Re: [gef-dev] drop actions

["Eugene Ostroukhov" <eostroukhov@xxxxxxxxxxx>]

Title: drop actions

Hello Daniel,

These questions belong to the org.eclipse.tools.gef newsgroup.

 

1. Figure does nothing to respond to user actions - it is the respective edit part responsibility (mouse/keyboard input is mostly handled by the Tools/Drag trackers - you might want to see the sources). But if you just want to change cursor on mouse over you can simply assign it to the figure using IFigure::setCursor.

2. To allow DnD to the GEF diagram you should:

    1. Add Drop listener derived from org.eclipse.gef.dnd.AbstractTransferDropTargetListener to your viewer.

    2. Issue request you need from the listener (by overriding the createTargetRequest)

    3. Update the request as it is needed (updateTargetRequest method).

    4. Handle the request in the respective edit policy tied to the respective edit part.

 

If you have more questions it would be better to move to the newsgroup - anyway, most (if not all) people subscribed to this mailing list read the newsgroup.

 

Best regards,

Eugene

----- Original Message -----

From: Del Pozo Nieto, Daniel

To: 'gef-dev@xxxxxxxxxxx'

Sent: Tuesday, April 13, 2004 2:34 PM

Subject: [gef-dev] drop actions

Hello,

I am developing a gef application using the org.eclipse.gef.examples.logic_2.1.0 (logic circuits) example as a start point. I have a couple of questions about listeners.

   1º- How does a figure, lets say a ciruit or a led figure, listen to mouse actions? I do not find in the exmaple code how or where the the figure listens when the mouse goes over it. For example where or how does the mouse pointer changes when the mouse goes over a figure?

   2º- Other question is how to add to a figure a drop listener. What I am triying to do to is dragging an item from a tree view coded by my self to any any figure in the diagram . I wnat to drag from that tree view to a figure in the diagram but I do not know how to add the drop listener to the figure.

Does any of you (specially Eric Bordeau) how to solve this questions?

Thanks a lot

Daniel del Pozo
d.delpozo@xxxxxxxxxxxxxx