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fltk/test/sudoku.cxx
Michael R Sweet bed8043ef2 Add sound design notes. 
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@4688 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
2005-12-06 18:59:21 +00:00

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//
// "$Id$"
//
// Sudoku game using the Fast Light Tool Kit (FLTK).
//
// Copyright 2005 by Michael Sweet.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
#include <FL/Fl.H>
#include <FL/Enumerations.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Group.H>
#include <FL/fl_ask.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Help_Dialog.H>
#include <FL/Fl_Preferences.H>
#include <FL/Fl_Sys_Menu_Bar.H>
#include <FL/x.H>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <FL/math.h>
#ifdef WIN32
# include "sudokurc.h"
#elif !defined(__APPLE__)
# include "sudoku.xbm"
#endif // WIN32
#include <config.h>
#ifdef HAVE_ALSA_ASOUNDLIB_H
# define ALSA_PCM_NEW_HW_PARAMS_API
# include <alsa/asoundlib.h>
#endif // HAVE_ALSA_ASOUNDLIB_H
//
// Default sizes...
//
#define GROUP_SIZE 160
#define CELL_SIZE 50
#define CELL_OFFSET 5
#ifdef __APPLE__
# define MENU_OFFSET 0
#else
# define MENU_OFFSET 25
#endif // __APPLE__
// Sound class for Sudoku...
//
// There are MANY ways to implement sound in a FLTK application.
// The approach we are using here is to conditionally compile OS-
// specific code into the application - CoreAudio for MacOS X, the
// standard Win32 API stuff for Windows, ALSA or X11 for Linux, and
// X11 for all others. We have to support ALSA on Linux because the
// current Xorg releases no longer support XBell() or the PC speaker.
//
// There are several good cross-platform audio libraries we could also
// use, such as OpenAL, PortAudio, and SDL, however they were not chosen
// for this application because of our limited use of sound.
class SudokuSound {
// Private, OS-specific data...
#ifdef __APPLE__
#elif defined(WIN32)
#else
# ifdef HAVE_ALSA_ASOUNDLIB_H
snd_pcm_t *handle;
# endif // HAVE_ALSA_ASOUNDLIB_H
#endif // __APPLE__
// Common data...
static int frequencies[9];
static short *sample_data[9];
static int sample_size;
public:
SudokuSound();
~SudokuSound();
void play(char note);
};
int SudokuSound::frequencies[9] = {
880, // A(5)
988, // B(5)
1046, // C(5)
1174, // D(5)
1318, // E(5)
1396, // F(5)
1568, // G(5)
1760, // H (A6)
1976 // I (B6)
};
short *SudokuSound::sample_data[9] = { 0 };
int SudokuSound::sample_size = 0;
// Initialize the SudokuSound class
SudokuSound::SudokuSound() {
sample_size = 0;
#ifdef __APPLE__
#elif defined(WIN32)
#else
# ifdef HAVE_ALSA_ASOUNDLIB_H
handle = NULL;
if (snd_pcm_open(&handle, "default", SND_PCM_STREAM_PLAYBACK, 0) >= 0) {
// Initialize PCM sound stuff...
snd_pcm_hw_params_t *params;
snd_pcm_hw_params_alloca(&params);
snd_pcm_hw_params_any(handle, params);
snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED);
snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
snd_pcm_hw_params_set_channels(handle, params, 2);
unsigned rate = 44100;
int dir;
snd_pcm_hw_params_set_rate_near(handle, params, &rate, &dir);
snd_pcm_uframes_t period = (int)rate / 4;
snd_pcm_hw_params_set_period_size_near(handle, params, &period, &dir);
sample_size = rate / 20;
if (snd_pcm_hw_params(handle, params) < 0) {
sample_size = 0;
snd_pcm_close(handle);
handle = NULL;
}
}
# endif // HAVE_ALSA_ASOUNDLIB_H
#endif // __APPLE__
if (sample_size) {
// Make each of the notes using a combination of sine and sawtooth waves
int attack = sample_size / 10;
int decay = 4 * sample_size / 5;
for (int i = 0; i < 9; i ++) {
sample_data[i] = new short[2 * sample_size];
short *sample_ptr = sample_data[i];
for (int j = 0; j < sample_size; j ++, sample_ptr += 2) {
double theta = 0.05 * frequencies[i] * j / sample_size;
double val = 0.5 * sin(2.0 * M_PI * theta) + theta - (int)theta - 0.5;
if (j < attack) {
*sample_ptr = (int)(32767 * val * j / attack);
} else if (j > decay) {
*sample_ptr = (int)(32767 * val * (sample_size - j + decay) /
sample_size);
} else *sample_ptr = (int)(32767 * val);
sample_ptr[1] = *sample_ptr;
}
}
}
}
// Cleanup the SudokuSound class
SudokuSound::~SudokuSound() {
#ifdef __APPLE__
#elif defined(WIN32)
#else
# ifdef HAVE_ALSA_ASOUNDLIB_H
if (handle) {
snd_pcm_drain(handle);
snd_pcm_close(handle);
}
# endif // HAVE_ALSA_ASOUNDLIB_H
#endif // __APPLE__
if (sample_size) {
for (int i = 0; i < 9; i ++) {
delete[] sample_data[i];
}
}
}
// Play a note for 250ms...
