Do not accept Strings as keys for nodes and edges

[bubnenkoff]

My data is not int-based. Because some of real data have leading zero. The graphview crush on next data:

    var json = {
      "nodes": [
        {"id": "01", "label": 'circle'},
        {"id": "02", "label": 'ellipse'},
        {"id": "03", "label": 'database'},
        {"id": "04", "label": 'box'},
        {"id": "05", "label": 'diamond'},
        {"id": "06", "label": 'dot'},
        {"id": "07", "label": 'square'},
        {"id": "08", "label": 'triangle'},
      ],
      "edges": [
        {"from": "01", "to": "02"},
        {"from": "02", "to": "03"},
        {"from": "02", "to": "04"},
        {"from": "02", "to": "05"},
        {"from": "05", "to": "06"},
        {"from": "05", "to": "07"},
        {"from": "06", "to": "08"}
      ]
    };

error:

    The following TypeErrorImpl was thrown building GraphView$(dirty, state: _GraphViewState#a4f6c):
Expected a value of type 'int', but got one of type 'String'

I tried change to:

var a = node.key!.value.toString();

But got error:

Node{position: Offset(0.0, 0.0), key: [<1>], _size: Size(77.0, 48.0)} is not connected to primary ancestor
Node{position: Offset(0.0, 0.0), key: [<2>], _size: Size(77.0, 48.0)} is not connected to primary ancestor

[nabil6391]

Hm, I might have to give ability to create keys using strings.

[nabil6391]

This is now released in 1.0.0
. Have a look

[RottenSchnitzel]

Is there anything required to do that? I get a type 'String' is not a subtype of type 'int?' in type cast error.

The function looks like this:

@override
void initState() {
  final node0 = Node.Id("0");
  final node1 = Node.Id("1");
  graph.addEdge(node0, node1);
  builder
    ..siblingSeparation = (10)
    ..levelSeparation = (50)
    ..subtreeSeparation = (100)
    ..orientation = (BuchheimWalkerConfiguration.ORIENTATION_LEFT_RIGHT);
}