fbird/frameworks/cocos2d-html5/extensions/ccui/uiwidgets/UISlider.js

/****************************************************************************
 Copyright (c) 2011-2012 cocos2d-x.org
 Copyright (c) 2013-2014 Chukong Technologies Inc.

 http://www.cocos2d-x.org

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
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 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ****************************************************************************/

/**
 * The Slider control of Cocos UI.
 * @class
 * @extends ccui.Widget
 *
 * @property {Number}   percent     - The current progress of loadingbar
 */
ccui.Slider = ccui.Widget.extend(/** @lends ccui.Slider# */{
    _barRenderer: null,
    _progressBarRenderer: null,
    _barTextureSize: null,
    _progressBarTextureSize: null,
    _slidBallNormalRenderer: null,
    _slidBallPressedRenderer: null,
    _slidBallDisabledRenderer: null,
    _slidBallRenderer: null,
    _barLength: 0,
    _percent: 0,
    _scale9Enabled: false,
    _prevIgnoreSize: true,
    _textureFile: "",
    _progressBarTextureFile: "",
    _slidBallNormalTextureFile: "",
    _slidBallPressedTextureFile: "",
    _slidBallDisabledTextureFile: "",
    _capInsetsBarRenderer: null,
    _capInsetsProgressBarRenderer: null,
    _sliderEventListener: null,
    _sliderEventSelector: null,
    _barTexType: ccui.Widget.LOCAL_TEXTURE,
    _progressBarTexType: ccui.Widget.LOCAL_TEXTURE,
    _ballNTexType: ccui.Widget.LOCAL_TEXTURE,
    _ballPTexType: ccui.Widget.LOCAL_TEXTURE,
    _ballDTexType: ccui.Widget.LOCAL_TEXTURE,
    _isTextureLoaded: false,
    _className: "Slider",
    _barRendererAdaptDirty: true,
    _progressBarRendererDirty: true,
    _unifySize: false,
    _zoomScale: 0.1,

    _sliderBallNormalTextureScaleX: 1,
    _sliderBallNormalTextureScaleY: 1,

    /**
     * allocates and initializes a UISlider.
     * Constructor of ccui.Slider. override it to extend the construction behavior, remember to call "this._super()" in the extended "ctor" function.
     * @example
     * // example
     * var uiSlider = new ccui.Slider();
     */
    ctor: function (barTextureName, normalBallTextureName, resType) {
        this._barTextureSize = cc.size(0, 0);
        this._progressBarTextureSize = cc.size(0, 0);
        this._capInsetsBarRenderer = cc.rect(0, 0, 0, 0);
        this._capInsetsProgressBarRenderer = cc.rect(0, 0, 0, 0);
        ccui.Widget.prototype.ctor.call(this);

        resType = resType || 0;
        this.setTouchEnabled(true);
        if (barTextureName) {
            this.loadBarTexture(barTextureName, resType);
        }
        if (normalBallTextureName) {
            this.loadSlidBallTextures(normalBallTextureName, resType);
        }
    },

    _initRenderer: function () {
        //todo use Scale9Sprite
        this._barRenderer = new cc.Sprite();
        this._progressBarRenderer = new cc.Sprite();
        this._progressBarRenderer.setAnchorPoint(0.0, 0.5);
        this.addProtectedChild(this._barRenderer, ccui.Slider.BASEBAR_RENDERER_ZORDER, -1);
        this.addProtectedChild(this._progressBarRenderer, ccui.Slider.PROGRESSBAR_RENDERER_ZORDER, -1);
        this._slidBallNormalRenderer = new cc.Sprite();
        this._slidBallPressedRenderer = new cc.Sprite();
        this._slidBallPressedRenderer.setVisible(false);
        this._slidBallDisabledRenderer = new cc.Sprite();
        this._slidBallDisabledRenderer.setVisible(false);
        this._slidBallRenderer = new cc.Node();
        this._slidBallRenderer.addChild(this._slidBallNormalRenderer);
        this._slidBallRenderer.addChild(this._slidBallPressedRenderer);
        this._slidBallRenderer.addChild(this._slidBallDisabledRenderer);
        this._slidBallRenderer.setCascadeColorEnabled(true);
        this._slidBallRenderer.setCascadeOpacityEnabled(true);

        this.addProtectedChild(this._slidBallRenderer, ccui.Slider.BALL_RENDERER_ZORDER, -1);
    },

