contentpanels.js

web2.0完美实现框架

/*
 * Ext JS Library 2.0.2
 * Copyright(c) 2006-2008, Ext JS, LLC.
 * [e-mail]
 * 
 * http://extjs.com/license
 */

/**
 * @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 {Mixed} 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 {Mixed} 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.Updater} for this panel. Enables you to perform Ajax updates.
     * @return {Ext.Updater} The Updater
     */
    getUpdater : function(){
        return this.el.getUpdater();
    },
     /**
     * 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 Updater 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(){
        this.el.load.apply(this.el, 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.Updater#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.Updater} The Updater
     */
    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.getUpdater();
    },
    
    _handleRefresh : function(url, params, loadOnce){
        if(!loadOnce || !this.loaded){
            var updater = this.el.getUpdater();
            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};
    },