/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-04-03 15:07:25
*/
/**
 * @class Ext.grid.Column
 * <p>This class encapsulates column configuration data to be used in the initialization of a
 * {@link Ext.grid.ColumnModel ColumnModel}.</p>
 * <p>While subclasses are provided to render data in different ways, this class renders a passed
 * data field unchanged and is usually used for textual columns.</p>
 */
Ext.grid.Column = Ext.extend(Ext.util.Observable, {
    /**
     * @cfg {Boolean} editable Optional. Defaults to <tt>true</tt>, enabling the configured
     * <tt>{@link #editor}</tt>.  Set to <tt>false</tt> to initially disable editing on this column.
     * The initial configuration may be dynamically altered using
     * {@link Ext.grid.ColumnModel}.{@link Ext.grid.ColumnModel#setEditable setEditable()}.
     */
    /**
     * @cfg {String} id Optional. A name which identifies this column (defaults to the column's initial
     * ordinal position.) The <tt>id</tt> is used to create a CSS <b>class</b> name which is applied to all
     * table cells (including headers) in that column (in this context the <tt>id</tt> does not need to be
     * unique). The class name takes the form of <pre>x-grid3-td-<b>id</b></pre>
     * Header cells will also receive this class name, but will also have the class <pre>x-grid3-hd</pre>
     * So, to target header cells, use CSS selectors such as:<pre>.x-grid3-hd-row .x-grid3-td-<b>id</b></pre>
     * The {@link Ext.grid.GridPanel#autoExpandColumn} grid config option references the column via this
     * unique identifier.
     */
    /**
     * @cfg {String} header Optional. The header text to be used as innerHTML
     * (html tags are accepted) to display in the Grid view.  <b>Note</b>: to
     * have a clickable header with no text displayed use <tt>'&amp;#160;'</tt>.
     */
    /**
     * @cfg {Boolean} groupable Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to disable the header menu item to group by the column selected. Defaults to <tt>true</tt>,
     * which enables the header menu group option.  Set to <tt>false</tt> to disable (but still show) the
     * group option in the header menu for the column. See also <code>{@link #groupName}</code>.
     */
    /**
     * @cfg {String} groupName Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to specify the text with which to prefix the group field value in the group header line.
     * See also {@link #groupRenderer} and
     * {@link Ext.grid.GroupingView}.{@link Ext.grid.GroupingView#showGroupName showGroupName}.
     */
    /**
     * @cfg {Function} groupRenderer <p>Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to specify the function used to format the grouping field value for display in the group
     * {@link #groupName header}.  If a <tt><b>groupRenderer</b></tt> is not specified, the configured
     * <tt><b>{@link #renderer}</b></tt> will be called; if a <tt><b>{@link #renderer}</b></tt> is also not specified
     * the new value of the group field will be used.</p>
     * <p>The called function (either the <tt><b>groupRenderer</b></tt> or <tt><b>{@link #renderer}</b></tt>) will be
     * passed the following parameters:
     * <div class="mdetail-params"><ul>
     * <li><b>v</b> : Object<p class="sub-desc">The new value of the group field.</p></li>
     * <li><b>unused</b> : undefined<p class="sub-desc">Unused parameter.</p></li>
     * <li><b>r</b> : Ext.data.Record<p class="sub-desc">The Record providing the data
     * for the row which caused group change.</p></li>
     * <li><b>rowIndex</b> : Number<p class="sub-desc">The row index of the Record which caused group change.</p></li>
     * <li><b>colIndex</b> : Number<p class="sub-desc">The column index of the group field.</p></li>
     * <li><b>ds</b> : Ext.data.Store<p class="sub-desc">The Store which is providing the data Model.</p></li>
     * </ul></div></p>
     * <p>The function should return a string value.</p>
     */
    /**
     * @cfg {String} emptyGroupText Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to specify the text to display when there is an empty group value. Defaults to the
     * {@link Ext.grid.GroupingView}.{@link Ext.grid.GroupingView#emptyGroupText emptyGroupText}.
     */
    /**
     * @cfg {String} dataIndex <p><b>Required</b>. The name of the field in the
     * grid's {@link Ext.data.Store}'s {@link Ext.data.Record} definition from
     * which to draw the column's value.</p>
     */
    /**
     * @cfg {Number} width
     * Optional. The initial width in pixels of the column.
     * The width of each column can also be affected if any of the following are configured:
     * <div class="mdetail-params"><ul>
     * <li>{@link Ext.grid.GridPanel}.<tt>{@link Ext.grid.GridPanel#autoExpandColumn autoExpandColumn}</tt></li>
     * <li>{@link Ext.grid.GridView}.<tt>{@link Ext.grid.GridView#forceFit forceFit}</tt>
     * <div class="sub-desc">
     * <p>By specifying <tt>forceFit:true</tt>, {@link #fixed non-fixed width} columns will be
     * re-proportioned (based on the relative initial widths) to fill the width of the grid so
     * that no horizontal scrollbar is shown.</p>
     * </div></li>
     * <li>{@link Ext.grid.GridView}.<tt>{@link Ext.grid.GridView#autoFill autoFill}</tt></li>
     * <li>{@link Ext.grid.GridPanel}.<tt>{@link Ext.grid.GridPanel#minColumnWidth minColumnWidth}</tt></li>
     * <br><p><b>Note</b>: when the width of each column is determined, a space on the right side
     * is reserved for the vertical scrollbar.  The
     * {@link Ext.grid.GridView}.<tt>{@link Ext.grid.GridView#scrollOffset scrollOffset}</tt>
     * can be modified to reduce or eliminate the reserved offset.</p>
     */
    /**
