import EventEmitter from 'eventemitter3';
import CONST from '../const';
import TransformStatic from './TransformStatic';
import Transform from './Transform';
import Bounds from './Bounds';
import math from '../math';
//_tempDisplayObjectParent = new DisplayObject();
/**
* The base class for all objects that are rendered on the screen.
* This is an abstract class and should not be used on its own rather it should be extended.
*
* @class
* @extends EventEmitter
* @mixes PIXI.interaction.interactiveTarget
* @memberof PIXI
*/
class DisplayObject extends EventEmitter
{
constructor()
{
super();
let TransformClass = CONST.TRANSFORM_MODE.DEFAULT === CONST.TRANSFORM_MODE.STATIC ? TransformStatic : Transform;
this.tempDisplayObjectParent = null;
//TODO: need to create Transform from factory
/**
* World transform and local transform of this object.
* This will be reworked in v4.1, please do not use it yet unless you know what are you doing!
*
* @member {PIXI.TransformBase}
*/
this.transform = new TransformClass();
/**
* The opacity of the object.
*
* @member {number}
*/
this.alpha = 1;
/**
* The visibility of the object. If false the object will not be drawn, and
* the updateTransform function will not be called.
*
* @member {boolean}
*/
this.visible = true;
/**
* Can this object be rendered, if false the object will not be drawn but the updateTransform
* methods will still be called.
*
* @member {boolean}
*/
this.renderable = true;
/**
* The display object container that contains this display object.
*
* @member {PIXI.Container}
* @readonly
*/
this.parent = null;
/**
* The multiplied alpha of the displayObject
*
* @member {number}
* @readonly
*/
this.worldAlpha = 1;
/**
* The area the filter is applied to. This is used as more of an optimisation
* rather than figuring out the dimensions of the displayObject each frame you can set this rectangle
*
* Also works as an interaction mask
*
* @member {PIXI.Rectangle}
*/
this.filterArea = null;
this._filters = null;
this._enabledFilters = null;
/**
* The bounds object, this is used to calculate and store the bounds of the displayObject
*
* @member {PIXI.Rectangle}
* @private
*/
this._bounds = new Bounds();
this._boundsID = 0;
this._lastBoundsID = -1;
this._boundsRect = null;
this._localBoundsRect = null;
/**
* The original, cached mask of the object
*
* @member {PIXI.Rectangle}
* @private
*/
this._mask = null;
}
get _tempDisplayObjectParent() {
if (this.tempDisplayObjectParent === null) {
this.tempDisplayObjectParent = new DisplayObject();
}
return this.tempDisplayObjectParent;
}
/*
* Updates the object transform for rendering
*
* TODO - Optimization pass!
*/
updateTransform()
{
this.transform.updateTransform(this.parent.transform);
// multiply the alphas..
this.worldAlpha = this.alpha * this.parent.worldAlpha;
this._bounds.updateID++;
}
/**
* recursively updates transform of all objects from the root to this one
* internal function for toLocal()
*/
_recursivePostUpdateTransform()
{
if (this.parent)
{
this.parent._recursivePostUpdateTransform();
this.transform.updateTransform(this.parent.transform);
}
else
{
this.transform.updateTransform(this._tempDisplayObjectParent.transform);
}
}
/**
*
*
* Retrieves the bounds of the displayObject as a rectangle object.
* @param skipUpdate {boolean} setting to true will stop the transforms of the scene graph from being updated. This means the calculation returned MAY be out of date BUT will give you a nice performance boost
* @param rect {PIXI.Rectangle} Optional rectangle to store the result of the bounds calculation
* @return {PIXI.Rectangle} the rectangular bounding area
*/
getBounds(skipUpdate, rect)
{
if(!skipUpdate)
{
if(!this.parent)
{
this.parent = this._tempDisplayObjectParent;
this.parent.transform._worldID++;
this.updateTransform();
this.parent = null;
}
else
{
this._recursivePostUpdateTransform();
this.updateTransform();
}
}
if(this._boundsID !== this._lastBoundsID)
{
this.calculateBounds();
}
if(!rect)
{
if(!this._boundsRect)
{
this._boundsRect = new math.Rectangle();
}
rect = this._boundsRect;
}
return this._bounds.getRectangle(rect);
}
/**
* Retrieves the local bounds of the displayObject as a rectangle object
* @param rect {PIXI.Rectangle} Optional rectangle to store the result of the bounds calculation
* @return {PIXI.Rectangle} the rectangular bounding area
*/
getLocalBounds(rect)
{
let transformRef = this.transform;
let parentRef = this.parent;
this.parent = null;
this.transform = this._tempDisplayObjectParent.transform;
if(!rect)
{
if(!this._localBoundsRect)
{
this._localBoundsRect = new math.Rectangle();
}
rect = this._localBoundsRect;
}
let bounds = this.getBounds(false, rect);
this.parent = parentRef;
this.transform = transformRef;
return bounds;
}
/**
* Calculates the global position of the display object
*
* @param position {PIXI.Point} The world origin to calculate from
* @return {PIXI.Point} A point object representing the position of this object
*/
toGlobal(position, point, skipUpdate)
{
if(!skipUpdate)
{
this._recursivePostUpdateTransform();
// this parent check is for just in case the item is a root object.
