| [Zest] attach Listener to GraphNode [message #243427] |
Fri, 06 June 2008 14:15  |
Eclipse User |
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Hy.
I recognized, that it is not possible to get events from a GraphNode.
The below EventListener is never executed, when I move my mouse pointer
over the node (for Graph it works as assumed):
graphNode.addListener(SWT.MouseEnter, new Listener() {
@Override
public void handleEvent(Event event) {
System.out.println("foo");
}
});
Is this a known problem in Zest? This would be really handy to build a
simple editor.
The indirect way over a Graph listener is not very practical and also has
some pitfalls (especially when there is more than one node selected).
And another thing ... is there a way to allow only one selection in a
graph?
I thought about something like "new Graph(graphComposite, SWT.SINGLE);",
but this doesn't work (Crashs with Exception).
Other than that, I really love Zest. Not necessary anymore to learn the
GEF framework for my very simple editor problem.
Best regards,
Kai
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| Re: [Zest] attach Listener to GraphNode [message #243650 is a reply to message #243530] |
Sat, 14 June 2008 12:58  |
| Eclipse User |
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Originally posted by: irbull.cs.uvic.ca
Exactly,
Zest is built on Draw2D, and Draw2D catches all these events. The goal
of Zest is to mimic the SWT API, so in a lot of cases we have to create
new events and put them back on the queue.
cheers,
ian
kentusha wrote:
> I think I understand the problem we are having a bit more and have
> perhaps have an idea.
>
> The Graph has inside of it an SWTEventDispatcher, which is effectively
> catching all events on all figures.
>
> The method getLightweightSystem() is public is one could set a new event
> dispatcher and handle all the events.
>
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