void SudokuSound::play(char note) {
Fl::check();
#ifdef __APPLE__
// TODO
#elif defined(WIN32)
Beep(frequencies[note - 'A'], 50);
#else
# ifdef HAVE_ALSA_ASOUNDLIB_H
if (handle) {
// Use ALSA to play the sound...
if (snd_pcm_writei(handle, sample_data[note - 'A'], sample_size) < 0) {
snd_pcm_prepare(handle);
snd_pcm_writei(handle, sample_data[note - 'A'], sample_size);
}
usleep(50000);
return;
}
# endif // HAVE_ALSA_ASOUNDLIB_H
// Just use standard X11 stuff...
XKeyboardState state;
XKeyboardControl control;
// Get original pitch and duration...
XGetKeyboardControl(fl_display, &state);
// Sound a tone for the given note...
control.bell_percent = 100;
control.bell_pitch = frequencies[note - 'A'];
control.bell_duration = 50;
XChangeKeyboardControl(fl_display,
KBBellPercent | KBBellPitch | KBBellDuration,
&control);
XBell(fl_display, 100);
XFlush(fl_display);
// Restore original pitch and duration...
control.bell_percent = state.bell_percent;
control.bell_pitch = state.bell_pitch;
control.bell_duration = state.bell_duration;
XChangeKeyboardControl(fl_display,
KBBellPercent | KBBellPitch | KBBellDuration,
&control);
#endif // __APPLE__
}
// Sudoku cell class...
class SudokuCell : public Fl_Widget {
bool readonly_;
int value_;
int test_value_[8];
public:
SudokuCell(int X, int Y, int W, int H);
void draw();
int handle(int event);
void readonly(bool r) { readonly_ = r; redraw(); }
bool readonly() const { return readonly_; }
void test_value(int v, int n) { test_value_[n] = v; redraw(); }
int test_value(int n) const { return test_value_[n]; }
void value(int v) {
value_ = v;
for (int i = 0; i < 8; i ++) test_value_[i] = 0;
redraw();
}
int value() const { return value_; }
};
// Create a cell widget
SudokuCell::SudokuCell(int X, int Y, int W, int H)
: Fl_Widget(X, Y, W, H, 0) {
value(0);
}
// Draw cell
void
SudokuCell::draw() {
static Fl_Align align[8] = {
FL_ALIGN_TOP_LEFT,
FL_ALIGN_TOP,
FL_ALIGN_TOP_RIGHT,
FL_ALIGN_RIGHT,
FL_ALIGN_BOTTOM_RIGHT,
FL_ALIGN_BOTTOM,
FL_ALIGN_BOTTOM_LEFT,
FL_ALIGN_LEFT
};
// Draw the cell box...
if (readonly()) fl_draw_box(FL_UP_BOX, x(), y(), w(), h(), color());
else fl_draw_box(FL_DOWN_BOX, x(), y(), w(), h(), color());
// Draw the cell background...
if (Fl::focus() == this) {
Fl_Color c = fl_color_average(FL_SELECTION_COLOR, color(), 0.5f);
fl_color(c);
fl_rectf(x() + 4, y() + 4, w() - 8, h() - 8);
fl_color(fl_contrast(labelcolor(), c));
} else fl_color(labelcolor());
// Draw the cell value...
