CODEWITHSUNDEEP
javaswingjcombobox
Jason S
Jason S

Reputation: 189626

Swing: detect Enter in JComboBox?

I've tried using getInputMap() + getActionMap() on a JComboBox and it seems to have no effect.

I've tried addActionListener() / addItemListener() on a JComboBox and I can't seem to distinguish a change of selection from someone pressing the Return/Enter key.

Any suggestions? In my application, I want the Return/Enter key to be stronger than just selecting, it's a selecting + applying action.

Here's my code to setup the key binding. It works fine (e.g. note("hit ENTER") is called) when component is a JList, but doesn't work when component is a JComboBox.

private void setupApplyProfile(final JComponent component, final MyComboBoxModel mcbm)
{   
    String enterAction = "applyItem";
    KeyStroke enterKey = KeyStroke.getKeyStroke("ENTER");
    component.getInputMap().put(enterKey, enterAction);
    component.getActionMap().put(enterAction, new AbstractAction()
    {
        @Override public void actionPerformed(ActionEvent e) {
            note("hit ENTER");
            applySelectedProfile(mcbm);
        }
    });
}

Upvotes: 2

Views: 5665

Answers (2)

Jason S
Jason S

Reputation: 189626

Aha, this seems to work: note("cb editor action") gets called when I hit Enter in the combo box field.

        comboBox.getEditor().addActionListener(new ActionListener() {
            @Override public void actionPerformed(ActionEvent arg0) {
                note("cb editor action");
            }               
        });

Upvotes: 4

camickr
camickr

Reputation: 324098

In my application, I want the Return/Enter key to be stronger than just selecting, it's a selecting + applying action.

If I understand the question you can use the following:

comboBox.putClientProperty("JComboBox.isTableCellEditor", Boolean.TRUE);

The ActionEvent and ItemEvents will only be fired when an item is selected from the drop down list when you use the mouse or the enter key. The eEvents will not be fired if you navigate the drop down list using the up/down arrow keys.

Upvotes: 3

Related Questions