Hi,


I'd like to achieve some auto-aligning similar to the WinForms Designer of VS, as in:

when dragging a node, and...

- its current Y-Coordinate is near the Y-Coordinate of some other node, snap to that Y-Coord. and display a helper line across the diagram through the top of that node.
- its current Y-Center is near the Y-Center of some other node, snap the center to that Y-Coord. and display a helper line across the diagram through the Y-Center of that node.
- same for Bottom
- similarly for X-Coordinates (Left, Center, Right).


This will help aligning Nodes horizontally and vertically. Is this implemented? (I think Diagram.AutoAlignNodes works differently, right?). So what would I need to do to achieve this? In the NodeModifying-Event, I seem not to be able to change the bounds of the dragged node:

        private void HandlesNodeModifying(object sender, NodeValidationEventArgs args)
        {
                const float Delta = 1f;

                var node = args.Node;
                var db = this.Diagram.Bounds;
                var same = this.Diagram.Nodes.Except(new[] { args.Node })
                                                    .FirstOrDefault(n => Math.Abs(n.Bounds.Y - node.Bounds.Y) < Delta);
                if (same!= null)
                {
                    node.Bounds = new RectangleF(node.Bounds.X, same.Bounds.Y, node.Bounds.Width, node.Bounds.Height);
                }

                same= this.Diagram.Nodes.Except(new[] { args.Node })
                                                .FirstOrDefault(n => Math.Abs(n.Bounds.X - node.Bounds.X) < Delta);
                if (same!= null)
                {
                    node.Bounds = new RectangleF(same.Bounds.X, node.Bounds.Y, node.Bounds.Width, node.Bounds.Height);
                }
        }
 

PS: sorry for the amount of questions lately

Thanks, that kind of works, but what if I (for whatever reason) wish to do it manually.

Is there a possibility to update a node's Bounds while the user is dragging it? (Inside the NodeModifying handler it doesn't seem to work).


Cheers,
Tim

The "kind of" means that it aligns the nodes, yes, but I want to do some extra steps when aligning, and I may need some custom alignment rules on top of "align to border within AutoAlignDistance".

So, a read/write "bounds"-Property on the NodeValidationEventArgs would help me a lot - thanks for adding this (if you may)!

Thanks,
Tim

Perfect! Thank you!

(btw, convincing my boss to buy MindFusion diagramming is in progress getting this quality of support while still in evaluation is pretty awesome!)