Trying to scroll a JComponent with JScrollPane but can't do it. :(

Question

Hi, what im trying to do seems to be simple but I gave up after trying the whole day and I beg you guys help.
I created a JComponent that is my map ( the map consists only in squared cells ). but the map might be too big for the screen, so I want to be able to scroll it. If the map is smaller than the screen,
everything works perfect, i just add the map to the frame container and it shows perfect. But if I add the map to the ScrollPane and them add the ScrollPane to the container, it doesnt work.
below is the code for both classes Map and the MainWindow. Thanks in advance
package main;
import java.awt.Color;
import java.awt.event.WindowEvent;
import java.awt.event.WindowStateListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JViewport;
public class MainWindow implements WindowStateListener {
     private JFrame frame;
     private static MainWindow instance = null;
     private MenuBar menu;
     public Map map = new Map();
     public JScrollPane Scroller =
          new JScrollPane( map,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS );
     public JViewport viewport = new JViewport();
     private MainWindow(int width, int height) {
          frame = new JFrame("Editor de Cen�rios v1.0");
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.setSize(width,height);
          frame.setVisible(true);
          menu = MenuBar.createMenuBar();
          JFrame.setDefaultLookAndFeelDecorated(false);
          frame.setJMenuBar(menu.create());
          frame.setBackground(Color.WHITE);
          frame.getContentPane().setBackground(Color.WHITE);
                                // HERE IS THE PROBLEM, THIS DOESNT WORKS   <---------------------------------------------------------------------------------------
          frame.getContentPane().add(Scroller);
          frame.addWindowStateListener(this);
public static MainWindow createMainWindow(int width, int height)
     if(instance == null)
          instance = new MainWindow(width,height);
          return instance;               
     else
          return instance;
public static MainWindow returnMainWindow()
     return instance;
public static void main(String[] args) {
     MainWindow mWindow = createMainWindow(800,600);
public JFrame getFrame() {
     return frame;
public Map getMap(){
     return map;
@Override
public void windowStateChanged(WindowEvent arg0) {
     map.repaint();
package main;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import javax.swing.JComponent;
import javax.swing.Scrollable;
public class Map extends JComponent  implements Scrollable{
     private Cell [] mapCells;
     private String mapPixels;
     private String mapAltura;
     private String mapLargura;
     public void createMap(String pixels , String altura, String largura)
          mapPixels = pixels;
          mapAltura = altura;
          mapLargura = largura;
          int cells = Integer.parseInt(altura) * Integer.parseInt(largura);
          mapCells = new Cell[cells];
          //MainWindow.returnMainWindow().getFrame().getContentPane().add(this);
          Graphics2D grafico = (Graphics2D)getGraphics();
          for(int i=0, horiz = 0 , vert = 0; i < mapCells.length; i++)
               mapCells[i] = new Cell( horiz, vert,Integer.parseInt(mapPixels));
               MainWindow.returnMainWindow().getFrame().getContentPane().add(mapCells);
               grafico.draw(mapCells[i].r);
               horiz = horiz + Integer.parseInt(mapPixels);
               if(horiz == Integer.parseInt(mapLargura)*Integer.parseInt(mapPixels))
                    horiz = 0;
                    vert = vert + Integer.parseInt(mapPixels);
          repaint();
     @Override
     protected void paintComponent(Graphics g) {
          super.paintComponent(g);
          System.out.println("entrou");
          Graphics2D g2d = (Graphics2D)g;
          if(mapCells !=null)
               for(int i=0, horiz = 0 , vert = 0; i < mapCells.length; i++)
                    g2d.draw(mapCells[i].r);
                    horiz = horiz + Integer.parseInt(mapPixels);
                    if(horiz == Integer.parseInt(mapLargura)*Integer.parseInt(mapPixels))
                         horiz = 0;
                         vert = vert + Integer.parseInt(mapPixels);
     @Override
     public Dimension getPreferredScrollableViewportSize() {
          return super.getPreferredSize();
     @Override
     public int getScrollableBlockIncrement(Rectangle visibleRect,
               int orientation, int direction) {
          // TODO Auto-generated method stub
          return 5;
     @Override
     public boolean getScrollableTracksViewportHeight() {
          // TODO Auto-generated method stub
          return false;
     @Override
     public boolean getScrollableTracksViewportWidth() {
          // TODO Auto-generated method stub
          return false;
     @Override
     public int getScrollableUnitIncrement(Rectangle visibleRect,
               int orientation, int direction) {
          // TODO Auto-generated method stub
          return 5;

