How to create ButtonGroup of JToggleButton's that allows to deselect the actual option?
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, captu开发者_开发知识库re the event to do something.
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();
}
}
}
This shows exactly how to do that https://dzone.com/articles/unselect-all-toggle-buttons
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();
}
}
}
Capture the event to do something. Also do the below.
@Override
public void actionPerformed(ActionEvent e) {
((JToggleButton)e.getSource()).setSelected(false);
}
EDIT: But there is no ButtonGroup involved.
Solution for pre java 1.6
public class NoneSelectedButtonGroup extends ButtonGroup {
private AbstractButton hack;
public NoneSelectedButtonGroup() {
super();
hack = new JButton();
add(hack);
}
@Override
public void setSelected(ButtonModel model, boolean selected) {
super.setSelected(selected ? model : hack.getModel(), true);
}
}
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