     * @cfg {Boolean} sortable Optional. <tt>true</tt> if sorting is to be allowed on this column.
     * Defaults to the value of the <code>{@link Ext.grid.ColumnModel#defaultSortable}</code> property.
     * Whether local/remote sorting is used is specified in <code>{@link Ext.data.Store#remoteSort}</code>.
     */
    /**
     * @cfg {Boolean} fixed Optional. <tt>true</tt> if the column width cannot be changed.  Defaults to <tt>false</tt>.
     */
    /**
     * @cfg {Boolean} resizable Optional. <tt>false</tt> to disable column resizing. Defaults to <tt>true</tt>.
     */
    /**
     * @cfg {Boolean} menuDisabled Optional. <tt>true</tt> to disable the column menu. Defaults to <tt>false</tt>.
     */
    /**
     * @cfg {Boolean} hidden
     * Optional. <tt>true</tt> to initially hide this column. Defaults to <tt>false</tt>.
     * A hidden column {@link Ext.grid.GridPanel#enableColumnHide may be shown via the header row menu}.
     * If a column is never to be shown, simply do not include this column in the Column Model at all.
     */
    /**
     * @cfg {String} tooltip Optional. A text string to use as the column header's tooltip.  If Quicktips
     * are enabled, this value will be used as the text of the quick tip, otherwise it will be set as the
     * header's HTML title attribute. Defaults to ''.
     */
    /**
     * @cfg {Mixed} renderer
     * <p>For an alternative to specifying a renderer see <code>{@link #xtype}</code></p>
     * <p>Optional. A renderer is an 'interceptor' method which can be used transform data (value,
     * appearance, etc.) before it is rendered). This may be specified in either of three ways:
     * <div class="mdetail-params"><ul>
     * <li>A renderer function used to return HTML markup for a cell given the cell's data value.</li>
     * <li>A string which references a property name of the {@link Ext.util.Format} class which
     * provides a renderer function.</li>
     * <li>An object specifying both the renderer function, and its execution scope (<tt><b>this</b></tt>
     * reference) e.g.:<pre style="margin-left:1.2em"><code>
{
    fn: this.gridRenderer,
    scope: this
}
</code></pre></li></ul></div>
     * If not specified, the default renderer uses the raw data value.</p>
     * <p>For information about the renderer function (passed parameters, etc.), see
     * {@link Ext.grid.ColumnModel#setRenderer}. An example of specifying renderer function inline:</p><pre><code>
var companyColumn = {
   header: 'Company Name',
   dataIndex: 'company',
   renderer: function(value, metaData, record, rowIndex, colIndex, store) {
      // provide the logic depending on business rules
      // name of your own choosing to manipulate the cell depending upon
      // the data in the underlying Record object.
      if (value == 'whatever') {
          //metaData.css : String : A CSS class name to add to the TD element of the cell.
          //metaData.attr : String : An html attribute definition string to apply to
          //                         the data container element within the table
          //                         cell (e.g. 'style="color:red;"').
          metaData.css = 'name-of-css-class-you-will-define';
      }
      return value;
   }
}
     * </code></pre>
     * See also {@link #scope}.
     */
    /**
     * @cfg {String} xtype Optional. A String which references a predefined {@link Ext.grid.Column} subclass
     * type which is preconfigured with an appropriate <code>{@link #renderer}</code> to be easily
     * configured into a ColumnModel. The predefined {@link Ext.grid.Column} subclass types are:
     * <div class="mdetail-params"><ul>
     * <li><b><tt>gridcolumn</tt></b> : {@link Ext.grid.Column} (<b>Default</b>)<p class="sub-desc"></p></li>
     * <li><b><tt>booleancolumn</tt></b> : {@link Ext.grid.BooleanColumn}<p class="sub-desc"></p></li>
     * <li><b><tt>numbercolumn</tt></b> : {@link Ext.grid.NumberColumn}<p class="sub-desc"></p></li>
     * <li><b><tt>datecolumn</tt></b> : {@link Ext.grid.DateColumn}<p class="sub-desc"></p></li>
     * <li><b><tt>templatecolumn</tt></b> : {@link Ext.grid.TemplateColumn}<p class="sub-desc"></p></li>
     * </ul></div>
     * <p>Configuration properties for the specified <code>xtype</code> may be specified with
     * the Column configuration properties, for example:</p>
     * <pre><code>
var grid = new Ext.grid.GridPanel({
    ...
    columns: [{
        header: 'Last Updated',
        dataIndex: 'lastChange',
        width: 85,
        sortable: true,
        //renderer: Ext.util.Format.dateRenderer('m/d/Y'),
        xtype: 'datecolumn', // use xtype instead of renderer
        format: 'M/d/Y' // configuration property for {@link Ext.grid.DateColumn}
    }, {
        ...
    }]
});
     * </code></pre>
     */
    /**
     * @cfg {Object} scope Optional. The scope (<tt><b>this</b></tt> reference) in which to execute the
     * renderer.  Defaults to the Column configuration object.
     */
    /**
     * @cfg {String} align Optional. Set the CSS text-align property of the column.  Defaults to undefined.
     */
    /**
     * @cfg {String} css Optional. An inline style definition string which is applied to all table cells in the column
     * (excluding headers). Defaults to undefined.
     */
    /**
     * @cfg {Boolean} hideable Optional. Specify as <tt>false</tt> to prevent the user from hiding this column
     * (defaults to true).  To disallow column hiding globally for all columns in the grid, use
     * {@link Ext.grid.GridPanel#enableColumnHide} instead.
     */
    /**
     * @cfg {Ext.form.Field} editor Optional. The {@link Ext.form.Field} to use when editing values in this column
     * if editing is supported by the grid. See <tt>{@link #editable}</tt> also.
     */

