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integragreg
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DiagramLite Zoom On Mouse Wheel
Sep 10th, 2009 at 4:11pm
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We have a diagram whose parent is a ScrollViewer. We're changing the ZoomFactor whenever the user clicks on the diagram and scrolls the mouse wheel.

If the zoom factor is increased beyond 100%, the contents of the diagram continue to scale up, but the diagram itself does not. Hence, the diagram contents "bleed" off the diagram at the higher zoom factors.

We've tried scaling the bounds of the diagram, but that doesn't seem to fix anything.

Any help is appreciated.
  
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Stoyo
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Re: DiagramLite Zoom On Mouse Wheel
Reply #1 - Sep 11th, 2009 at 6:15am
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I think this was a bug in an older version. It should work fine with the latest release.

Stoyan
  
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integragreg
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Re: DiagramLite Zoom On Mouse Wheel
Reply #2 - Sep 11th, 2009 at 12:22pm
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We're using version 1.1.0.21879. Is that the latest?
  
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Stoyo
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Re: DiagramLite Zoom On Mouse Wheel
Reply #3 - Sep 11th, 2009 at 12:59pm
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It looks like new enough. Could you copy here the code for the MouseWheel and ButtonDown events?
  
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integragreg
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Re: DiagramLite Zoom On Mouse Wheel
Reply #4 - Sep 11th, 2009 at 4:52pm
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Stoyan,

The bug appears to be fixed in the beta assembly that you released to me this morning. But here is our code just in case:

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base.OnMouseWheel(e);



double expectedZoom = this.ZoomFactor + (this.ZoomFactor) / (e.Delta / 12.0);



if (expectedZoom <= maxZoom)



{








this.ZoomFactor += (this.ZoomFactor) / (e.Delta / 12.0);







}
  
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wojto
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Re: DiagramLite Zoom On Mouse Wheel
Reply #5 - Feb 1st, 2010 at 3:14pm
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Hello, I'm using mouse wheel scrolling for zooming the diagram in my application. It works under IE and Firefox, but the moment I turn windowless mode to "true" : <param name="windowless" value="True" /> the mouse scrolling is not working in Firefox anymore. Do you have any experience with that issue? I need the windowless mode for displaying some html content over silverlight.
  
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Stoyo
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Re: DiagramLite Zoom On Mouse Wheel
Reply #6 - Feb 1st, 2010 at 3:36pm
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Hi,

It seems this is officially not supported by Microsoft (see the note at http://msdn.microsoft.com/en-us/library/dd759034(VS.95).aspx). You might try catching the event from JavaScript and forwarding it to your Silverlight app by calling a [ScriptableMember] method.

I hope that helps,
Stoyan
  
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