How to create ButtonGroup of JToggleButton's that allows to deselect the actual option?

Question

That's it. I need to create a ButtonGroup that allows to select a option or, if the user click on the selected option, deselect the item (nothing will be selected) and, of course, capture the event to do something.

Answer 1

Just in case Jeff's link is broken in the future, here's what's described: you need to subclass ButtonGroup to allow a no-selection, and add your buttons to this buttongroup.

public class NoneSelectedButtonGroup extends ButtonGroup {

  @Override
  public void setSelected(ButtonModel model, boolean selected) {
    if (selected) {
      super.setSelected(model, selected);
    } else {
      clearSelection();
    }
  }
}

Answer 2

I noticed weird behavior when doing button.setSelected(false) on a button/checkbox that is not selected. It deselected everything as if I deselected something.

I fixed it this way:

public class NoneSelectedButtonGroup extends ButtonGroup {

  @Override
  public void setSelected(ButtonModel model, boolean selected) {
    if (selected) {
      super.setSelected(model, selected);
    } else if (getSelection() != model) {
      clearSelection();
    }
  }
}