    /**
     * Loads texture for slider bar.
     * @param {String} fileName
     * @param {ccui.Widget.LOCAL_TEXTURE|ccui.Widget.PLIST_TEXTURE} texType
     */
    loadBarTexture: function (fileName, texType) {
        if (!fileName) {
            return;
        }
        texType = texType || ccui.Widget.LOCAL_TEXTURE;
        this._textureFile = fileName;
        this._barTexType = texType;
        var barRenderer = this._barRenderer;

        var self = this;
        if (!barRenderer._textureLoaded) {
            barRenderer.addEventListener("load", function () {
                self.loadBarTexture(self._textureFile, self._barTexType);
            });
        }

        switch (this._barTexType) {
            case ccui.Widget.LOCAL_TEXTURE:
                //SetTexture cannot load resource
                barRenderer.initWithFile(fileName);
                break;
            case ccui.Widget.PLIST_TEXTURE:
                //SetTexture cannot load resource
                barRenderer.initWithSpriteFrameName(fileName);
                break;
            default:
                break;
        }
        this._updateChildrenDisplayedRGBA();

        this._barRendererAdaptDirty = true;
        this._progressBarRendererDirty = true;
        this._updateContentSizeWithTextureSize(this._barRenderer.getContentSize());
        this._findLayout();
        this._barTextureSize = this._barRenderer.getContentSize();
    },

    /**
     * Loads dark state texture for slider progress bar.
     * @param {String} fileName
     * @param {ccui.Widget.LOCAL_TEXTURE|ccui.Widget.PLIST_TEXTURE} texType
     */
    loadProgressBarTexture: function (fileName, texType) {
        if (!fileName) {
            return;
        }
        texType = texType || ccui.Widget.LOCAL_TEXTURE;
        this._progressBarTextureFile = fileName;
        this._progressBarTexType = texType;
        var progressBarRenderer = this._progressBarRenderer;

        var self = this;
        if (!progressBarRenderer._textureLoaded) {
            progressBarRenderer.addEventListener("load", function () {
                self.loadProgressBarTexture(self._progressBarTextureFile, self._progressBarTexType);
            });
        }

        switch (this._progressBarTexType) {
            case ccui.Widget.LOCAL_TEXTURE:
                //SetTexture cannot load resource
                progressBarRenderer.initWithFile(fileName);
                break;
            case ccui.Widget.PLIST_TEXTURE:
                //SetTexture cannot load resource
                progressBarRenderer.initWithSpriteFrameName(fileName);
                break;
            default:
                break;
        }
        this._updateChildrenDisplayedRGBA();

        this._progressBarRenderer.setAnchorPoint(cc.p(0, 0.5));
        var tz = this._progressBarRenderer.getContentSize();
        this._progressBarTextureSize = {width: tz.width, height: tz.height};
        this._progressBarRendererDirty = true;
        this._findLayout();
    },

    /**
     * Sets if slider is using scale9 renderer.
     * @param {Boolean} able
     */
    setScale9Enabled: function (able) {
        //todo use setScale9Enabled
        if (this._scale9Enabled === able)
            return;