    /**
     * @private
     * @cfg {Boolean} isColumn
     * Used by ColumnModel setConfig method to avoid reprocessing a Column
     * if <code>isColumn</code> is not set ColumnModel will recreate a new Ext.grid.Column
     * Defaults to true.
     */
    isColumn : true,

    constructor : function(config){
        Ext.apply(this, config);

        if(Ext.isString(this.renderer)){
            this.renderer = Ext.util.Format[this.renderer];
        }else if(Ext.isObject(this.renderer)){
            this.scope = this.renderer.scope;
            this.renderer = this.renderer.fn;
        }
        if(!this.scope){
            this.scope = this;
        }

        var ed = this.editor;
        delete this.editor;
        this.setEditor(ed);
        this.addEvents(
            /**
             * @event click
             * Fires when this Column is clicked.
             * @param {Column} this
             * @param {Grid} The owning GridPanel
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'click',
            /**
             * @event contextmenu
             * Fires when this Column is right clicked.
             * @param {Column} this
             * @param {Grid} The owning GridPanel
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'contextmenu',
            /**
             * @event dblclick
             * Fires when this Column is double clicked.
             * @param {Column} this
             * @param {Grid} The owning GridPanel
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'dblclick',
            /**
             * @event mousedown
             * Fires when this Column receives a mousedown event.
             * @param {Column} this
             * @param {Grid} The owning GridPanel
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'mousedown'
        );
        Ext.grid.Column.superclass.constructor.call(this);
    },

