CanvasElement GetInputElementAt (Cairo.Context context, CanvasElement root, double x, double y)
{
if (root.InputTransparent)
return null;
var children = root.Children;
if (children != null) {
// Manual loop to avoid excessive creation of iterators
for (int i = children.Count - 1; i >= 0; i--) {
var result = GetInputElementAt (context, children[i], x, y);
if (result != null)
return result;
}
}
context.Save ();
root.LayoutOutline (context);
var point = TransformPoint (root, x, y);
if (context.InFill (point.X, point.Y)) {
context.NewPath ();
context.Restore ();
return root;
}
context.NewPath ();
context.Restore ();
return null;
}