        this._scale9Enabled = able;
        this.removeProtectedChild(this._barRenderer, true);
        this.removeProtectedChild(this._progressBarRenderer, true);
        this._barRenderer = null;
        this._progressBarRenderer = null;
        if (this._scale9Enabled) {
            this._barRenderer = new ccui.Scale9Sprite();
            this._progressBarRenderer = new ccui.Scale9Sprite();
        } else {
            this._barRenderer = new cc.Sprite();
            this._progressBarRenderer = new cc.Sprite();
        }
        this.loadBarTexture(this._textureFile, this._barTexType);
        this.loadProgressBarTexture(this._progressBarTextureFile, this._progressBarTexType);
        this.addProtectedChild(this._barRenderer, ccui.Slider.BASEBAR_RENDERER_ZORDER, -1);
        this.addProtectedChild(this._progressBarRenderer, ccui.Slider.PROGRESSBAR_RENDERER_ZORDER, -1);
        if (this._scale9Enabled) {
            var ignoreBefore = this._ignoreSize;
            this.ignoreContentAdaptWithSize(false);
            this._prevIgnoreSize = ignoreBefore;
        } else {
            this.ignoreContentAdaptWithSize(this._prevIgnoreSize);
        }
        this.setCapInsetsBarRenderer(this._capInsetsBarRenderer);
        this.setCapInsetProgressBarRenderer(this._capInsetsProgressBarRenderer);
        this._barRendererAdaptDirty = true;
        this._progressBarRendererDirty = true;
    },

    /**
     * Returns slider is using scale9 renderer or not.
     * @returns {Boolean}
     */
    isScale9Enabled: function () {
        return this._scale9Enabled;
    },

    /**
     * override "ignoreContentAdaptWithSize" method of widget.
     * @param {Boolean} ignore
     */
    ignoreContentAdaptWithSize: function (ignore) {
        if (!this._scale9Enabled || (this._scale9Enabled && !ignore)) {
            ccui.Widget.prototype.ignoreContentAdaptWithSize.call(this, ignore);
            this._prevIgnoreSize = ignore;
        }
    },

    /**
     * Sets capinsets for slider, if slider is using scale9 renderer.
     * @param {cc.Rect} capInsets
     */
    setCapInsets: function (capInsets) {
        this.setCapInsetsBarRenderer(capInsets);
        this.setCapInsetProgressBarRenderer(capInsets);
    },

    /**
     * Sets capinsets for slider's renderer, if slider is using scale9 renderer.
     * @param {cc.Rect} capInsets
     */
    setCapInsetsBarRenderer: function (capInsets) {
        if (!capInsets)
            return;
        var locInsets = this._capInsetsBarRenderer;
        locInsets.x = capInsets.x;
        locInsets.y = capInsets.y;
        locInsets.width = capInsets.width;
        locInsets.height = capInsets.height;
        if (!this._scale9Enabled)
            return;
        this._barRenderer.setCapInsets(capInsets);
    },

    /**
     * Returns cap insets for slider.
     * @returns {cc.Rect}
     */
    getCapInsetsBarRenderer: function () {
        return cc.rect(this._capInsetsBarRenderer);
    },

    /**
     * Sets capinsets of ProgressBar for slider, if slider is using scale9 renderer.
     * @param {cc.Rect} capInsets
     */
    setCapInsetProgressBarRenderer: function (capInsets) {
        if (!capInsets)
            return;
        var locInsets = this._capInsetsProgressBarRenderer;
        locInsets.x = capInsets.x;
        locInsets.y = capInsets.y;
        locInsets.width = capInsets.width;
        locInsets.height = capInsets.height;
        if (!this._scale9Enabled)
            return;
        this._progressBarRenderer.setCapInsets(capInsets);
    },

    /**
     * Returns cap insets of ProgressBar for slider.
     * @returns {cc.Rect}
     */
    getCapInsetsProgressBarRenderer: function () {
        return cc.rect(this._capInsetsProgressBarRenderer);
    },

    /**
     * Loads textures for slider ball.
     * @param {String} normal
     * @param {String} pressed
     * @param {String} disabled
     * @param {ccui.Widget.LOCAL_TEXTURE|ccui.Widget.PLIST_TEXTURE} texType
     */
    loadSlidBallTextures: function (normal, pressed, disabled, texType) {
        this.loadSlidBallTextureNormal(normal, texType);
        this.loadSlidBallTexturePressed(pressed, texType);
        this.loadSlidBallTextureDisabled(disabled, texType);
    },