    /**
     * @private
     * Process and refire events routed from the GridView's processEvent method.
     * Returns the event handler's status to allow cancelling of GridView's bubbling process.
     */
    processEvent : function(name, e, grid, rowIndex, colIndex){
        return this.fireEvent(name, this, grid, rowIndex, e);
    },

    /**
     * @private
     * Clean up. Remove any Editor. Remove any listeners.
     */
    destroy: function() {
        if(this.setEditor){
            this.setEditor(null);
        }
        this.purgeListeners();
    },

    /**
     * Optional. A function which returns displayable data when passed the following parameters:
     * <div class="mdetail-params"><ul>
     * <li><b>value</b> : Object<p class="sub-desc">The data value for the cell.</p></li>
     * <li><b>metadata</b> : Object<p class="sub-desc">An object in which you may set the following attributes:<ul>
     * <li><b>css</b> : String<p class="sub-desc">A CSS class name to add to the cell's TD element.</p></li>
     * <li><b>attr</b> : String<p class="sub-desc">An HTML attribute definition string to apply to the data container
     * element <i>within</i> the table cell (e.g. 'style="color:red;"').</p></li></ul></p></li>
     * <li><b>record</b> : Ext.data.record<p class="sub-desc">The {@link Ext.data.Record} from which the data was
     * extracted.</p></li>
     * <li><b>rowIndex</b> : Number<p class="sub-desc">Row index</p></li>
     * <li><b>colIndex</b> : Number<p class="sub-desc">Column index</p></li>
     * <li><b>store</b> : Ext.data.Store<p class="sub-desc">The {@link Ext.data.Store} object from which the Record
     * was extracted.</p></li>
     * </ul></div>
     * @property renderer
     * @type Function
     */
    renderer : function(value){
        return value;
    },

    // private
    getEditor: function(rowIndex){
        return this.editable !== false ? this.editor : null;
    },

    /**
     * Sets a new editor for this column.
     * @param {Ext.Editor/Ext.form.Field} editor The editor to set
     */
    setEditor : function(editor){
        var ed = this.editor;
        if(ed){
            if(ed.gridEditor){
                ed.gridEditor.destroy();
                delete ed.gridEditor;
            }else{
                ed.destroy();
            }
        }
        this.editor = null;
        if(editor){
            //not an instance, create it
            if(!editor.isXType){
                editor = Ext.create(editor, 'textfield');
            }
            this.editor = editor;
        }
    },

    /**
     * Returns the {@link Ext.Editor editor} defined for this column that was created to wrap the {@link Ext.form.Field Field}
     * used to edit the cell.
     * @param {Number} rowIndex The row index
     * @return {Ext.Editor}
     */
    getCellEditor: function(rowIndex){
        var ed = this.getEditor(rowIndex);
        if(ed){
            if(!ed.startEdit){
                if(!ed.gridEditor){
                    ed.gridEditor = new Ext.grid.GridEditor(ed);
                }
                ed = ed.gridEditor;
            }
        }
        return ed;
    }
});

/**
 * @class Ext.grid.BooleanColumn
 * @extends Ext.grid.Column
 * <p>A Column definition class which renders boolean data fields.  See the {@link Ext.grid.Column#xtype xtype}
 * config option of {@link Ext.grid.Column} for more details.</p>
 */
Ext.grid.BooleanColumn = Ext.extend(Ext.grid.Column, {
    /**
     * @cfg {String} trueText
     * The string returned by the renderer when the column value is not falsy (defaults to <tt>'true'</tt>).
     */
    trueText: 'true',
    /**
     * @cfg {String} falseText
     * The string returned by the renderer when the column value is falsy (but not undefined) (defaults to
     * <tt>'false'</tt>).
     */
    falseText: 'false',
    /**
     * @cfg {String} undefinedText
     * The string returned by the renderer when the column value is undefined (defaults to <tt>'&amp;#160;'</tt>).
     */
    undefinedText: '&#160;',

    constructor: function(cfg){
        Ext.grid.BooleanColumn.superclass.constructor.call(this, cfg);
        var t = this.trueText, f = this.falseText, u = this.undefinedText;
        this.renderer = function(v){
            if(v === undefined){
                return u;
            }
            if(!v || v === 'false'){
                return f;
            }
            return t;
        };
    }
});

