The ItemSelector extension

ItemSelector is a specialized MultiSelect field that renders as a pair with the MultiSelect field; one with the available options and the other with the selected options. A set of buttons in between, allows the items to be moved between the fields and reordered within the selection. Also, they can be moved via drag-and–drop method.

Here, in the following code, a form panel class is defined, in which we are using the ItemSelector extension as an item of this form:

Ext.define('Examples.view.itemselector.ItemSelectorFormPanel', {
  extend : 'Ext.form.Panel',
  alias : 'widget.itemselectorformpanel',
  requires : ['Ext.ux.form.ItemSelector'],

  constructor : function(config) {

    Ext.apply(this, {
      bodyPadding : 10,
      items : [{
        anchor : '100%',
        xtype: 'itemselector',
        name: 'itemselector',
        store : Ext.create('Examples.store.DummyStore'),
        valueField : 'name',
        displayField : 'name',
        fromTitle: 'Available',
        toTitle: 'Selected'

      }]
    });
  this.callParent(arguments);

  }
});

You can see in the following screenshot that the ItemSelector extension is a pair of MultiSelect field where one is loaded with data store:

We can select the values from this available field and can move those values to the Selected field. We can use the arrow buttons or drag-and-drop, to move the values within those fields or reorder between those. If we use the getValue function of this ItemSelector extension, it will return the collection of values available at the Selected field.

The documentation for this extension is available at http://docs.sencha.com/extjs/4.1.3/#!/api/Ext.ux.form.ItemSelector, where you will get all the available configuration options, properties, methods, and events for this extension.