title: QTextEdit placeholder color
body: <p>here's my problem:
  I'm using Qt, I've got two QLineEdits (name, author) and one QTextEdit (description) in my form.
  I need to set placeholders for each of them, so i wrote this code:</p>
  <pre class="lang-cpp prettyprint-override"><code>        name-&gt;setPlaceholderText(&quot;Name&quot;);
          author-&gt;setPlaceholderText(&quot;Author&quot;);
          description-&gt;setPlaceholderText(&quot;Description&quot;);
  </code></pre>
  <p>Now I want to style it using QSS, thus i wrote this:</p>
  <pre class="lang-css prettyprint-override"><code>    QLineEdit[text=&quot;&quot;],
      QTextEdit[text=&quot;&quot;] {
        color: red;
      }
  </code></pre>
  <p>But unfortunately this works only for QLineEdits and I cannot find a way to check if QTextEdit is empty in QSS.
  Do you have any idea? Thanks in advance.</p>