/**
 * @class Ext.grid.NumberColumn
 * @extends Ext.grid.Column
 * <p>A Column definition class which renders a numeric data field according to a {@link #format} string.  See the
 * {@link Ext.grid.Column#xtype xtype} config option of {@link Ext.grid.Column} for more details.</p>
 */
Ext.grid.NumberColumn = Ext.extend(Ext.grid.Column, {
    /**
     * @cfg {String} format
     * A formatting string as used by {@link Ext.util.Format#number} to format a numeric value for this Column
     * (defaults to <tt>'0,000.00'</tt>).
     */
    format : '0,000.00',
    constructor: function(cfg){
        Ext.grid.NumberColumn.superclass.constructor.call(this, cfg);
        this.renderer = Ext.util.Format.numberRenderer(this.format);
    }
});

/**
 * @class Ext.grid.DateColumn
 * @extends Ext.grid.Column
 * <p>A Column definition class which renders a passed date according to the default locale, or a configured
 * {@link #format}. See the {@link Ext.grid.Column#xtype xtype} config option of {@link Ext.grid.Column}
 * for more details.</p>
 */
Ext.grid.DateColumn = Ext.extend(Ext.grid.Column, {
    /**
     * @cfg {String} format
     * A formatting string as used by {@link Date#format} to format a Date for this Column
     * (defaults to <tt>'m/d/Y'</tt>).
     */
    format : 'm/d/Y',
    constructor: function(cfg){
        Ext.grid.DateColumn.superclass.constructor.call(this, cfg);
        this.renderer = Ext.util.Format.dateRenderer(this.format);
    }
});

/**
 * @class Ext.grid.TemplateColumn
 * @extends Ext.grid.Column
 * <p>A Column definition class which renders a value by processing a {@link Ext.data.Record Record}'s
 * {@link Ext.data.Record#data data} using a {@link #tpl configured} {@link Ext.XTemplate XTemplate}.
 * See the {@link Ext.grid.Column#xtype xtype} config option of {@link Ext.grid.Column} for more
 * details.</p>
 */
Ext.grid.TemplateColumn = Ext.extend(Ext.grid.Column, {
    /**
     * @cfg {String/XTemplate} tpl
     * An {@link Ext.XTemplate XTemplate}, or an XTemplate <i>definition string</i> to use to process a
     * {@link Ext.data.Record Record}'s {@link Ext.data.Record#data data} to produce a column's rendered value.
     */
    constructor: function(cfg){
        Ext.grid.TemplateColumn.superclass.constructor.call(this, cfg);
        var tpl = (!Ext.isPrimitive(this.tpl) && this.tpl.compile) ? this.tpl : new Ext.XTemplate(this.tpl);
        this.renderer = function(value, p, r){
            return tpl.apply(r.data);
        };
        this.tpl = tpl;
    }
});

