#

API Documentation for: 0.8.1
Show: Inherited Protected Private Deprecated

# SpriteSheet Class

Extends EventDispatcher
Defined in: `SpriteSheet:41`
Module: EaselJS

Encapsulates the properties and methods associated with a sprite sheet. A sprite sheet is a series of images (usually animation frames) combined into a larger image (or images). For example, an animation consisting of eight 100x100 images could be combined into a single 400x200 sprite sheet (4 frames across by 2 high).

The data passed to the SpriteSheet constructor defines:

1. The source image or images to use.
2. The positions of individual image frames.
3. Sequences of frames that form named animations. Optional.
4. The target playback framerate. Optional.

### SpriteSheet Format

SpriteSheets are an object with two required properties (`images` and `frames`), and two optional properties (`framerate` and `animations`). This makes them easy to define in javascript code, or in JSON.

#### images

An array of source images. Images can be either an HTMlimage instance, or a uri to an image. The former is recommended to control preloading.

    images: [image1, "path/to/image2.png"],

#### frames

Defines the individual frames. There are two supported formats for frame data: When all of the frames are the same size (in a grid), use an object with `width`, `height`, `regX`, `regY`, and `count` properties.

- `width` & `height` are required and specify the dimensions of the frames
- `regX` & `regY` indicate the registration point or "origin" of the frames
- `spacing` indicate the spacing between frames
- `margin` specify the margin around the image(s)
- `count` allows you to specify the total number of frames in the spritesheet; if omitted, this will be calculated based on the dimensions of the source images and the frames. Frames will be assigned indexes based on their position in the source images (left to right, top to bottom).

     frames: {width:64, height:64, count:20, regX: 32, regY:64, spacing:0, margin:0}

If the frames are of different sizes, use an array of frame definitions. Each definition is itself an array with 4 required and 3 optional entries, in the order:

- The first four, `x`, `y`, `width`, and `height` are required and define the frame rectangle.
- The fifth, `imageIndex`, specifies the index of the source image (defaults to 0)
- The last two, `regX` and `regY` specify the registration point of the frame

    frames: [
        // x, y, width, height, imageIndex*, regX*, regY*
        [64, 0, 96, 64],
        [0, 0, 64, 64, 1, 32, 32]
        // etc.
    ]

#### animations

Optional. An object defining sequences of frames to play as named animations. Each property corresponds to an animation of the same name. Each animation must specify the frames to play, and may also include a relative playback `speed` (ex. 2 would playback at double speed, 0.5 at half), and the name of the `next` animation to sequence to after it completes.

There are three formats supported for defining the frames in an animation, which can be mixed and matched as appropriate:

1. for a single frame animation, you can simply specify the frame index

           animations: {
               sit: 7
           }

2. for an animation of consecutive frames, you can use an array with two required, and two optional entries in the order: `start`, `end`, `next`, and `speed`. This will play the frames from start to end inclusive.

           animations: {
               // start, end, next*, speed*
               run: [0, 8],
               jump: [9, 12, "run", 2]
           }

3. for non-consecutive frames, you can use an object with a `frames` property defining an array of frame indexes to play in order. The object can also specify `next` and `speed` properties.

           animations: {
               walk: {
                   frames: [1,2,3,3,2,1]
               },
               shoot: {
                   frames: [1,4,5,6],
                   next: "walk",
                   speed: 0.5
               }
           }

Note: the `speed` property was added in EaselJS 0.7.0. Earlier versions had a `frequency` property instead, which was the inverse of `speed`. For example, a value of "4" would be 1/4 normal speed in earlier versions, but is 4x normal speed in EaselJS 0.7.0+.

#### framerate

Optional. Indicates the default framerate to play this spritesheet at in frames per second. See framerate for more information.

        framerate: 20

Note that the Sprite framerate will only work if the stage update method is provided with the tick event generated by the Ticker.

        createjs.Ticker.on("tick", handleTick);
        function handleTick(event) {
            stage.update(event);
        }

### Example

To define a simple sprite sheet, with a single image "sprites.jpg" arranged in a regular 50x50 grid with three animations: "stand" showing the first frame, "run" looping frame 1-5 inclusive, and "jump" playing frame 6-8 and sequencing back to run.

        var data = {
            images: ["sprites.jpg"],
            frames: {width:50, height:50},
            animations: {
                stand:0,
                run:[1,5],
                jump:[6,8,"run"]
            }
        };
        var spriteSheet = new createjs.SpriteSheet(data);
        var animation = new createjs.Sprite(spriteSheet, "run");

### Generating SpriteSheet Images

Spritesheets can be created manually by combining images in PhotoShop, and specifying the frame size or coordinates manually, however there are a number of tools that facilitate this.

