Re: Keyboard state (instead of keyboard events)

Philipp Gressly wrote:


With all your help, I have implemented the code below.

It works in 99%, because the gnome "keyPressed.getWhen()" has
mostly the same value as a previous "keyReleased.getWhen()" in case
of the "key-repeat-sequence". Very rarely the below mentioned code
reports "down: false", but it should be "down: true". It would be
interesting to have some feedback about other operating systems.

Thanks

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

/**
 * @author Philipp Gressly (phi@gressly.ch)
 * after a code from Luther :
http://forums.sun.com/thread.jspa?threadID=698156
 */

public class IgnoreRepeats extends JFrame implements KeyListener,
Runnable {

    private long oldWhen = 0L;
    public boolean down;

    /* starter */
    public static void main(String[] _) {
        new IgnoreRepeats("Test Frame").top(); }

    public IgnoreRepeats(String name){
        super(name); }

    private void top() {
        super.addKeyListener (this) ;
        super.setDefaultCloseOperation (EXIT_ON_CLOSE);
        setSize (300, 300) ;
        setVisible (true) ;
        new Thread(this). start(); }

    public void run() {
        while (true) {
            System.out.println("down: " + down);
            try {
                Thread.currentThread().sleep(40);

            } catch (InterruptedException e) { }
        }
    }

    public void keyReleased(final KeyEvent e) {
        if (oldWhen == e.getWhen()) return;
        down = false; }

    public void keyPressed(final KeyEvent e) {
        long now = e.getWhen();
        if (oldWhen == now) return;
        oldWhen = now;
        down = true; }

    /* ignore */
    public void keyTyped(KeyEvent e) {}

} // end "IgnoreRepeats"