JPanel like JDialog

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  • aleplgr
    New Member
    • Aug 2007
    • 19
    #1

    JPanel like JDialog

    Hello, in this code suppose that the dlg is defined in one case as a JDialog, I run it and it seems that the JDialog is executed AFTER closing it, so the message is printed after closing the JDialog.
    But when I run the code with dlg defined as JPanel it prints the message before I close the JPanel.

    Code:
    jmnuTest.addActionListener(
         new ActionListener()
         {
            public void actionPerformed(ActionEvent e)
            {
               jmnuTest_actionPerformed(e);
            }
         });

    Code:
    private void jmnuTest_actionPerformed(ActionEvent e)
   {
      Testwhen dlg = new Testwhen(this);
     System.out.println("I'm here");
      
   }


    And I need the JPanel to behave like the JDialog in that sense.. how could I deal with this?
    Thanks in advance
    Tags: close jpanel, jpanel modality
    • Nepomuk
      Recognized Expert Specialist
      • Aug 2007
      • 3111
      #2
      Originally posted by aleplgr
      Hello, in this code suppose that the dlg is defined in one case as a JDialog, I run it and it seems that the JDialog is executed AFTER closing it, so the message is printed after closing the JDialog.
      But when I run the code with dlg defined as JPanel it prints the message before I close the JPanel.

      [CODE=java]jmnuTest.addAct ionListener(
      new ActionListener( )
      {
      public void actionPerformed (ActionEvent e)
      {
      jmnuTest_action Performed(e);
      }
      });[/CODE]


      [CODE=java]private void jmnuTest_action Performed(Actio nEvent e)
      {
      Testwhen dlg = new Testwhen(this);
      System.out.prin tln("I'm here");

      }[/CODE]



      And I need the JPanel to behave like the JDialog in that sense.. how could I deal with this?
      Thanks in advance
      Is your JDialog modal? If so, that would explain the behavior. It will not continue doing anything as long as the JDialog is visible - you will have to switch it to nonmodal.
      [CODE=java]dlg.setModal(fa lse);[/CODE]

        Comment

        • aleplgr
          New Member
          • Aug 2007
          • 19
          #3
          Thanks, then as I understand I need the JPanel to be modal, the JDialog is modal and that's why it shows the message after closing it. The JPanel is not modal and that's why it does not wait until I close it to print the message.
          So as I understand I should have to make the JPanel modal, but dlg.setModal(tr ue) is not defined when dlg is a JPanel...

            Comment

            • Nepomuk
              Recognized Expert Specialist
              • Aug 2007
              • 3111
              #4
              Originally posted by aleplgr
              Thanks, then as I understand I need the JPanel to be modal, the JDialog is modal and that's why it shows the message after closing it. The JPanel is not modal and that's why it does not wait until I close it to print the message.
              So as I understand I should have to make the JPanel modal, but dlg.setModal(tr ue) is not defined when dlg is a JPanel...
              No, you misunderstood.
              JPanels can't be modal. Modal means, that it is in the foreground and nothing else can be accessed. If you want the JDialog to act like the JPanel, you have to switch the JDialog to nonmodal. If you want a JPanel to act like it was modal, you'll have to write that yourself.

                Comment

                • JosAH
                  Recognized Expert MVP
                  • Mar 2007
                  • 11453
                  #5
                  Note that since Java 1.5. (or 1.6, I don't remember) there are more levels of
                  modality to pick from than just (non)modal; check the JDialog API documenation
                  for the details.

                  kind regards,

                  Jos

                    Comment

                    • aleplgr
                      New Member
                      • Aug 2007
                      • 19
                      #6
                      But the JPanel prints the message "I'm here" before closing it
                      and the JDialog prints the message after closing it.
                      I need the JPanel to print the message after closing it, how could I do that?

                        Comment

                        • JosAH
                          Recognized Expert MVP
                          • Mar 2007
                          • 11453
                          #7
                          Originally posted by aleplgr
                          But the JPanel prints the message "I'm here" before closing it
                          and the JDialog prints the message after closing it.
                          I need the JPanel to print the message after closing it, how could I do that?
                          How do you 'close' a JPanel? Al you can do with it is remove it from its container,
                          but that's about it. If you want some modality in your application, i.e. a use is
                          only allowed to work with a particular piece of your appliation, use a modal dialog.
                          A JDialog is a top level container (like a window) while a JPanel is just part of
                          another (possibly top level) container.

                          kind regards,

                          Jos

                            Comment

                            • Nepomuk
                              Recognized Expert Specialist
                              • Aug 2007
                              • 3111
                              #8
                              Originally posted by aleplgr
                              But the JPanel prints the message "I'm here" before closing it
                              and the JDialog prints the message after closing it.
                              I need the JPanel to print the message after closing it, how could I do that?
                              In that case, you should add a listener to the JPanel which is activated, when the Panel is closed (e.g. made invisible). You could have a while-loop, which stops the program from doing anything else until it gets some kind of message from the listener.

                                Comment

                                • aleplgr
                                  New Member
                                  • Aug 2007
                                  • 19
                                  #9
                                  I've been thinking the first solution: to define it as a JDialog.
                                  And now it works fine, but I need to add everything else (buttons, labels, functionality) from the JPanel to the JDialog.
                                  I tried the setContentPane to "copy" everything from the JPanel to the JDialog but it's not working...It shows the JDialog as if I had done nothing...

                                  Code:
                                  private JPanel contentPane;
 
dlg = new MyDialog(this);
pnl =  new MyPanel (this);
dlg.setContentPane(pnl);
contentPane.add(dlg,  BorderLayout.CENTER);

                                    Comment

                                    • JosAH
                                      Recognized Expert MVP
                                      • Mar 2007
                                      • 11453
                                      #10
                                      Originally posted by aleplgr
                                      I've been thinking the first solution: to define it as a JDialog.
                                      And now it works fine, but I need to add everything else (buttons, labels, functionality) from the JPanel to the JDialog.
                                      I tried the setContentPane to "copy" everything from the JPanel to the JDialog but it's not working...It shows the JDialog as if I had done nothing...

                                      Code:
                                      private JPanel contentPane;
 
dlg = new MyDialog(this);
pnl =  new MyPanel (this);
dlg.setContentPane(pnl);
contentPane.add(dlg,  BorderLayout.CENTER);
                                      It doesn't work like that; forget about that JPanel and add all the components to
                                      the content pane of the JDialog instead. Don't be afraid to throw away incorrect
                                      code and don't try to hack it a bit more; change it so that everything is correct.

                                      kind regards,

                                      Jos

                                        Comment

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