package org.csstudio.swt.xygraph.toolbar;
import java.util.ArrayList;
import java.util.Collection;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
/**
* Class behaves like swing ButtonGroup because I
* could not find a jface class for this. Probably
* because Actions are not very commonly uses and
* actions are configured via the plugin.xml
*/
public class CheckableActionGroup implements IPropertyChangeListener {
private Collection<IAction> actions = new ArrayList<IAction>(7);
public void add(IAction action) {
if (action.getStyle() != IAction.AS_CHECK_BOX) throw new RuntimeException("Only check actions are supported!");
action.addPropertyChangeListener(this);
actions.add(action);
}
private boolean off = false;
@Override
public void propertyChange(PropertyChangeEvent event) {
if (off) return;
try {
off = true;
final Action action = (Action)event.getSource();
final Collection<IAction> others = new ArrayList<IAction>(actions);
others.remove(action);
action.setChecked(true);
for (IAction other : others) other.setChecked(false);
} finally {
off = false;
}
}
public void dipose() {
actions.clear();
}
}