    /**
     * Loads normal state texture for slider ball.
     * @param {String} normal
     * @param {ccui.Widget.LOCAL_TEXTURE|ccui.Widget.PLIST_TEXTURE} texType
     */
    loadSlidBallTextureNormal: function (normal, texType) {
        if (!normal) {
            return;
        }
        texType = texType || ccui.Widget.LOCAL_TEXTURE;
        this._slidBallNormalTextureFile = normal;
        this._ballNTexType = texType;

        var self = this;
        if (!this._slidBallNormalRenderer._textureLoaded) {
            this._slidBallNormalRenderer.addEventListener("load", function () {
                self.loadSlidBallTextureNormal(self._slidBallNormalTextureFile, self._ballNTexType);
            });
        }

        switch (this._ballNTexType) {
            case ccui.Widget.LOCAL_TEXTURE:
                //SetTexture cannot load resource
                this._slidBallNormalRenderer.initWithFile(normal);
                break;
            case ccui.Widget.PLIST_TEXTURE:
                //SetTexture cannot load resource
                this._slidBallNormalRenderer.initWithSpriteFrameName(normal);
                break;
            default:
                break;
        }
        this._updateChildrenDisplayedRGBA();
        this._findLayout();
    },

    /**
     * Loads selected state texture for slider ball.
     * @param {String} pressed
     * @param {ccui.Widget.LOCAL_TEXTURE|ccui.Widget.PLIST_TEXTURE} texType
     */
    loadSlidBallTexturePressed: function (pressed, texType) {
        if (!pressed) {
            return;
        }
        texType = texType || ccui.Widget.LOCAL_TEXTURE;
        this._slidBallPressedTextureFile = pressed;
        this._ballPTexType = texType;

        var self = this;
        if (!this._slidBallPressedRenderer._textureLoaded) {
            this._slidBallPressedRenderer.addEventListener("load", function () {
                self.loadSlidBallTexturePressed(self._slidBallPressedTextureFile, self._ballPTexType);
            });
        }

        switch (this._ballPTexType) {
            case ccui.Widget.LOCAL_TEXTURE:
                //SetTexture cannot load resource
                this._slidBallPressedRenderer.initWithFile(pressed);
                break;
            case ccui.Widget.PLIST_TEXTURE:
                //SetTexture cannot load resource
                this._slidBallPressedRenderer.initWithSpriteFrameName(pressed);
                break;
            default:
                break;
        }
        this._updateChildrenDisplayedRGBA();
        this._findLayout();
    },

    /**
     * Load dark state texture for slider ball.
     * @param {String} disabled
     * @param {ccui.Widget.LOCAL_TEXTURE|ccui.Widget.PLIST_TEXTURE} texType
     */
    loadSlidBallTextureDisabled: function (disabled, texType) {
        if (!disabled) {
            return;
        }
        texType = texType || ccui.Widget.LOCAL_TEXTURE;
        this._slidBallDisabledTextureFile = disabled;
        this._ballDTexType = texType;

        var self = this;
        if (!this._slidBallDisabledRenderer._textureLoaded) {
            this._slidBallDisabledRenderer.addEventListener("load", function () {
                self.loadSlidBallTextureDisabled(self._slidBallDisabledTextureFile, self._ballDTexType);
            });
        }

        switch (this._ballDTexType) {
            case ccui.Widget.LOCAL_TEXTURE:
                //SetTexture cannot load resource
                this._slidBallDisabledRenderer.initWithFile(disabled);
                break;
            case ccui.Widget.PLIST_TEXTURE:
                //SetTexture cannot load resource
                this._slidBallDisabledRenderer.initWithSpriteFrameName(disabled);
                break;
            default:
                break;
        }
        this._updateChildrenDisplayedRGBA();
        this._findLayout();
    },

