title: How to change focus between TextEdit boxes using tab key
body: <p>I have 2 TextEdit boxes and 5 buttons that are arranged in linear order.</p>
  
  <ol>
  <li>The focus should be on the first TextEdit box when the program is started.</li>
  <li>When tab key is pressed it should change the focus to the next widget.</li>
  </ol>
  
  <p>Actually when a tab key is pressed the tab space is entered inside the TextEdit box. instead of moving to the next box. I also cannot use LineEdit Box because the input needs to be displayed in multiple lines. anyway the input wont contain enter key or '\n' </p>