ambari/ambari-web/app/templates/common/configs/widgets/combo_config_widget.hbs

{{!
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
}}

<p class="widget-config-label">{{view.configLabel}}</p>
<div class="input-append pull-left">
  {{view Em.TextField valueBinding="view.content.value" disabled="disabled"}}
  <div class="dropdown btn-group">
    <button class="btn dropdown-toggle" data-toggle="dropdown">
      <span class="caret"></span>
    </button>
    <ul class="dropdown-menu">
      {{#each item in view.content.valuesList}}
        <li>
          <a href="#" {{action setConfigValue item.configValue target="view"}}>{{item.widgetValue}}</a>
        </li>
      {{/each}}
    </ul>
  </div>
</div>
{{view App.RestoreConfigView}}
<div class="clearfix"></div>