    /**
     * Changes the progress direction of slider.
     * @param {number} percent
     */
    setPercent: function (percent) {
        if (percent > 100)
            percent = 100;
        if (percent < 0)
            percent = 0;
        this._percent = percent;
        var res = percent / 100.0;
        var dis = this._barLength * res;
        this._slidBallRenderer.setPosition(dis, this._contentSize.height / 2);
        if (this._scale9Enabled)
            this._progressBarRenderer.setPreferredSize(cc.size(dis, this._contentSize.height));
        else {
            var spriteRenderer = this._progressBarRenderer;
            var rect = spriteRenderer.getTextureRect();
            spriteRenderer.setTextureRect(
                cc.rect(rect.x, rect.y, dis / spriteRenderer._scaleX, rect.height),
                spriteRenderer.isTextureRectRotated()
            );
        }
    },

    /**
     * test the point whether location in loadingBar's bounding box.
     * @override
     * @param {cc.Point} pt
     * @returns {boolean}
     */
    hitTest: function (pt) {
        var nsp = this._slidBallNormalRenderer.convertToNodeSpace(pt);
        var ballSize = this._slidBallNormalRenderer.getContentSize();
        var ballRect = cc.rect(0, 0, ballSize.width, ballSize.height);
        return (nsp.x >= ballRect.x &&
            nsp.x <= (ballRect.x + ballRect.width) &&
            nsp.y >= ballRect.y &&
            nsp.y <= (ballRect.y +ballRect.height));
    },

    onTouchBegan: function (touch, event) {
        var pass = ccui.Widget.prototype.onTouchBegan.call(this, touch, event);
        if (this._hit) {
            var nsp = this.convertToNodeSpace(this._touchBeganPosition);
            this.setPercent(this._getPercentWithBallPos(nsp.x));
            this._percentChangedEvent();
        }
        return pass;
    },

    onTouchMoved: function (touch, event) {
        var touchPoint = touch.getLocation();
        var nsp = this.convertToNodeSpace(touchPoint);
        this.setPercent(this._getPercentWithBallPos(nsp.x));
        this._percentChangedEvent();
    },

    onTouchEnded: function (touch, event) {
        ccui.Widget.prototype.onTouchEnded.call(this, touch, event);
    },

    onTouchCancelled: function (touch, event) {
        ccui.Widget.prototype.onTouchCancelled.call(this, touch, event);
    },

    /**
     * Returns percent with ball's position.
     * @param {cc.Point} px
     * @returns {number}
     */
    _getPercentWithBallPos: function (px) {
        return ((px / this._barLength) * 100);
    },

    /**
     * add event listener
     * @param {Function} selector
     * @param {Object} [target=]
     * @deprecated since v3.0, please use addEventListener instead.
     */
    addEventListenerSlider: function (selector, target) {
        this.addEventListener(selector, target);
    },

    /**
     * Adds a callback
     * @param {Function} selector
     * @param {Object} [target=]
     */
    addEventListener: function (selector, target) {
        this._sliderEventSelector = selector;      //when target is undefined, _sliderEventSelector = _eventCallback
        this._sliderEventListener = target;
    },

    _percentChangedEvent: function () {
        if (this._sliderEventSelector) {
            if (this._sliderEventListener)
                this._sliderEventSelector.call(this._sliderEventListener, this, ccui.Slider.EVENT_PERCENT_CHANGED);
            else
                this._sliderEventSelector(this, ccui.Slider.EVENT_PERCENT_CHANGED);  // _eventCallback
        }
        if (this._ccEventCallback)
            this._ccEventCallback(this, ccui.Slider.EVENT_PERCENT_CHANGED);
    },

    /**
     * Gets the progress direction of slider.
     * @returns {number}
     */
    getPercent: function () {
        return this._percent;
    },

    _onSizeChanged: function () {
        ccui.Widget.prototype._onSizeChanged.call(this);
        this._barRendererAdaptDirty = true;
        this._progressBarRendererDirty = true;
    },

    _adaptRenderers: function () {
        if (this._barRendererAdaptDirty) {
            this._barRendererScaleChangedWithSize();
            this._barRendererAdaptDirty = false;
        }
        if (this._progressBarRendererDirty) {
            this._progressBarRendererScaleChangedWithSize();
            this._progressBarRendererDirty = false;
        }
    },

