RE: [ve-dev] IContainmentHandler and IConstraintHandler

["Janak Mulani" <janak.mulani@xxxxxxxxx>]

Hi Rich,

Please ignore the previous mail. There is a correction.

In Swing VE, the same class implements IContainmenthandler and
IConstraintHandler.

Can I have separate classes for above?

I tried this: ModelAdapter class implements IContainmentHandler. An iner
class of ULCComponentGraphicalEditPart implements IConstraintHandler and
getAdapter() method returns this object whenever the framework needs an
IConstraintHandler.

But I have a problem:

Suppose I add a button to a frame. The button has text defined from
contributeToDropRequest. Then I drag the button out of the frame on to the
canvas. Two things happen:

1. The button loses the text that was set on it. The property sheet shows
the text but not the graphic on the canvas.
2. As a result its size shrinks.
3. I can no longer resize the button on the canvas (seems like I am losing
some adapters too).

Can you tell me what is wrong? Why should the button lose its text? Can you
please give me a bigger picture of what has changed in this context w.r.t
1.1?

Thanks and regards,

Janak

-----Original Message-----
From: ve-dev-bounces@xxxxxxxxxxx [mailto:ve-dev-bounces@xxxxxxxxxxx]On
Behalf Of Rich Kulp
Sent: Tuesday, November 14, 2006 10:18 PM
To: Discussions people developing code for the Visual Editor project
Subject: Re: [ve-dev] IContainmentHandler and IConstraintHandler



Hi,

On a drop there is no graphical edit part yet, it hasn't been dropped yet to
have a graphical editpart (size on drop happens BEFORE the part is actually
added to the model). Because of that there is no editpart to ask to get the
IConstraintHandler, so it must instead ask the model adapter which is based
upon the type of the child. The jfc.AbstractComponentModelContainmentHandler
already implements IConstraintHandler. If you have your own version of
jfc.AbstractComponentModelContainmentHandler then you should take a look at
the jfc one to see what you need.

Thanks,
Rich


"Janak Mulani" <janak.mulani@xxxxxxxxx>
Sent by: ve-dev-bounces@xxxxxxxxxxx
11/14/2006 11:26 AM Please respond to
Discussions people developing code for the Visual Editor project
<ve-dev@xxxxxxxxxxx>

To"ve-Dev@Eclipse. Org" <ve-dev@xxxxxxxxxxx>
cc
Subject[ve-dev] IContainmentHandler and IConstraintHandler







Hi VE Team,

In VE 1.1:

1. I was defining creation policy in override file to set title on Frame,
text on button etc. on drop on the canvas.

2. For resize on drop, I  had a IConstraintHandler implementation in
ULCComponentGraphicalEditPart to contributSizeCommand() etc. The
getAdapter() method of ULCComponentGraphicalEditpart used to return that
object.

In VE 1.2:

I now define:

1. ULCVEContainmentHandler extends AbstractComponentModelContainmentHandler
which is specified in override as :

  modelAdapterClassname="com.canoo.ulc.visualeditor/com.canoo.ulc.visualedi
tor.propertysheet.ULCVEContainmentHandler"

   This class now sets title on Frame, text on button etc. on drop on the
canvas.

2. Now when I resize on drop, VE expects this class to
contributeSizeCommand(). My old IConstraintHandler in
ULCComponetGraphicalEditPart is not called any more.

Question:

1.Should I now implement all the methods of IConstrainHandler in
ULCVEContainmentHandler?

Basically the same class implements IContainmentHandler and
IConstraintHandler. Is this correct?

2. What should I now return in ULCComponentGraphicalEditPart.getAdapter()
for IConstraintHandler?

Thanks and regards,

Janak

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