/**
 * @class Ext.grid.ActionColumn
 * @extends Ext.grid.Column
 * <p>A Grid column type which renders an icon, or a series of icons in a grid cell, and offers a scoped click
 * handler for each icon. Example usage:</p>
<pre><code>
new Ext.grid.GridPanel({
    store: myStore,
    columns: [
        {
            xtype: 'actioncolumn',
            width: 50,
            items: [
                {
                    icon   : 'sell.gif',                // Use a URL in the icon config
                    tooltip: 'Sell stock',
                    handler: function(grid, rowIndex, colIndex) {
                        var rec = store.getAt(rowIndex);
                        alert("Sell " + rec.get('company'));
                    }
                },
                {
                    getClass: function(v, meta, rec) {  // Or return a class from a function
                        if (rec.get('change') < 0) {
                            this.items[1].tooltip = 'Do not buy!';
                            return 'alert-col';
                        } else {
                            this.items[1].tooltip = 'Buy stock';
                            return 'buy-col';
                        }
                    },
                    handler: function(grid, rowIndex, colIndex) {
                        var rec = store.getAt(rowIndex);
                        alert("Buy " + rec.get('company'));
                    }
                }
            ]
        }
        //any other columns here
    ]
});
</pre></code>
 * <p>The action column can be at any index in the columns array, and a grid can have any number of
 * action columns. </p>
 */
Ext.grid.ActionColumn = Ext.extend(Ext.grid.Column, {
    /**
     * @cfg {String} icon
     * The URL of an image to display as the clickable element in the column. 
     * Optional - defaults to <code>{@link Ext#BLANK_IMAGE_URL Ext.BLANK_IMAGE_URL}</code>.
     */
    /**
     * @cfg {String} iconCls
     * A CSS class to apply to the icon image. To determine the class dynamically, configure the Column with a <code>{@link #getClass}</code> function.
     */
    /**
     * @cfg {Function} handler A function called when the icon is clicked.
     * The handler is passed the following parameters:<div class="mdetail-params"><ul>
     * <li><code>grid</code> : GridPanel<div class="sub-desc">The owning GridPanel.</div></li>
     * <li><code>rowIndex</code> : Number<div class="sub-desc">The row index clicked on.</div></li>
     * <li><code>colIndex</code> : Number<div class="sub-desc">The column index clicked on.</div></li>
     * <li><code>item</code> : Object<div class="sub-desc">The clicked item (or this Column if multiple 
     * {@link #items} were not configured).</div></li>
     * <li><code>e</code> : Event<div class="sub-desc">The click event.</div></li>
     * </ul></div>
     */
    /**
     * @cfg {Object} scope The scope (<tt><b>this</b></tt> reference) in which the <code>{@link #handler}</code>
     * and <code>{@link #getClass}</code> fuctions are executed. Defaults to this Column.
     */
    /**
     * @cfg {String} tooltip A tooltip message to be displayed on hover. {@link Ext.QuickTips#init Ext.QuickTips} must have 
     * been initialized.
     */
    /**
     * @cfg {Boolean} stopSelection Defaults to <code>true</code>. Prevent grid <i>row</i> selection upon mousedown.
     */
    /**
     * @cfg {Function} getClass A function which returns the CSS class to apply to the icon image.
     * The function is passed the following parameters:<div class="mdetail-params"><ul>
     *     <li><b>v</b> : Object<p class="sub-desc">The value of the column's configured field (if any).</p></li>
     *     <li><b>metadata</b> : Object<p class="sub-desc">An object in which you may set the following attributes:<ul>
     *         <li><b>css</b> : String<p class="sub-desc">A CSS class name to add to the cell's TD element.</p></li>
     *         <li><b>attr</b> : String<p class="sub-desc">An HTML attribute definition string to apply to the data container element <i>within</i> the table cell
     *         (e.g. 'style="color:red;"').</p></li>
     *     </ul></p></li>
     *     <li><b>r</b> : Ext.data.Record<p class="sub-desc">The Record providing the data.</p></li>
     *     <li><b>rowIndex</b> : Number<p class="sub-desc">The row index..</p></li>
     *     <li><b>colIndex</b> : Number<p class="sub-desc">The column index.</p></li>
     *     <li><b>store</b> : Ext.data.Store<p class="sub-desc">The Store which is providing the data Model.</p></li>
     * </ul></div>
     */
    /**
     * @cfg {Array} items An Array which may contain multiple icon definitions, each element of which may contain:
     * <div class="mdetail-params"><ul>
     * <li><code>icon</code> : String<div class="sub-desc">The url of an image to display as the clickable element 
     * in the column.</div></li>
     * <li><code>iconCls</code> : String<div class="sub-desc">A CSS class to apply to the icon image.
     * To determine the class dynamically, configure the item with a <code>getClass</code> function.</div></li>
     * <li><code>getClass</code> : Function<div class="sub-desc">A function which returns the CSS class to apply to the icon image.
     * The function is passed the following parameters:<ul>
     *     <li><b>v</b> : Object<p class="sub-desc">The value of the column's configured field (if any).</p></li>
     *     <li><b>metadata</b> : Object<p class="sub-desc">An object in which you may set the following attributes:<ul>
     *         <li><b>css</b> : String<p class="sub-desc">A CSS class name to add to the cell's TD element.</p></li>
     *         <li><b>attr</b> : String<p class="sub-desc">An HTML attribute definition string to apply to the data container element <i>within</i> the table cell
     *         (e.g. 'style="color:red;"').</p></li>
     *     </ul></p></li>
     *     <li><b>r</b> : Ext.data.Record<p class="sub-desc">The Record providing the data.</p></li>
     *     <li><b>rowIndex</b> : Number<p class="sub-desc">The row index..</p></li>
     *     <li><b>colIndex</b> : Number<p class="sub-desc">The column index.</p></li>
     *     <li><b>store</b> : Ext.data.Store<p class="sub-desc">The Store which is providing the data Model.</p></li>
     * </ul></div></li>
     * <li><code>handler</code> : Function<div class="sub-desc">A function called when the icon is clicked.</div></li>
     * <li><code>scope</code> : Scope<div class="sub-desc">The scope (<code><b>this</b></code> reference) in which the 
     * <code>handler</code> and <code>getClass</code> functions are executed. Fallback defaults are this Column's
     * configured scope, then this Column.</div></li>
     * <li><code>tooltip</code> : String<div class="sub-desc">A tooltip message to be displayed on hover. 
     * {@link Ext.QuickTips#init Ext.QuickTips} must have been initialized.</div></li>
     * </ul></div>
     */
    header: '&#160;',

