protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseDown(e);
if (DragAdornerThumb.IsDragging)
{
return;
}
if (hitResultsList == null)
{
hitResultsList = new List <DesignerContainer>();
}
hitResultsList.Clear();
// Retrieve the coordinate of the mouse position.
Point pt = e.GetPosition(_designerCanvas);
// Clear the contents of the list used for hit test results.
// Set up a callback to receive the hit test result enumeration.
VisualTreeHelper.HitTest(_designerCanvas,
MyHitTestFilter,
MyHitTestResult,
new PointHitTestParameters(pt));
// Perform actions on the hit test results list.
if (hitResultsList.Count > 0)
{
if ((Keyboard.Modifiers & ModifierKeys.Control) != ModifierKeys.None)
{
foreach (var item in hitResultsList)
{
_designerCanvas.SelectContainer(item);
}
}
else
{
}
}
}
