title: WPF Fast Click Events become a Drag-Event
body: <p>I have the problem, that fast clicks become a drag-event.</p>
  
  <p>I use the preventMouseButtonDown event to get the start position:</p>
  
  <pre><code>private void previewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
  {
      _pointStartDrag = e.GetPosition(null);
  }
  </code></pre>
  
  <p>The previewMouseMove-event delivers the actual position. I compare the two points to trigger my drag-event.</p>
  
  <pre><code>Vector d = _pointStartDrag - e.GetPosition(null);
  if( |d.x| &gt; minDx || |d.y| &gt; minDy)
      //here is my drag-event
  </code></pre>
  
  <p>Whatever minDx/y is set, it is reached by fast clicking two different poinst on my gui.</p>
  
  <p>I don't know what went wrong. Any ideas?</p>