topic Re: Transparent polygon while digitizing in ArcGIS API for Silverlight Questions

Transparent polygon while digitizing

ChrisBradberry — Thu, 23 Feb 2012 21:10:11 GMT

Hey,

I have been trying to make the polygon transparent while digitizing using the editor widget. The layer in the gdb for the service is transparent, and I also tried to make the service transparent in the xaml, but whenever you add a polygon, it draws solid. That makes it difficult for the users to see what they are doing. The poly turns transparent after they have finished digitizing. Is there a way to make the poly transparent while the user is digitizing?

Thanks, Chris

Re: Transparent polygon while digitizing

JenniferNery — Sat, 25 Feb 2012 16:39:17 GMT

Can you share the feature symbol? Is it coming from service renderer or client renderer? EditVertices will clone the geometry, attribute and symbol so it should not be different from the original graphic.

Re: Transparent polygon while digitizing

ChrisBradberry — Thu, 01 Mar 2012 15:46:43 GMT

Jennifer,

The symbol is just a simple polygon fill that is rendered from a dynamic feature service. It is actually built from an SDE feature, not gdb. It is about as basic as you can get, a feature service with a simple polygon fill with the transparency set to 30%. If I set the transparency in the service, it does not render transparent on the map. If I set the transparency in the xaml, then it will render transparent, but the clone is not transparent while editing.

Does the rest endpoint support transparency in a feature layer?

Thanks, Chris

Re: Transparent polygon while digitizing

JenniferNery — Fri, 02 Mar 2012 00:28:36 GMT

The features on your map are rendered with transparent fill but the EditorWidget.TemplatePicker.Editor.Add draws with solid fill? That does not seem right because Editor.Add relies on FeatureLayer.Renderer.GetSymbol() and use this to set Draw.FillSymbol.

Re: Transparent polygon while digitizing

ChrisBradberry — Fri, 02 Mar 2012 13:25:55 GMT

The features will only render transparent if I add transparency in the xaml. The transparency designated in the service does not render. But the transparency is listed on the rest endpoint when you view it on the web.

So it seems that the problem is getting the service to correctly render transparent. Do you have any ideas about that?

Chris

Re: Transparent polygon while digitizing

JenniferNery — Fri, 02 Mar 2012 16:17:27 GMT

I just tried it with a feature service that has "Hollow style" for Fill Symbol.

REST end point defines the symbol as this

Symbol:

    Style: esriSFSSolid
    Color: [0, 0, 0, 0]
    Outline:
        Style: esriSLSSolid
        Color: [110, 110, 110, 255]
        Width: 1

Kindly see attached map with EditorWidget (I did not complete the draw yet and the fill was still transparent).

Re: Transparent polygon while digitizing

ChrisBradberry — Fri, 02 Mar 2012 17:38:14 GMT

I can make it work with a hollow fill, but that is not optimum. I tried using a 10% hash fill and changed the color, but that rendered as a solid fill. When I view the layers from the rest endpoint website using the viewer, I can see the hash symbol, but not in my silverlight app.

Not sure if I have something that causes a conflict in my code.

Chris