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Restrict zooming on only one ShapeNode (Read 2456 times)

Anshul Senior Member Offline I love YaBB 1G - SP1! Posts: 316 Joined: Apr 3^rd, 2009	Restrict zooming on only one ShapeNode May 12^th, 2010 at 3:43am	Print Post
	Hi, In our diagram, we are having several of ShapeNodes. We are performing zoom-in/zoom-out on MouseWheel. 1. For a particular node, we want to restrict zooming. We want that particular node will always have the same appearance to the user, it size should not increase or decrease with respect to zoom factor. How we can achieve this? 2. For that node only, we want to set a different cursor. When mouse moves on that node, cursor should get change to some other cursor and on leave from that node it should reset automatically. Is there any property for this? Please let us know your suggestion. Regards, Anshul


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Restrict zooming on only one ShapeNode Reply #1 - May 12^th, 2010 at 6:17am	Print Post
	Hi, 1. Should it scroll with the diagram? 2. Set the OverrideCursor property when the mouse is over the node. E.g. handle the node's MouseEnter and MouseLeave events to do that, or in a Diagram.MouseMove handler check whether GetNodeAt returns that node and respectively set or clear the cursor. Stoyan


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Anshul Senior Member Offline I love YaBB 1G - SP1! Posts: 316 Joined: Apr 3^rd, 2009	Re: Restrict zooming on only one ShapeNode Reply #2 - May 12^th, 2010 at 8:03am	Print Post
	1. yes it should scroll with the diagram. 2. Thanks, we have thought about node's mouse cursor property if any. Regards, Anshul


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Restrict zooming on only one ShapeNode Reply #3 - May 12^th, 2010 at 10:22am	Print Post
	Call this from the ZoomFactorChanged handler: Code var transform = node.RenderTransform as MatrixTransform; if (transform != null) { double scale = 100.0 / diagram.ZoomFactor; Matrix m = transform.Matrix; m.M11 = m.M22 = scale; transform.Matrix = m; } It will work only for visualization. If you need to let the user select and resize the node, you must change Bounds instead, since the Bounds value is used for adjustment handles hit-testing. I hope that helps, Stoyan


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Anshul Senior Member Offline I love YaBB 1G - SP1! Posts: 316 Joined: Apr 3^rd, 2009	Re: Restrict zooming on only one ShapeNode Reply #4 - May 14^th, 2010 at 3:42am	Print Post
	Hi Stoyan, 1. I want to fix node's position; it should always have the TopLeft position of the diagram. If we perform zoom-in and zoom-out over the diagram, in this case also its position should not change i.e. it should have inside the diagram but behave like a separate window. How can we do this? 2. We want virtualization support. If user perform scrolling, node should move always to have it TopLeft position of the diagram. Is it possible to apply virtualization for a single node? 3. As per your suggestion we have used ZoomFactorChanged handler to handle its size constant but while we are doing zoom-in and zoom-out, controls inside the DiagramNodeAdapter is flickering. Also position of controls is getting up and down while we are changing zoom factor. How to solve this? Please let us know your suggestions. Regards, Anshul


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Restrict zooming on only one ShapeNode Reply #5 - May 17^th, 2010 at 10:36am	Print Post
	If it also should not scroll, then is there any reason you want to keep this node inside the diagram, such as creating links to it? If not, better display it as a separate control placed over the diagram. Stoyan


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