manager/templates/default/element/tv/renders/input/listbox-single.tpl
<select id="tv{$tv->id}" name="tv{$tv->id}">
{foreach from=$opts item=item}
<option value="{$item.value}" {if $item.selected} selected="selected"{/if}>{$item.text}</option>
{/foreach}
</select>
<script>
// <![CDATA[
{literal}
Ext.onReady(function() {
var fld = MODx.load({
{/literal}
xtype: 'combo'
,transform: 'tv{$tv->id}'
,id: 'tv{$tv->id}'
,triggerAction: 'all'
,width: 400
,allowBlank: {if $params.allowBlank == 1 || $params.allowBlank == 'true'}true{else}false{/if}
{if $params.title|default},title: '{$params.title|default}'{/if}
{if $params.listWidth|default},listWidth: {$params.listWidth|default}{/if}
,maxHeight: {if $params.maxHeight|default}{$params.maxHeight|default}{else}300{/if}
{if $params.typeAhead == 1 || $params.typeAhead == 'true'}
,typeAhead: true
,typeAheadDelay: {if $params.typeAheadDelay|default && $params.typeAheadDelay|default != ''}{$params.typeAheadDelay|default}{else}250{/if}
{else}
,editable: false
,typeAhead: false
{/if}
{if $params.listEmptyText|default}
,listEmptyText: '{$params.listEmptyText|default}'
{/if}
,forceSelection: {if $params.forceSelection|default && $params.forceSelection|default != 'false'}true{else}false{/if}
,msgTarget: 'under'
{literal}
,listeners: { 'select': { fn:MODx.fireResourceFormChange, scope:this}}
});
Ext.getCmp('modx-panel-resource').getForm().add(fld);
});
{/literal}
// ]]>
</script>