internal ControlToWatch AddControlToWatch(UIElement elementToWatch, Action <Point, Size> callback)
{
ControlToWatch returnvalue = new ControlToWatch(elementToWatch, callback);
Size elementCurrentSize;
FrameworkElement control = elementToWatch as FrameworkElement;
if (control != null)
{
elementCurrentSize = control.INTERNAL_GetActualWidthAndHeight();
}
else
{
elementCurrentSize = new Size();
}
Point elementCurrentPosition = INTERNAL_PopupsManager.GetUIElementAbsolutePosition(elementToWatch);
returnvalue.PreviousPosition = elementCurrentPosition;
returnvalue.PreviousSize = elementCurrentSize;
_controlsToWatch.Add(returnvalue);
if (!_timer.IsEnabled)
{
_timer.Start();
}
return(returnvalue); //note: we need to return the value to be able to remove it afterwards.
}
internal void RemoveControlToWatch(ControlToWatch controlToStopWatching)
{
_controlsToWatch.Remove(controlToStopWatching);
if (_controlsToWatch.Count == 0)
{
_timer.Stop();
}
}
