hay dos posibles cuestiones
JOptionPane se llama fuera de EDT, entonces sólo la barra de herramientas (leyenda que venía de sistema operativo nativo es visible en la pantalla, RootPane no es visible) es visible en la pantalla
allí se puede para probar las características de JOptionPanes, donde JOptionPane.showInternalMessageDialog() crea problemas en todos los casos que ERE es otro JDialog con setModal (verdadero), verdadera razón de que no sé, el mismo debe ser con ModalityTypes
- no
posible que muestra dos JOptionPanes en la pantalla al mismo tiempo código
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Toolkit;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import javax.swing.JDialog;
import javax.swing.JOptionPane;
import javax.swing.JRootPane;
import javax.swing.Timer;
//http://stackoverflow.com/questions/8670297/make-java-swing-modal-dialog-behave-like-mac-osx-dialogs
public class ModalDialogDemoFrame extends JFrame {
private static final long serialVersionUID = 1L;
private ModalDialogDemoFrame modalDialogDemo;
public ModalDialogDemoFrame() {
modalDialogDemo = this;
setBounds(100, 100, 400, 400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton buttonDialog = new JButton("Open Dialog");
buttonDialog.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
// Create a Modal Dialog with this Frame as Parent.
ModalDialog modalDialog = new ModalDialog(modalDialogDemo, true);
modalDialog.setVisible(true);
}
});
getContentPane().add(buttonDialog, BorderLayout.CENTER);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
ModalDialogDemoFrame window = new ModalDialogDemoFrame();
window.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
//http://stackoverflow.com/questions/4577424/distinguish-between-a-single-click-and-a-double-click-in-java/4577475#4577475
class ClickListener extends MouseAdapter implements ActionListener {
private final static int clickInterval = (Integer) Toolkit.getDefaultToolkit().getDesktopProperty("awt.multiClickInterval");
private MouseEvent lastEvent;
private Timer timer;
public ClickListener() {
this(clickInterval);
}
public ClickListener(int delay) {
timer = new Timer(delay, this);
}
@Override
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() > 2) {
return;
}
lastEvent = e;
if (timer.isRunning()) {
timer.stop();
doubleClick(lastEvent);
} else {
timer.restart();
}
}
@Override
public void actionPerformed(ActionEvent e) {
timer.stop();
singleClick(lastEvent);
}
public void singleClick(MouseEvent e) {
}
public void doubleClick(MouseEvent e) {
}
}
class ModalDialog extends JDialog {
private static final long serialVersionUID = 1L;
public ModalDialog(JFrame parent, boolean modal) {
Dimension dimensionParentFrame = parent.getSize();
setSize(new Dimension((parent == null) ? 300 : dimensionParentFrame.width/2, 75));
Dimension dimensionDialog = getSize();
int x = parent.getX() + ((dimensionParentFrame.width - dimensionDialog.width)/2);
setLocation(x, parent.getY() + parent.getInsets().top);
//setUndecorated(true);
setModal(modal);
//setUndecorated(true);
//getRootPane().setWindowDecorationStyle(JRootPane.ERROR_DIALOG);
setModalityType(ModalityType.APPLICATION_MODAL);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
final JButton buttonClose = new JButton("Close");
buttonClose.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//ok
/*JOptionPane.showMessageDialog(buttonClose,
"Eggs are not supposed to be green.",
"Inane warning",
JOptionPane.WARNING_MESSAGE);*/
//uncomment for un_handled GUI, JOptionPane is behing JFrame I think....
/*JOptionPane.showInternalMessageDialog(buttonClose,
"Eggs are not supposed to be green.",
"Inane warning",
JOptionPane.WARNING_MESSAGE);*/
//ok
/*JOptionPane.showConfirmDialog(buttonClose,
"Eggs are not supposed to be green.",
"Inane warning",
JOptionPane.WARNING_MESSAGE);*/
//ok
/*JOptionPane.showMessageDialog(null,
"Eggs are not supposed to be green.",
"Inane warning",
JOptionPane.WARNING_MESSAGE);*/
//uncomment for un_handled GUI
//Exception occurred during event dispatching:
//java.lang.RuntimeException: JOptionPane: parentComponent does not have a valid parent
/*JOptionPane.showInternalMessageDialog(null,
"Eggs are not supposed to be green.",
"Inane warning",
JOptionPane.WARNING_MESSAGE);*/
//ok
JOptionPane.showConfirmDialog(null,
"Eggs are not supposed to be green.",
"Inane warning",
JOptionPane.WARNING_MESSAGE);
dispose();
}
});
add(buttonClose, BorderLayout.CENTER); // comment for listening
addMouseListener(new ClickListener() {
@Override
public void singleClick(MouseEvent e) {
System.out.println("single");
}
@Override
public void doubleClick(MouseEvent e) {
System.out.println("double");
}
});
}
}
simplemente pasan a la matriz como un argumento, en lugar de 'JPanel', que sea el contenedor principal, es decir' JFrame', entonces realmente no tiene que preocuparse por tales cosas :-) –
* "a veces en mi llamada de clase de acción a este método con parámetros nulos como a continuación." * ¿Por qué 'null'? –
Porque llamo a este método en el cuerpo de una clase que no tiene referencia a GUI o marco. – itro