CheckboxMenuItem added to dock fires itemevent returning String rather than CheckboxMenuItem
Paul Taylor
paul_t100 at fastmail.fm
Wed Nov 20 02:05:47 PST 2013
On OSX Java 7 (1.7.0_40) I wanted to add some mutually exclusive
CheckBoxItems to the dock menu, in order to create the mutual
exclusivity I used the answer here by
http://stackoverflow.com/questions/13596428/adding-a-checkbox-group-to-a-java-menu/20092694#20092694
provided by Julian Wright to create the equivalent of ButtonGroup
available for JCheckBoxMenuItems
But I ran into a problem, the object returned by ItemEvent is of type
String rather than CheckBoxMenuItem, I worked round it with the code
below but this is an OSX bug isnt it ?
|import java.awt.*;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.HashSet;
import java.util.Set;
public class CheckboxMenuItemGroup implements ItemListener
{
private Set<CheckboxMenuItem> items= new HashSet<CheckboxMenuItem>();
public void add(CheckboxMenuItem cbmi) {
cbmi.addItemListener(this);
cbmi.setState(false);
items.add(cbmi);
}
@Override
public void itemStateChanged(ItemEvent e) {
if (e.getStateChange() == ItemEvent.SELECTED) {
String itemAffected= (String)e.getItem();
for (CheckboxMenuItem item: items) {
if (item.getLabel() != itemAffected) item.setState(false);
}
}
}
public void selectItem(CheckboxMenuItem itemToSelect) {
for (CheckboxMenuItem item: items) {
item.setState(item== itemToSelect);
}
}|
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