[news.eclipse.tools.gef] Re: Need meta key info

["CL [dnoyeb] Gilbert" <Lamont_Gilbert@xxxxxxxxxxxxxxxxx>]

Randy Hudson wrote:
> "CL [dnoyeb] Gilbert" <Lamont_Gilbert@xxxxxxxxxxxxxxxxx> wrote in message 
> news:d1hlhb$hvn$1@xxxxxxxxxxxxxxxxxx
>
> > I need to know what keys are being held down during a TemplateDrop action, 
> > and also during a paste action.  The past action is my own action and 
> > command, but how to I know what keys are held down, and at which point 
> > would you recommend me capturing that info?
> >
> >
> > The TemplateDrop seems to be limited to Drop Copy only, but I want a 
> > DropLink.  Any idea on how I should go about getting that?
>
>
> See handleDragOperationChanged. COPY is set there.  A link would suggest 
> that the created item links back to a single instance of the template. 
> i.e., changing the template would update all dropped instances of that 
> template.

Well a Link would imply dropped instances to be linked.  Thats what I am 
looking to imply, though linking means not necessarily what you 
specified in the context of my application.

Because their is the idea of 'linking' and my app uses 'linking' I want 
to stay consistent with the method the user would normally use when 
dropping something and trying to create a link.

I say the COPY set there.  But the listener seems to be completely aware 
that the only action would be copy.  So I fear the change will be more 
complicated.





> > Looks like we have a whole new duplicated DropTargetListener here instead 
> > of the one used normally by Java.
>
>
> What does that mean?  The drop listener is determined by the windowing 
> toolkit, and java has many such toolkits available.  In the case of GEF, we 
> use a jface utility class which is derived from the SWT interface. 

I see.  I guess I had used the awt system before and was used to it. 
Now I gotta get a feel for this swt one which is slightly different. 
Like when dropActionChanged() is called, how do I get an indication of 
what it was changed to?  in the awt system, there is an event object 
passed into this method and you can tell from that.  But here there is 
no way to know, nor reject the new action if you dont want it, AFAICT!?

perhaps there is a method other than 'handleDragOperationChanged' which 
is called DragOperationChanged, and in that I can tell what th 
eoperation is?


CL