var ScrollbarMouseWheel = pc.createScript('scrollbarMouseWheel');


ScrollbarMouseWheel.attributes.add('steps', {
    type:'number'
});

// initialize code called once per entity
ScrollbarMouseWheel.prototype.initialize = function() {
    this.scrollbar = this.entity.scrollbar;
    this.app.mouse.on(pc.EVENT_MOUSEWHEEL, this.onMouseWheel, this);
};


ScrollbarMouseWheel.prototype.onMouseWheel = function(event) {
    //console.log("val:"+event.wheelDelta);
    this.scrollbar.value = this.scrollbar.value += (event.wheelDelta * this.steps);
};