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Stop avoiding overlapping Nodes on Canvas (Read 12330 times)

kelum Full Member Offline I Love MindFusion! Posts: 100 Joined: Mar 25^th, 2017	Stop avoiding overlapping Nodes on Canvas Apr 5^th, 2017 at 6:23am	Print Post
	Currently mind-fusion canvas can overlap Nodes(Objects) . how to avoid that ?


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Slavcho YaBB Moderator Offline tech.support Posts: 3447 Joined: Oct 19^th, 2005	Re: Stop avoiding overlapping Nodes on Canvas Reply #1 - Apr 5^th, 2017 at 8:06am	Print Post
	Try this method - http://mindfusion.eu/Forum/YaBB.pl?num=1412197508/3#3


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kelum Full Member Offline I Love MindFusion! Posts: 100 Joined: Mar 25^th, 2017	Re: Stop avoiding overlapping Nodes on Canvas Reply #2 - Apr 5^th, 2017 at 8:17am	Print Post
	but where I need to register that `OnNodeModified` method and how to do it ? Do I need register it on constructor of window like this ? public MainWindow() { InitializeComponent(); flowchart.MouseLeave += OnNodeModified; }


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Slavcho YaBB Moderator Offline tech.support Posts: 3447 Joined: Oct 19^th, 2005	Re: Stop avoiding overlapping Nodes on Canvas Reply #3 - Apr 5^th, 2017 at 8:35am	Print Post
	That's a handler for the NodeModified event.


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Slavcho YaBB Moderator Offline tech.support Posts: 3447 Joined: Oct 19^th, 2005	Re: Stop avoiding overlapping Nodes on Canvas Reply #4 - Apr 5^th, 2017 at 9:32am	Print Post
	It's raised once you drop a modified mode. You could do the same from NodeCreated handler for new nodes. If you need to move nearby nodes during mouse movement before dropping a modified node, also handle NodeModifying.


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kelum Full Member Offline I Love MindFusion! Posts: 100 Joined: Mar 25^th, 2017	Re: Stop avoiding overlapping Nodes on Canvas Reply #5 - Apr 5^th, 2017 at 9:36am	Print Post
	but its not triggering once I drag and overlap node items on the canvas, this is not triggering once I Drop directly Node form Node list How can I trigger this event when select item from node list and drop it like overlapping ?


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kelum Full Member Offline I Love MindFusion! Posts: 100 Joined: Mar 25^th, 2017	Re: Stop avoiding overlapping Nodes on Canvas Reply #6 - Apr 5^th, 2017 at 9:39am	Print Post
	Now Oky I define it like following Code <diag:Diagram x:Name="dia" AllowDrop="True" RotateCursor="Hand" ShowGrid="True" NodeCreated="OnNodeCreated" NodeModified="OnNodeModified"/> private void OnNodeModified(object sender, NodeEventArgs e) { RemoveOverlaps(e.Node, 20); } private void OnNodeCreated(object sender, NodeEventArgs e) { RemoveOverlaps(e.Node, 20); } Thanks lot


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kelum Full Member Offline I Love MindFusion! Posts: 100 Joined: Mar 25^th, 2017	Re: Stop avoiding overlapping Nodes on Canvas Reply #7 - Apr 5^th, 2017 at 9:42am	Print Post
	is there any method, If overlapping dragging Node with existing Node, by giving Waring message and reset dragging object to on its previous location ?


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kelum Full Member Offline I Love MindFusion! Posts: 100 Joined: Mar 25^th, 2017	Re: Stop avoiding overlapping Nodes on Canvas Reply #8 - Apr 5^th, 2017 at 9:53am	Print Post
	I have another question here, By rotating Node , I can overlap Nodes So I tried override Hand event like following Code diag:Diagram x:Name="flowchart" AllowDrop="True" RotateCursor="Hand" ShowGrid="True" NodeCreated="OnNodeCreated" NodeModified="OnNodeModified"/> private void Hand(object sender, NodeEventArgs e) { RemoveOverlaps(e.Node, 2); } but its not working ?


