R: [gef-dev] How to redraw a Connection

["Alessandro Negri" <negri@xxxxxxxxxxx>]

I'm just doing like this: in my refreshVisuals method I change the aspect of
the PolylineConnection associated to the EditPart, but this doesn't reflect
in a visual change of the line. I need to force a redraw of the view, but I
don't know how. I tried getFigure().repaint or getFigure().revalidate(), but
nothing changes.
So, the model is updated, the line associated to the Edit Part is updated,
but the line doesn't change its aspect. I think I need to delete/add/refresh
the part but I don't know how!?!?

Regards,
	Alessandro 

-----Messaggio originale-----
Da: gef-dev-bounces@xxxxxxxxxxx [mailto:gef-dev-bounces@xxxxxxxxxxx] Per
conto di Siddharth Shankar
Inviato: giovedì 21 settembre 2006 10.27
A: GEF development
Oggetto: Re: [gef-dev] How to redraw a Connection

Hi, 

I guess you can try out the following if you haven't already given it a
shot.
In the propertyChange method of transition edit part depending upon the
property change call the refreshVisuals method. Override the method
refreshVisuals in transition edit part and make whatever viewer level
changes you wish to make, It should work out. 

On a very high level you can take a leaf out of how bendpoints are reflected
on the UI wherein setting the Routing Constraint in refresh Visuals with the
latest list of bendpoints reflects the newly added/ deleted bendpoints. 

Thanks and Regards,
Siddharth

On 9/21/06, Alessandro Negri <negri@xxxxxxxxxxx> wrote:

	Hi all,
	i'm developing a multipage Editor using GEF.
	I have some blocks connected through standard Connection objects, in
	particular I have a TransitionEditPart that extends
	AbstractConnectionEditPart.
	The TransitionEditPart draws a Polyline connection as follows: 
	
	PolylineConnection c = new PolylineConnection();
	setLineAppearence(c);
	c.setConnectionRouter(new ManhattanConnectionRouter());
	// Creates a tooltip with the transition ID
	tooltip = new Label("  "+host.getID()+"  "); 
	tooltip.setOpaque(true);
	c.setToolTip(tooltip);
	c.setTargetDecoration(new PolylineDecoration());
	return c;
	
	The problem is that I have 5 types of transitions and everyone has
its own
	color and appearence (I set this with the setLineAppearence method).
The 
	TransitionEditPart is associated to a PropertySheet that shows its
type.
	When I change the type in the Property View, I update the model and
then
	fire a property change event, caught by the propertyChange method of
my 
	TransitionEditPart.
	So...the question: how can I force the Connection to be redrawn? I
tried all
	the repaint, revalidate, refresh methods, but the visual aspect of
the edit
	part never changes according to the the modified property. I think
that a 
	solution could be to delete the Connection and then redraw it, but
I'm not
	able to do that...
	
	Any suggestion?
	
	In general which is the best way to do a graphical refresh of an
Edit Part
	after a property change event? My solution in other cases was to 
	delete/add/refresh the part...
	
	Thanks in advance,
	        Alessandro
	
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-- 
Thanks,
Siddharth