Hi Stoyan,

We have some nodes in our diagram.
We want to magnify some of the nodes, for that we are selecting that nodes using mouse drag. When we drag the mouse a ned rect is created and we want to magnify that rect portion only. For this purpose we are using following code.

Point oldCursorPosition = diagram.ClientToDoc(Mouse.GetPosition(diagram.Parent as ScrollViewer));
		    double newScrollX = diagram.ScrollX;
		    double newScrollY = diagram.ScrollY;
		    diagram.ZoomFactor = 200;
		    Rect newBounds = diagram.ClientToDoc(new Rect(0, 0, scrollViewer.ActualWidth, scrollViewer.ActualHeight));
		    Point newCursorPosition = new Point(newBounds.X + newBounds.Width / 2, newBounds.Y + newBounds.Height / 2);
		    double diffx = (oldCursorPosition.X - newCursorPosition.X);
		    double diffy = (oldCursorPosition.Y - newCursorPosition.Y);
		    newScrollX += diffx;
		    newScrollY += diffy;
		    newBounds.X = newScrollX;
		    newBounds.Y = newScrollY;
		    newBounds.Union(diagram.GetContentBounds(false, false));
		    newBounds.Inflate(200, 200);
		    diagram.Bounds = newBounds;
		    diagram.ScrollTo(new Point(newScrollX, newScrollY)); 

It is working very fine. We want after magnification, this rect will come at the center of the diagram so that when we perform zooming, we always get this rect as center, how can we do this?


Regards,
Anshul

Hi,

diagram.ZoomToRect() will zoom the content of the rect to fit the diagram completely.

But the requirment is the zooming should get performed taking that selected rectangle as center to zoom,
ie. when we zoom in/out the zooming should get performed with respect to the specified rectangle only and not from the center of diagram.

Regards,

I am having the same issue.
Whats the solution for it! Can someone please share the sample code here..
Thank you.