title: zooming with ctrl + mouse wheel
body: <p>My problem is very interesting to me. I am working on Qwt and I would like to enable zoom respect X and Y axis separately. I achived zoom only X axis but Y axis didn't work. I couldn't get it. I will be glad if you give an advise. </p>
  
  <p>Here is my code:</p>
  
  <pre><code>void Kmh::keyPressEvent(QKeyEvent *event)
  {
      zoom_in_out = new QwtPlotMagnifier( canvas() );
  
      if(event-&gt;key() == Qt::Key_Shift)
      {
          zoom_in_out-&gt;setWheelModifiers(Qt::ShiftModifier);
          zoom_in_out-&gt;setAxisEnabled(Qt::XAxis,false);
      }
      else if(event-&gt;key() == Qt::Key_Control)
      {
          zoom_in_out-&gt;setWheelModifiers(Qt::ControlModifier);
          zoom_in_out-&gt;setAxisEnabled(Qt::YAxis,false);
      }
  }  
  </code></pre>
  
  <p><kbd>shift</kbd> + mousewheel is working for zoom respect X axis. But <kbd>ctrl</kbd> + mousewheel is zooming both X and Y axis. What am I doing wrong? </p>
  
  <p>Regards</p>
  
  <p>Note : Sorry for my poor English.</p>