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Normal Topic Outline Draging of Nodes (Read 3123 times)
Paul Eden
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Outline Draging of Nodes
Dec 1st, 2008 at 4:47pm
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Hi Stoyan

Is there a property  I can use to change the way nodes drag round the diagram canvas?  We have a rather large number of controls within nodes (a composite control containing many others) and moving this node round the screen is extremly laggy, we expect, due to the repainting of the child controls - other controls move fine. 
An outline drag would be our best case solution to this.


Many thanks


Paul
  
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Stoyo
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Re: Outline Draging of Nodes
Reply #1 - Dec 2nd, 2008 at 6:43am
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Hi Paul,

You could implement some alternative appearance for your control and switch to it from the NodeStartModifying event handler, then switch back to the original appearance from the NodeModified handler. Or you could try setting control.Visibility = Collapsed from the StartModifying event - this should leave only the selection handles visible.

I hope that helps,
Stoyan
  
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Paul Eden
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Re: Outline Draging of Nodes
Reply #2 - Dec 2nd, 2008 at 1:33pm
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Hi Stoyan

I presume the re-setting of the visibility would be handled in the Diagram.NodeModified event as there is no NodeEndModifying event to compliment the StartModfiying (at least in the pre-v2 DLLs are are currently using)


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Stoyo
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Re: Outline Draging of Nodes
Reply #3 - Dec 2nd, 2008 at 3:18pm
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Right, that's why I mentioned NodeModified in the first sentence there Wink

Stoyan
  
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Paul Eden
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Re: Outline Draging of Nodes
Reply #4 - Dec 2nd, 2008 at 11:41pm
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lol!

That'll be me playing my dog-eared "Idiot" card again!

One thing we did notice was that if you click the node without moving, the NodeModified event doesn't not fire (which is fair enough) - is there a secondary event we should monitor to catch this case?


Cheers Stoyan


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Re: Outline Draging of Nodes
Reply #5 - Dec 3rd, 2008 at 7:02am
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Ok, I suppose you would have to handle the NodeClicked event to catch this.

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