Cannot get selected value from combobox

[earist]

- I create panel that contains gear tool for select view option

1.Panel.jpg

- When click gear, Option window will be shown. You can select view on the window.
2.Option window.png

- When click Save button, message dialog will be shown and display selected value.
3.Message Dialog.png

but when I select other view (such as Thumbnail or Detail), the dialog still display "View = list" .

See following code

Ext.define('Me.Portlet.ProjectList', {
   extend: 'Ext.panel.Panel',
   alias: 'widget.portlet',
   layout: 'fit',
   anchor: '100%',
   frame: true,
   closable: true,
   collapsible: true,
   animCollapse: true,
   draggable: true,
    id : 'project_list',
    title : 'Project List',
    layout : 'anchor',
    

    initComponent: function(){
   
   Ext.apply(this, {      
      tools : [ {
         xtype: 'tool',
         type: 'gear',
         handler: function(e, el, panel, tool) {
         
         var win;
         if (!win){           
            var form = Ext.create('Ext.form.Panel', {
               padding : '10px 10px 10px 10px',
               labelWidth : 50,
               labelSeparator : ':',
               items: [
                {
                   xtype : 'fieldcontainer',
                   combineErrors: true,
                   msgTarget: 'side',
                   fieldLabel: 'View',
                   defaults: {
                      hideLabel: true
                   },
                   items : [
                      {
                         width:          50,

                         xtype:          'combobox',
                         mode:           'local',
                         value:          'list',
                         triggerAction:  'all',
                         forceSelection: true,
                         editable:       false,
                         fieldLabel:     'View',
                         name:           'View',
                         displayField:   'label',
                         valueField:     'value',
                         queryMode: 'local',
                         store: new Ext.data.Store({
                            fields : ['value', 'label'],
                            data   : [
                               {value : 'list',   label: 'List'},
                               {value : 'thumbnails',  label: 'Thumbnails'},
                               {value : 'details', label: 'Details'}
                            ]
                         }) 
                      }
                   ]
                }
             ],
               buttons: [
                   {
                       text   : 'Save',
                       handler: function() {
                           var f = form.form;
                           var s = '';
                           if (f.isValid()) {
                               Ext.iterate(f.getValues(), function(key, value) {
                                   s += Ext.util.Format.format("{0} = {1}<br />", key, value);
                               }, this);

                               Ext.Msg.alert('Form Values', s);
                           }
                       }
                   },

                   {
                       text : 'Close',
                         handler : function() {
                            this.up('window').hide();
                         }
                   }
               ]
           });
            
            win = Ext.widget('window', {
               title : 'Options',
               layout : 'fit',
               width : 300,
               height : 120,
               closable: true,
               closeAction: 'hide',
               plain : false,
               modal : true,
               shim : true,
               stateful : true,
               items: form

            });
         }
            if (win.isVisible())
               win.hide();
            win.show();
         }
      } 
      ]
   });
   this.callParent(arguments);
}
});

Thank in advance.

[jjerome]

Is this Ext JS? This is the Sencha Touch section.

[earist]

Oh! sorry, I posted at incorrect section.
This is about Ext JS question.
Can anyone move this topic to correct section?