JApplet

[Dean Kiely]

Hi I have a main JPanel with 5 JPanels on this 'main' jpanel i want one panel to control the rest as it is a game and i need one manager panel. I am trying to use the paintcomponent to try and draw onto each panel but i am only getting a small box appearing, what is the problem here does anyone know?
Is it possible to create a class for 3 jpanels i need to draw stuff on then create an instance of these classes and add to relevant jpanel to run the code and display the paintcomponents?
Hope this all makes sense!
Many thanks.

[Korol Bloom]

do you have some code?
, korol

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.util.*;
import java.util.List;
import javax.swing.*;
import javax.swing.event.*;
 
public class GameDemo
{
    public static void main(String[] args)
    {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new GameBoard());
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}
 
class GameBoard extends JPanel
{
    final int
        CIRCLE = 0,
        SQUARE = 1;
    List tokenList;
 
    public GameBoard()
    {
        setLayout(null);
        tokenList = new ArrayList();
        addGamePieces();
        setBackground(Color.white);
        GameAction action = new GameAction(this);
        addMouseListener(action);
        addMouseMotionListener(action);
    }
 
    private void addGamePieces()
    {
        GamePiece
            piece1 = new GamePiece(40, 50, Color.red, CIRCLE),
            piece2 = new GamePiece(120, 280, Color.blue, SQUARE),
            piece3 = new GamePiece(300, 190, Color.green, CIRCLE),
            piece4 = new GamePiece(240, 100, Color.orange, SQUARE);
        add(piece1);
        add(piece2);
        add(piece3);
        add(piece4);
        tokenList.add(piece1);
        tokenList.add(piece2);
        tokenList.add(piece3);
        tokenList.add(piece4);
    }
 
    public List getList()
    {
        return tokenList;
    }
}
 
class GamePiece extends JPanel
{
    RectangularShape r;
    Color color, bgColor, selectedColor;
    boolean isSelected;
    int type;
    final int
        CIRCLE = 0,
        SQUARE = 1;
    int side, dia;
 
    public GamePiece(int x, int y, Color c, int type)
    {
        color = c;
        this.type = type;
        side = 50;
        dia = side*4/5;
        bgColor = new Color(128, 128, 255);
        selectedColor = Color.red;
        isSelected = false;
        setBounds(x, y, side, side);
    }
 
    protected void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        int width = getWidth();
        int height = getHeight();
        g2.setPaint(color);
        if(r == null)
            initializeShape(width/2, height/2);
        if(isSelected)
            g2.setPaint(selectedColor);
        else
            g2.setPaint(bgColor);
        g2.fillRect(0, 0, width, height);
        g2.setPaint(color);
        g2.fill(r);
    }
 
    private void initializeShape(int x, int y)
    {
        if(type == CIRCLE)
            r = new Ellipse2D.Double(x - dia/2, y - dia/2, dia, dia);
        else
            r = new Rectangle2D.Double(x - dia/2, y - dia/2, dia, dia);
    }
 
    public void setSelected(boolean b)
    {
        isSelected = b;
        repaint();
    }
}
 
class GameAction extends MouseInputAdapter
{
    GameBoard gameBoard;
    GamePiece selectedPiece;
    Point offset;
    boolean dragging;
 
    public GameAction(GameBoard gb)
    {
        gameBoard = gb;
        offset = new Point();
        dragging = false;
    }
 
    public void mousePressed(MouseEvent e)
    {
        Point p = e.getPoint();
        List list = gameBoard.getList();
        GamePiece piece;
        for(int i = 0; i < list.size(); i++)
        {
            piece = (GamePiece)list.get(i);
            Rectangle r = piece.getBounds();
            if(r.contains(p))
            {
                selectedPiece = piece;
                selectedPiece.setSelected(true);
                offset.x = p.x - r.x;
                offset.y = p.y - r.y;
                dragging = true;
                break;
            }
        }
    }
 
    public void mouseReleased(MouseEvent e)
    {
        dragging = false;
        selectedPiece.setSelected(false);
    }
 
    public void mouseDragged(MouseEvent e)
    {
        if(dragging)
        {
            Point end = e.getPoint();
            Dimension d = selectedPiece.getSize();
            selectedPiece.setBounds(end.x - offset.x,
                                    end.y - offset.y, d.width, d.height);
            gameBoard.repaint();
        }
    }
}