private void Image_MouseDown(object sender, MouseButtonEventArgs e)
{
var mousePos = e.GetPosition(OuterGrid);
var l = RenderImage.TranslatePoint(new Point(0, 0), OuterGrid);
if (mousePos.X < l.X)
{
return;
}
// Capture and track the mouse.
DrawSelectionBox = true;
MouseDownPos = e.GetPosition(OuterGrid);
OuterGrid.CaptureMouse();
// Initial placement of the drag selection box.
Canvas.SetLeft(SelectionBox, MouseDownPos.X);
Canvas.SetTop(SelectionBox, MouseDownPos.Y);
SelectionBox.Width = 0;
SelectionBox.Height = 0;
// Make the drag selection box visible.
SelectionBox.Visibility = Visibility.Visible;
}