- Exporting SpriteSheets or HTML5 content from Flash Pro supports the EaselJS SpriteSheet format.
- The popular Texture Packer has EaselJS support.
- SWF animations in Flash can be exported to SpriteSheets using

### Cross Origin Issues

Warning: Images loaded cross-origin will throw cross-origin security errors when interacted with using:

- a mouse
- methods such as getObjectUnderPoint
- Filters (see Filter)
- caching (see cache)

You can get around this by setting `crossOrigin` property on your images before passing them to EaselJS, or setting the `crossOrigin` property on PreloadJS' LoadQueue or LoadItems.

        var image = new Image();
        img.crossOrigin="Anonymous";
        img.src = "http://server-with-CORS-support.com/path/to/image.jpg";

If you pass string paths to SpriteSheets, they will not work cross-origin. The server that stores the image must support cross-origin requests, or this will not work. For more information, check out CORS overview on MDN.

## Constructor

### `SpriteSheet`

(

- `data`

)

Defined in `SpriteSheet:41`

#### Parameters:

- `data` Object

  An object describing the SpriteSheet data.

- Index
- Methods
- Properties
- Events

## Item Index

### Methods

- _calculateFrames
- _dispatchEvent
- _handleImageLoad
- _parseData
- addEventListener
- clone
- dispatchEvent
- getAnimation
- getAnimations deprecated
- getFrame
- getFrameBounds
- getNumFrames
- hasEventListener
- initialize deprecated
- off
- on
- removeAllEventListeners
- removeEventListener
- toString
- willTrigger

### Properties

- _animations
- _captureListeners
- _data
- _frameHeight
- _frames
- _frameWidth
- _images
- _listeners
- _loadCount
- _margin
- _numFrames
- _regX
- _regY
- _spacing
- animations
- complete
- framerate

### Events

- complete
- getframe

## Methods

### `_calculateFrames`

() protected

Defined in `_calculateFrames:561`

### `_dispatchEvent`

(

- `eventObj`
- `eventPhase`

)
protected

Inherited from EventDispatcher: `_dispatchEvent:395`

#### Parameters:

- `eventObj` Object | String | Event
- `eventPhase` Object

### `_handleImageLoad`

() protected

Defined in `_handleImageLoad:549`

### `_parseData`

(

- `data`

)
protected

Defined in `_parseData:463`

#### Parameters:

- `data` Object

  An object describing the SpriteSheet data.

### `addEventListener`

(

- `type`
- `listener`
- `[useCapture]`

)
Function | Object

Inherited from EventDispatcher: `addEventListener:155`

Adds the specified event listener. Note that adding multiple listeners to the same function will result in multiple callbacks getting fired.

#### Example

     displayObject.addEventListener("click", handleClick);
     function handleClick(event) {
        // Click happened.
     }

#### Parameters:

- `type` String

  The string type of the event.

- `listener` Function | Object

  An object with a handleEvent method, or a function that will be called when the event is dispatched.

- `[useCapture]` Boolean optional

  For events that bubble, indicates whether to listen for the event in the capture or bubbling/target phase.

#### Returns:

Function | Object:

Returns the listener for chaining or assignment.

### `clone`

()

Defined in `clone:454`

SpriteSheet cannot be cloned. A SpriteSheet can be shared by multiple Sprite instances without cloning it.

### `dispatchEvent`

(

- `eventObj`
- `[bubbles]`
- `[cancelable]`

)
Boolean

Inherited from EventDispatcher: `dispatchEvent:300`

Dispatches the specified event to all listeners.

#### Example

     // Use a string event
     this.dispatchEvent("complete");

     // Use an Event instance
     var event = new createjs.Event("progress");
     this.dispatchEvent(event);

#### Parameters:

- `eventObj` Object | String | Event

  An object with a "type" property, or a string type. While a generic object will work, it is recommended to use a CreateJS Event instance. If a string is used, dispatchEvent will construct an Event instance if necessary with the specified type. This latter approach can be used to avoid event object instantiation for non-bubbling events that may not have any listeners.

- `[bubbles]` Boolean optional

  Specifies the `bubbles` value when a string was passed to eventObj.

- `[cancelable]` Boolean optional

  Specifies the `cancelable` value when a string was passed to eventObj.

#### Returns:

Boolean:

Returns false if `preventDefault()` was called on a cancelable event, true otherwise.

