DrawNode event and overview window - Diagramming Components

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DrawNode event and overview window (Read 1296 times)

j poz Junior Member Offline I Love MindFusion! Posts: 78 Joined: Nov 21^st, 2012	DrawNode event and overview window Feb 28^th, 2013 at 11:21pm	Print Post
	Is it possible to determine, inside of the DrawNode event, if the node is being drawn for an Overview window or a Diagram? The problem is that we do not want to do all of the rendering we do on the Diagram inside of the Overview, for every visible node, because of speed issues on large diagrams.


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: DrawNode event and overview window Reply #1 - Mar 1^st, 2013 at 8:24am	Print Post
	It seems we should add a RenderOptions argument to DrawEventArgs to let you access overview's detail properties, such as DrawText and DrawImages. For the time being you could check the scale of current graphics transform, but it will also apply when drawing inside a DiagramView that has been zoomed out a lot: Code private void diagram_DrawNode(object sender, DrawNodeEventArgs e) { var measure = new SizeF(1, 1); measure = Utilities.DocToDeviceF(e.Graphics, measure); var scale = measure.Width; if (scale > 0.2) e.Graphics.FillRectangle(Brushes.Red, e.Bounds); } I hope that helps, Stoyan


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