Vadim Vadim - 6 days ago 5
Java Question

How to handle events from keyboard and mouse in full screen exclusive mode in java?

In passive rendering mode one can use

KeyListener
and
ActionListener
interfaces to handle events from user.

What is the correct way of event handling in full screen mode? Please extend this skeleton providing implementation for mouse click and key press events, please don't bloat your example (the example starts full screen exclusive mode, using a
Timer
to update graphics in window):

import java.applet.Applet;
import java.awt.Color;
import java.awt.DisplayMode;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferStrategy;
import javax.swing.JFrame;
import javax.swing.Timer;

public class applet extends Applet
{
Timer timer;
JFrame frame;
DisplayMode[] displayModes = new DisplayMode[] {
new DisplayMode(1280, 800, 32, 60)
};

BufferStrategy bufferStrategy;
Rectangle bounds;

/**
*
*/
private static final long serialVersionUID = 1L;

/**
* @param args
*/

public void init()
{

GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment(); //displays, fonts, color shemes...
GraphicsDevice device = env.getDefaultScreenDevice(); //for one-display systems

setIgnoreRepaint(true);

GraphicsConfiguration gc = device.getDefaultConfiguration();
frame = new JFrame(gc);

device.setFullScreenWindow(frame);

if (device.isDisplayChangeSupported())
device.setDisplayMode(displayModes[0]);

frame.createBufferStrategy(2);
bufferStrategy = frame.getBufferStrategy();

timer = new Timer(1000 / 50, new ActionListener() {

@Override
public void actionPerformed(ActionEvent arg0) {
Graphics2D g = null;
try {
g = (Graphics2D) bufferStrategy.getDrawGraphics();
render(g);
} finally {
g.dispose();
}
bufferStrategy.show();
}

});

}

private void render(Graphics2D g) {
g.setColor(Color.BLACK);
g.fillRect(0, 0, bounds.width, bounds.height);
}

public void start()
{
timer.start();

}

public void stop()
{
timer.stop();
}

}

Answer

It looks like the usual approaches shown in How to Use Key Bindings and How to Write a Mouse Listener work correctly in Full-Screen Exclusive Mode.

import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;

/** @see http://stackoverflow.com/questions/7456227 */
public class FullScreenTest extends JPanel {

    private static final String EXIT = "Exit";
    private JFrame f = new JFrame("FullScreenTest");
    private Action exit = new AbstractAction(EXIT) {

            @Override
            public void actionPerformed(ActionEvent e) {
                f.dispatchEvent(new WindowEvent(
                    f, WindowEvent.WINDOW_CLOSING));
            }
        };
    private JButton b = new JButton(exit);

    public FullScreenTest() {
        this.add(b);
        f.getRootPane().setDefaultButton(b);
        this.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_Q, 0), EXIT);
        this.getActionMap().put(EXIT, exit);
        this.addMouseMotionListener(new MouseAdapter() {

            @Override
            public void mouseMoved(MouseEvent e) {
                FullScreenTest.this.setToolTipText(
                    "("+ e.getX() + "," + e.getY() + ")");
            }
        });
    }

    private void display() {
        GraphicsEnvironment env =
            GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice dev = env.getDefaultScreenDevice();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setBackground(Color.darkGray);
        f.setResizable(false);
        f.setUndecorated(true);
        f.add(this);
        f.pack();
        dev.setFullScreenWindow(f);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new FullScreenTest().display();
            }
        });
    }
}
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