/// <summary>
/// When IWindowService is invalidated, it means that this control is either placed into
/// a window's visual tree or taken out. If we are in a new Window's visual tree, we
/// want to set the reference to this object inside the Window. Window uses this
/// reference in its WM_NCHITTEST code
/// </summary>
private void OnWindowServiceChanged(Window oldWindow, Window newWindow)
{
if ((oldWindow != null) && (oldWindow != newWindow))
{
oldWindow.ClearResizeGripControl(this);
}
if (newWindow != null)
{
newWindow.SetResizeGripControl(this);
}
}
