Dynamic Jpanel

[Tae Kim]

OK I am taking the original post out and substituting it with this simpler problem. If you look at the code, you will see in the buildMainPanel() all I am trying to do is to create a new panel in the main container. But obciously there is this scope issue how can I get rid of this problem?

package desktopapplication2;

import java.awt.*;
import java.awt.event.*;
import java.awt.font.*;
import java.awt.image.BufferedImage;
import javax.swing.*;

public class Test {

    public static void main(String[] args) {

        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        final Container contentPane = f.getContentPane();

        GridBagLayout layout = new GridBagLayout();
        contentPane.setLayout(layout);
        final GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(10, 0, 5, 0);
        gbc.weightx = 1.0;
        gbc.fill = gbc.HORIZONTAL;
        gbc.gridwidth = gbc.REMAINDER;

        CollapsablePanel cp1 = new CollapsablePanel("Main Queue", buildMainPanel());
        //gbc.insets = new Insets(10, 0, 5, 0);
        contentPane.add(cp1, gbc);

        JButton j = new JButton("IOI");

        j.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                CollapsablePanel cp4 = new CollapsablePanel("test4", buildPanel());
                contentPane.add(cp4, gbc);
                contentPane.validate();
                contentPane.repaint();
            }
        });
        contentPane.add(j, gbc);


        f.setSize(360, 500);
        f.setLocation(200, 100);
        f.setVisible(true);



    }
    // Building the Main Panel

    public static JPanel buildMainPanel() {
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(5, 5, 5, 5);
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;

        JPanel p1 = new JPanel(new GridBagLayout());

        [COLOR=Red]JButton bt1 = new JButton(new ImageIcon("/Users/sha33/NetBeansProjects/DesktopApplication2/src/desktopapplication2/r1.jpg"));
        p1.add(bt1, gbc);
        bt1.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                CollapsablePanel cp4 = new CollapsablePanel("test4", buildPanel());
                contentPane.add(cp4, gbc);
                contentPane.validate();
                contentPane.repaint();
            }
        });[/COLOR]


        JButton bt2 = new JButton(new ImageIcon("/Users/sha33/NetBeansProjects/DesktopApplication2/src/desktopapplication2/r2.jpg"));
        p1.add(bt2, gbc);

        JButton bt3 = new JButton(new ImageIcon("/Users/sha33/NetBeansProjects/DesktopApplication2/src/desktopapplication2/r3.jpg"));
        p1.add(bt3, gbc);


        return p1;
    }

    public static JPanel buildPanel() {
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(2, 1, 2, 1);
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;

        JPanel p1 = new JPanel(new GridBagLayout());
        gbc.gridwidth = gbc.RELATIVE;
        p1.add(new JButton("button 1"), gbc);
        gbc.gridwidth = gbc.REMAINDER;
        p1.add(new JButton("button 2"), gbc);
        gbc.gridwidth = gbc.RELATIVE;
        p1.add(new JButton("button 3"), gbc);
        gbc.gridwidth = gbc.REMAINDER;
        p1.add(new JButton("button 4"), gbc);
        ;

        return p1;
    }
}

class CollapsablePanel extends JPanel {

    private boolean selected;
    JPanel contentPanel_;
    HeaderPanel headerPanel_;

    private class HeaderPanel extends JPanel implements MouseListener {

        String text_;
        Font font;
        BufferedImage open, closed;
        final int OFFSET = 30, PAD = 5;

        public HeaderPanel(String text) {
            addMouseListener(this);
            text_ = text;
            font = new Font("sans-serif", Font.PLAIN, 12);
            // setRequestFocusEnabled(true);
            setPreferredSize(new Dimension(200, 20));
            int w = getWidth();
            int h = getHeight();

            /*try {
            open = ImageIO.read(new File("images/arrow_down_mini.png"));
            closed = ImageIO.read(new File("images/arrow_right_mini.png"));
            } catch (IOException e) {
            e.printStackTrace();
            }*/

        }

        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2 = (Graphics2D) g;
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                    RenderingHints.VALUE_ANTIALIAS_ON);
            int h = getHeight();
            /*if (selected)
            g2.drawImage(open, PAD, 0, h, h, this);
            else
            g2.drawImage(closed, PAD, 0, h, h, this);
             */ // Uncomment once you have your own images
            g2.setFont(font);
            FontRenderContext frc = g2.getFontRenderContext();
            LineMetrics lm = font.getLineMetrics(text_, frc);
            float height = lm.getAscent() + lm.getDescent();
            float x = OFFSET;
            float y = (h + height) / 2 - lm.getDescent();
            g2.drawString(text_, x, y);
        }

        public void mouseClicked(MouseEvent e) {
            toggleSelection();
        }

        public void mouseEntered(MouseEvent e) {
        }

        public void mouseExited(MouseEvent e) {
        }

        public void mousePressed(MouseEvent e) {
        }

        public void mouseReleased(MouseEvent e) {
        }
    }

    public CollapsablePanel(String text, JPanel panel) {
        super(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.insets = new Insets(1, 3, 0, 3);
        gbc.weightx = 1.0;
        gbc.fill = gbc.HORIZONTAL;
        gbc.gridwidth = gbc.REMAINDER;

        selected = false;
        headerPanel_ = new HeaderPanel(text);

        setBackground(new Color(200, 200, 220));
        contentPanel_ = panel;

        add(headerPanel_, gbc);
        add(contentPanel_, gbc);
        contentPanel_.setVisible(false);

        JLabel padding = new JLabel();
        gbc.weighty = 1.0;
        add(padding, gbc);

    }

    public void toggleSelection() {
        selected = !selected;

        if (contentPanel_.isShowing()) {
            contentPanel_.setVisible(false);
        } else {
            contentPanel_.setVisible(true);
        }

        validate();

        headerPanel_.repaint();
    }
}

[Tae Kim]

Any takers ??

[Rob Spoor]

PatienceIsAVirtue.

[Michael Dunn]

pass a reference

//CollapsablePanel cp1 = new CollapsablePanel("Main Queue", buildMainPanel());
CollapsablePanel cp1 = new CollapsablePanel("Main Queue", buildMainPanel(contentPane));

//public static JPanel buildMainPanel() {
public static JPanel buildMainPanel(final Container contentPane) {