title: Some grid lines, varying thickness, with Java SWT
body: <p>I have seen other questions about having lines in a composite widget with grid layout, but I'd like to have lines only in some places, and I'd like to have occasional thicker (2-pixel) lines. Something like this: <img src="https://i.stack.imgur.com/FON7A.gif" alt="enter image description here" /></p>
  <p>The widgets in the grid will mostly be canvas, also labels (or something else with text, not sure yet).</p>
  <p>My current idea is that each of the widgets in the grid has a line on the bottom and on the right, so widgets in certain columns would have a thicker line on the right and widgets in certain rows would have a thicker line underneath. But is there a better (neater or more efficient) way to do it?</p>