Answer 1

Im so sorry Darryl here are the other 3 classes
package main;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.filechooser.FileNameExtensionFilter;
public class MenuActions {
     public void newMap(){
          final JTextField pixels = new JTextField(10);
          final JTextField hCells = new JTextField(10);
          final JTextField wCells = new JTextField(10);
          JButton btnOk = new JButton("OK");
          final JFrame frame = new JFrame("Escolher dimens�es do mapa");
          frame.getContentPane().setLayout(new BoxLayout(frame.getContentPane(),BoxLayout.Y_AXIS));
          btnOk.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
          String txtPixels = pixels.getText();
          String hTxtCells = hCells.getText();
          String wTxtCells = wCells.getText();
          frame.dispose();
          MainWindow.returnMainWindow().map.createMap(txtPixels,hTxtCells,wTxtCells);         
          frame.getContentPane().add(new JLabel("N�mero de pixels em cada c�lula:"));
          frame.getContentPane().add(pixels);
          frame.getContentPane().add(new JLabel("Altura do mapa (em c�lulas):"));
          frame.getContentPane().add(hCells);
          frame.getContentPane().add(new JLabel("Largura do mapa (em c�lulas):"));
          frame.getContentPane().add(wCells);
          frame.getContentPane().add(btnOk);
          frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
          frame.setSize(300, 165);
          frame.setResizable(false);
         frame.setVisible(true);
     public Map openMap (){
          //Abre somente arquivos XML
          JFileChooser fc = new JFileChooser();
          FileNameExtensionFilter filter = new FileNameExtensionFilter("XML file", "xml" );
          fc.addChoosableFileFilter(filter);
          fc.showOpenDialog(MainWindow.returnMainWindow().getFrame());
          //TO DO: manipular o mapa aberto
          return new Map();          
     public void save(){
     public void saveAs(){
          //Abre somente arquivos XML
          JFileChooser fc = new JFileChooser();
          FileNameExtensionFilter filter = new FileNameExtensionFilter("XML file", "xml" );
          fc.addChoosableFileFilter(filter);
          fc.showSaveDialog(MainWindow.returnMainWindow().getFrame());
          //TO DO: Salvar o mapa aberto
     public void exit(){
          System.exit(0);          
     public void copy(){
     public void paste(){
package main;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;
public class MenuBar implements ActionListener{
     private JMenuBar menuBar;
     private final Color color = new Color(250,255,245);
     private String []menuNames = {"Arquivo","Editar"};
     private JMenu []menus = new JMenu[menuNames.length];
     private String []arquivoMenuItemNames = {"Novo","Abrir", "Salvar","Salvar Como...","Sair" };
     private KeyStroke []arquivoMenuItemHotkeys = {KeyStroke.getKeyStroke(KeyEvent.VK_N,ActionEvent.CTRL_MASK),
                                                              KeyStroke.getKeyStroke(KeyEvent.VK_A,ActionEvent.CTRL_MASK),
                                                              KeyStroke.getKeyStroke(KeyEvent.VK_S,ActionEvent.CTRL_MASK),
                                                              KeyStroke.getKeyStroke(KeyEvent.VK_S,ActionEvent.SHIFT_MASK),
                                                              KeyStroke.getKeyStroke(KeyEvent.VK_F4,ActionEvent.ALT_MASK)};
     private JMenuItem []arquivoMenuItens = new JMenuItem[arquivoMenuItemNames.length];
     private String []editarMenuItemNames = {"Copiar","Colar"};
     private KeyStroke []editarMenuItemHotKeys = {KeyStroke.getKeyStroke(KeyEvent.VK_C,ActionEvent.CTRL_MASK),
                                                             KeyStroke.getKeyStroke(KeyEvent.VK_V,ActionEvent.CTRL_MASK)};
     private JMenuItem[]editarMenuItens = new JMenuItem[editarMenuItemNames.length];
     private static MenuBar instance = null;
     public JMenuItem lastAction;
     private MenuBar()
     public static MenuBar createMenuBar()
          if(instance == null)
               instance = new MenuBar();
               return instance;                    
          else
               return instance;
     public JMenuBar create()
          //cria a barra de menu
          menuBar = new JMenuBar();
          //adiciona items a barra de menu
          for(int i=0; i < menuNames.length ; i++)
               menus[i] = new JMenu(menuNames);
               menuBar.add(menus[i]);
          //seta a hotkey da barra como F10
          menus[0].setMnemonic(KeyEvent.VK_F10);
          //adiciona items ao menu arquivo
          for(int i=0; i < arquivoMenuItemNames.length ; i++)
               arquivoMenuItens[i] = new JMenuItem(arquivoMenuItemNames[i]);
               arquivoMenuItens[i].setAccelerator(arquivoMenuItemHotkeys[i]);
               menus[0].add(arquivoMenuItens[i]);
               arquivoMenuItens[i].setBackground(color);
               arquivoMenuItens[i].addActionListener(this);
          //adiciona items ao menu editar
          for(int i=0; i < editarMenuItemNames.length ; i++)
               editarMenuItens[i] = new JMenuItem(editarMenuItemNames[i]);
               editarMenuItens[i].setAccelerator(editarMenuItemHotKeys[i]);
               menus[1].add(editarMenuItens[i]);
               editarMenuItens[i].setBackground(color);
               editarMenuItens[i].addActionListener(this);
          menuBar.setBackground(color);
          return menuBar;                    
     @Override
     public void actionPerformed(ActionEvent e) {
          lastAction = (JMenuItem) e.getSource();
          MenuActions action = new MenuActions();
          if(lastAction.getText().equals("Novo"))
               action.newMap();
          else if(lastAction.getText().equals("Abrir"))
               action.openMap();
          else if(lastAction.getText().equals("Salvar"))
               action.save();               
          else if(lastAction.getText().equals("Salvar Como..."))
               action.saveAs();               
          else if(lastAction.getText().equals("Sair"))
               action.exit();               
          else if(lastAction.getText().equals("Copiar"))
               action.copy();               
          else if(lastAction.getText().equals("Colar"))
               action.paste();               
package main;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
public class Cell extends JComponent{
     public float presSub = 0;
     public double errPressInfer = 0.02;
     public double errPressSup = 0.02;
     public float profundidade = 1;
     public Rectangle2D r ;
     public Cell(double x, double y, double pixel)
          r = new Rectangle2D.Double(x,y,pixel,pixel);          
Edited by: xnunes on May 3, 2008 6:26 AM