windowStateChanged(WindowEvent e) function doesn't work!!

Posted on 2008-10-04
Last Modified: 2013-11-23
i have a problem, windowStateChanged(WindowEvent e) simply doesn't get invoked when i resize my window or click on maximize button!!
all the other functions work fine, like windowOnClose, windowIconified...etc. i can't understand what's wrong so it won't invoke.

public void mainImpl() {

    frame = new JFrame(ImageMap.Promoto_Ver);

    frame.getContentPane().setLayout(new BorderLayout());

    frame.getContentPane().add(getDemoPanel(), BorderLayout.CENTER);


    getDemoPanel().setLocation(0, 0);


    frame.addWindowListener(new java.awt.event.WindowAdapter() {


      public void windowStateChanged(WindowEvent e) {

        msg.showMessageDialog(new Frame(), e.getComponent().getClass().getName() + " --- Resized ");    //this never gets invoked no matter what i do with my window!!!! why?        



      public void windowClosing(WindowEvent e) {

        if (Drw_pro.prozessID != 0) {

          if (Drw_pro.spremenjeno) {

            int odg = msg.showConfirmDialog(new Frame(),

                                            ImageMap.GetText(132) + " " +

                                            Drw_pro.pro_name + "?",



                                            msg.QUESTION_MESSAGE, msg.getIcon());

            if (odg == msg.YES_OPTION) {

              try {



              catch (Exception ex) {}


            else if (odg == msg.CANCEL_OPTION) {

              //Drw_pro.spremenjeno = false;



            else if (odg == msg.NO_OPTION) {

              try {




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Question by:spartanac86
LVL 17

Accepted Solution

Dejan Pažin earned 250 total points
ID: 22643665

windowStateChanged does not listen for resize changes. You need ComponentListener for that, here is a tutorial:

And here is tutorial for the state listener:

Author Comment

ID: 22645450
i should have only changed ...frame.addWindowListener... to ...frame.addWindowStateListener...
and it would have worked fine for minimizing/maximizing, but for resizing i think i'll need to use component listener.
Class Window inherits Component, right?

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