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 * @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'));
                    }