Grouping and Ungrouping Fabric.js objects

Question

I\'ve created a kind of \'polygon selector\' or \'polygon maker\' using fabric.js. Each click creates a corner of the polygon, which can be selected, moved, etc... double clicki

Answer 1

if getActiveGroup() is not available then you can use this to group (after mouse selecting multiple objects):

toGroup() is only available if multiple objects are selected

var activeObj = canvas.getActiveObject();
var activegroup = activeObj.toGroup();
var objectsInGroup = activegroup.getObjects();
activegroup.clone(function(newgroup) {
    canvas.remove(activegroup);
    objectsInGroup.forEach(function(object) {
        canvas.remove(object);  
    });
    canvas.add(newgroup);
});

changes http://fabricjs.com/v2-breaking-changes-2