title: Set Color QTextEdit
body: <p>I'm working with the QTextEdit class. 
  I would like to set a predefinite color for my edit block. 
  When I open the textEdit and I begin to write something, I want to write the characters with a color that is different from zero. 
  I've tried to insert the following code, in the costructor of the class: </p>
  
  <pre><code>ui-&gt;textEdit-&gt;setTextColor(Qt::red)
  </code></pre>
  
  <p>but it doesn't work. 
  Thanks for the help </p>