/// <summary>
/// Finds TableViewScrollViewer in visual tree and adds handler to it's "ScrollChanged" event.
/// Also adds handler to "Unloaded" event of cell editor to remove handlers when it will be unloaded.
/// </summary>
private void _SubscribeEvents()
{
Debug.Assert(_cellEditor != null);
Debug.Assert(_popup != null);
TableViewScrollViewer scrollViewer = XceedVisualTreeHelper.FindScrollViewer(_cellEditor);
if (scrollViewer != null)
{
_scrollViewer = scrollViewer;
_scrollViewer.ScrollChanged += new ScrollChangedEventHandler(_ScrollViewerScrollChanged);
}
else
{
// Do nothing, because scroll viewer wasn't found.
}
}
protected override void OnDetachingAndUnloaded()
{
scrollViewer.ScrollChanged -= ScrollChanged;
scrollViewer = null;
base.OnDetachingAndUnloaded();
}
protected override void OnAttachedAndLoaded()
{
scrollViewer = AssociatedObject.FindVisualChildOfType <TableViewScrollViewer>();
scrollViewer.ScrollChanged += ScrollChanged;
base.OnAttachedAndLoaded();
}
