} );
------------

HTH,
Ivan

--
Ivan Furnadjiev

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