DiagramLink Intersects check using Node bounds as parameter - Diagramming Components

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DiagramLink Intersects check using Node bounds as parameter (Read 2626 times)

beetee YaBB Newbies Offline I Love MindFusion! Posts: 23 Location: Switzerland Joined: Jul 13^th, 2017	DiagramLink Intersects check using Node bounds as parameter Mar 26^th, 2018 at 2:25pm	Print Post
	Hello We allow the user to select a node and move it in the diagram using the Keys(Up/Down/Left/Right). This is implemented in Key Press event handlers. We have to restrict the movement of nodes when it intersects any of the other links in the diagram. We use the DiagramLink.Intersects while moving a node with mouse and it works perfectly. We want to achieve the similar functionality for key press as well. Is there any API available that take the Bounds of the Node and check if it Intersects with a link? We want to restrict the Key press event in this case so that the node will not intersect the link after it is moved. For that we should know that new Bounds of the Node will not be intersecting with any of the nodes after the movement. Regards, BT


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Slavcho YaBB Moderator Offline tech.support Posts: 3448 Joined: Oct 19^th, 2005	Re: DiagramLink Intersects check using Node bounds as parameter Reply #1 - Mar 26^th, 2018 at 6:57pm	Print Post
	Hi, Try this approach - Code var hitTester = (DiagramNode)movedNode.Clone(false); var testRect = movedNode.Bounds; testRect.Offset(-20, 0); hitTester.Bounds = testRect; foreach (var link in diagram.Links) if (link.Intersects(hitTester)) ... Regards, Slavcho


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beetee YaBB Newbies Offline I Love MindFusion! Posts: 23 Location: Switzerland Joined: Jul 13^th, 2017	Re: DiagramLink Intersects check using Node bounds as parameter Reply #2 - Mar 27^th, 2018 at 6:47am	Print Post
	Hello Slavcho, Thank you for the quick reply. I have tried your suggestion. As soon the execution hit the statement Code var hitTester = (DiagramNode)movedNode.Clone(false); Application is in break mode. D:/Delete/2018-03-27_08-37-16.png Regards, BT

	2018-03-27_08-37-16.png (Attachment deleted)
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Slavcho YaBB Moderator Offline tech.support Posts: 3448 Joined: Oct 19^th, 2005	Re: DiagramLink Intersects check using Node bounds as parameter Reply #3 - Mar 27^th, 2018 at 7:29am	Print Post
	If it's a custom node class you might have to create a copy constructor. Or just create an instance of rectangular ShapeNode there instead of cloning if you only care about rectangular boundaries.


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