ItemListener for ComboBox
I have this scenario: I want to pick up a particular item from a combo box using my up and down keys. After selecting the item, if I press enter, it should pop up a dialog.
The combo box listener should also listen to mouse events.
Can using itemStateChanged(ItemEvent e) of ItemListener for the combo box make this happen?
I saw that it has got a method getStateChanged(ItemEvent e) in it.
I tried this:
public void itemStateChanged(ItemEvent e)
{ if ((e.getStateChange() == ItemEvent.SELECTED)
..........
}
This however, detects only the up and down arrow movements, but doesn't meet the requirements that I have.
Is there any other listeners for ComboBox that would be best suited for this situation?
Thanks
cooler
[798 byte] By [
coolera] at [2007-10-1 22:23:11]
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class EnterKey
{
JDialog dialog;
public EnterKey()
{
initDialog();
}
private void initDialog()
{
dialog = new JDialog(new Frame(), "dialog", false);
dialog.getContentPane().add(new JLabel("hello world", JLabel.CENTER));
dialog.setSize(100,100);
dialog.setLocation(425, 200);
}
private JPanel getComboPanel()
{
String[] birds = {
"crow", "bluebird", "hawk", "crane",
"ibis", "heron", "bluejay", "robin"
};
JComboBox combo = new JComboBox(birds);
registerKey(combo);
combo.addItemListener(new ComboListener());
JPanel panel = new JPanel();
panel.add(combo);
return panel;
}
private void registerKey(JComponent c)
{
Object name = showDialog.getValue(Action.NAME);
c.getInputMap().put(KeyStroke.getKeyStroke("ENTER"), name);
c.getActionMap().put(name, showDialog);
}
private Action showDialog = new AbstractAction("showDialogAction")
{
public void actionPerformed(ActionEvent e)
{
dialog.setVisible(true);
}
};
private class ComboListener implements ItemListener
{
public void itemStateChanged(ItemEvent e)
{
if(e.getStateChange() == ItemEvent.SELECTED)
{
System.out.println(e.getItem());
}
}
}
public static void main(String[] args)
{
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(new EnterKey().getComboPanel());
f.setSize(200,100);
f.setLocation(200,200);
f.setVisible(true);
}
}