    /**
     * Returns the content size of bar renderer.
     * @returns {cc.Size}
     */
    getVirtualRendererSize: function () {
        return this._barRenderer.getContentSize();
    },

    /**
     * Returns the bar renderer.
     * @returns {cc.Node}
     */
    getVirtualRenderer: function () {
        return this._barRenderer;
    },

    _barRendererScaleChangedWithSize: function () {
        if (this._unifySize) {
            this._barLength = this._contentSize.width;
            this._barRenderer.setPreferredSize(this._contentSize);
        } else if (this._ignoreSize) {
            this._barRenderer.setScale(1.0);
            this._barLength = this._contentSize.width;
        } else {
            this._barLength = this._contentSize.width;
            if (this._scale9Enabled) {
                this._barRenderer.setPreferredSize(this._contentSize);
                this._barRenderer.setScale(1.0);
            } else {
                var btextureSize = this._barTextureSize;
                if (btextureSize.width <= 0.0 || btextureSize.height <= 0.0) {
                    this._barRenderer.setScale(1.0);
                } else {
                    var bscaleX = this._contentSize.width / btextureSize.width;
                    var bscaleY = this._contentSize.height / btextureSize.height;
                    this._barRenderer.setScaleX(bscaleX);
                    this._barRenderer.setScaleY(bscaleY);
                }
            }
        }
        this._barRenderer.setPosition(this._contentSize.width / 2.0, this._contentSize.height / 2.0);
        this.setPercent(this._percent);
    },

    _progressBarRendererScaleChangedWithSize: function () {
        if (this._unifySize) {
            this._progressBarRenderer.setPreferredSize(this._contentSize);
        } else if (this._ignoreSize) {
            if (!this._scale9Enabled) {
                var ptextureSize = this._progressBarTextureSize;
                var pscaleX = this._contentSize.width / ptextureSize.width;
                var pscaleY = this._contentSize.height / ptextureSize.height;
                this._progressBarRenderer.setScaleX(pscaleX);
                this._progressBarRenderer.setScaleY(pscaleY);
            }
        }
        else {
            if (this._scale9Enabled) {
                this._progressBarRenderer.setPreferredSize(this._contentSize);
                this._progressBarRenderer.setScale(1);
            }
            else {
                var ptextureSize = this._progressBarTextureSize;
                if (ptextureSize.width <= 0.0 || ptextureSize.height <= 0.0) {
                    this._progressBarRenderer.setScale(1.0);
                    return;
                }
                var pscaleX = this._contentSize.width / ptextureSize.width;
                var pscaleY = this._contentSize.height / ptextureSize.height;
                this._progressBarRenderer.setScaleX(pscaleX);
                this._progressBarRenderer.setScaleY(pscaleY);
            }
        }
        this._progressBarRenderer.setPosition(0.0, this._contentSize.height / 2.0);
        this.setPercent(this._percent);
    },

    _onPressStateChangedToNormal: function () {
        this._slidBallNormalRenderer.setVisible(true);
        this._slidBallPressedRenderer.setVisible(false);
        this._slidBallDisabledRenderer.setVisible(false);

        this._slidBallNormalRenderer.setScale(this._sliderBallNormalTextureScaleX, this._sliderBallNormalTextureScaleY);
        if (cc._renderType === cc.game.RENDER_TYPE_WEBGL) {
            this._slidBallNormalRenderer._renderCmd._shaderProgram = this._getNormalGLProgram();
        } else {
            // TODO: add canvas support
        }
    },

    _onPressStateChangedToPressed: function () {
        if (!this._slidBallPressedTextureFile) {
            this._slidBallNormalRenderer.setScale(this._sliderBallNormalTextureScaleX + this._zoomScale, this._sliderBallNormalTextureScaleY + this._zoomScale);
        } else {
            this._slidBallNormalRenderer.setVisible(false);
            this._slidBallPressedRenderer.setVisible(true);
            this._slidBallDisabledRenderer.setVisible(false);
        }
        if (cc._renderType === cc.game.RENDER_TYPE_WEBGL) {
            this._slidBallNormalRenderer._renderCmd._shaderProgram = this._getNormalGLProgram();
        } else {
            // TODO: add canvas support
        }
    },