char s[2];
s[1] = '\0';
if (value_) {
s[0] = value_ + '0';
fl_font(FL_HELVETICA_BOLD, h() - 10);
fl_draw(s, x(), y(), w(), h(), FL_ALIGN_CENTER);
}
fl_font(FL_HELVETICA_BOLD, h() / 5);
for (int i = 0; i < 8; i ++) {
if (test_value_[i]) {
s[0] = test_value_[i] + '0';
fl_draw(s, x() + 5, y() + 5, w() - 10, h() - 10, align[i]);
}
}
}
// Handle events in cell
int
SudokuCell::handle(int event) {
switch (event) {
case FL_FOCUS :
Fl::focus(this);
redraw();
return 1;
case FL_UNFOCUS :
redraw();
return 1;
break;
case FL_PUSH :
if (Fl::event_inside(this)) {
Fl::focus(this);
redraw();
return 1;
}
break;
case FL_KEYDOWN :
if (Fl::event_state() & FL_CTRL) break;
int key = Fl::event_key() - '0';
if (key < 0 || key > 9) key = Fl::event_key() - FL_KP - '0';
if (key > 0 && key <= 9) {
if (readonly()) {
fl_beep(FL_BEEP_ERROR);
return 1;
}
if (Fl::event_state() & (FL_SHIFT | FL_CAPS_LOCK)) {
int i;
for (i = 0; i < 8; i ++)
if (test_value_[i] == key) {
test_value_[i] = 0;
break;
}
if (i >= 8) {
for (i = 0; i < 8; i ++)
if (!test_value_[i]) {
test_value_[i] = key;
break;
}
}
if (i >= 8) {
for (i = 0; i < 7; i ++) test_value_[i] = test_value_[i + 1];
test_value_[i] = key;
}
redraw();
} else {
value(key);
do_callback();
}
return 1;
} else if (key == 0 || Fl::event_key() == FL_BackSpace ||
Fl::event_key() == FL_Delete) {
if (readonly()) {
fl_beep(FL_BEEP_ERROR);
return 1;
}
value(0);
do_callback();
return 1;
}
break;
}
return Fl_Widget::handle(event);
}
// Sudoku window class...
class Sudoku : public Fl_Window {
Fl_Sys_Menu_Bar *menubar_;
Fl_Group *grid_;
time_t seed_;
char grid_values_[9][9];
SudokuCell *grid_cells_[9][9];
Fl_Group *grid_groups_[3][3];
int difficulty_;
SudokuSound *sound_;
static void check_cb(Fl_Widget *widget, void *);
static void close_cb(Fl_Widget *widget, void *);
static void diff_cb(Fl_Widget *widget, void *d);
static void help_cb(Fl_Widget *, void *);
static void new_cb(Fl_Widget *widget, void *);
static void reset_cb(Fl_Widget *widget, void *);
static void restart_cb(Fl_Widget *widget, void *);
void set_title();
static void solve_cb(Fl_Widget *widget, void *);
static Fl_Help_Dialog *help_dialog_;
static Fl_Preferences prefs_;
public:
Sudoku();
~Sudoku();
void check_game(bool highlight = true);
void load_game();
void new_game(time_t seed);
void resize(int X, int Y, int W, int H);
void save_game();
void solve_game();
};
// Sudoku class globals...
Fl_Help_Dialog *Sudoku::help_dialog_ = (Fl_Help_Dialog *)0;
Fl_Preferences Sudoku::prefs_(Fl_Preferences::USER, "fltk.org", "sudoku");
// Create a Sudoku game window...
Sudoku::Sudoku()
: Fl_Window(GROUP_SIZE * 3, GROUP_SIZE * 3 + MENU_OFFSET, "Sudoku")
{
int i, j;
Fl_Group *g;
SudokuCell *cell;
static Fl_Menu_Item items[] = {
{ "&Game", 0, 0, 0, FL_SUBMENU },
{ "&New Game", FL_COMMAND | 'n', new_cb, 0, FL_MENU_DIVIDER },
{ "&Check Game", FL_COMMAND | 'c', check_cb, 0, 0 },
{ "&Restart Game", FL_COMMAND | 'r', restart_cb, 0, 0 },
{ "&Solve Game", FL_COMMAND | 's', solve_cb, 0, FL_MENU_DIVIDER },
{ "&Quit", FL_COMMAND | 'q', close_cb, 0, 0 },
{ 0 },
{ "&Difficulty", 0, 0, 0, FL_SUBMENU },
{ "&Easy", FL_COMMAND | '1', diff_cb, (void *)"0", FL_MENU_RADIO },
{ "&Medium", FL_COMMAND | '2', diff_cb, (void *)"1", FL_MENU_RADIO },
{ "&Hard", FL_COMMAND | '3', diff_cb, (void *)"2", FL_MENU_RADIO },
{ "&Impossible", FL_COMMAND | '4', diff_cb, (void *)"3", FL_MENU_RADIO },
{ 0 },
{ "&Help", 0, 0, 0, FL_SUBMENU },
{ "&About Sudoku", FL_F + 1, help_cb, 0, 0 },
{ 0 },
{ 0 }
};
// Setup sound output...
