phaser/Phaser/system/animation/Animation.ts

/// <reference path="../../Game.ts" />

/**
* Phaser - Animation
*
* An Animation is a single animation. It is created by the AnimationManager and belongs to Sprite objects.
*/

module Phaser {

    export class Animation {

        /**
         * Animation constructor
         * Create a new <code>Animation</code>.
         *
         * @param width     Width of the world bound.
         * @param height    Height of the world bound.
         */
        constructor(game: Game, parent: Sprite, frameData: FrameData, name: string, frames, delay: number, looped: bool) {

            this._game = game;
            this._parent = parent;
            this._frames = frames;
            this._frameData = frameData;

            this.name = name;
            this.delay = 1000 / delay;
            this.looped = looped;

            this.isFinished = false;
            this.isPlaying = false;

            this._frameIndex = 0;
            this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);

        }

        private _game: Game;
        private _parent: Sprite;
        private _frames: number[];
        private _frameData: FrameData;
        private _frameIndex: number;

        private _timeLastFrame: number;
        private _timeNextFrame: number;

        public name: string;
        public currentFrame: Frame;

        public isFinished: bool;
        public isPlaying: bool;
        public looped: bool;
        public delay: number;

        public get frameTotal(): number {
            return this._frames.length;
        }

        public get frame(): number {
            return this._frameIndex;
        }

        public set frame(value: number) {

            this.currentFrame = this._frameData.getFrame(value);

            if (this.currentFrame !== null)
            {
                this._parent.bounds.width = this.currentFrame.width;
                this._parent.bounds.height = this.currentFrame.height;
                this._frameIndex = value;
            }

        }

        public play(frameRate?: number = null, loop?: bool) {

            if (frameRate !== null)
            {
                this.delay = 1000 / frameRate;
            }

            if (loop !== undefined)
            {
                this.looped = loop;
            }

            this.isPlaying = true;
            this.isFinished = false;

            this._timeLastFrame = this._game.time.now;
            this._timeNextFrame = this._game.time.now + this.delay;

            this._frameIndex = 0;
            this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);

        }

        public restart() {

            this.isPlaying = true;
            this.isFinished = false;

            this._timeLastFrame = this._game.time.now;
            this._timeNextFrame = this._game.time.now + this.delay;

            this._frameIndex = 0;
            this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);

        }

        public stop() {

            this.isPlaying = false;
            this.isFinished = true;

        }

        public update(): bool {

            if (this.isPlaying == true && this._game.time.now >= this._timeNextFrame)
            {
                this._frameIndex++;

                if (this._frameIndex == this._frames.length)
                {
                    if (this.looped)
                    {
                        this._frameIndex = 0;
                        this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
                    }
                    else
                    {
                        this.onComplete();
                    }
                }
                else
                {
                    this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
                }

                this._timeLastFrame = this._game.time.now;
                this._timeNextFrame = this._game.time.now + this.delay;

                return true;
            }

            return false;

        }

        public destroy() {

            this._game = null;
            this._parent = null;
            this._frames = null;
            this._frameData = null;
            this.currentFrame = null;
            this.isPlaying = false;

        }

        private onComplete() {

            this.isPlaying = false;
            this.isFinished = true;
            //  callback

        }

    }

}