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Normal Topic Center diagram nodes (Read 2180 times)
Christian Sack
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Center diagram nodes
Jan 16th, 2014 at 10:40am
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Hello,
I am using the Diagram and DiagramView classes to display a workflow. I am also using the FlowchartLayout class to automatically layout the nodes. But I didn't find a way to center the nodes within the view (and within the visible area respectively). Is there a way to center the nodes with the help of this layout?

Best regards,
Christian Sack
  
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Stoyo
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Re: Center diagram nodes
Reply #1 - Jan 16th, 2014 at 11:38am
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Hi,

At this time the layout classes always start arranging from top-left of diagram.Bounds, unless you use TreeLayout with KeepRootPosition. You can center on a node by setting the scroll position after applying a layout. For scrolling to work, you might also have to ensure the diagram is larger than current view:

Code
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void CenterHorizontally(DiagramNode node)
{
	var viewport = diagramView.ClientToDoc(diagramView.ClientRectangle);
	if (viewport.Width > diagram.Bounds.Width)
	{
		var r = diagram.Bounds;
		r.X -= viewport.Width / 2;
		r.Width = viewport.Width;
		diagram.Bounds = r;
	}

	diagramView.ScrollX = node.GetCenter().X - viewport.Width / 2;
}


I hope that helps,
Stoyan
  
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