Bounds rectangle of selected controls in wpf

Question

Is there a simple way to find the rectangle (area and location) that would be required to cover a set of control?? VisualTreeHelper.GetDescandentBounds() works fine, but there are no overloaded methods where I can specify the controls that it should consider for finding the bounds rectangle. Any simple solution will be greatly appreciated.

Thanks

Answer 1

Rect has a Union(Rect) method, which enlarges the current rect to also include the second rectangle. With linq (dont forget to add using System.Linq; to your code file) it's also fairly simple to get a list of rectangles for a list of visuals:

private Rect GetBoundingRect(Visual relativeTo, List<Visual> visuals)
{
    Vector relativeOffset  = new Point() - relativeTo.PointToScreen(new Point());

    List<Rect> rects = visuals
        .Select(v => new Rect(v.PointToScreen(new Point()) + relativeOffset, VisualTreeHelper.GetDescendantBounds(v).Size))
        .ToList();

    Rect result = rects[0];
    for (int i = 1; i < rects.Count; i++)
        result.Union(rects[i]);
    return result;
}       

Edited code: It will now take the position of the individual visuals into account relative to the given visual.