# ContentPanels.js

    /**
     * @class Ext.ContentPanel
     * @extends Ext.util.Observable
     * A basic ContentPanel element.
     * @cfg {Boolean} fitToFrame True for this panel to adjust its size to fit when the region resizes  (defaults to false)
     * @cfg {Boolean} fitContainer When using {@link #fitToFrame} and {@link #resizeEl}, you can also fit the parent container  (defaults to false)
     * @cfg {Boolean/Object} autoCreate True to auto generate the DOM element for this panel, or a {@link Ext.DomHelper} config of the element to create
     * @cfg {Boolean} closable True if the panel can be closed/removed
     * @cfg {Boolean} background True if the panel should not be activated when it is added (defaults to false)
     * @cfg {String/HTMLElement/Element} resizeEl An element to resize if {@link #fitToFrame} is true (instead of this panel's element)
     * @cfg {Toolbar} toolbar A toolbar for this panel
     * @cfg {Boolean} autoScroll True to scroll overflow in this panel (use with {@link #fitToFrame})
     * @cfg {String} title The title for this panel
     * @cfg {Array} adjustments Values to <b>add</b> to the width/height when doing a {@link #fitToFrame} (default is [0, 0])
     * @cfg {String} url Calls {@link #setUrl} with this value
     * @cfg {String/Object} params When used with {@link #url}, calls {@link #setUrl} with this value
     * @cfg {Boolean} loadOnce When used with {@link #url}, calls {@link #setUrl} with this value
     * @constructor
     * Create a new ContentPanel.
     * @param {String/HTMLElement/Ext.Element} el The container element for this panel
     * @param {String/Object} config A string to set only the title or a config object
     * @param {String} content (optional) Set the HTML content for this panel
     */
    Ext.ContentPanel = function(el, config, content){
        if(el.autoCreate){
            config = el;
            el = Ext.id();
        }
        this.el = Ext.get(el);
        if(!this.el && config && config.autoCreate){
            if(typeof config.autoCreate == "object"){
                if(!config.autoCreate.id){
                    config.autoCreate.id = config.id||el;
                }
                this.el = Ext.DomHelper.append(document.body,
                            config.autoCreate, true);
            }else{
                this.el = Ext.DomHelper.append(document.body,
                            {tag: "div", cls: "x-layout-inactive-content", id: config.id||el}, true);
            }
        }
        this.closable = false;
        this.loaded = false;
        this.active = false;
        if(typeof config == "string"){
            this.title = config;
        }else{
            Ext.apply(this, config);
        }
        if(this.resizeEl){
            this.resizeEl = Ext.get(this.resizeEl, true);
        }else{
            this.resizeEl = this.el;
        }
        this.addEvents({
            /**
             * @event activate
             * Fires when this panel is activated.
             * @param {Ext.ContentPanel} this
             */
            "activate" : true,
            /**
             * @event deactivate
             * Fires when this panel is activated.
             * @param {Ext.ContentPanel} this
             */
            "deactivate" : true,

            /**
             * @event resize
             * Fires when this panel is resized if fitToFrame is true.
             * @param {Ext.ContentPanel} this
             * @param {Number} width The width after any component adjustments
             * @param {Number} height The height after any component adjustments
             */
            "resize" : true
        });
        if(this.autoScroll){
            this.resizeEl.setStyle("overflow", "auto");
        }
        content = content || this.content;
        if(content){
            this.setContent(content);
        }
        if(config && config.url){
            this.setUrl(this.url, this.params, this.loadOnce);
        }
        Ext.ContentPanel.superclass.constructor.call(this);
    };

    Ext.extend(Ext.ContentPanel, Ext.util.Observable, {
        tabTip:'',
        setRegion : function(region){
            this.region = region;
            if(region){
               this.el.replaceClass("x-layout-inactive-content", "x-layout-active-content");
            }else{
               this.el.replaceClass("x-layout-active-content", "x-layout-inactive-content");
            }
        },

