Is there any way to get position of a port

GoJS
1

use example as Dynamic Ports

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image1788×1488 254 KB

I want to get the shortest distance of two ports. but the position of port is NAN.

click the example link href and open chrome console.

myDiagram.model.nodeDataArray[0]
// {key: 1, name: "Unit One", loc: "101 204", leftArray: Array(1), topArray: Array(1), …}
let node = myDiagram.findNodeForKey(1)
let p = node.ports.first()
p.position
//H {x: NaN, y: NaN, s: true}

As you can see, the x and y of position is NAN

2

You could use GraphObject.getDocumentPoint. Note, the reason your call to getLocalPoint produced an error is that you didn’t provide the necessary first argument.

const portPoint = p.getDocumentPoint(go.Spot.Center);
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3

To explain further, part of the problem is that GraphObject.position, GraphObject.desiredSize and other such properties have coordinates in the containing Panel’s coordinate system. Read more about this at GoJS Coordinate Systems-- Northwoods Software.

That’s why you want to convert such coordinates of different Nodes into document coordinates: GoJS Coordinate Systems-- Northwoods Software

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