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  How to have custom EdgeRenderer for springgraph.Roamer « previous next »
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Author Topic: How to have custom EdgeRenderer for springgraph.Roamer (Read 1451 times)
bjg
Newbie FD

Posts: 25



How to have custom EdgeRenderer for springgraph.Roamer
« on: 08 Aug 2008, 05:06:59 UTC »
Hello All,

I am currently using com.adobe.flex.extras.controls.springgraph.Roamer class to display a spring graph. I am using an ItemRenderer (thats actually an mxml file) to render each Item (node) in the Roamer.

Now, I want to have names beside each of the edges and also arrows showing direction of the edges.

I tried with implementing the IEdgeRenderer interface to create an ActionScript class "MyEdgeRenderer", wrote the draw() method in it. Then I asigned the edgeRenderer property of Roamer with this class name.

Code:
<fc:Roamer id="roamer" backgroundColor="#ffffff"
lineColor="#333388" width="100%" x="0" height="100%" y="0"
itemRenderer="com.mypackage.renderers.MyItemView"
edgeRenderer="com.mypackage.renderers.MyEdgeRenderer"
autoFit="true"/>

But it gives a compile time error
Code:
Initializer for 'edgeRenderer': values of type com.adobe.flex.extras.controls.springgraph.IEdgeRenderer cannot be represented in text.

I tried to assign the MyEdgeRenderer to edgeRenderer property dynamically.
Code:
roamer.edgeRenderer = (IEdgeRenderer)(MyEdgeRenderer);

Then it throws a error during execution of the above code
Code:
TypeError: Error #1034: Type Coercion failed: cannot convert com.mypackage.renderers.::MyEdgeRenderer$ to com.adobe.flex.extras.controls.springgraph.IEdgeRenderer.

I am in urgent need of some help. Would greatly appreciate any input(s).

Thanks
bjg




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thanks
BJG

"The most beautiful thing we can experience is the mysterious. It is the source of all true art and all science. He to whom this emotion is a stranger, who can no longer pause to wonder and stand rapt in awe, is as good as dead: his eyes are closed." - Albert Einstein


flexy
flexdeveloper.eu
Guru/Addict FD

Posts: 3,099


Recovering Coffee Addict & Adobe Expert




Re: How to have custom EdgeRenderer for springgraph.Roamer
« Reply #1 on: 09 Aug 2008, 09:58:46 UTC »
Does your EdgeRenderer implement IEdgeRenderer? It needs to be typed to this interface, or it's not going to work.
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bjg
Newbie FD

Posts: 25



Re: How to have custom EdgeRenderer for springgraph.Roamer
« Reply #2 on: 11 Aug 2008, 06:29:26 UTC »
Hi,

I was getting wrong in assigning the the MyEdgeRenderer to edgeRenderer property dynamically.
I do it now like this... and it worked..
Code:
roamer.edgeRenderer = (IEdgeRenderer)(new myEdgeRenderer());

But, I am still unable to have Labels to edges (though I could draw the edges myself).
I am also able to draw the arrows, but they donot point to correct "to" as the fromView and toView parameters of the implemented draw() method of the IEdgeRenderer interface donot refer to the correct "from" and "to". This is perhaps because the Graph object (that acts as dataProvider for the Roamer) does not treat its edges as directional!

Any solution to these problems? I'm getting restless...

Regards
bjg
        
Logged
thanks
BJG

"The most beautiful thing we can experience is the mysterious. It is the source of all true art and all science. He to whom this emotion is a stranger, who can no longer pause to wonder and stand rapt in awe, is as good as dead: his eyes are closed." - Albert Einstein


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