        /**
         * Returns the toolbar for this Panel if one was configured.
         * @return {Ext.Toolbar}
         */
        getToolbar : function(){
            return this.toolbar;
        },

        setActiveState : function(active){
            this.active = active;
            if(!active){
                this.fireEvent("deactivate", this);
            }else{
                this.fireEvent("activate", this);
            }
        },
        /**
         * Updates this panel's element
         * @param {String} content The new content
         * @param {Boolean} loadScripts (optional) true to look for and process scripts
        */
        setContent : function(content, loadScripts){
            this.el.update(content, loadScripts);
        },

        ignoreResize : function(w, h){
            if(this.lastSize && this.lastSize.width == w && this.lastSize.height == h){
                return true;
            }else{
                this.lastSize = {width: w, height: h};
                return false;
            }
        },
        /**
         * Get the {@link Ext.UpdateManager} for this panel. Enables you to perform Ajax updates.
         * @return {Ext.UpdateManager} The UpdateManager
         */
        getUpdateManager : function(){
            return this.el.getUpdateManager();
        },
         /**
         * Loads this content panel immediately with content from XHR. Note: to delay loading until the panel is activated, use {@link #setUrl}.
         * @param {Object/String/Function} url The url for this request or a function to call to get the url or a config object containing any of the following options:
    <pre><code>
    panel.load({
        url: "your-url.php",
        params: {param1: "foo", param2: "bar"}, // or a URL encoded string
        callback: yourFunction,
        scope: yourObject, //(optional scope)
        discardUrl: false,
        nocache: false,
        text: "Loading...",
        timeout: 30,
        scripts: false
    });
    </code></pre>
         * The only required property is <i>url</i>. The optional properties <i>nocache</i>, <i>text</i> and <i>scripts</i>
         * are shorthand for <i>disableCaching</i>, <i>indicatorText</i> and <i>loadScripts</i> and are used to set their associated property on this panel UpdateManager instance.
         * @param {String/Object} params (optional) The parameters to pass as either a URL encoded string "param1=1&amp;param2=2" or an object {param1: 1, param2: 2}
         * @param {Function} callback (optional) Callback when transaction is complete -- called with signature (oElement, bSuccess, oResponse)
         * @param {Boolean} discardUrl (optional) By default when you execute an update the defaultUrl is changed to the last used URL. If true, it will not store the URL.
         * @return {Ext.ContentPanel} this
         */
        load : function(){
            var um = this.el.getUpdateManager();
            um.update.apply(um, arguments);
            return this;
        },

        /**
         * Set a URL to be used to load the content for this panel. When this panel is activated, the content will be loaded from that URL.
         * @param {String/Function} url The URL to load the content from or a function to call to get the URL
         * @param {String/Object} params (optional) The string params for the update call or an object of the params. See {@link Ext.UpdateManager#update} for more details. (Defaults to null)
         * @param {Boolean} loadOnce (optional) Whether to only load the content once. If this is false it makes the Ajax call every time this panel is activated. (Defaults to false)
         * @return {Ext.UpdateManager} The UpdateManager
         */
        setUrl : function(url, params, loadOnce){
            if(this.refreshDelegate){
                this.removeListener("activate", this.refreshDelegate);
            }
            this.refreshDelegate = this._handleRefresh.createDelegate(this, [url, params, loadOnce]);
            this.on("activate", this.refreshDelegate);
            return this.el.getUpdateManager();
        },

        _handleRefresh : function(url, params, loadOnce){
            if(!loadOnce || !this.loaded){
                var updater = this.el.getUpdateManager();
                updater.update(url, params, this._setLoaded.createDelegate(this));
            }
        },

        _setLoaded : function(){
            this.loaded = true;
        },

        /**
         * Returns this panel's id
         * @return {String}
         */
        getId : function(){
            return this.el.id;
        },