### `getAnimation`

(

- `name`

)
Object

Defined in `getAnimation:396`

Returns an object defining the specified animation. The returned object contains:

- frames: an array of the frame ids in the animation
- speed: the playback speed for this animation
- name: the name of the animation
- next: the default animation to play next. If the animation loops, the name and next property will be the same.

#### Parameters:

- `name` String

  The name of the animation to get.

#### Returns:

Object:

a generic object with frames, speed, name, and next properties.

### `getAnimations`

() Array deprecated

Defined in `getAnimations:354`

Use the animations property instead.

#### Returns:

Array:

### `getFrame`

(

- `frameIndex`

)
Object

Defined in `getFrame:412`

Returns an object specifying the image and source rect of the specified frame. The returned object has:

- an image property holding a reference to the image object in which the frame is found
- a rect property containing a Rectangle instance which defines the boundaries for the frame within that image.
- A regX and regY property corresponding to the regX/Y values for the frame.

#### Parameters:

- `frameIndex` Number

  The index of the frame.

#### Returns:

Object:

a generic object with image and rect properties. Returns null if the frame does not exist.

### `getFrameBounds`

(

- `frameIndex`
- `[rectangle]`

)
Rectangle

Defined in `getFrameBounds:429`

Returns a Rectangle instance defining the bounds of the specified frame relative to the origin. For example, a 90 x 70 frame with a regX of 50 and a regY of 40 would return:

    [x=-50, y=-40, width=90, height=70]

#### Parameters:

- `frameIndex` Number

  The index of the frame.

- `[rectangle]` Rectangle optional

  A Rectangle instance to copy the values into. By default a new instance is created.

#### Returns:

Rectangle:

A Rectangle instance. Returns null if the frame does not exist, or the image is not fully loaded.

### `getNumFrames`

(

- `animation`

)
Number

Defined in `getNumFrames:378`

Returns the total number of frames in the specified animation, or in the whole sprite sheet if the animation param is omitted. Returns 0 if the spritesheet relies on calculated frame counts, and the images have not been fully loaded.

#### Parameters:

- `animation` String

  The name of the animation to get a frame count for.

#### Returns:

Number:

The number of frames in the animation, or in the entire sprite sheet if the animation param is omitted.

### `hasEventListener`

(

- `type`

)
Boolean

Inherited from EventDispatcher: `hasEventListener:354`

Indicates whether there is at least one listener for the specified event type.

#### Parameters:

- `type` String

  The string type of the event.

#### Returns:

Boolean:

Returns true if there is at least one listener for the specified event.

### `initialize`

() deprecated protected

Inherited from EventDispatcher: `initialize:115`

REMOVED. Removed in favor of using `MySuperClass_constructor`. See extend and promote for details.

There is an inheritance tutorial distributed with EaselJS in /tutorials/Inheritance.

### `off`

(

- `type`
- `listener`
- `[useCapture]`

)

Inherited from EventDispatcher: `off:264`

A shortcut to the removeEventListener method, with the same parameters and return value. This is a companion to the .on method.

IMPORTANT: To remove a listener added with `on`, you must pass in the returned wrapper function as the listener. See on for an example.

#### Parameters:

- `type` String

  The string type of the event.

- `listener` Function | Object

  The listener function or object.

- `[useCapture]` Boolean optional

  For events that bubble, indicates whether to listen for the event in the capture or bubbling/target phase.

### `on`

(

- `type`
- `listener`
- `[scope]`
- `[once=false]`
- `[data]`
- `[useCapture=false]`

)
Function

Inherited from EventDispatcher: `on:188`

A shortcut method for using addEventListener that makes it easier to specify an execution scope, have a listener only run once, associate arbitrary data with the listener, and remove the listener.

This method works by creating an anonymous wrapper function and subscribing it with addEventListener. The wrapper function is returned for use with `removeEventListener` (or `off`).

IMPORTANT: To remove a listener added with `on`, you must pass in the returned wrapper function as the listener, or use remove. Likewise, each time you call `on` a NEW wrapper function is subscribed, so multiple calls to `on` with the same params will create multiple listeners.

#### Example

        var listener = myBtn.on("click", handleClick, null, false, {count:3});
        function handleClick(evt, data) {
            data.count -= 1;
            console.log(this == myBtn); // true - scope defaults to the dispatcher
            if (data.count == 0) {
                alert("clicked 3 times!");
                myBtn.off("click", listener);
                // alternately: evt.remove();
            }
        }

#### Parameters:

- `type` String

  The string type of the event.

- `listener` Function | Object

  An object with a handleEvent method, or a function that will be called when the event is dispatched.

