gridbaglayout does not resize with the window

[Marcoita_88]

Hello, I have created a jFrame wiith a gridbaglayout, but when I resize the window the child components stay at center of the window. I want the components to resize with the window.
This is the window when created.

and this is the resized window.

As you can see, the child components does NOT resize... I want they resize with the window.
Can someone help me please?

[Fubarable]

Have you set the GridBagConstraint weightx and weighty properties to non-zero values?

[Marcoita_88]

No, for every component weight x and y are set to 0.0.

Here is the initComponents autogenerated code:

/** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        java.awt.GridBagConstraints gridBagConstraints;

        labelImmagine = new javax.swing.JLabel();
        labelNomeCompleto = new javax.swing.JLabel();
        labelStatoChat = new javax.swing.JLabel();
        taMioTesto = new javax.swing.JScrollPane();
        taInviaMessaggi = new javax.swing.JTextArea();
        jScrollPane1 = new javax.swing.JScrollPane();
        teResocontoMessaggi = new javax.swing.JEditorPane();

        setMinimumSize(new java.awt.Dimension(500, 200));
        getContentPane().setLayout(new java.awt.GridBagLayout());

        labelImmagine.setText("Immagine");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.gridheight = 3;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.ipadx = 15;
        gridBagConstraints.ipady = 15;
        getContentPane().add(labelImmagine, gridBagConstraints);

        labelNomeCompleto.setBackground(new java.awt.Color(51, 255, 102));
        labelNomeCompleto.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        labelNomeCompleto.setText("jLabel1");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHEAST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 0, 166);
        getContentPane().add(labelNomeCompleto, gridBagConstraints);

        labelStatoChat.setText("jLabel3");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 0, 166);
        getContentPane().add(labelStatoChat, gridBagConstraints);

        taInviaMessaggi.setColumns(20);
        taInviaMessaggi.setRows(3);
        taInviaMessaggi.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                taInviaMessaggiKeyPressed(evt);
            }
            public void keyReleased(java.awt.event.KeyEvent evt) {
                taInviaMessaggiKeyReleased(evt);
            }
        });
        taMioTesto.setViewportView(taInviaMessaggi);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 4;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.LAST_LINE_END;
        getContentPane().add(taMioTesto, gridBagConstraints);

        jScrollPane1.setMinimumSize(new java.awt.Dimension(80, 100));
        jScrollPane1.setPreferredSize(new java.awt.Dimension(80, 100));

        teResocontoMessaggi.setContentType("text/html");
        teResocontoMessaggi.setEditable(false);
        teResocontoMessaggi.setText("<html>\r\n  <head>\r\n\r    <LINK href=\"http://unknownsite.org/stileChat.css\" rel=\"stylesheet\" type=\"text/css\">\n  </head>\r\n  <body>\r</body>\r\n</html>\r\n");
        jScrollPane1.setViewportView(teResocontoMessaggi);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 3;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.LINE_END;
        getContentPane().add(jScrollPane1, gridBagConstraints);

        pack();
    }// </editor-fold>

[DarrylBurke]

No, for every component weight x and y are set to 0.0.

Well, that explains it

db

[camickr]

See: How to Use GridBagLayout (The Java™ Tutorials > Creating a GUI With JFC/Swing > Laying Out Components Within a Container)

The section on "Specifying Constraints" will explain why you need weightx/weighty.

[Marcoita_88]

Thanks to all, I've solved the problem!

Unless you specify at least one non-zero value for weightx or weighty, all the components clump together in the center of their container. This is because when the weight is 0.0 (the default), the GridBagLayout puts any extra space between its grid of cells and the edges of the container.

Now the resizing behavior of the components is correct. Thanks again.