        /**
         * Returns this panel's element
         * @return {Ext.Element}
         */
        getEl : function(){
            return this.el;
        },

        adjustForComponents : function(width, height){
            if(this.resizeEl != this.el){
                width -= this.el.getFrameWidth('lr');
                height -= this.el.getFrameWidth('tb');
            }
            if(this.toolbar){
                var te = this.toolbar.getEl();
                height -= te.getHeight();
                te.setWidth(width);
            }
            if(this.adjustments){
                width += this.adjustments[0];
                height += this.adjustments[1];
            }
            return {"width": width, "height": height};
        },

        setSize : function(width, height){
            if(this.fitToFrame && !this.ignoreResize(width, height)){
                if(this.fitContainer && this.resizeEl != this.el){
                    this.el.setSize(width, height);
                }
                var size = this.adjustForComponents(width, height);
                this.resizeEl.setSize(this.autoWidth ? "auto" : size.width, this.autoHeight ? "auto" : size.height);
                this.fireEvent('resize', this, size.width, size.height);
            }
        },

        /**
         * Returns this panel's title
         * @return {String}
         */
        getTitle : function(){
            return this.title;
        },

        /**
         * Set this panel's title
         * @param {String} title
         */
        setTitle : function(title){
            this.title = title;
            if(this.region){
                this.region.updatePanelTitle(this, title);
            }
        },

        /**
         * Returns true is this panel was configured to be closable
         * @return {Boolean}
         */
        isClosable : function(){
            return this.closable;
        },

        beforeSlide : function(){
            this.el.clip();
            this.resizeEl.clip();
        },

        afterSlide : function(){
            this.el.unclip();
            this.resizeEl.unclip();
        },

        /**
         *   Force a content refresh from the URL specified in the {@link #setUrl} method.
         *   Will fail silently if the {@link #setUrl} method has not been called.
         *   This does not activate the panel, just updates its content.
         */
        refresh : function(){
            if(this.refreshDelegate){
               this.loaded = false;
               this.refreshDelegate();
            }
        },

        /**
         * Destroys this panel
         */
        destroy : function(){
            this.el.removeAllListeners();
            var tempEl = document.createElement("span");
            tempEl.appendChild(this.el.dom);
            tempEl.innerHTML = "";
            this.el.remove();
            this.el = null;
        }
    });

    /**
     * @class Ext.GridPanel
     * @extends Ext.ContentPanel
     * @constructor
     * Create a new GridPanel.
     * @param {Ext.grid.Grid} grid The grid for this panel
     * @param {String/Object} config A string to set only the panel's title, or a config object
     */
    Ext.GridPanel = function(grid, config){
        this.wrapper = Ext.DomHelper.append(document.body, // wrapper for IE7 strict & safari scroll issue
            {tag: "div", cls: "x-layout-grid-wrapper x-layout-inactive-content"}, true);
        this.wrapper.dom.appendChild(grid.getGridEl().dom);
        Ext.GridPanel.superclass.constructor.call(this, this.wrapper, config);
        if(this.toolbar){
            this.toolbar.el.insertBefore(this.wrapper.dom.firstChild);
        }
        grid.monitorWindowResize = false; // turn off autosizing
        grid.autoHeight = false;
        grid.autoWidth = false;
        this.grid = grid;
        this.grid.getGridEl().replaceClass("x-layout-inactive-content", "x-layout-component-panel");
    };

    Ext.extend(Ext.GridPanel, Ext.ContentPanel, {
        getId : function(){
            return this.grid.id;
        },

        /**
         * Returns the grid for this panel
         * @return {Ext.grid.Grid}
         */
        getGrid : function(){
            return this.grid;
        },

        setSize : function(width, height){
            if(!this.ignoreResize(width, height)){
                var grid = this.grid;
                var size = this.adjustForComponents(width, height);
                grid.getGridEl().setSize(size.width, size.height);
                grid.autoSize();
            }
        },

        beforeSlide : function(){
            this.grid.getView().scroller.clip();
        },

        afterSlide : function(){
            this.grid.getView().scroller.unclip();
        },

        destroy : function(){
            this.grid.destroy();
            delete this.grid;
            Ext.GridPanel.superclass.destroy.call(this);
        }
    });

