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Customize Aspect |
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Customize Aspect |
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If we want to customize the aspect of an element without drawing it ourselves, we must create a new plugin which implements the IVisualObjectFactory interface.
Example
| • | Create a new Silverlight Class Library. |
| • | Add a reference to Ecrion.Silverlight. |
public class Addin : IAddin { public Addin() { }
// return a new instance of a IVisualObjectFactory public IVisualObjectFactory GetVisualObjectFactory() { return new VisualObjectFactory(); }
// return null because we don't have mouse event functionality public IActionHandler GetActionHandler() { return null; } }
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| • | Implement the IVisualObjectFactory interface: create a new class named VisualObjectFactory which implements IVisualObjectFactory. |
public class VisualObjectFactory : IVisualObjectFactory { public VisualObjectFactory() {
}
// return null because we don't want to create a visual element public DependencyObject GetVisualElement(ObjectData objectData) { return null; }
/// <summary> /// this method change radius x and y properties for a rectangle data /// if ObjectData is not a RectangleData we do nothing /// </summary> /// <param name="objectData">an ObjectData</param> /// <returns> /// true because we don't want allow other plugins to make their own customizations /// </returns> public Boolean CustomizeObjectData(ObjectData objectData) { if (objectData.getObjectType == typeof(RectangleData)) { ((RectangleData)objectData).RadiusX = 10; ((RectangleData)objectData).RadiusY = 10; }
return false; } } |
| • | Build the project: put the DLL file in the Ecrion.Silverlight XAP archive and edit AppManifest.xaml to register the plugin. |