How can i make only single input and single output for all node. about drawflow HOT 7 OPEN

View to restric connections:

• #35

from drawflow.

@jerosoler I want to restrict when already one connection from node A to node B and when user try to connect node A to node C at that time node should not be connected. and when user try to add node D after node A then connection should be auto connect like node A to node D and node D to node B .

from drawflow.

With the previous example you can detect when a connection is created and delete it.

In that case you can use the function to delete or create the connections you want.

Use the functions: removeSingleConnection and addConnection

from drawflow.

@jerosoler using this solution i can able to do this. but when i start connection from last node(the node is not connected to other node) then this solution is not working:

editor.on('connectionStart', (e) => {
connectionStartObj =editor.getNodeFromId(e?.output_id);
console.log('connn',connectionStartObj)
})

    editor.on('connectionCreated', (info) => {
        console.log('datata',connectionStartObj)
        console.log('info',info)
        
        if(connectionStartObj?.outputs?.output_1?.connections?.length > 0) {
            const nodeInfo = editor.getNodeFromId(info.input_id);
      const connections = nodeInfo.inputs[info.input_class].connections;
      console.log(connections,nodeInfo)

      if (connections.length > 1) {
        const lastConnectionIndex = connections.length - 1;
        const lastConnection = connections[lastConnectionIndex];
        editor.removeSingleConnection(lastConnection.node, info.input_id, lastConnection.input, info.input_class);
        connectionStartObj = null;
      }
        }
    })

from drawflow.

In the same way.

With getNodeFromId the node can know what connections it has to other nodes.

You can get the information of the two nodes.

Here you have to use your logic. It could also detect loops...

from drawflow.

Is there any way to detect node where we try to connect.

Ex: Like i have 3 node. Node A , Node B , Node C and i want to try node C to node B then how can i get node B . using connectionStart event i can detect Node C but if i want to get Node B id then??????...

from drawflow.

connectionCreated return { output_id, input_id, output_class, input_class }

from drawflow.