// If it is we need to give it a temporary parent so that displayObjectUpdateTransform works correctly
// this is mainly to avoid a parent check in the main loop. Every little helps for performance :)
if(!this.parent)
{
this.parent = this._tempDisplayObjectParent;
this.displayObjectUpdateTransform();
this.parent = null;
}
else
{
this.displayObjectUpdateTransform();
}
}
// don't need to update the lot
return this.worldTransform.apply(position, point);
}
/**
* Calculates the local position of the display object relative to another point
*
* @param position {PIXI.Point} The world origin to calculate from
* @param [from] {PIXI.DisplayObject} The DisplayObject to calculate the global position from
* @param [point] {PIXI.Point} A Point object in which to store the value, optional (otherwise will create a new Point)
* @return {PIXI.Point} A point object representing the position of this object
*/
toLocal(position, from, point, skipUpdate)
{
if (from)
{
position = from.toGlobal(position, point, skipUpdate);
}
if(! skipUpdate)
{
this._recursivePostUpdateTransform();
// this parent check is for just in case the item is a root object.
// If it is we need to give it a temporary parent so that displayObjectUpdateTransform works correctly
// this is mainly to avoid a parent check in the main loop. Every little helps for performance :)
if(!this.parent)
{
this.parent = this._tempDisplayObjectParent;
this.displayObjectUpdateTransform();
this.parent = null;
}
else
{
this.displayObjectUpdateTransform();
}
}
// simply apply the matrix..
return this.worldTransform.applyInverse(position, point);
}
/**
* Renders the object using the WebGL renderer
*
* @param renderer {PIXI.WebGLRenderer} The renderer
*/
renderWebGL(renderer) // eslint-disable-line no-unused-vars
{
// OVERWRITE;
}
/**
* Renders the object using the Canvas renderer
*
* @param renderer {PIXI.CanvasRenderer} The renderer
*/
renderCanvas(renderer) // eslint-disable-line no-unused-vars
{
// OVERWRITE;
}
/**
* Set the parent Container of this DisplayObject
*
* @param container {PIXI.Container} The Container to add this DisplayObject to
* @return {PIXI.Container} The Container that this DisplayObject was added to
*/
setParent(container)
{
if (!container || !container.addChild)
{
throw new Error('setParent: Argument must be a Container');
}
container.addChild(this);
return container;
}
/**
* Convenience function to set the postion, scale, skew and pivot at once.
*
* @param [x=0] {number} The X position
* @param [y=0] {number} The Y position
* @param [scaleX=1] {number} The X scale value
* @param [scaleY=1] {number} The Y scale value
* @param [rotation=0] {number} The rotation
* @param [skewX=0] {number} The X skew value
* @param [skewY=0] {number} The Y skew value
* @param [pivotX=0] {number} The X pivot value
* @param [pivotY=0] {number} The Y pivot value
* @return {PIXI.DisplayObject} The DisplayObject instance
*/
setTransform(x, y, scaleX, scaleY, rotation, skewX, skewY, pivotX, pivotY)
{
this.position.x = x || 0;
this.position.y = y || 0;
this.scale.x = !scaleX ? 1 : scaleX;
this.scale.y = !scaleY ? 1 : scaleY;
this.rotation = rotation || 0;
this.skew.x = skewX || 0;
this.skew.y = skewY || 0;
this.pivot.x = pivotX || 0;
this.pivot.y = pivotY || 0;
return this;
}
/**
* Base destroy method for generic display objects. This will automatically
* remove the display object from its parent Container as well as remove
* all current event listeners and internal references. Do not use a DisplayObject
* after calling `destroy`.