    /**
     * @class Ext.NestedLayoutPanel
     * @extends Ext.ContentPanel
     * @constructor
     * Create a new NestedLayoutPanel.
     * @param {Ext.BorderLayout} layout The layout for this panel
     * @param {String/Object} config A string to set only the title or a config object
     */
    Ext.NestedLayoutPanel = function(layout, config){
        Ext.NestedLayoutPanel.superclass.constructor.call(this, layout.getEl(), config);
        layout.monitorWindowResize = false; // turn off autosizing
        this.layout = layout;
        this.layout.getEl().addClass("x-layout-nested-layout");
    };

    Ext.extend(Ext.NestedLayoutPanel, Ext.ContentPanel, {

        setSize : function(width, height){
            if(!this.ignoreResize(width, height)){
                var size = this.adjustForComponents(width, height);
                var el = this.layout.getEl();
                el.setSize(size.width, size.height);
                var touch = el.dom.offsetWidth;
                this.layout.layout();
                // ie requires a double layout on the first pass
                if(Ext.isIE && !this.initialized){
                    this.initialized = true;
                    this.layout.layout();
                }
            }
        },

        /**
         * Returns the nested BorderLayout for this panel
         * @return {Ext.BorderLayout}
         */
        getLayout : function(){
            return this.layout;
        }
    });

    Ext.ScrollPanel = function(el, config, content){
        config = config || {};
        config.fitToFrame = true;
        Ext.ScrollPanel.superclass.constructor.call(this, el, config, content);

        this.el.dom.style.overflow = "hidden";
        var wrap = this.el.wrap({cls: "x-scroller x-layout-inactive-content"});
        this.el.removeClass("x-layout-inactive-content");
        this.el.on("mousewheel", this.onWheel, this);

        var up = wrap.createChild({cls: "x-scroller-up", html: "&#160;"}, this.el.dom);
        var down = wrap.createChild({cls: "x-scroller-down", html: "&#160;"});
        up.unselectable(); down.unselectable();
        up.on("click", this.scrollUp, this);
        down.on("click", this.scrollDown, this);
        up.addClassOnOver("x-scroller-btn-over");
        down.addClassOnOver("x-scroller-btn-over");
        up.addClassOnClick("x-scroller-btn-click");
        down.addClassOnClick("x-scroller-btn-click");
        this.adjustments = [0, -(up.getHeight() + down.getHeight())];

        this.resizeEl = this.el;
        this.el = wrap; this.up = up; this.down = down;
    };

    Ext.extend(Ext.ScrollPanel, Ext.ContentPanel, {
        increment : 100,
        wheelIncrement : 5,
        scrollUp : function(){
            this.resizeEl.scroll("up", this.increment, {callback: this.afterScroll, scope: this});
        },

        scrollDown : function(){
            this.resizeEl.scroll("down", this.increment, {callback: this.afterScroll, scope: this});
        },

        afterScroll : function(){
            var el = this.resizeEl;
            var t = el.dom.scrollTop, h = el.dom.scrollHeight, ch = el.dom.clientHeight;
            this.up[t == 0 ? "addClass" : "removeClass"]("x-scroller-btn-disabled");
            this.down[h - t <= ch ? "addClass" : "removeClass"]("x-scroller-btn-disabled");
        },

        setSize : function(){
            Ext.ScrollPanel.superclass.setSize.apply(this, arguments);
            this.afterScroll();
        },

        onWheel : function(e){
            var d = e.getWheelDelta();
            this.resizeEl.dom.scrollTop -= (d*this.wheelIncrement);
            this.afterScroll();
            e.stopEvent();
        },

        setContent : function(content, loadScripts){
            this.resizeEl.update(content, loadScripts);
        }

    });

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