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Swing / AWT / SWT

Underline first character of a JButton?

Adam Till

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posted 21 years ago

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Hi
I have set the mnemonic on a JButton but how do I underline the specified character?
Thanks for your help.

Adam Till<br />SCJP SCJD SCWCD

Nathan Pruett

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posted 21 years ago

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I'm using JDK1.4.1_01 and it looks like setMnemotic( int ) automatically underlines the first occurance of the mnemotic character in the title of the button...

You are using the appropriate KeyEvent.VK_* for the parameters, right? So I'm not sure what you're having problems with... Could you provide an example of the code that doesn't work?

-Nate
Write once, run anywhere, because there's nowhere to hide! - /. A.C.

Adam Till

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posted 21 years ago

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Hi
I have managed to get it working with the following:-
String localLabel = "<html><a style='text-decoration:underline'>L</a>ocal Connection</html>";
JButton local = new JButton(localLabel);
It did not seem to add the underline automatically, I am using the same JDK. So I used HTML, several HTML tags are being deprecated so I had to use CSS inline. Is this the only way I wonder?

Adam Till<br />SCJP SCJD SCWCD

Nathan Pruett

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posted 21 years ago

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Hmmmm... it's working for me to do :

What OS are you using, and what look and feel?

-Nate
Write once, run anywhere, because there's nowhere to hide! - /. A.C.

Jawad Kakar

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posted 21 years ago

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If you have a second button which starts with "L" and you want to use to underline "L" would not work for the second button, HTML is the way to go.
Thank you
Jawad

Nathan Pruett

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posted 21 years ago

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Ummm... sorry, Jawad... but it's working for me in that case, too...

The mnemotic only actually works for the last component it was applied to, but the appropriate character on all the components it was applied to are underlined...

import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.*;
 
public class MnemoticTest extends JFrame {
 
    private JTextArea ta;
 
    public MnemoticTest() {
        super( "Mnemotic Test" );
        ta = new JTextArea();
        ActionListener echo = new Echoer();
        getContentPane().add( new JScrollPane( ta ) );
        JPanel buttons = new JPanel();
        buttons.setLayout( new GridLayout( 1, 0 ) );
 
        JButton a = new JButton( "Apple" );
        a.setMnemonic( KeyEvent.VK_A );
        a.addActionListener( echo );
        buttons.add( a );
 
        JButton b = new JButton( "Bananna" );
        b.setMnemonic( KeyEvent.VK_B );
        b.addActionListener( echo );
        buttons.add( b );
 
        JButton c = new JButton( "Carrot" );
        c.setMnemonic( KeyEvent.VK_A );
        c.addActionListener( echo );
        buttons.add( c );
 
        JButton local = new JButton( "Local Connection" );
        local.setMnemonic( KeyEvent.VK_L );
        local.addActionListener( echo );
        buttons.add( local );
 
        JButton licorice = new JButton( "Licorice" );
        licorice.setMnemonic( KeyEvent.VK_L );
        licorice.addActionListener( echo );
        buttons.add( licorice );
 
        getContentPane().add( buttons, BorderLayout.SOUTH );
    }
 
    private class Echoer implements ActionListener {
        public void actionPerformed( ActionEvent e ) {
            ta.append( e.getActionCommand() + "\n" );
        }
    }
 
    public static void main( String[] args ) {
        JFrame f = new MnemoticTest();
        f.setDefaultCloseOperation( WindowConstants.EXIT_ON_CLOSE );
        f.setSize( 500, 300 );
        f.show();
    }
}

-Nate
Write once, run anywhere, because there's nowhere to hide! - /. A.C.

Jawad Kakar

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posted 21 years ago

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Thank you, for correcting me.
Jawad

Adam Till

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posted 21 years ago

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Right, figured the problem. My platform is XP and when my app starts I set the look and feel to getSystemLookAndFeelClassName(). If I remove this then yes it works.
I am still getting used to the 'look and feel' aspects, but what I was trying to do was use any systems default (for no other reason than scientific purposes so could just use the java defualt).
Any comments?
Thanks all,

Adam Till<br />SCJP SCJD SCWCD

Nathan Pruett

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posted 21 years ago

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That's weird... the Windows Look & Feel doesn't underline at all...

Guess it's just yet another way Windows is broken...

-Nate
Write once, run anywhere, because there's nowhere to hide! - /. A.C.

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