Board.java

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Board implements ActionListener
{
    private JFrame frame;
    private JPanel mainPanel;
    private JPanel gamePanel;
    private JPanel levelPanel;
    private Options options;
    private Squares squares;
    //currentSquare and nextSquare hold positions of the squares user has clicked on, currentNext used to detirmine whether the first square has been selected
    private int currentSquare[];
    private int nextSquare[];
    private int currentNext;

    public Board()
    { 
        //contructor
        currentNext = 0;
        currentSquare = new int[]{0,0};
        nextSquare = new int[]{0,0};
        frame = new JFrame();
        frame.setTitle("Hoppers");
        frame.setSize(800,800);

        squares = new Squares();
        gamePanel = new JPanel();
        gamePanel = squares.getPanel();

        options = new Options();
        levelPanel = new JPanel();
        levelPanel = options.getPanel();

        mainPanel = new JPanel();
        mainPanel.setLayout(new BorderLayout());
        mainPanel.add("Center",gamePanel);
        mainPanel.add("South",levelPanel);

        frame.setContentPane(mainPanel);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);

        
        //Adding action listeners to all buttons
        for (int i=0; i<5; i++) {
            for (int j=0; j< 5;j++){
            squares.getSquare(new int[]{i,j}).getButton().addActionListener(this);
            }
        }

        options.getNextLevelButton().addActionListener(this);
        options.getPreviousLevelButton().addActionListener(this);
        options.getResetButton().addActionListener(this);
        options.getOpenButton().addActionListener(this);
        options.openFile("Levels.txt");

        squares.changeLevel(options.getCurrentLevel());
        options.updateLevelButton();
    
    }

    private void reset()
    {
        //Reset level
        options.inTheProcessOfWinning();
        currentNext = 0;
        squares.changeLevel(options.getCurrentLevel());
    }

    private void nextLevel()
    {
        //Go to next level
        options.inTheProcessOfWinning();
        currentNext = 0;
        options.setLevel(options.getLevel() + 1);
        squares.changeLevel(options.getCurrentLevel());
        options.updateLevelButton();
    }

    private void previousLevel()
    {
        //Go to previous level
        options.inTheProcessOfWinning();
        currentNext = 0;
        options.setLevel(options.getLevel() - 1);
        squares.changeLevel(options.getCurrentLevel());
        options.updateLevelButton();
    }

    private void openLevel()
    {
        //Open level that is typed into text field
        //if user has entered invalid data into text field do nothing
        try {
            options.setLevel(Integer.parseInt(options.getLevelText()) - 1);
            options.inTheProcessOfWinning();
            currentNext = 0;
            squares.changeLevel(options.getCurrentLevel());
            options.updateLevelButton();
        } catch (Exception e) {}
    } 
    private void selectCurrent(int i,int j)
    {   
        //Check if clicked on square is valid starter, if it is select it and update its image, and also store its position in currentSquare, change currentNext so that game knows a sqaure has already been clicked on
        if (squares.getSquare(new int[]{i,j}).validStarter()){
            currentSquare[0] = i;
            currentSquare[1] = j;
            squares.getSquare(currentSquare).setSelected(true);
            squares.getSquare(currentSquare).update();
            currentNext = 1;
        }
    }

    private void selectNext(int i,int j)
    {
        //Check if nextSquare is a valid sqaure to jump to, if it is move, if currentSquare and nextSquare are the same, deselect currentSquare
        nextSquare[0] = i;
        nextSquare[1] = j;
        if (squares.getSquare(nextSquare).validNext()){
            move();
        } else if (currentSquare[0] == nextSquare[0] && currentSquare[1] == nextSquare[1] ){
            currentNext = 0;
            squares.getSquare(currentSquare).setSelected(false);
            squares.getSquare(currentSquare).update();
        }
    }

    private void move()
    {
        //Work out position of square to be jumped over, check whether it a valid jump over, check whether the move is valid, if move is valid move
        int[] midSquare = squares.getMidSquare(currentSquare, nextSquare);
        if (squares.getSquare(midSquare).validMid()){
            if (squares.validMove(currentSquare,nextSquare)){
                squares.getSquare(currentSquare).moveTo( squares.getSquare(nextSquare), squares.getSquare(midSquare));
                currentNext = 0;
                checkWinner();
            }
        }
    }

    private void checkWinner()
    {
        // Loops around all sqaures checking if there is a single green frog
        int total = 0;
        for (int i=0; i<5; i++) {
            for (int j=0; j< 5;j++){
               if (squares.getSquare(new int[]{i,j}).getState() == '2'){
                   total++;
               }
            }
        }
        if (total == 0){
            options.winner();
        }
    }

    public void actionPerformed(ActionEvent e)
    {
        //checks source of all buttons 
        if (e.getSource() == options.getResetButton()){
            reset();
        } else if (e.getSource() == options.getNextLevelButton()) {
            nextLevel();
        } else if (e.getSource() == options.getPreviousLevelButton()) {
            previousLevel();
        }else if (e.getSource() == options.getOpenButton()) {
            openLevel();
        } else {
            for (int i=0; i<5; i++) {
                for (int j=0; j< 5;j++){
                    if (e.getSource() == squares.getSquare(new int[]{i,j}).getButton())
                        if (currentNext == 0){
                            selectCurrent(i, j);;
                        } else { 
                            selectNext(i,j);
                        } 
                        
                    }
            } 
        }
    }


}