ChildWindow Positioning

Silverlight ChildWindow is centered over the parent control. I have extended ChildWindow to open it at a specific position.

Here is a live demo : childwindow-positioning-demo

And here is the code :

public partial class ChildWindowEx : ChildWindow
{

    Point _pt = new Point(0,0);

    public ChildWindowEx()
    {
        InitializeComponent();
    }

    public ChildWindowEx(Point pt) : this()
    {
        _pt = pt;            
    }

    protected override Size ArrangeOverride(Size finalSize)
    {            
        Grid grid = Utils.FindChild(this, "ContentRoot");

        if (grid != null)
        {               
            grid.Arrange(new Rect(_pt.X, _pt.Y, grid.DesiredSize.Width, grid.DesiredSize.Height));
            return finalSize;
        }

        return base.ArrangeOverride(finalSize);
    }
}

Visual Studio 2010 Solution : download