title: How to make tracks for editing using WPF
body: <p>I'am writing a video editor and I need to add tracks in it. These things should support next actions (using mouse):</p>
  
  <ul>
  <li><p>1)Borders positions changing( you can cut video/audio with it)</p></li>
  <li><p>2)Track position changing relative to global timeline.</p></li>
  </ul>
  
  <p>As you see these tracks are something like Adobe Premiere and Sony Vegas tracks but much simpler. My question is how to get this functionality using WPF. Which WPF controls can help me? I tried to use sliders but I failed.</p>