How to interactively create links in JointJS

Question

I want to interactively add links to my chart based on JointJS.

My idea is to create a small temporary node on pointerdownwith a link from the source node to this temporary node, drag it on top of another node and pointerupcreate a real link that removes the temporary link and node.

Unfortunately, I don’t know how to convince the pointer to move the temporary element, and not the node on which the event occurred pointerdown. Any ideas? Thank!

var tmp_obj;
paper.on('cell:pointerdown', function(cellView, evt, x, y) {
    if(evt.button == 1) {
        // Freeze the selected node so it does not move
        paper.findViewByModel(cellView.model).options.interactive = false;

        // Create a small temporary node on top of the selected node
        tmp_obj = new joint.shapes.basic.Rect({
            position: { x: x, y: y },
            size: { width: 5, height: 5 }
        }

        // Create the link between the original node and the small temporary node

        // And now?
    }
}

paper.on('cell:pointerup', function(cellView, evt, x, y) {

    if(evt.button == 1) {
        // Unfreeze the origin node
        paper.findViewByModel(cellView.model).options.interactive = true;

        // Delete the temporary object (and temporary link)
        tmp_obj.remove()

        // Find the first element below that is not a link nor the dragged element itself.
        var elementBelow = graph.get('cells').find(function(cell) {
            if (cell instanceof joint.dia.Link) return false; // Not interested in links.
            if (cell.id === cellView.model.id) return false; // The same element as the dropped one.
            if (cell.getBBox().containsPoint(g.point(x, y))) {
                return true;
            }
            return false;
        });

        // create the link from cellView to elementBelow 
    }
});

Answer 1

, JointJS? magnet: true SVG JointJS, , . :

var r = new joint.shapes.basic.Rect({
    position: { x: 50, y: 50 },
    size: { width: 100, height: 40 },
    attrs: { text: { text: 'basic.Rect', magnet: true } }
});

, .

Answer 2

:

joint.dia.Paper({ linkPinning: false })

Answer 3

Here is a good solution.

You can combine

linkView.startArrowheadMove('target');

and

evt.data.view.pointermove(evt, p.x, p.y);