TUM.CMS.VplControl.Core.ZoomCanvas.HandleMouseDown C# (CSharp) Method

        protected virtual void HandleMouseDown(object sender, MouseButtonEventArgs e)
        {
            start = e.GetPosition(this);
            origin = new Point(TranslateTransform.X, TranslateTransform.Y);


            foreach (UIElement child in Children)
            {
                if (VisualTreeHelper.HitTest(child, e.GetPosition(child)) != null)
                {
                    SelectedUiElements.Add(child);
                    mouseMode = MouseMode.Selection;
                }
            }

            if (mouseMode != MouseMode.Selection && e.ChangedButton == MouseButton.Middle)
            {
                Cursor = Cursors.Hand;
                mouseMode = MouseMode.Panning;
            }
        }