title: Eclipse : DialogCellEditor class.. how to always show the button?
body: <p>I'm extending DialogCellEditor  to make a cell in a table looks like this
  but the button appears only when I set focus to that cell (ie. when I click on the cell)</p>
  
  <p>How could I always show this button even before setting focus ?</p>
  
  <p><img src="https://i.stack.imgur.com/xXok7.png" alt="enter image description here"></p>