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<!DOCTYPE html>
<html lang="en">
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<meta charset="utf-8">
<title>src/pixi/DisplayObjectContainer.js - Pixi.JS</title>
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<h1 class="file-heading">File: src/pixi/DisplayObjectContainer.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* A DisplayObjectContainer represents a collection of display objects. It is the base class of all display objects that act as a container for other objects.
* @class DisplayObjectContainer
* @extends DisplayObject
* @constructor
*/
PIXI.DisplayObjectContainer = function()
{
PIXI.DisplayObject.call( this );
/**
* [read-only] The of children of this container.
* @property children {Array}
*/
this.children = [];
//s
this.renderable = false;
}
// constructor
PIXI.DisplayObjectContainer.constructor = PIXI.DisplayObjectContainer;
PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
/**
* Adds a child to the container.
* @method addChild
* @param DisplayObject {DisplayObject}
*/
PIXI.DisplayObjectContainer.prototype.addChild = function(child)
{
if(child.parent != undefined)
{
child.parent.removeChild(child)
}
child.parent = this;
child.childIndex = this.children.length;
this.children.push(child);
if(this.stage)
{
this.stage.__addChild(child);
}
}
/**
* Adds a child to the container at a specified index. If the index is out of bounds an error will be thrown
* @method addChildAt
* @param DisplayObject {DisplayObject}
* @param index {Number}
*/
PIXI.DisplayObjectContainer.prototype.addChildAt = function(child, index)
{
if(index >= 0 && index <= this.children.length)
{
if(child.parent != undefined)
{
child.parent.removeChild(child);
}
if (index == this.children.length)
{
this.children.push(child);
}
else
{
this.children.splice(index, 0, child);
}
child.parent = this;
child.childIndex = index;
var length = this.children.length;
for (var i=index; i < length; i++)
{
this.children[i].childIndex = i;
}
if(this.stage)
{
this.stage.__addChild(child);
}
}
else
{
// error!
throw new Error(child + " The index "+ index +" supplied is out of bounds " + this.children.length);
}
}
/**
* Swaps the depth of 2 displayObjects
* @method swapChildren
* @param DisplayObject {DisplayObject}
* @param DisplayObject2 {DisplayObject}
*/
PIXI.DisplayObjectContainer.prototype.swapChildren = function(child, child2)
{
// TODO I already know this??
var index = this.children.indexOf( child );
var index2 = this.children.indexOf( child2 );
if ( index !== -1 && index2 !== -1 )
{
// cool
if(this.stage)
{
// this is to satisfy the webGL batching..
// TODO sure there is a nicer way to achieve this!
this.stage.__removeChild(child);
this.stage.__removeChild(child2);
this.stage.__addChild(child);
this.stage.__addChild(child2);
}
// swap the indexes..
child.childIndex = index2;
child2.childIndex = index;
// swap the positions..
this.children[index] = child2;
this.children[index2] = child;
}
else
{
throw new Error(child + " Both the supplied DisplayObjects must be a child of the caller " + this);
}
}
/**
* Returns the Child at the specified index
* @method getChildAt
* @param index {Number}
*/
PIXI.DisplayObjectContainer.prototype.getChildAt = function(index)
{
if(index >= 0 && index < this.children.length)
{
return this.children[index];
}
else
{
throw new Error(child + " Both the supplied DisplayObjects must be a child of the caller " + this);
}
}
/**
* Removes a child from the container.
* @method removeChild
* @param DisplayObject {DisplayObject}
*/
PIXI.DisplayObjectContainer.prototype.removeChild = function(child)
{
var index = this.children.indexOf( child );
if ( index !== -1 )
{
if(this.stage)this.stage.__removeChild(child);
child.parent = undefined;
//child.childIndex = 0
this.children.splice( index, 1 );
// update in dexs!
for(var i=index,j=this.children.length; i<j; i++)
{
this.children[i].childIndex -= 1;
}
}
else
{
throw new Error(child + " The supplied DisplayObject must be a child of the caller " + this);
}
}
/**
* @private
*/
PIXI.DisplayObjectContainer.prototype.updateTransform = function()
{
if(!this.visible)return;
PIXI.DisplayObject.prototype.updateTransform.call( this );
for(var i=0,j=this.children.length; i<j; i++)
{
this.children[i].updateTransform();
}
}
</pre>
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