Another (more simple) pixi.js PIXI.InteractionManager Proposal Usage

gistfile1.js

// create an new instance of a pixi stage
var stage = new PIXI.Stage(0x66FF99);
// create a renderer instance
var renderer = PIXI.autoDetectRenderer(400, 300);
 
// Implements EventListener Interface (DOM Events Level 3)
renderer.view.addEventListener('mousedown', {
    startTarget: null,
    // Implement the EventListener Interface
    handleEvent: function (event) {
        switch (event.type) {
 
        case 'mousedown':
            if (this.startTarget)
                return;

            var rect = render.view.getBoundingClientRect();
            var target = stage.getInteractiveDisplayObjectAtPoint(event.pageX - rect.left, event.pageY - rect.top);
            if (target) {
                event.preventDefault();
                target.activate();
                this.startTarget = target;
                window.addEventListener('mousemove', this);
                window.addEventListener('mouseup', this);
                window.addEventListener('mouseout', this);
            }
            break;
 
        case 'mousemove':
            var rect = render.view.getBoundingClientRect();
            var target = stage.getInteractiveDisplayObjectAtPoint(event.pageX - rect.left, event.pageY - rect.top);
            if (this.startTarget !== target) {
                this.startTarget.deactivate();
            } else {
                target.activate();
            }
            break;

        case 'mouseup':
        case 'mouseout':
            window.removeEventListener('mousemove', this);
            window.removeEventListener('mouseup', this);
            window.removeEventListener('mouseout', this);
            this.startTarget.deactivate();
            this.startTarget = null;
            break;
        }
    }
});