Port Positioning

GoDiagram (6 and previous)
1

Hi,

i’m quite new to diagramm.net and i use the sample FlowCharter project and try to put ports in the center of each edge and maybe a little bit outside and not inside the node.

Is this possible with an easy solution?

Thanks

2

If you look at GraphNode in Flowcharter, you’ll see an override for LayoutChildren.

and you’ll note that the existing code tweaks the port position for the left and right ports
on 3 of the node shapes.

That’s the spot you would want to modify to do all the ports.

Here’s the code that the GoTextNode uses to position all 4 ports.

  GoObject back = this.Background;

  if (back != null) {
    if (this.TopPort != null)
      this.TopPort.SetSpotLocation(MiddleTop, back, MiddleTop);
    if (this.RightPort != null)
      this.RightPort.SetSpotLocation(MiddleRight, back, MiddleRight);
    if (this.BottomPort != null)
      this.BottomPort.SetSpotLocation(MiddleBottom, back, MiddleBottom);
    if (this.LeftPort != null)
      this.LeftPort.SetSpotLocation(MiddleLeft, back, MiddleLeft);
  }

You should be able to get what you want by changing the spot arguments… e.g.

this.TopPort.SetSpotLocation(MiddleTop, back, MiddleTop);

to

this.TopPort.SetSpotLocation(MiddleBottom, back, MiddleTop);

3

You got it. Thank you very much.

Clap