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<h1 class="file-heading">File: src/pixi/display/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
* @type Array<DisplayObject>
* @readOnly
*/
this.children = [];
};
// constructor
PIXI.DisplayObjectContainer.prototype = Object.create( PIXI.DisplayObject.prototype );
PIXI.DisplayObjectContainer.prototype.constructor = PIXI.DisplayObjectContainer;
/**
* The width of the displayObjectContainer, setting this will actually modify the scale to achieve the value set
*
* @property width
* @type Number
*/
/*
Object.defineProperty(PIXI.DisplayObjectContainer.prototype, 'width', {
get: function() {
return this.scale.x * this.getLocalBounds().width;
},
set: function(value) {
this.scale.x = value / (this.getLocalBounds().width/this.scale.x);
this._width = value;
}
});
*/
/**
* The height of the displayObjectContainer, setting this will actually modify the scale to achieve the value set
*
* @property height
* @type Number
*/
/*
Object.defineProperty(PIXI.DisplayObjectContainer.prototype, 'height', {
get: function() {
return this.scale.y * this.getLocalBounds().height;
},
set: function(value) {
this.scale.y = value / (this.getLocalBounds().height/this.scale.y);
this._height = value;
}
});
*/
/**
* Adds a child to the container.
*
* @method addChild
* @param child {DisplayObject} The DisplayObject to add to the container
*/
PIXI.DisplayObjectContainer.prototype.addChild = function(child)
{
this.addChildAt(child, this.children.length);
};
/**
* 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 child {DisplayObject} The child to add
* @param index {Number} The index to place the child in
*/
PIXI.DisplayObjectContainer.prototype.addChildAt = function(child, index)
{
if(index >= 0 && index <= this.children.length)
{
if(child.parent)
{
child.parent.removeChild(child);
}
child.parent = this;
this.children.splice(index, 0, child);
if(this.stage)child.setStageReference(this.stage);
}
else
{
throw new Error(child + ' The index '+ index +' supplied is out of bounds ' + this.children.length);
}
};
/**
* [NYI] Swaps the depth of 2 displayObjects
*
* @method swapChildren
* @param child {DisplayObject}
* @param child2 {DisplayObject}
* @private
*/
PIXI.DisplayObjectContainer.prototype.swapChildren = function(child, child2)
{
if(child === child2) {
return;
}
var index1 = this.children.indexOf(child);
var index2 = this.children.indexOf(child2);
if(index1 < 0 || index2 < 0) {
throw new Error('swapChildren: Both the supplied DisplayObjects must be a child of the caller.');
}
this.children[index1] = child2;
this.children[index2] = child;
};
/**
* Returns the child at the specified index
*
* @method getChildAt
* @param index {Number} The index to get the child from
*/
PIXI.DisplayObjectContainer.prototype.getChildAt = function(index)
{
if(index >= 0 && index < this.children.length)
{
return this.children[index];
}
else
{
throw new Error('The supplied DisplayObjects must be a child of the caller ' + this);
}
};
/**
* Removes a child from the container.
*
* @method removeChild
* @param child {DisplayObject} The DisplayObject to remove
*/
PIXI.DisplayObjectContainer.prototype.removeChild = function(child)
{
var index = this.children.indexOf( child );
if ( index !== -1 )
{
// update the stage reference..
if(this.stage)child.removeStageReference();
child.parent = undefined;
this.children.splice( index, 1 );
}
else
{
throw new Error(child + ' The supplied DisplayObject must be a child of the caller ' + this);
}
};
/*
* Updates the container's childrens transform for rendering
*
* @method updateTransform
* @private
*/
PIXI.DisplayObjectContainer.prototype.updateTransform = function()
{
//this._currentBounds = null;
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();
}
};
PIXI.DisplayObjectContainer.prototype.getBounds = function()
{
if(this.children.length === 0)return PIXI.EmptyRectangle;
// TODO the bounds have already been calculated this render session so return what we have
var minX = Infinity;
var minY = Infinity;
var maxX = -Infinity;
var maxY = -Infinity;
var childBounds;
var childMaxX;
var childMaxY;
for(var i=0,j=this.children.length; i<j; i++)
{
var child = this.children[i];
if(!child.visible)continue;
childBounds = this.children[i].getBounds();
minX = minX < childBounds.x ? minX : childBounds.x;
minY = minY < childBounds.y ? minY : childBounds.y;
childMaxX = childBounds.width + childBounds.x;
childMaxY = childBounds.height + childBounds.y;
maxX = maxX > childMaxX ? maxX : childMaxX;
maxY = maxY > childMaxY ? maxY : childMaxY;
}
var bounds = this._bounds;
bounds.x = minX;
bounds.y = minY;
bounds.width = maxX - minX;
bounds.height = maxY - minY;
// TODO: store a reference so that if this function gets called again in the render cycle we do not have to recalculate
//this._currentBounds = bounds;
return bounds;
};
PIXI.DisplayObjectContainer.prototype.setStageReference = function(stage)
{
this.stage = stage;
if(this._interactive)this.stage.dirty = true;
for(var i=0,j=this.children.length; i<j; i++)
{
var child = this.children[i];
child.setStageReference(stage);
}
};
PIXI.DisplayObjectContainer.prototype.removeStageReference = function()
{
for(var i=0,j=this.children.length; i<j; i++)
{
var child = this.children[i];
child.removeStageReference();
}
if(this._interactive)this.stage.dirty = true;
this.stage = null;
};
PIXI.DisplayObjectContainer.prototype._renderWebGL = function(renderSession)
{
if(!this.visible || this.alpha <= 0)return;
var i,j;
if(this._mask || this._filters)
{
if(this._mask)
{
renderSession.spriteBatch.stop();
renderSession.maskManager.pushMask(this.mask, renderSession);
renderSession.spriteBatch.start();
}
if(this._filters)
{
renderSession.spriteBatch.flush();
renderSession.filterManager.pushFilter(this._filterBlock);
}
// simple render children!
for(i=0,j=this.children.length; i<j; i++)
{
this.children[i]._renderWebGL(renderSession);
}
renderSession.spriteBatch.stop();
if(this._filters)renderSession.filterManager.popFilter();
if(this._mask)renderSession.maskManager.popMask(renderSession);
renderSession.spriteBatch.start();
}
else
{
// simple render children!
for(i=0,j=this.children.length; i<j; i++)
{
this.children[i]._renderWebGL(renderSession);
}
}
};
PIXI.DisplayObjectContainer.prototype._renderCanvas = function(renderSession)
{
if(this.visible === false || this.alpha === 0)return;
if(this._mask)
{
renderSession.maskManager.pushMask(this._mask, renderSession.context);
}
for(var i=0,j=this.children.length; i<j; i++)
{
var child = this.children[i];
child._renderCanvas(renderSession);
}
if(this._mask)
{
renderSession.maskManager.popMask(renderSession.context);
}
};
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