| Newbie Question: Model not being painted [message #129905] |
Thu, 29 April 2004 22:05  |
Eclipse User |
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Originally posted by: etrexuser.hotmail.com
Hi,
I am a newbie to GEF and I've been trying to display an element on the
screen for quite some time now.
My EditPartFactory creates an instance of a ChildEditPart.
The ChildEditPart defines a XYLayoutEditPolicy for the Layout_Role
The Policy Creates a ChildFigure
==>(Problem 1. The ChildFigure is painted immediately)
The Policy does a getCreateCommand.
The Palette points to the Child class on selection of the Child tool.
When I select the Child Tool and click on the workspace I am able to create
an instance of the model via the execute method of the command.
==>(Problem 2. getContraintsFor(request) returns a NullPointerException)
request.getLocation() works and I am able to store the location of the Child
as part of the child.
The command sends a fireStructureChange() method.
I am able to get the event in the ChildEditPart.
==>(Problem 3. Refresh, RefreshChildren and RefreshVisuals don't seem to do
anything. Nothing appears on the screen).
==>(Problem 4. If I override paintFigure in my Figure class I can see the
control going there, but I don't get the location correctly. It is always 0,
0).
Can you please help. I am desperate.
Thanks.
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| Re: Newbie Question: Model not being painted [message #131837 is a reply to message #130592] |
Tue, 11 May 2004 17:53  |
| Eclipse User |
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Originally posted by: etrexuser.hotmail.com
Hi Pratik,
Thanks for your comments. I have managed to solve the issue by now.
My basics of GEF were not clear. I was not overriding the getModelChildren()
to return the child models and so the editparts/figures were not being
created.
Regards.
"Pratik Shah" <ppshah@us.ibm.com> wrote in message
news:c78s39$1ju$1@eclipse.org...
>
> "Etrex User" <etrexuser@hotmail.com> wrote in message
> news:c6rtko$80j$1@eclipse.org...
> > Hi,
> >
> > I am a newbie to GEF and I've been trying to display an element on the
> > screen for quite some time now.
> >
> > My EditPartFactory creates an instance of a ChildEditPart.
> > The ChildEditPart defines a XYLayoutEditPolicy for the Layout_Role
> > The Policy Creates a ChildFigure
> > ==>(Problem 1. The ChildFigure is painted immediately)
>
> Is the ChildEditPart a container? The figure representing ChildEditPart
is
> created in ChildEditPart's createFigure() method, right? Did you mean
that
> the XYLayoutEditPolicy provides commands to add/create/orphan/delete
> children of this ChildEditPart? What do you mean the child figure is
shown
> immediately?
>
> >
> > The Policy does a getCreateCommand.
> > The Palette points to the Child class on selection of the Child tool.
> > When I select the Child Tool and click on the workspace I am able to
> create
> > an instance of the model via the execute method of the command.
> > ==>(Problem 2. getContraintsFor(request) returns a NullPointerException)
>
> Stack trace? With problems like this you should look at how the logic
> example is doing things. It's doing exactly what you want to do here.
So,
> you just need to find out what you're doing differently.
>
> >
> > request.getLocation() works and I am able to store the location of the
> Child
> > as part of the child.
> > The command sends a fireStructureChange() method.
> > I am able to get the event in the ChildEditPart.
> > ==>(Problem 3. Refresh, RefreshChildren and RefreshVisuals don't seem to
> do
> > anything. Nothing appears on the screen).
> > ==>(Problem 4. If I override paintFigure in my Figure class I can see
the
> > control going there, but I don't get the location correctly. It is
always
> 0,
> > 0).
>
> Are you updating the figure's location in refreshVisuals()?
>
> >
> > Can you please help. I am desperate.
> >
> > Thanks.
> >
> >
> >
> >
> >
> >
>
>
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