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Normal Topic Diagram does not resize properly in an ElementHost control (Read 1999 times)
bogdip
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Diagram does not resize properly in an ElementHost control
Oct 16th, 2014 at 4:42pm
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Hello,

I need to used the Wpf diagram inside a WinForms application. So I've added the Diagram inside an ElementHost control with Dock set to Fill. The problem is that when the main form is maximized, the Diagram is not taking all the space in its host container.

The issue occurs if Diagram.MeasureUnit is the default one (WpfPoint). If I set it to millimeter or inch, it's alright. But I need to use the WpfPoints.

I attach you a simple sample to reproduce it.
What can I do to overcome this?

Thanks,
Bogdan
  
WPFDiagramInsideWinForm.rar (Attachment deleted)
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Stoyo
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Re: Diagram does not resize properly in an ElementHost control
Reply #1 - Oct 17th, 2014 at 9:20am
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Hi,

The diagram's size depends on its Bounds property. You could handle the SizeChanged event of your user control to grow Bounds if necessary:

Code
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public DiagramControl()
{
    InitializeComponent();

    Diagram.DocumentPlane.AllowDrop = true;

    SizeChanged += DiagramControl_SizeChanged;
}

private void DiagramControl_SizeChanged(object sender, SizeChangedEventArgs e)
{
	var diagBounds = diagram.Bounds;
	if (diagBounds.Width < e.NewSize.Width)
		diagBounds.Width = e.NewSize.Width;
	if (diagBounds.Height < e.NewSize.Height)
		diagBounds.Height = e.NewSize.Height;
	diagram.Bounds = diagBounds;
}


I hope that helps,
Stoyan
  
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bogdip
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Re: Diagram does not resize properly in an ElementHost control
Reply #2 - Oct 17th, 2014 at 9:43am
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I was trying the same method, but setting the diagram's Width and Height properties instead of Bounds and it didn't work.

Thanks, now it works.
  
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