title: Draw Circle with Dash Dot in my Qt Project
body: <p>To draw Circle with dash dot what should I include and what code should I use ? I try this codes in my project not work:</p>
  
  <pre><code>QPainter painter(this);
      painter.setBackgroundColor(Qt::cyan);
      painter.setBrush(Qt::yellow);
      painter.drawEllipse(0,0,500,500);
  </code></pre>
  
  <p>I only see my normal project work not circle or area. Please help and where I write my code ? in main.cpp or myproject.cpp ? Thanks a lot.</p>