    _onPressStateChangedToDisabled: function () {
        if (this._slidBallDisabledTextureFile) {
            this._slidBallNormalRenderer.setVisible(false);
            this._slidBallDisabledRenderer.setVisible(true);
        } else {
            this._slidBallNormalRenderer.setVisible(true);
            if (cc._renderType === cc.game.RENDER_TYPE_WEBGL) {
                this._slidBallNormalRenderer._renderCmd._shaderProgram = this._getGrayGLProgram();
            } else {
                // TODO: add canvas support
            }
        }
        this._slidBallNormalRenderer.setScale(this._sliderBallNormalTextureScaleX, this._sliderBallNormalTextureScaleY);
        this._slidBallPressedRenderer.setVisible(false);
    },

    setZoomScale: function (scale) {
        this._zoomScale = scale;
    },

    getZoomScale: function () {
        return this._zoomScale;
    },

    getSlidBallNormalRenderer: function () {
        return this._slidBallNormalRenderer;
    },

    getSlidBallPressedRenderer: function () {
        return this._slidBallPressedRenderer;
    },

    getSlidBallDisabledRenderer: function () {
        return this._slidBallDisabledRenderer;
    },

    getSlidBallRenderer: function () {
        return this._slidBallRenderer;
    },

    /**
     * Returns the "class name" of ccui.LoadingBar.
     * @returns {string}
     */
    getDescription: function () {
        return "Slider";
    },

    _createCloneInstance: function () {
        return new ccui.Slider();
    },

    _copySpecialProperties: function (slider) {
        this._prevIgnoreSize = slider._prevIgnoreSize;
        this.setScale9Enabled(slider._scale9Enabled);
        this.loadBarTexture(slider._textureFile, slider._barTexType);
        this.loadProgressBarTexture(slider._progressBarTextureFile, slider._progressBarTexType);
        this.loadSlidBallTextureNormal(slider._slidBallNormalTextureFile, slider._ballNTexType);
        this.loadSlidBallTexturePressed(slider._slidBallPressedTextureFile, slider._ballPTexType);
        this.loadSlidBallTextureDisabled(slider._slidBallDisabledTextureFile, slider._ballDTexType);
        this.setPercent(slider.getPercent());
        this._sliderEventListener = slider._sliderEventListener;
        this._sliderEventSelector = slider._sliderEventSelector;
        this._zoomScale = slider._zoomScale;
        this._ccEventCallback = slider._ccEventCallback;

    }
});

var _p = ccui.Slider.prototype;

// Extended properties
/** @expose */
_p.percent;
cc.defineGetterSetter(_p, "percent", _p.getPercent, _p.setPercent);

_p = null;

/**
 * allocates and initializes a UISlider.
 * @deprecated since v3.0, please use new ccui.Slider() instead.
 * @return {ccui.Slider}
 */
ccui.Slider.create = function (barTextureName, normalBallTextureName, resType) {
    return new ccui.Slider(barTextureName, normalBallTextureName, resType);
};

// Constant
//Slider event type
/**
 * The percent change event flag of ccui.Slider.
 * @constant
 * @type {number}
 */
ccui.Slider.EVENT_PERCENT_CHANGED = 0;

//Render zorder
/**
 * The zOrder value of ccui.Slider's base bar renderer.
 * @constant
 * @type {number}
 */
ccui.Slider.BASEBAR_RENDERER_ZORDER = -3;
/**
 * The zOrder value of ccui.Slider's progress bar renderer.
 * @constant
 * @type {number}
 */
ccui.Slider.PROGRESSBAR_RENDERER_ZORDER = -2;
/**
 * The zOrder value of ccui.Slider's ball renderer.
 * @constant
 * @type {number}
 */
ccui.Slider.BALL_RENDERER_ZORDER = -1;