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Slavcho YaBB Moderator Offline tech.support Posts: 3447 Joined: Oct 19^th, 2005	Re: Stop avoiding overlapping Nodes on Canvas Reply #9 - Apr 5^th, 2017 at 5:04pm	Print Post
	Quote: is there any method, If overlapping dragging Node with existing Node, by giving Waring message and reset dragging object to on its previous location ? From NodeModifying handler set e.Cancel = true when FindOverlaps returns any nodes. This will show the stop cursor, and return the node to original location if you drop the node there. Quote: By rotating Node , I can overlap Nodes So I tried override Hand event like following RotateCursor is not an event but a property. You should still get NodeModified event raised when a node is rotated. However you might need to extend FindOverlaps to support rotation - try replacing node.Bounds with node.GetRotatedBounds() there.


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kelum Full Member Offline I Love MindFusion! Posts: 100 Joined: Mar 25^th, 2017	Re: Stop avoiding overlapping Nodes on Canvas Reply #10 - Apr 6^th, 2017 at 3:08am	Print Post
	`OnNodeModified` method calling only `RemoveOverlaps` method. its a void method not return anything, so where should I use this `e.Cancel = true` ? Once I define use like this Code private void OnNodeModified(object sender, NodeEventArgs e) { RemoveOverlaps(e.Node, 2); e.Cancel = true; } Getting following error `'NodeEventArgs' does not contain a definition for 'Cancel' and no extension method 'Cancel' accepting a first argument of type 'NodeEventArgs' could be found`
	« Last Edit: Apr 6^th, 2017 at 6:33am by kelum »

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kelum Full Member Offline I Love MindFusion! Posts: 100 Joined: Mar 25^th, 2017	Re: Stop avoiding overlapping Nodes on Canvas Reply #11 - Apr 6^th, 2017 at 3:51am	Print Post
	to stop overlap once rotate as you mentioned I changed `FindOverlap` method following line Code if (bounds.IntersectsWith(node.Bounds)) to Code if (bounds.IntersectsWith(node.GetRotatedBounds())) but still I can rotate to overlap objects


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Slavcho YaBB Moderator Offline tech.support Posts: 3447 Joined: Oct 19^th, 2005	Re: Stop avoiding overlapping Nodes on Canvas Reply #12 - Apr 6^th, 2017 at 7:45am	Print Post
	Quote: but still I can rotate to overlap objects Have you also changed the "bounds" variable assignment to use rotated-bounds value? Quote: e.Cancel = ... You can use this in NodeModifying validation event handler; it's different from the NodeModified event you are showing above.


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kelum Full Member Offline I Love MindFusion! Posts: 100 Joined: Mar 25^th, 2017	Re: Stop avoiding overlapping Nodes on Canvas Reply #13 - Apr 6^th, 2017 at 8:30am	Print Post
	to reset to last location if dragging node overlapping with existing node, I changed xml file like following Code <diag:Diagram x:Name="diagramFile" AllowDrop="True" RotateCursor="Hand" ShowGrid="True" NodeModifying="OnNodeModifiying" NodeCreated="OnNodeCreated" NodeModified="OnNodeModified"/> private void OnNodeModifiying(object sender, NodeValidationEventArgs e) { e.Cancel = true; } But in `OnNodeModifiying` method how to find nodes that overlapping each other ? can you mention implementation of `OnNodeModifiying` method


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Slavcho YaBB Moderator Offline tech.support Posts: 3447 Joined: Oct 19^th, 2005	Re: Stop avoiding overlapping Nodes on Canvas Reply #14 - Apr 6^th, 2017 at 1:00pm	Print Post
	Code private void OnNodeModifying(object sender, NodeValidationEventArgs e) { e.Cancel = FindOverlaps(e.Node, 5).Count > 0; } FindOverlaps is from thread linked above. Regards, Slavcho


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