src/de/uapcore/sudoku/Field.java

/*
 * Copyright 2013 Mike Becker. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package de.uapcore.sudoku;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.image.BufferedImage;
import javax.swing.JPanel;

/**
 *
 * @author mike
 */
public final class Field extends JPanel {
    private SudokuTextField[][] cells;
    
    public Field() {
        setBackground(Color.WHITE);
        
        setLayout(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();
        c.insets = new Insets(5, 5, 5, 5);
        
        cells = new SudokuTextField[9][9];
        for (int x = 0 ; x < 9 ; x++) {
            for (int y = 0 ; y < 9 ; y++) {
                cells[x][y] = new SudokuTextField();
                c.gridx = x;
                c.gridy = y;
                add(cells[x][y], c);
            }
        }
    }

    @Override
    public void paint(Graphics graphics) {
        final int w = getWidth();
        final int h = getHeight();
        final int cw = w / 9;
        final int ch = h / 9;
        
        BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
        Graphics2D g = img.createGraphics();
        g.setBackground(Color.WHITE);
        g.clearRect(0, 0, w, h);
        
        g.setColor(Color.BLACK);
        g.drawRect(1, 1, w-2, h-2);
        g.drawRect(2, 2, w-4, h-4);
        for (int x = cw ; x < w ; x += cw) {
            for (int y = ch ; y < h ; y += ch) {
                g.drawLine(x, 2, x, h-2);
                g.drawLine(2, y, w-2, y);
                if ((x / cw) % 3 == 0) {
                    g.drawLine(x+1, 2, x+1, h-2);
                }
                if ((y / ch) % 3 == 0) {
                    g.drawLine(2, y+1, w-2, y+1);
                }
            }
        }
        
        graphics.drawImage(img, 0, 0, this);
        super.paintChildren(graphics);
    }
    
    public boolean isCellEmpty(int x, int y) {
        return getCellValue(x, y) == 0;
    }
    
    public int getCellValue(int x, int y) {
        return cells[x][y].getValue();
    }
    
    public void setCellValue(int x, int y, int v) {
        cells[x][y].setValue(v);
    }
    
    public void clearCellValue(int x, int y) {
        setCellValue(x, y, 0);
    }
    
    public void setCellModified(int x, int y, boolean modified) {
        cells[x][y].setModified(modified);
    }
    
    public void setAllCellsModified(boolean modified) {
        for (int x = 0 ; x < 9 ; x++) {
            for (int y = 0 ; y < 9 ; y++) {
                cells[x][y].setModified(modified);
            }
        }
    }
    
    public boolean isAnyCellModified() {
        for (int x = 0 ; x < 9 ; x++) {
            for (int y = 0 ; y < 9 ; y++) {
                if (cells[x][y].isModified()) {
                    return true;
                }
            }
        }
        return false;
    }
    
    public void clear() {
        for (int x = 0 ; x < 9 ; x++) {
            for (int y = 0 ; y < 9 ; y++) {
                cells[x][y].setValue(0);
            }
        }
    }
    
    public int[][] getSquare(int x, int y) {
        if (x < 0 || x > 2 || y < 0 || y > 2) {
            throw new IllegalArgumentException("Invalid square coordinates");
        }
        int[][] square = new int[3][3];
        
        for (int u = 0 ; u < 3 ; u++) {
            for (int v = 0 ; v < 3 ; v++) {
                square[u][v] = getCellValue(3*x+u, 3*y+v);
            }
        }
        
        return square;
    }
    
    public int[] getRow(int y) {
        if (y < 0 || y > 8) {
            throw new IllegalArgumentException("Invalid row number");
        }
        int row[] = new int[9];
        
        for (int x = 0 ; x < 9 ; x++) {
            row[x] = getCellValue(x, y);
        }
        
        return row;
    }
    
    public int[] getColumn(int x) {
        if (x < 0 || x > 8) {
            throw new IllegalArgumentException("Invalid column number");
        }
        int column[] = new int[9];
        
        for (int y = 0 ; y < 9 ; y++) {
            column[y] = getCellValue(x, y);
        }
        
        return column;
    }
}