- `[scope]` Object optional

  The scope to execute the listener in. Defaults to the dispatcher/currentTarget for function listeners, and to the listener itself for object listeners (ie. using handleEvent).

- `[once=false]` Boolean optional

  If true, the listener will remove itself after the first time it is triggered.

- `[data]` optional

  Arbitrary data that will be included as the second parameter when the listener is called.

- `[useCapture=false]` Boolean optional

  For events that bubble, indicates whether to listen for the event in the capture or bubbling/target phase.

#### Returns:

Function:

Returns the anonymous function that was created and assigned as the listener. This is needed to remove the listener later using .removeEventListener.

### `removeAllEventListeners`

(

- `[type]`

)

Inherited from EventDispatcher: `removeAllEventListeners:278`

Removes all listeners for the specified type, or all listeners of all types.

#### Example

     // Remove all listeners
     displayObject.removeAllEventListeners();

     // Remove all click listeners
     displayObject.removeAllEventListeners("click");

#### Parameters:

- `[type]` String optional

  The string type of the event. If omitted, all listeners for all types will be removed.

### `removeEventListener`

(

- `type`
- `listener`
- `[useCapture]`

)

Inherited from EventDispatcher: `removeEventListener:234`

Removes the specified event listener.

Important Note: that you must pass the exact function reference used when the event was added. If a proxy function, or function closure is used as the callback, the proxy/closure reference must be used - a new proxy or closure will not work.

#### Example

     displayObject.removeEventListener("click", handleClick);

#### Parameters:

- `type` String

  The string type of the event.

- `listener` Function | Object

  The listener function or object.

- `[useCapture]` Boolean optional

  For events that bubble, indicates whether to listen for the event in the capture or bubbling/target phase.

### `toString`

() String

Inherited from EventDispatcher but overwritten in `toString:445`

Returns a string representation of this object.

#### Returns:

String:

a string representation of the instance.

### `willTrigger`

(

- `type`

)
Boolean

Inherited from EventDispatcher: `willTrigger:365`

Indicates whether there is at least one listener for the specified event type on this object or any of its ancestors (parent, parent's parent, etc). A return value of true indicates that if a bubbling event of the specified type is dispatched from this object, it will trigger at least one listener.

This is similar to hasEventListener, but it searches the entire event flow for a listener, not just this object.

#### Parameters:

- `type` String

  The string type of the event.

#### Returns:

Boolean:

Returns `true` if there is at least one listener for the specified event.

## Properties

### `_animations`

Array protected

Defined in `_animations:232`

### `_captureListeners`

Object protected

Inherited from EventDispatcher: `_captureListeners:106`

### `_data`

Object protected

Defined in `_data:253`

### `_frameHeight`

Number protected

Defined in `_frameHeight:268`

### `_frames`

Array protected

Defined in `_frames:239`

### `_frameWidth`

Number protected

Defined in `_frameWidth:275`

### `_images`

Array protected

Defined in `_images:246`

### `_listeners`

Object protected

Inherited from EventDispatcher: `_listeners:99`

### `_loadCount`

Number protected

Defined in `_loadCount:260`

### `_margin`

Number protected

Defined in `_margin:310`

### `_numFrames`

Number protected

Defined in `_numFrames:282`

### `_regX`

Number protected

Defined in `_regX:289`

### `_regY`

Number protected

Defined in `_regY:296`

### `_spacing`

Number protected

Defined in `_spacing:303`

### `animations`

Array

Defined in `animations:364`

Returns an array of all available animation names available on this sprite sheet as strings.

### `complete`

Boolean

Defined in `complete:214`

Indicates whether all images are finished loading.

### `framerate`

Number

Defined in `framerate:222`

Specifies the framerate to use by default for Sprite instances using the SpriteSheet. See the Sprite class framerate for more information.

## Events

### `complete`

Defined in `complete:327`

Available since 0.6.0

Dispatched when all images are loaded. Note that this only fires if the images were not fully loaded when the sprite sheet was initialized. You should check the complete property to prior to adding a listener. Ex.

    var sheet = new SpriteSheet(data);
    if (!sheet.complete) {
        // not preloaded, listen for the complete event:
        sheet.addEventListener("complete", handler);
    }

#### Event Payload:

- `target` Object

  The object that dispatched the event.

- `type` String

  The event type.

### `getframe`

Defined in `getframe:344`

Dispatched when getFrame is called with a valid frame index. This is primarily intended for use by SpriteSheetBuilder when doing on-demand rendering.

#### Event Payload:

- `index` Number

  The frame index.

- `frame` Object

  The frame object that getFrame will return.