Resize a WPF window, but maintain proportions?

Question

I have a user resizable WPF Window that I want to constrain the resizing so the aspect ratio of the window stays constant.

Ideally I would like to constrain mouse location when the window is being resized by dragging a corner to positions that maintain the proper aspect ration. If an edge is resized with the mouse, the other dimension should change at the same time.

Is there a simple way to do this or a good on-line example that anyone knows of?

If no better solutions come up, I'll post what I've done after I've refined it a bit.

Answer 1

Hi, Did you find any solution? Thanks

Answer 2

Does that do the trick:

protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo) {

    if (sizeInfo.WidthChanged) this.Width = sizeInfo.NewSize.Height * aspect;
    else this.Height = sizeInfo.NewSize.Width / aspect;
}

Found it here.