title: Flutter TextField disabled with border
body: <p>When I use the TextField Widget with <code>enabled</code> parameter set to<code>false</code>, the border disappears.</p>
  
  <pre class="lang-dart prettyprint-override"><code>     Flexible(
            child: 
             TextField(
                    onTap: () {
                  Future&lt;DateTime&gt; dateTime = _buildDataHoraInicial(context);
                  dateTime.then((date){
                      _dataHoraInicial = date;
                      _dataTempoInicialController.text = date.toIso8601String();
                      print(_dataHoraInicial);
                  });
                },
                controller: _dataTempoInicialController,
                style: TextStyle(color: Colors.white),
                decoration: InputDecoration(
                    contentPadding: const EdgeInsets.symmetric(vertical: 15.0),
                    enabledBorder: OutlineInputBorder(
                        borderSide: BorderSide(color: Color(0xfff7b733))),
                    prefixIcon: Icon(
                      Icons.calendar_today,
                      color: Color(0xfff7b733),
                      size: 16.0,
                    ),
                    suffixIcon: Icon(Icons.access_time,
                        color: Color(0xfff7b733), size: 16.0),
                    border: OutlineInputBorder(
                        borderSide: BorderSide(color: Color(0xfff7b733))),
                    labelText: 'Data e Hora de Início',
                    fillColor: Colors.white,
                    hintStyle: TextStyle(color: Colors.white),
                    labelStyle: TextStyle(
                        fontSize: 16.0, color: const Color(0xfff7b733))),
              ),
            ),
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/EMMIj.png" rel="nofollow noreferrer">image of the TextField Widget</a></p>
  
  <p>How can I use TextField Widget with <code>enabled</code> parameter set to <code>true</code> keeping the border?</p>