interaction.js

    this.clearTimeout = function() {
        if (this.clickTimeout != null) {
            window.clearTimeout(this.clickTimeout);
            this.clickTimeout = null;
            return true;
        } else {
            return false;
        }
    };

    $(this.parent).mousedown($.proxy(function(evt) { 
        if (this.clearTimeout()) { return; }
        this.downEvent = evt;
        $(this.parent).one('mouseup', $.proxy(function(evt) {
            if (evt.pageY === this.downEvent.pageY &&
                evt.pageX === this.downEvent.pageX) {
                this.clickTimeout = window.setTimeout(
                    function() {
                        alert('single click');
                        // this.handleClick(evt)
                }, 300);
            }
        }, this));
    }, this));