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Calculate and set ZoomFactor dynamically based on the size of the graph (Read 1511 times)

LGK YaBB Newbies Offline Posts: 30 Location: Boston, MA Joined: Mar 29^th, 2012	Calculate and set ZoomFactor dynamically based on the size of the graph May 10^th, 2012 at 6:38pm	Print Post
	What would be the correct approach to calculate the ZoomFactor of the diagram based on the size of the graph? The goal is to display a complete view of the entire graph on page load in the case when the graph is too large to fit nicely within the specified diagram div box. Consider the following scenario: I have set the Diagram height and width to 800px and 600px (respectively). I have a large diagram consisting of 50+ nodes and ZoomFactor=100. This setup would require the user to either use the scroll bars of the diagram's DIV, or zoom out in order to explore the graph. Instead, I would like to dynamically recalculate and set the ZoomFactor of the diagram, so that when the page is loaded, the user would be able to see the entire large graph at a glance (although the nodes may end up very tiny for large graphs). Many thanks!


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Calculate and set ZoomFactor dynamically based on the size of the graph Reply #1 - May 11^th, 2012 at 5:50am	Print Post
	It should look like this ~ Code var viewRect = view.ClientToDoc(new Rectangle(800, 600)); var sx = viewRect.Width / diagram.Bounds.Width; var sy = viewRect.Height / diagram.Bounds.Height; var newZoom = Math.Min(sx, sy) * 100; if (newZoom < 100) view.ZoomFactor = newZoom;


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