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Class KmlRasterLayer.
If you use this constructor, you should set the properties you need manually.
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RequestDrawing(IEnumerable<RectangleShape>,TimeSpan)
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DrawCore(GeoCanvas,Collection<SimpleCandidate>)
This method will draw the image from the GeoImage source based on the parameters provided.
The DrawCore method will be called when the layer is being drawn. It will determine if the image is within the extent and the threshold defined. If these parameters are met, it will query the RasterSource for an image and then apply the other various properties (such as transparency, etc.) on the image. Lastly, it will draw the image on the GeoImage or native image passed into the method.
This method opens the RasterLayer so that it is initialized and ready to use.
The open method plays an important rol,e as it is responsible for initializing the RasterLayer. Most methods on the RasterLayer will throw an exception if the state of the RasterLayer is not opened. When the map draws each layer, it will open the RasterLayer as one of its first steps; then, after it is finished drawing with that layer, it will close it. In this way, we are sure to release all resources used by the RasterLayer.
The close method plays an important role in the life cycle of the RasterLayer. It may be called after drawing to release any memory and other resources that were allocated since the Open method was called. If you override this method, it is recommended that you take the following things into account: This method may be called multiple times, so we suggest you write the method so that that a call to a closed RasterLayer is ignored and does not generate an error. We also suggest that in the Close you free all resources that have been opened. Remember that the object will not be destroyed, but will be re-opened possibly in the near future.
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DrawExceptionCore(GeoCanvas,Exception)
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OnDrawingException(DrawingExceptionLayerEventArgs)
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OnDrawingAttribution(DrawingAttributionLayerEventArgs)
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This property indicates whether a Layer has a BoundingBox or not. If it has no BoundingBox, it will throw an exception when you call the GetBoundingBox() and GetFullExtent() APIs.
The default value is false.
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Event Arguments:RequestingDrawingLayerEventArgs
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