sound_ = new SudokuSound();
// Menubar...
prefs_.get("difficulty", difficulty_, 0);
if (difficulty_ < 0 || difficulty_ > 3) difficulty_ = 0;
items[7 + difficulty_].flags |= FL_MENU_VALUE;
menubar_ = new Fl_Sys_Menu_Bar(0, 0, 3 * GROUP_SIZE, 25);
menubar_->menu(items);
// Create the grids...
grid_ = new Fl_Group(0, MENU_OFFSET, 3 * GROUP_SIZE, 3 * GROUP_SIZE);
for (i = 0; i < 3; i ++)
for (j = 0; j < 3; j ++) {
g = new Fl_Group(j * GROUP_SIZE, i * GROUP_SIZE + MENU_OFFSET,
GROUP_SIZE, GROUP_SIZE);
g->box(FL_BORDER_BOX);
g->color(FL_DARK3);
g->end();
grid_groups_[i][j] = g;
}
for (i = 0; i < 9; i ++)
for (j = 0; j < 9; j ++) {
cell = new SudokuCell(j * CELL_SIZE + CELL_OFFSET +
(j / 3) * (GROUP_SIZE - 3 * CELL_SIZE),
i * CELL_SIZE + CELL_OFFSET + MENU_OFFSET +
(i / 3) * (GROUP_SIZE - 3 * CELL_SIZE),
CELL_SIZE, CELL_SIZE);
cell->callback(reset_cb);
grid_cells_[i][j] = cell;
}
// Set icon for window (MacOS uses app bundle for icon...)
#ifdef WIN32
icon((char *)LoadIcon(fl_display, MAKEINTRESOURCE(IDI_ICON)));
#elif !defined(__APPLE__)
fl_open_display();
icon((char *)XCreateBitmapFromData(fl_display, DefaultRootWindow(fl_display),
(char *)sudoku_bits, sudoku_width,
sudoku_height));
#endif // WIN32
// Catch window close events...
callback(close_cb);
// Make the window resizable...
resizable(grid_);
size_range(3 * GROUP_SIZE, 3 * GROUP_SIZE + MENU_OFFSET, 0, 0, 5, 5, 1);
// Restore the previous window dimensions...
int X, Y, W, H;
if (prefs_.get("x", X, -1)) {
prefs_.get("y", Y, -1);
prefs_.get("width", W, 3 * GROUP_SIZE);
prefs_.get("height", H, 3 * GROUP_SIZE + MENU_OFFSET);
resize(X, X, W, H);
}
set_title();
}
// Destroy the sudoku window...
Sudoku::~Sudoku() {
delete sound_;
}
// Check for a solution to the game...
void
Sudoku::check_cb(Fl_Widget *widget, void *) {
((Sudoku *)(widget->window()))->check_game();
}
// Check if the user has correctly solved the game...
void
Sudoku::check_game(bool highlight) {
bool empty = false;
bool correct = true;
int i, j, k;
// Check the game for right/wrong answers...
for (i = 0; i < 9; i ++)
for (j = 0; j < 9; j ++) {
SudokuCell *cell = grid_cells_[i][j];
int val = cell->value();
if (cell->readonly()) continue;
if (!val) empty = true;
else {
for (k = 0; k < 9; k ++)
if ((i != k && grid_cells_[k][j]->value() == val) ||
(j != k && grid_cells_[i][k]->value() == val)) break;
if (k < 9) {
if (highlight) {
cell->color(FL_YELLOW);
cell->redraw();
}
correct = false;
} else if (highlight) {
cell->color(FL_LIGHT3);
cell->redraw();
}
}
}
if (!empty && correct) {
// Success!
