private AdornerLayer FindAdornerLayer()
{
//var window = Window.GetWindow(AdornedElement);
//return window.FindChild<AdornerLayer>();
ScrollViewer parent = AdornedElement.FindParent <ScrollViewer>();
if (parent != null)
{
return(AdornerLayer.GetAdornerLayer(parent));
}
return(AdornerLayer.GetAdornerLayer(AdornedElement));
}
private bool ShouldOpenOnTop()
{
FrameworkElement container = AdornedElement.FindParent <VirtualizingStackPanel>();
if (container == null)
{
container = AdornedElement.FindParent <Window>();
}
if (container != null)
{
Point relativeLocation = AdornedElement.TranslatePoint(new Point(0, 0), container);
if (_openPreference == PopupOpenPreference.Top)
{
//double heightAbove = container.ActualHeight - (relativeLocation.Y + (AdornedElement as FrameworkElement).ActualHeight);
double heightAbove = relativeLocation.Y;
if (heightAbove >= _content.DesiredSize.Height)
{
return(true);
}
else
{
return(false);
}
}
else if (_openPreference == PopupOpenPreference.Bottom)
{
double heightBelow = container.ActualHeight - (relativeLocation.Y + (AdornedElement as FrameworkElement).ActualHeight);
if (heightBelow >= _content.DesiredSize.Height)
{
return(false);
}
else
{
return(true);
}
}
}
return(true);
}