I want to add functionality of zooming flowchart on the mouse wheel. If mouse wheel event occurs I want to change zooming. For that I want to get current zoom rectangle (view rectangle) of flowchart. So that I can modify this rectangle and zoom to new rectangle. Is there any property or method for getting it? Or is there any other way of doing this?


further, if possible,  I want to add functionality like zooming with mouse wheel by considering mouse pointer position. this zoom should happen around mouse pointer position.

I have tried this clientRectangle property. It always returns rectangle at zoomfactor 100. Means we does not get a rectangle at different zoom factors.

I think that I have to do manual calculation for getting  current zoom rectangle. This can be done using client rectangle and zoom factor. Please tell me if u find any code/way to do this.

ClientRectangle returns the size of any control in Pixels. Pass that rectangle to ClientToDoc and you will get the document coordinates of the currently visible area, with scroll position and zoom factor included:

fc.ClientToDoc(fc.ClientRectangle);