topic Re: Hide a graphic? in ArcGIS API for Silverlight Questions

Hide a graphic?

JoshPorter — Tue, 26 Jun 2012 19:15:30 GMT

Is it possible to temporarily remove a graphic from view? similar in the way that GraphicsLayer.Visiblity = false acts

Re: Hide a graphic?

JoshPorter — Tue, 26 Jun 2012 20:26:05 GMT

Setting Geometry to nothing seems to do the trick, then when i set it back to what it was it is back on the map.
Does this sound like a good plan?

Re: Hide a graphic?

JoeHershman — Wed, 27 Jun 2012 04:48:30 GMT

I would just remove the graphic itself (Graphics.Remove) from the Graphics collection, hold onto it and then add it back when needed

Re: Hide a graphic?

JoshPorter — Wed, 27 Jun 2012 16:36:44 GMT

I implemented both in a test project, but it seems easier to extend the Graphic class and add a property much like this one,

  Public Property Visible() As Boolean         Get             Return Me.Geometry IsNot Nothing         End Get         Set(ByVal value As Boolean)             If value Then                 Me.Geometry = mStoredGeometry             Else                 If Me.Geometry IsNot Nothing Then mStoredGeometry = Me.Geometry                 Me.Geometry = Nothing             End If         End Set     End Property

I tried this in a layer using a Flarecluster, and the cluster updated correctly when this property was used. It decremented the count when this property was set to false, and included this Graphic when Visible was set to true. The same is true when maintaining a list of the hidden graphics, but this seems more neat.