    actionIdRe: /x-action-col-(\d+)/,
    
    /**
     * @cfg {String} altText The alt text to use for the image element. Defaults to <tt>''</tt>.
     */
    altText: '',

    constructor: function(cfg) {
        var me = this,
            items = cfg.items || (me.items = [me]),
            l = items.length,
            i,
            item;

        Ext.grid.ActionColumn.superclass.constructor.call(me, cfg);

//      Renderer closure iterates through items creating an <img> element for each and tagging with an identifying 
//      class name x-action-col-{n}
        me.renderer = function(v, meta) {
//          Allow a configured renderer to create initial value (And set the other values in the "metadata" argument!)
            v = Ext.isFunction(cfg.renderer) ? cfg.renderer.apply(this, arguments)||'' : '';

            meta.css += ' x-action-col-cell';
            for (i = 0; i < l; i++) {
                item = items[i];
                v += '<img alt="' + (item.altText || me.altText) + '" src="' + (item.icon || Ext.BLANK_IMAGE_URL) +
                    '" class="x-action-col-icon x-action-col-' + String(i) + ' ' + (item.iconCls || '') +
                    ' ' + (Ext.isFunction(item.getClass) ? item.getClass.apply(item.scope||this.scope||this, arguments) : '') + '"' +
                    ((item.tooltip) ? ' ext:qtip="' + item.tooltip + '"' : '') + ' />';
            }
            return v;
        };
    },

    destroy: function() {
        delete this.items;
        delete this.renderer;
        return Ext.grid.ActionColumn.superclass.destroy.apply(this, arguments);
    },

    /**
     * @private
     * Process and refire events routed from the GridView's processEvent method.
     * Also fires any configured click handlers. By default, cancels the mousedown event to prevent selection.
     * Returns the event handler's status to allow cancelling of GridView's bubbling process.
     */
    processEvent : function(name, e, grid, rowIndex, colIndex){
        var m = e.getTarget().className.match(this.actionIdRe),
            item, fn;
        if (m && (item = this.items[parseInt(m[1], 10)])) {
            if (name == 'click') {
                (fn = item.handler || this.handler) && fn.call(item.scope||this.scope||this, grid, rowIndex, colIndex, item, e);
            } else if ((name == 'mousedown') && (item.stopSelection !== false)) {
                return false;
            }
        }
        return Ext.grid.ActionColumn.superclass.processEvent.apply(this, arguments);
    }
});

/*
 * @property types
 * @type Object
 * @member Ext.grid.Column
 * @static
 * <p>An object containing predefined Column classes keyed by a mnemonic code which may be referenced
 * by the {@link Ext.grid.ColumnModel#xtype xtype} config option of ColumnModel.</p>
 * <p>This contains the following properties</p><div class="mdesc-details"><ul>
 * <li>gridcolumn : <b>{@link Ext.grid.Column Column constructor}</b></li>
 * <li>booleancolumn : <b>{@link Ext.grid.BooleanColumn BooleanColumn constructor}</b></li>
 * <li>numbercolumn : <b>{@link Ext.grid.NumberColumn NumberColumn constructor}</b></li>
 * <li>datecolumn : <b>{@link Ext.grid.DateColumn DateColumn constructor}</b></li>
 * <li>templatecolumn : <b>{@link Ext.grid.TemplateColumn TemplateColumn constructor}</b></li>
 * </ul></div>
 */
Ext.grid.Column.types = {
    gridcolumn : Ext.grid.Column,
    booleancolumn: Ext.grid.BooleanColumn,
    numbercolumn: Ext.grid.NumberColumn,
    datecolumn: Ext.grid.DateColumn,
    templatecolumn: Ext.grid.TemplateColumn,
    actioncolumn: Ext.grid.ActionColumn
};