How to add hotkey(Ctrl+VK) to a button?

rpwtdj · #1 (**permalink**) 01-09-2008, 04:19 AM

Hi buddies,
I've added a button to a panel, and used

Code:

setMnemonic(KeyEvent.VK_R)

to set a hotkey Alt+R for triggering the button event.
However, the requirement is changed, now, I need to use 'Ctrl+R' as the
hotkey for the button.
Will you please give me some hit on this?
Thanks!

hardwired · #2 (**permalink**) 01-09-2008, 06:06 AM

Code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Test {
    public static void main(String[] args) {
        JButton button = new JButton();
        button.setAction(new AbstractAction("press me") {
            {
                putValue(Action.ACTION_COMMAND_KEY, getValue(Action.NAME));
            }
            public void actionPerformed(ActionEvent e) {
                System.out.println(e.getActionCommand());
            }
        });
        JPanel panel = new JPanel();
        panel.add(button);
        panel.setPreferredSize(new Dimension(200,100));
        // Bind a keystroke to the button to act as accelerator.
        int c = JComponent.WHEN_IN_FOCUSED_WINDOW;
        KeyStroke ks = KeyStroke.getKeyStroke(KeyEvent.VK_R,
                                    InputEvent.CTRL_DOWN_MASK);
        panel.getInputMap(c).put(ks, "PRESS");
        panel.getActionMap().put("PRESS", button.getAction());
        JOptionPane.showMessageDialog(null, panel,"", -1);
    }
}

rpwtdj · #3 (**permalink**) 01-09-2008, 08:28 AM

Thank you hardwired.
Great help.

rpwtdj · #4 (**permalink**) 01-09-2008, 09:09 AM

How can I make the 'r' in "press me" underlined?
so that the button will look like "press me"

hardwired · #5 (**permalink**) 01-10-2008, 01:58 AM

Swing labels support primitive html 3.2:

Code:

        String s = "<html>p<u>r</u>ess me";
        button.setAction(new AbstractAction(s) {
            {
                putValue(Action.ACTION_COMMAND_KEY, "press me");
            }

rpwtdj · #6 (**permalink**) 01-10-2008, 03:13 AM

That would be great!
Thank you