private void Popup_Opened(object sender, EventArgs e)
{
System.Windows.Controls.Primitives.Popup popup = sender as System.Windows.Controls.Primitives.Popup;
if (popup == null || popup.Child == null)
{
return;
}
if (_textBlock == null)
{
_textBlock = FindVisualChild <System.Windows.Controls.TextBlock>(popup.Child, TextBlockKey);
}
if (popup.PlacementTarget == null || _textBlock == null)
{
return;
}
Point relativePoint = _textBlock.TranslatePoint(new Point(0, 0), (UIElement)popup.PlacementTarget);
if (relativePoint.X < 0)
{
FlowDirectionFromOrigin = System.Windows.FlowDirection.RightToLeft;
// TODO: find a way to make the binding work
(popup.Child as StackPanel).FlowDirection = System.Windows.FlowDirection.RightToLeft;
}
else
{
FlowDirectionFromOrigin = System.Windows.FlowDirection.LeftToRight;
// TODO: find a way to make the binding work
(popup.Child as StackPanel).FlowDirection = System.Windows.FlowDirection.LeftToRight;
}
}