for (i = 0; i < 9; i ++) {
for (j = 0; j < 9; j ++) {
SudokuCell *cell = grid_cells_[i][j];
cell->color(FL_GREEN);
cell->readonly(1);
}
sound_->play('A' + grid_cells_[i][8]->value() - 1);
}
}
}
// Close the window, saving the game first...
void
Sudoku::close_cb(Fl_Widget *widget, void *) {
Sudoku *s = (Sudoku *)(widget->window() ? widget->window() : widget);
s->save_game();
s->hide();
if (help_dialog_) help_dialog_->hide();
}
// Set the level of difficulty...
void
Sudoku::diff_cb(Fl_Widget *widget, void *d) {
Sudoku *s = (Sudoku *)(widget->window() ? widget->window() : widget);
s->difficulty_ = atoi((char *)d);
s->new_game(s->seed_);
s->set_title();
prefs_.set("difficulty", s->difficulty_);
}
// Show the on-line help...
void
Sudoku::help_cb(Fl_Widget *, void *) {
if (!help_dialog_) {
help_dialog_ = new Fl_Help_Dialog();
help_dialog_->value(
"<HTML>\n"
"<HEAD>\n"
"<TITLE>Sudoku Help</TITLE>\n"
"</HEAD>\n"
"<BODY>\n"
"<H2>About the Game</H2>\n"
"<P>Sudoku (pronounced soo-dough-coo with the emphasis on the\n"
"first syllable) is a simple number-based puzzle/game played on a\n"
"9x9 grid that is divided into 3x3 subgrids. The goal is to enter\n"
"a number from 1 to 9 in each cell so that each number appears\n"
"only once in each column and row. In addition, each 3x3 subgrid\n"
"may only contain one of each number.</P>\n"
"<P>This version of the puzzle is Copyright 2005 by Michael R Sweet</P>\n"
"<H2>How to Play the Game</H2>\n"
"<P>At the start of a new game, Sudoku fills in a random selection\n"
"of cells for you - the number of cells depends on the difficulty\n"
"level you use. Click in any of the empty cells or use the arrow\n"
"keys to highlight individual cells and press a number from 1 to 9\n"
"to fill in the cell. To clear a cell, press 0, Delete, or\n"
"Backspace. When you have successfully completed all subgrids, the\n"
"entire puzzle is highlighted in green until you start a new\n"
"game.</P>\n"
"<P>As you work to complete the puzzle, you can display possible\n"
"solutions inside each cell by holding the Shift key and pressing\n"
"each number in turn. Repeat the process to remove individual\n"
"numbers, or press a number without the Shift key to replace them\n"
"with the actual number to use.</P>\n"
"</BODY>\n"
);
}
help_dialog_->show();
}
// Load the game from saved preferences...
void
Sudoku::load_game() {
// Load the current values and state of each grid...
memset(grid_values_, 0, sizeof(grid_values_));
bool solved = true;
for (int i = 0; i < 9; i ++)
for (int j = 0; j < 9; j ++) {
char name[255];
int val;
SudokuCell *cell = grid_cells_[i][j];
sprintf(name, "value%d.%d", i, j);
if (!prefs_.get(name, val, 0)) {
i = 9;
grid_values_[0][0] = 0;
break;
}
grid_values_[i][j] = val;
sprintf(name, "state%d.%d", i, j);
prefs_.get(name, val, 0);
cell->value(val);
sprintf(name, "readonly%d.%d", i, j);
prefs_.get(name, val, 0);
cell->readonly(val);
if (val) cell->color(FL_GRAY);
else {
cell->color(FL_LIGHT3);
solved = false;
}
for (int k = 0; k < 8; k ++) {
sprintf(name, "test%d%d.%d", k, i, j);
prefs_.get(name, val, 0);
cell->test_value(val, k);
}
}
// If we didn't load any values or the last game was solved, then
// create a new game automatically...
if (solved || !grid_values_[0][0]) new_game(time(NULL));
else check_game(false);
}
// Create a new game...
void
Sudoku::new_cb(Fl_Widget *widget, void *) {
((Sudoku *)(widget->window()))->new_game(time(NULL));
}
// Create a new game...
void
Sudoku::new_game(time_t seed) {
int i, j, k, m, t, count;
// Generate a new (valid) Sudoku grid...
