JFrame.getLocationOnScreen () for minimized window
I am calling getLocationOnScreen()
from JFrame
in my Swing application. If JFrame
-32000 is minimized, -32000 is returned.
Expected:
Location coordinates on computer Display X = -32000, Y = -32000
But I need to know the location of the window before it was minimized, or what would be the location if it would be maximized again without actually maximizing it. As I need to position JDialog
relatively JFrame
even if it is minimized.
Possible solution:
Add coordinates WindowListener
to JFrame
and windowIconified()
store coordinates in the event. And then use it instead getLocationOnScreen()
.
Is there a better solution using only methods JFrame
?
A multi-screen configuration is expected and the following code is used.
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] gs = ge.getScreenDevices();
for (int j = 0; j < gs.length; j++) {
GraphicsDevice gd = gs[j];
GraphicsConfiguration[] gc = gd.getConfigurations();
for (int i = 0; i < gc.length; i++) {
Rectangle gcBounds = gc[i].getBounds();
Point loc = topContainer.getLocationOnScreen(); //might return -32000 when minimized
if (gcBounds.contains(loc)) { //fails if -32000 is returned
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Just use getLocation()
. Minimized or not, it always returns the appropriate value:
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestJFrame {
public void initUI() {
final JFrame frame = new JFrame(TestJFrame.class.getSimpleName());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(600, 400);
frame.setVisible(true);
Executors.newScheduledThreadPool(1).scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
System.err.println(frame.getLocation());
}
}, 0, 1000, TimeUnit.MILLISECONDS);
}
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException,
UnsupportedLookAndFeelException {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new TestJFrame().initUI();
}
});
}
}
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