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Normal Topic zooming and scroll bar issue (Read 1934 times)
deanhully
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zooming and scroll bar issue
Feb 27th, 2009 at 3:11pm
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Hi Stoyo,

I am using the following code to do a zoom that is anchored to the center of the screen. It works pretty well but one problem I have is when you zoom in far enough for nodes to go off the left edge of the screen the horizontal scrollbar doesn't appear.  If I do a select all and move every node a little then the scrollbar updates correctly.

Any thoughts?

TIA

Code
Select All
		Dim VisibleRect As RectangleF = mDiagramView.ClientToDoc(mDiagramView.ClientRectangle)

	    VisibleRect = New RectangleF(0, 0, VisibleRect.Width * 0.9, VisibleRect.Height * 0.9)


		mDiagramView.ZoomToRect(VisibleRect)
		mDiagramView.Diagram.Bounds = New RectangleF(VisibleRect.Width * 0.1 / 2 + mDiagramView.Diagram.Bounds.X, mDiagramView.Diagram.Bounds.Y + VisibleRect.Height * 0.1 / 2, mDiagramView.Diagram.Bounds.Width, mDiagramView.Diagram.Bounds.Height) ' VisibleRect.Width, VisibleRect.Height)
  
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Stoyo
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Re: zooming and scroll bar issue
Reply #1 - Feb 27th, 2009 at 3:20pm
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Hi,

The scroll range depends on the Bounds size and not on where the nodes are, Bounds should be larger than the visible rect for scrollbars to appear. Additionally, try using the ScrollTo method to center the view, instead of setting Bounds.

I hope that helps,
Stoyan
  
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