topic Re: Change Line Width on MouseOver in ArcGIS API for Silverlight Questions

Change Line Width on MouseOver

oo — Wed, 07 Dec 2011 07:40:53 GMT

I would like to change the line width of a LineSymbol on MouseOver. I followed the SimpleRenderer used in the FeatureLayer Rendering Sample but I don't understand how I can keep the original line color and not over writting it in "<Path x:Name="Element" Stroke="Blue" StrokeThickness="1" />". The FeatureLayer I am working with contains lines of diffrent colors.

Thanks for your help.

By the way: How is the rollover effect of the SimpleFillSymbol in the ClassBreaksRendere of the same sample caused?

Re: Change Line Width on MouseOver

DominiqueBroux — Wed, 07 Dec 2011 09:14:57 GMT

Most generally this kind of effect needs custom symbols.

In the sample you pointed out, we get this effect by changing the line width when the mouse is over:

....
           <VisualState x:Name="MouseOver">
            <Storyboard>
             <DoubleAnimation BeginTime="0" Storyboard.TargetName="Element" Storyboard.TargetProperty="(Shape.StrokeThickness)" To="3" Duration="00:00:01" />
            </Storyboard>
           </VisualState>
...

You will find lot of custom symbols samples in the symbol gallery : http://help.arcgis.com/en/webapi/silverlight/samples/SymbolGalleryWeb/start.htm

Re: Change Line Width on MouseOver

oo — Wed, 07 Dec 2011 13:16:05 GMT

Yes, but how can I keep the line's original color (defined in the .mxd) and just change the width of the line?

Re: Change Line Width on MouseOver

DominiqueBroux — Thu, 08 Dec 2011 06:59:25 GMT

Yes, but how can I keep the line's original color (defined in the .mxd) and just change the width of the line?

OK. I got the problem:), unfortunately I don't see any easy solution 😞
You have to redefine all the original symbols.

Re: Change Line Width on MouseOver

DominiqueBroux — Thu, 15 Dec 2011 10:42:18 GMT

I eventually wrote a sample allowing to keep the symbols defined in the mxd and to extend them automatically with mouse over effects.
Let me know your thoughts about that sample.