Method selectCtrl

index.js:507–555

( x, y )

    }

    selectCtrl( x, y ){
        let activeCtrl = null;
        const xOrg = this.canvas.width * this.config.yAxis;
        const scale = (this.canvas.width * 0.95 - xOrg)/ this.config.xMax;
        const tolerance = (7.0/scale) * (7.0/scale);
        const ctrls = [ 'ctrlA', 'ctrlB', 'radius', 'start', 'end', 'clockwise' ];
        this.nodes.forEach( node => {
            if (node.options){
                if ( activeCtrl == null){
                    ctrls.forEach( ctrlName => {
                        if (activeCtrl == null ){
                            let ctrl;
                            switch(ctrlName){
                                case 'ctrlA':
                                case 'ctrlB':
                                    ctrl = node.options[ctrlName];
                                    break;
                                case 'radius':
                                    ctrl = Geometry.calcPointOnCircle( node.x, node.y, node.options.radius, Math.PI );
                                    ctrl.type = 'radius';
                                    ctrl.node = node;
                                    break;
                                case 'start':
                                    ctrl = Geometry.calcPointOnCircle( node.x, node.y, node.options.radius, node.options.start );
                                    ctrl.type = 'start';
                                    ctrl.node = node;
                                    break;
                                case 'end':
                                    ctrl = Geometry.calcPointOnCircle( node.x, node.y, node.options.radius, node.options.end );
                                    ctrl.type = 'end';
                                    ctrl.node = node;
                                    break;
                                case 'clockwise':
                                    ctrl = { x: node.x, y: node.y + 20/scale, node, type: ctrlName };
                                    break;
                            }
                            if ( ctrl){
                                const x1 = ctrl.x - x;
                                const y1 = ctrl.y - y;
                                const sqDist = x1*x1 + y1*y1;
                                if (sqDist<tolerance) activeCtrl = ctrl;
                            }
                        }
                    });
                }
            }
        })
        return activeCtrl;
    }

    addNode( tool, x, y, insertIndex = -1 ){
        let pt = this.graph.convertScreenToPath( x, y );