问题
How can I set the timeout for a JDialog when it is idle for example 90 seconds?
It exits once no action, movement ,selection is done in the JDialog for 90 seconds.
This thread gives timeouts but no idle condition - Can I set a timer on a Java Swing JDialog box to close after a number of milliseconds
Thanks!
回答1:
Okay, so the biggest problem will be getting enough information about interaction from the user. You could try using AWTEventListener, which is a way to monitor AWTEvents going through the EventQueue and should, for the most part, give you enough information about possible interactions.
Because not ALL events go through the EventQueue, there might be some times when this might not always work in which case, you will need to attach additional listeners to the components giving you trouble and reset the timer manually...
import java.awt.AWTEvent;
import java.awt.Component;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.GraphicsConfiguration;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.AWTEventListener;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
IdleDialog dialog = new IdleDialog(5, (Window) null, "Testing");
dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
dialog.add(new TestPane());
dialog.pack();
dialog.setLocationRelativeTo(null);
dialog.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
add(new JLabel("This is a bad idea"), gbc);
add(new JButton("Don't tell me"), gbc);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
}
public class IdleDialog extends JDialog {
private long timeOut = 90 * 1000;
private long startTime;
private Timer timer;
private String originalTitle;
public IdleDialog(long timeOut) {
init(timeOut);
}
public IdleDialog(long timeOut, Frame owner) {
super(owner);
init(timeOut);
}
public IdleDialog(long timeOut, Frame owner, boolean modal) {
super(owner, modal);
init(timeOut);
}
public IdleDialog(long timeOut, Frame owner, String title) {
super(owner, title);
init(timeOut);
}
public IdleDialog(long timeOut, Frame owner, String title, boolean modal) {
super(owner, title, modal);
init(timeOut);
}
public IdleDialog(long timeOut, Frame owner, String title, boolean modal, GraphicsConfiguration gc) {
super(owner, title, modal, gc);
init(timeOut);
}
public IdleDialog(long timeOut, Dialog owner) {
super(owner);
init(timeOut);
}
public IdleDialog(long timeOut, Dialog owner, boolean modal) {
super(owner, modal);
init(timeOut);
}
public IdleDialog(long timeOut, Dialog owner, String title) {
super(owner, title);
init(timeOut);
}
public IdleDialog(long timeOut, Dialog owner, String title, boolean modal) {
super(owner, title, modal);
init(timeOut);
}
public IdleDialog(long timeOut, Dialog owner, String title, boolean modal, GraphicsConfiguration gc) {
super(owner, title, modal, gc);
init(timeOut);
}
public IdleDialog(long timeOut, Window owner) {
super(owner);
init(timeOut);
}
public IdleDialog(long timeOut, Window owner, ModalityType modalityType) {
super(owner, modalityType);
init(timeOut);
}
public IdleDialog(long timeOut, Window owner, String title) {
super(owner, title);
init(timeOut);
}
public IdleDialog(long timeOut, Window owner, String title, ModalityType modalityType) {
super(owner, title, modalityType);
init(timeOut);
}
public IdleDialog(long timeOut, Window owner, String title, ModalityType modalityType, GraphicsConfiguration gc) {
super(owner, title, modalityType, gc);
init(timeOut);
}
protected void init(double timeOutValue) {
this.timeOut = Math.round(timeOutValue * 1000);
timer = new Timer(1000, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
long runningTime = System.currentTimeMillis() - startTime;
System.out.println(runningTime + "/" + timeOut);
if (runningTime >= timeOut) {
timer.stop();
dispose();
} else {
String title = originalTitle + " [" + (((timeOut - runningTime) / 1000) + 1) + "]";
setTitle(title);
}
}
});
originalTitle = getTitle();
String title = originalTitle + " [" + ((timeOut / 1000)) + "]";
setTitle(title);
addPropertyChangeListener("title", new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (!timer.isRunning()) {
originalTitle = (String) evt.getNewValue();
}
}
});
addWindowListener(new WindowAdapter() {
@Override
public void windowOpened(WindowEvent e) {
timer.start();
}
@Override
public void windowClosed(WindowEvent e) {
timer.stop();
}
});
Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener() {
@Override
public void eventDispatched(AWTEvent event) {
Object source = event.getSource();
if (source instanceof Component) {
Window win = null;
if (!(source instanceof Window)) {
win = SwingUtilities.getWindowAncestor((Component) source);
} else {
win = (Window) source;
}
if (IdleDialog.this.equals(win)) {
if (win.isVisible() && timer.isRunning()) {
resetTimeout();
}
}
}
}
}, AWTEvent.ACTION_EVENT_MASK
| AWTEvent.ADJUSTMENT_EVENT_MASK
| AWTEvent.COMPONENT_EVENT_MASK
| AWTEvent.CONTAINER_EVENT_MASK
| AWTEvent.FOCUS_EVENT_MASK
| AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK
| AWTEvent.HIERARCHY_EVENT_MASK
| AWTEvent.INPUT_METHOD_EVENT_MASK
| AWTEvent.INVOCATION_EVENT_MASK
| AWTEvent.ITEM_EVENT_MASK
| AWTEvent.KEY_EVENT_MASK
| AWTEvent.MOUSE_EVENT_MASK
| AWTEvent.MOUSE_MOTION_EVENT_MASK
| AWTEvent.MOUSE_WHEEL_EVENT_MASK
| // AWTEvent.PAINT_EVENT_MASK |
AWTEvent.TEXT_EVENT_MASK
| AWTEvent.WINDOW_EVENT_MASK
| AWTEvent.WINDOW_FOCUS_EVENT_MASK
| AWTEvent.WINDOW_STATE_EVENT_MASK
);
}
public void resetTimeout() {
timer.restart();
startTime = System.currentTimeMillis();
String title = originalTitle + " [" + ((timeOut / 1000)) + "]";
setTitle(title);
}
}
}
回答2:
You can also check out Application Inactivity for a more general purpose solution that you can use on any window (frame, dialog).
You just provide an Action you want to invoke after a certain time of inactivity and the Action will automatically be invoked.
来源：https://stackoverflow.com/questions/31932602/jdialogs-timeout-when-idle