seed_ = seed;
srand(seed);
memset(grid_values_, 0, sizeof(grid_values_));
for (i = 0; i < 9; i += 3) {
for (j = 0; j < 9; j += 3) {
for (t = 1; t <= 9; t ++) {
for (count = 0; count < 20; count ++) {
k = i + (rand() % 3);
m = j + (rand() % 3);
if (!grid_values_[k][m]) {
int kk;
for (kk = 0; kk < k; kk ++)
if (grid_values_[kk][m] == t) break;
if (kk < k) continue;
int mm;
for (mm = 0; mm < m; mm ++)
if (grid_values_[k][mm] == t) break;
if (mm < m) continue;
grid_values_[k][m] = t;
break;
}
}
if (count == 20) {
// Unable to find a valid puzzle so far, so start over...
j = 9;
i = -3;
memset(grid_values_, 0, sizeof(grid_values_));
}
}
}
}
// Start by making all cells editable
SudokuCell *cell;
for (i = 0; i < 9; i ++)
for (j = 0; j < 9; j ++) {
cell = grid_cells_[i][j];
cell->value(0);
cell->readonly(0);
cell->color(FL_LIGHT3);
}
// Show N cells...
count = 10 * (5 - difficulty_);
int numbers[9];
for (i = 0; i < 9; i ++) numbers[i] = i + 1;
while (count > 0) {
for (i = 0; i < 20; i ++) {
k = rand() % 9;
m = rand() % 9;
t = numbers[k];
numbers[k] = numbers[m];
numbers[m] = t;
}
for (i = 0; count > 0 && i < 9; i ++) {
t = numbers[i];
for (j = 0; count > 0 && j < 9; j ++) {
cell = grid_cells_[i][j];
if (grid_values_[i][j] == t && !cell->readonly()) {
cell->value(grid_values_[i][j]);
cell->readonly(1);
cell->color(FL_GRAY);
count --;
break;
}
}
sound_->play('A' + t - 1);
}
}
}
// Reset widget color to gray...
void
Sudoku::reset_cb(Fl_Widget *widget, void *) {
widget->color(FL_LIGHT3);
widget->redraw();
((Sudoku *)(widget->window()))->check_game(false);
}
// Resize the window...
void
Sudoku::resize(int X, int Y, int W, int H) {
// Resize the window...
Fl_Window::resize(X, Y, W, H);
// Save the new window geometry...
prefs_.set("x", X);
prefs_.set("y", Y);
prefs_.set("width", W);
prefs_.set("height", H);
}
// Save the current game state...
void
Sudoku::save_game() {
// Save the current values and state of each grid...
for (int i = 0; i < 9; i ++)
for (int j = 0; j < 9; j ++) {
char name[255];
SudokuCell *cell = grid_cells_[i][j];
sprintf(name, "value%d.%d", i, j);
prefs_.set(name, grid_values_[i][j]);
sprintf(name, "state%d.%d", i, j);
prefs_.set(name, cell->value());
sprintf(name, "readonly%d.%d", i, j);
prefs_.set(name, cell->readonly());
for (int k = 0; k < 8; k ++) {
sprintf(name, "test%d%d.%d", k, i, j);
prefs_.set(name, cell->test_value(k));
}
}
}
// Restart game from beginning...
void
Sudoku::restart_cb(Fl_Widget *widget, void *) {
Sudoku *s = (Sudoku *)(widget->window());
s->new_game(s->seed_);
}
// Set title of window...
void
Sudoku::set_title() {
static const char * const titles[] = {
"Sudoku - Easy",
"Sudoku - Medium",
"Sudoku - Hard",
"Sudoku - Impossible"
};
label(titles[difficulty_]);
}
// Solve the puzzle...
void
Sudoku::solve_cb(Fl_Widget *widget, void *) {
((Sudoku *)(widget->window()))->solve_game();
}
// Solve the puzzle...
void
Sudoku::solve_game() {
int i, j;
for (i = 0; i < 9; i ++) {
for (j = 0; j < 9; j ++) {
SudokuCell *cell = grid_cells_[i][j];
cell->value(grid_values_[i][j]);
cell->readonly(1);
cell->color(FL_GRAY);
}
sound_->play('A' + grid_cells_[i][8]->value() - 1);
}
}
// Main entry for game...
int
main(int argc, char *argv[]) {
Sudoku s;
// Show the game...
s.show(argc, argv);
// Load the previous game...
s.load_game();
// Run until the user quits...
return (Fl::run());
}
//
// End of "$Id$".
//
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