CreateJS - Collision detection between two createjs.Containers - createjs

Question

I currently have this working in a desktop browser but not on touch devices because I update the variables I need on mouseover. So to get around this I am trying to check for collision detection between two containers and then update the needed variables. The items should snap to the placeholder positions when a collision between the two is detected. The catch is that items and placeholders are placed dynamically any item must be able to snap to any placeholder.
var placeholders,items,selectedItem,collision,startX, startY, snapX, snapY, xpos, ypos;
var stage = new createjs.Stage("canvas");
createjs.Touch.enable(stage);
createjs.Ticker.addEventListener("tick", tick);
function init(){
xpos = 0;
ypos = 120;
container = new createjs.Container();
stage.addChild(container);
placeholders = new createjs.Container();
placeholders.name = "placeholders"
stage.addChild(placeholders);
items = new createjs.Container();
stage.addChild(items);
for(i=0;i<2;i++){
placeholder = new CustomContainer(i, "#ff0000", 100,100);
placeholder.setBounds(0,0,100,100);
placeholder.cursor = "pointer";
placeholder.x = xpos;
placeholder.name = "placeholder"+i
container.addChild(placeholder)
xpos+= (placeholder.getBounds().width + 10);
}
xpos = 0;
for(j=0;j<2;j++){
item = new CustomContainer(j, "#0000ff", 100,100);
item.active = false;
item.setBounds(0,0,100,100);
item.name = "item"+j;
item.x = xpos;
item.y = ypos;
item.startX = xpos;
item.startY = ypos;
container.addChild(item)
item.addEventListener("mousedown", selectItem);
xpos+= (item.getBounds().width + 10);
}
stage.addChild(placeholders,items);
}
function selectItem(evt) {
selectedItem = evt.target.parent;
selectedItem.mouseEnabled = false;
evt.addEventListener("mousemove", function(ev) {
moveItem(ev);
})
evt.addEventListener("mouseup", function(ev) {
selectedItem.mouseEnabled = true;
if(collision){
//New position based on the hitTest
//selectedItem.x = ;
//selectedItem.y = ;
}else{
selectedItem.x = selectedItem.startX;
selectedItem.y = selectedItem.startY;
}
})
}
function moveItem(evt){
pt = placeholders.globalToLocal(stage.mouseX, stage.mouseY);
obj = evt.target.parent;
obj.x = pt.x - 50;
obj.y = pt.y - 50;
//selectedItem collision with placeholder
collision = obj.hitTest(pt.x,pt.y)
}
function tick(evt) {
stage.update();
}
$(document).ready(init());
I am just not getting the hitTest right. You can see the working code below.
http://jsfiddle.net/non_tech_guy/2d68W/4/

Answer 1

The hittest will test pixel-perfect hit. I believe you're looking for a collision test.
Try this: https://github.com/olsn/Collision-Detection-for-EaselJS