how to use combox as textfield and combox in grid editor

[genTaliaru]

I have a grid editor and the column editor is setted to Ext.form.Combobox.
So far it works perfectly

columnModel
....
			dataIndex: 'categoryName',
			header: tra("category_name"),
			width: 200,
			editor: new Ext.form.ComboBox(
			{
				store: Editor.Data.productModuleCategoriesOptions,
				valueField: 'ID',
				displayField: 'name',
				typeAhead: true,
				triggerAction: 'all',
				lazyRender: true,
				forceSelection: false,
				listClass: 'x-combo-list-small',
				editable: false
			})
....

If the store dosent have the value what the user want, then i want to ta allow user to write their own values.

But if i do this then combo box selects automatlici last value from list

How do i allow write value as textbox

[smit_al]

editable: true

[genTaliaru]

If i blur the field, the combobox takse the last selected value, but shoult take the value whate user has wrote