Hello,

I've a diagram inside a user control that can resize. When resizing, I set the Bounds of the diagram. My method Apply layout is computing the spaces between layers (layered layout) but could take some time.

So, to have a smooth resize, I've try to implement a zoomed diagram and after some delay, the layout is performed.

But when I'm setting the ZoomFactor, the bounds are changed ?

private void UserControl_SizeChanged(object sender, SizeChangedEventArgs e) {
		double l_OldWidth = myGraphicalExplorerDiagram.Bounds.Width;
		myGraphicalExplorerDiagram.Bounds = new Rect(0, 0, e.NewSize.Width, e.NewSize.Height);
		myGraphicalExplorerDiagram.ZoomFactor *= (e.NewSize.Width / l_OldWidth);
		m_ResizeDispatcherTimer.Stop();
		m_ResizeDispatcherTimer.Start();
	  }

	  void ResizeDispatcherTimerHandler(object sender, EventArgs e) {
		m_ResizeDispatcherTimer.Stop();
		myGraphicalExplorerDiagram.ZoomFactor = 100;
		this.ApplyLayout();
	  } 

Thanks for any hint.
Bye
Didier

Hello,

Visually I see the diagram changing its size, it is probably what you say, the diagram control bounds are changed.

The property Bounds is not setting the diagram control size ?

Any idea on how I can achieve my goal ? (that the diagram is resizing with the user control containing it by redrawing only - relayout will occur later through dispatcher)

By the way, it could be fine to have a zoom factor per axis (x - y).

Thanks
Didier

Hello,

I've a diagram control in a resizable area (grid, with splitter).

I'm using the layered layout to arrange my diagram, computing the layer distance according to the width available.


So, I want the following behavior :
- Once diagram resized, I arrange the elements using layered layout with new computed layout distance
- WHEN resizing, I cannot arrange the elements, it takes too longer. So I've thought using the zoom factor to adapt the diagram to the new size. I want to follow the resize as a better feedback experience to the user.

Thanks
Didier

This version adds the ZoomToFit and ZoomToRect methods:
https://mindfusion.eu/_beta/wpfdiag101pre.zip

The Diagram must be placed inside a ScrollViewer for them to work correctly.

Stoyan