ext 简单 json定义 combo

Ext.ux.ComboBox = function(config) {
    if (Ext.isArray(config.store)) {
            var store = [];
            for (var i = 0, len = config.store.length; i < len; i++)
                store[i] = [config.store[i]];
            config.store = new Ext.data.JsonStore({
                        fields : ['valuefield', 'displayfield'],
                        data : config.store
                    });
            config.valueField = 'valuefield';
            config.displayField = 'displayfield';
    }
    Ext.ux.ComboBox.superclass.constructor.call(this, config);
}
Ext.extend(Ext.ux.ComboBox, Ext.form.ComboBox, {

});
Ext.reg('comboux', Ext.ux.ComboBox);

用法：

{"233",store:[{valuefield:"1",displayfield:"男"},{valuefield:"2",displayfield:"女"},{valuefield:"3",displayfield:"李宇春} ],allowBlank:false
                    ,fieldLabel:"性别",mode:"local",xtype:"comboux",readOnly:true,displayField:"displayfield",valueField:"valuefield"
                    ,name:"gm",triggerAction:"all",hiddenName:'gm'}