private void OnOwnerMouseMove(object sender, MouseEventArgs e)
{
if (e.MouseDevice.LeftButton == MouseButtonState.Released)
{
FinishDrag();
return;
}
Point point = e.GetPosition(Owner);
if (!IsSelecting && SelectionBoxAdorner != null &&
(System.Math.Abs(SelectionBoxAdorner.StartPoint.X - point.X) > SystemParameters.MinimumHorizontalDragDistance ||
System.Math.Abs(SelectionBoxAdorner.StartPoint.Y - point.Y) > SystemParameters.MinimumVerticalDragDistance))
{
AdornerLayer parentAdorner = AdornerLayer.GetAdornerLayer(Owner);
if (SelectionBoxAdorner != null)
{
parentAdorner.Remove(SelectionBoxAdorner);
}
parentAdorner.Add(SelectionBoxAdorner);
ElementManager.BeginSelection();
IsSelecting = true;
Owner.CaptureMouse();
}
if (SelectionBoxAdorner != null && IsSelecting)
{
SelectionBoxAdorner.EndPoint = point;
SelectionBoxAdorner.InvalidateVisual();
ElementManager.UpdateSelection(new Rect(SelectionBoxAdorner.StartPoint, SelectionBoxAdorner.EndPoint));
}
e.Handled = true;
}