*/
destroy()
{
this.removeAllListeners();
if (this.parent)
{
this.parent.removeChild(this);
}
this.transform = null;
this.parent = null;
this._bounds = null;
this._currentBounds = null;
this._mask = null;
this.filterArea = null;
this.interactive = false;
this.interactiveChildren = false;
}
/**
* The position of the displayObject on the x axis relative to the local coordinates of the parent.
* An alias to position.x
*
* @member {number}
* @memberof PIXI.DisplayObject#
*/
get x()
{
return this.position.x;
}
set x(value)
{
this.transform.position.x = value;
}
/**
* The position of the displayObject on the y axis relative to the local coordinates of the parent.
* An alias to position.y
*
* @member {number}
* @memberof PIXI.DisplayObject#
*/
get y()
{
return this.position.y;
}
set y(value)
{
this.transform.position.y = value;
}
/**
* Current transform of the object based on world (parent) factors
*
* @member {PIXI.Matrix}
* @memberof PIXI.DisplayObject#
* @readonly
*/
get worldTransform()
{
return this.transform.worldTransform;
}
/**
* Current transform of the object based on local factors: position, scale, other stuff
*
* @member {PIXI.Matrix}
* @memberof PIXI.DisplayObject#
* @readonly
*/
get localTransform()
{
return this.transform.localTransform;
}
/**
* The coordinate of the object relative to the local coordinates of the parent.
* Assignment by value since pixi-v4.
*
* @member {PIXI.Point|PIXI.ObservablePoint}
* @memberof PIXI.DisplayObject#
*/
get position()
{
return this.transform.position;
}
set position(value) {
this.transform.position.copy(value);
}
/**
* The scale factor of the object.
* Assignment by value since pixi-v4.
*
* @member {PIXI.Point|PIXI.ObservablePoint}
* @memberof PIXI.DisplayObject#
*/
get scale() {
return this.transform.scale;
}
set scale(value) {
this.transform.scale.copy(value);
}
/**
* The pivot point of the displayObject that it rotates around
* Assignment by value since pixi-v4.
*
* @member {PIXI.Point|PIXI.ObservablePoint}
* @memberof PIXI.DisplayObject#
*/
get pivot() {
return this.transform.pivot;
}
set pivot(value) {
this.transform.pivot.copy(value);
}
/**
* The skew factor for the object in radians.
* Assignment by value since pixi-v4.
*
* @member {PIXI.ObservablePoint}
* @memberof PIXI.DisplayObject#
*/
get skew() {
return this.transform.skew;
}
set skew(value) {
this.transform.skew.copy(value);
}
/**
* The rotation of the object in radians.
*
* @member {number}
* @memberof PIXI.DisplayObject#
*/
get rotation()
{
return this.transform.rotation;
}
set rotation(value)
{
this.transform.rotation = value;
}
/**
* Indicates if the sprite is globally visible.
*
* @member {boolean}
* @memberof PIXI.DisplayObject#
* @readonly
*/
get worldVisible()
{
let item = this;
do {
if (!item.visible)
{
return false;
}
item = item.parent;
} while (item);
return true;
}
/**
* Sets a mask for the displayObject. A mask is an object that limits the visibility of an object to the shape of the mask applied to it.
* In PIXI a regular mask must be a PIXI.Graphics or a PIXI.Sprite object. This allows for much faster masking in canvas as it utilises shape clipping.
* To remove a mask, set this property to null.
*
* @todo For the moment, PIXI.CanvasRenderer doesn't support PIXI.Sprite as mask.
*
* @member {PIXI.Graphics|PIXI.Sprite}
* @memberof PIXI.DisplayObject#
*/
get mask()
{
return this._mask;
}
set mask(value)
{
if (this._mask)
{
this._mask.renderable = true;
}
this._mask = value;
if (this._mask)
{
this._mask.renderable = false;
}
}
/**
* Sets the filters for the displayObject.
* * IMPORTANT: This is a webGL only feature and will be ignored by the canvas renderer.
* To remove filters simply set this property to 'null'
*
* @member {PIXI.AbstractFilter[]}
* @memberof PIXI.DisplayObject#
*/
get filters()
{
return this._filters && this._filters.slice();
}
set filters(value)
{
this._filters = value && value.slice();
}
}
// performance increase to avoid using call.. (10x faster)
DisplayObject.prototype.displayObjectUpdateTransform = DisplayObject.prototype.updateTransform;
export default DisplayObject;
