Hi all, I have a combobox binded to a store. When I click an option a dataview below is filtered.
Here's a sample of what I'm doing:

new Ext.form.ComboBox({
    id: 'mycombo',
    typeAhead: true,
    mode: 'local',
    store: mycombo_store,
    triggerAction: 'all',
    valueField: 'id',
    tpl: mycombo_tpl,
    editable: false,
    listeners: {
        select: function(combo, record, index) {
            var store = Ext.getCmp('mydataview').getStore();
            store.filterBy(function(currentrecord, id) {
                if (currentrecord.data.isgood == record.data.isgood)
                    return true;
                    return false;
I'd like to know if there's a way to put a "show all" option in the combobox before the options taken from the mycombo_store.
I've tried to put it in the tpl in this way:

mycombo_tpl = new Ext.XTemplate('<div class="x-combo-list-item">Show all</div><tpl for="."><div class="x-combo-list-item">{name} ({sex})</div></tpl>');
but it seems that the combo selection index crash: I select an option and combobox show me the next one.

Anybody knows the trick?