Я тут довел пример до логического конца. Если 10 секунд ничего не делать, то на консоль будет выкидываться сообщение
"Start ScreenSaver". Если что-то нажать, то вывод прекратится.
| Код |
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
public class ScreenSaverManager
{
public static final long AWT_EVENT_MASK = AWTEvent.MOUSE_WHEEL_EVENT_MASK
| AWTEvent.MOUSE_MOTION_EVENT_MASK
| AWTEvent.MOUSE_EVENT_MASK
| AWTEvent.KEY_EVENT_MASK;
protected long startDelay;
private Toolkit toolkit;
private long lastUserActionTime;
private AWTEventListener listener;
private StartTask startTask;
private Timer sheduleTimer;
private boolean alreadyRegistered = false;
public ScreenSaverManager(long startDelay) throws AWTException
{
if(startDelay <= 0)
throw new IllegalArgumentException("Start delay must be > 0");
this.startDelay = startDelay;
this.listener = new KeyMouseListener();
this.toolkit = Toolkit.getDefaultToolkit();
sheduleTimer = new Timer(true);
}
public synchronized void register()
{
if(!alreadyRegistered)
{
toolkit.addAWTEventListener(listener, AWT_EVENT_MASK);
listener.eventDispatched(null);
if(startTask != null)
startTask.cancel();
startTask = new StartTask();
sheduleTimer.schedule(startTask, 1000, 1000);
}
}
public synchronized void unregister()
{
toolkit.removeAWTEventListener(listener);
alreadyRegistered = false;
startTask.cancel();
startTask = null;
}
public long getStartDelay()
{
return startDelay;
}
public void setStartDelay(long startDelay)
{
this.startDelay = startDelay;
}
private class KeyMouseListener implements AWTEventListener
{
public void eventDispatched(AWTEvent event)
{
lastUserActionTime = System.currentTimeMillis();
}
}
private class StartTask extends TimerTask
{
public void run()
{
if( (System.currentTimeMillis() - lastUserActionTime) > startDelay)
{
System.out.println("Start ScreenSaver");
}
}
}
public static void main(String[] args)
{
ScreenSaverManager ssm;
try {
ssm = new ScreenSaverManager(10000);
ssm.register();
}
catch(Exception e) {
e.printStackTrace();
System.exit(0);
}
JFrame f = new JFrame();
f.setBounds(100,100,500,500);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
}
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