Hey, Lyubo.

        private void diagram_NodeDoubleClicked(object sender, NodeEventArgs e)
        {
            var node = e.Node;
            if (node.MasterGroup != null)
                node = node.MasterGroup.MainItem as DiagramNode;

            var posX = e.MousePosition.X - node.GetCenter().X;
            var posY = e.MousePosition.Y - node.GetCenter().Y;

            var newPos = new Point(
                diagram.Viewport.X + diagram.Viewport.Width / 2 - node.Bounds.Width / 2 - posX,
                diagram.Viewport.Y + diagram.Viewport.Height / 2 - node.Bounds.Height / 2 - posY);

            node.SetBounds(new Rect(newPos, node.Bounds.Size), true, true);
        }

This method currently implements that when you double-click on any point in node.MasterGroup.MainItem, the point moves to the center of the view, but the ruler does not follow. I want the ruler to follow. What changes should be made in this method?

I fully understand, thank you very much for your guidance, Lyubo