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Normal Topic Node resizing constraints (Read 2375 times)
IgorS
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Node resizing constraints
Dec 10th, 2008 at 2:57pm
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Hi.

I have nodes, that can be resized by user. And I've set node.Constraints.MinWidth property, so when user drags the AdjustmentHandle, he can't make node width less than some value. But if user continues dragging, he can "swing" the node. But I don't want node's position to be changed. Can I disable this opportunity?
Thanks a lot.

Igor.
  
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Stoyo
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Re: Node resizing constraints
Reply #1 - Dec 10th, 2008 at 5:38pm
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Hi,

Unfortunately you can't disable it entirely, but at least could prevent the user from dropping the node at the mirrored position:

Code
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private Rect originalRect;

private void OnNodeStartModifying(object sender, NodeValidationEventArgs e)
{
originalRect = e.Node.Bounds;
}

private void OnNodeModifying(object sender, NodeValidationEventArgs e)
{
	if (originalRect.Left != e.Node.Bounds.Left &&
		originalRect.Right != e.Node.Bounds.Right)
	{
		// it swinged horizontally
		e.Cancel = true;
	}
}


I hope that helps,
Stoyan
  
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IgorS
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Re: Node resizing constraints
Reply #2 - Dec 12th, 2008 at 10:38am
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Well, it's not not very good in my case. I don't think this mirroring is often needed. Maybe you could add this as option in NodeConstraints in future...  Anyway thanks.
  
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Stoyo
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Re: Node resizing constraints
Reply #3 - Dec 19th, 2008 at 11:07am
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This version adds a DisableMirroring option to NodeConstraints:
https://mindfusion.eu/_temp/wpfdiag_cdm.zip

We haven't tested yet how it works in combination with other constraints. Let me know if you see any issues.

I hope that helps,
Stoyan
  
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