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| Re: dragging element disappears with this line [message #162283 is a reply to message #162250] |
Fri, 23 November 2007 11:16   |
Eclipse User |
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Originally posted by: jan.herriger.gmx.de
I activated shortcut creation in gmfgen and got dnd support for free (as
far as I remember).
Paolo Russian schrieb:
> Hello! Trying to port a drag&drop from the navigator view to an element
> on the stage, unsuccessfully by now.
>
> What happens is that I have this method to modify:
>
> protected void initializeGraphicalViewer() {
> super.initializeGraphicalViewer();
>
> //This line destroy the dragged element
> getGraphicalViewer().addDropTargetListener(new
> textTransferDropTargetListener(getGraphicalViewer(),
> FileTransfer.getInstance()));
>
>
> }
>
> and I add (as happening on some tutorials, and in my old gmf1 source)
> the commented line: as I do that move, no matter what, the element I was
> dragging around get killed and disposed as soon as I enter the stage
> view (the designer view.. if you prefer.. where the nodes are displayed
> anyway).
>
> I tried to adapt some of the code portions found here but none of them
> helped me to obtain a working draggable function, the cursor always
> remains to "denied" state when I try to dnd. Implementing carefully line
> by line the old source I have to port... as I arrive to that
> "addDropTargetListener" the icon of the dragged item is no longer
> denied... it disappears and returns to a normal arrow-pointer as if you
> never dragged anything!
> What is the matter? I've placed debug print outputs in every method of
> the listener class being involved, and none of them gets printed so the
> listener class isn't called. Or gets disposed before construction.
> I don't know what to do, If you have an idea on how I may implement a
> drag&drop under gmf2...
>
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| Re: dragging element disappears with this line [message #162369 is a reply to message #162307] |
Fri, 23 November 2007 14:37 |
| Eclipse User |
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Originally posted by: jan.herriger.gmx.de
In .gmfgen > Gen Diagram xxx you have "contains shortcuts to" and
"shortcuts provided for". There, set appropriate model file extensions.
AFAIK, it doesn't matter what extension to chose, if you just wanted dnd
beeing enabled and get rid of shortcut creation afterwards.
This enables your editor to create views, when model elements are
dropped into it. EditParts install DragDropEditPoliciy. These Policies
handle DropRequests arriving. You can override DragDropEditPoliciy in
order to return a command which sets specific properties instead of
creating views.
Paolo Russian schrieb:
> O__O "shortcut creation", it sound very sweet... but what-how-where is
> this?
> Is it some kind of implementation like the tabbed properties now you can
> create from gmfgen?
>
> Thanks in advance..
>
> Paolo
>
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| Re: dragging element disappears with this line [message #162513 is a reply to message #162392] |
Sat, 24 November 2007 11:53 |
| Eclipse User |
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Originally posted by: jan.herriger.gmx.de
This is a multi-part message in MIME format.
--------------080105060003020705070906
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 7bit
Paolo Russian schrieb:
> I wrote "navigator" as "contains shortcut to" field but nothing at all
> changed. No new classes, no new methods... I do not have a
> dragdropeditpolicy I looked through the whole project!
I really thought, this would do more. Do you have some 'generated not'
in xxxDiagramEditor and/or xxxEditPart#createDefaultEditPolicies? I
attached the DiagramEditor which was generated for me.
> Am I supposed to set a specific value in these shortcuts? Somewhere in
> the net they refer to "linking from a domain to another" when they talk
> of these shortcuts, they never refer to "drag & drop" functions.
> I am trying to make fit some stuff on my DropListener I assign in
> XXDiagramEditor.java.. but I cannot get anything but the drop coordinates.
> I mean, as I drag (without releasing the mouse button) around the mouse
> with my object attached... it spits on the console output (as I inserted
> some system.outs by 4 debug) the x,y position of the mouse.
> When I release the button it does nothing.
The next step is to install a DragDropEditPolicy on the EditPart (the
one, an element is dropped into):
protected void createDefaultEditPolicies() {
....
installEditPolicy(EditPolicyRoles.DRAG_DROP_ROLE,
new DragDropEditPolicy());
....
}
Override DragDropEditPolicy#getDropObjectsCommand(...) to return a
command that fits your needs.
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