git.cworth.org Git - loa/blob - loa.c

   1 /*
   2  * Copyright (C) 2008 Carl Worth
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see http://www.gnu.org/licenses/ .
  16  *
  17  * Author: Carl Worth <cworth@cworth.org>
  18  */
  19
  20 #include <gtk/gtk.h>
  21 #include <math.h>
  22
  23 #include "loa-board.h"
  24
  25 #define BOARD_SIZE 8
  26
  27 typedef struct {
  28     int x_offset;
  29     int y_offset;
  30     int width;
  31     int height;
  32     int cell_size;
  33 } layout_t;
  34
  35 typedef struct {
  36     layout_t layout;
  37     loa_board_t board;
  38     loa_bool_t has_selected;
  39     int selected_x;
  40     int selected_y;
  41 } loa_game_t;
  42
  43 static gboolean
  44 on_delete_event_quit (GtkWidget  *widget,
  45                       GdkEvent   *event,
  46                       gpointer    user_data)
  47 {
  48     gtk_main_quit ();
  49
  50     /* Returning FALSE allows the default handler for delete-event
  51      * to proceed to cleanup the widget. */
  52     return FALSE;
  53 }
  54
  55 /* Something like buff */
  56 #define LIGHT_SQUARE_COLOR 0.89, 0.70, 0.40
  57 /* Something like mahogany */
  58 #define DARK_SQUARE_COLOR  0.26, 0.02, 0.01
  59
  60 static gboolean
  61 on_button_press_event (GtkWidget        *widget,
  62                        GdkEventButton   *event,
  63                        gpointer          user_data)
  64 {
  65     loa_game_t *game = user_data;
  66     layout_t *layout = &game->layout;
  67     int x, y;
  68     char *error;
  69
  70     x = (event->x - layout->x_offset) / layout->cell_size;
  71     y = (event->y - layout->y_offset) / layout->cell_size;
  72
  73     if (! game->has_selected) {
  74         if (game->board.cells[x][y] == game->board.player) {
  75             game->has_selected = TRUE;
  76             game->selected_x = x;
  77             game->selected_y = y;
  78             gtk_widget_queue_draw (widget);
  79         }
  80         return TRUE;
  81     }
  82
  83     if (x == game->selected_x &&
  84         y == game->selected_y)
  85     {
  86         game->has_selected = FALSE;
  87         gtk_widget_queue_draw (widget);
  88         return TRUE;
  89     }
  90
  91     if (loa_board_move (&game->board,
  92                         game->selected_x, game->selected_y,
  93                         x, y, &error))
  94     {
  95         game->has_selected = FALSE;
  96         gtk_widget_queue_draw (widget);
  97         return TRUE;
  98     } else {
  99         printf ("Illegal move %c%d%c%d: %s\n",
 100                 'a' + game->selected_x,
 101                 LOA_BOARD_SIZE - game->selected_y,
 102                 'a' + x,
 103                 LOA_BOARD_SIZE - y,
 104                 error);
 105     }
 106
 107     return TRUE;
 108 }
 109
 110 static gboolean
 111 on_expose_event_draw (GtkWidget         *widget,
 112                       GdkEventExpose    *event,
 113                       gpointer           user_data)
 114 {
 115     loa_game_t *game = user_data;
 116     layout_t *layout = &game->layout;
 117     cairo_t *cr;
 118     int x, y;
 119
 120     if (layout->width != widget->allocation.width ||
 121         layout->height != widget->allocation.height)
 122     {
 123         int size;
 124
 125         layout->width = widget->allocation.width;
 126         layout->height = widget->allocation.height;
 127
 128         size = MIN (layout->width, layout->height);
 129         /* Size must be a multiple of the integer cell_size */
 130         layout->cell_size = size / BOARD_SIZE;
 131         size = layout->cell_size * BOARD_SIZE;
 132
 133         layout->x_offset = (layout->width - size) / 2;
 134         layout->y_offset = (layout->height - size) / 2;
 135     }
 136
 137     cr = gdk_cairo_create (widget->window);
 138
 139     cairo_translate (cr, layout->x_offset, layout->y_offset);
 140
 141     for (y = 0; y < BOARD_SIZE; y++) {
 142         for (x = 0; x < BOARD_SIZE; x++) {
 143             loa_cell_t cell;
 144             cairo_save (cr);
 145             cairo_translate(cr, x * layout->cell_size, y * layout->cell_size);
 146             if ((x + y) % 2 == 0)
 147                 cairo_set_source_rgb (cr, LIGHT_SQUARE_COLOR);
 148             else
 149                 cairo_set_source_rgb (cr, DARK_SQUARE_COLOR);
 150             cairo_rectangle (cr, 0, 0, layout->cell_size, layout->cell_size);
 151             cairo_fill (cr);
 152             cell = game->board.cells[x][y];
 153             if (cell != LOA_CELL_EMPTY) {
 154                 cairo_arc (cr,
 155                            layout->cell_size / 2.0, layout->cell_size / 2.0,
 156                            layout->cell_size / 2.5,
 157                            0, 2 * M_PI);
 158                 if (cell == LOA_CELL_BLACK)
 159                     cairo_set_source_rgb (cr, 0, 0, 0); /* black */
 160                 else
 161                     cairo_set_source_rgb (cr, 1, 1, 1); /* white */
 162                 cairo_fill_preserve (cr);
 163                 cairo_set_line_width (cr, 2.0);
 164                 if (cell == LOA_CELL_BLACK)
 165                     cairo_set_source_rgb (cr, LIGHT_SQUARE_COLOR);
 166                 else
 167                     cairo_set_source_rgb (cr, DARK_SQUARE_COLOR);
 168                 cairo_stroke (cr);
 169             }
 170             if (game->has_selected &&
 171                 x == game->selected_x &&
 172                 y == game->selected_y)
 173             {
 174                 cairo_arc (cr,
 175                            layout->cell_size / 2.0, layout->cell_size / 2.0,
 176                            layout->cell_size / 2.5,
 177                            0, 2 * M_PI);
 178                 cairo_set_source_rgba (cr, 0.2, 0.2, 1.0, 0.4);
 179                 cairo_fill (cr);
 180             }
 181             cairo_restore (cr);
 182         }
 183     }
 184
 185     cairo_destroy (cr);
 186
 187     return TRUE;
 188 }
 189
 190 static void
 191 loa_game_init (loa_game_t *game)
 192 {
 193     game->layout.width = 0;
 194     game->layout.height = 0;
 195
 196     game->has_selected = FALSE;
 197
 198     loa_board_init (&game->board);
 199 }
 200
 201 int
 202 main (int argc, char *argv[])
 203 {
 204     GtkWidget *window;
 205     GtkWidget *drawing_area;
 206     loa_game_t game;
 207
 208     loa_game_init (&game);
 209
 210     gtk_init (&argc, &argv);
 211
 212     window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
 213
 214     gtk_window_set_default_size (GTK_WINDOW (window), 256, 256);
 215
 216     g_signal_connect (window, "delete-event",
 217                       G_CALLBACK (on_delete_event_quit), NULL);
 218
 219     drawing_area = gtk_drawing_area_new ();
 220
 221     gtk_container_add (GTK_CONTAINER (window), drawing_area);
 222
 223     g_signal_connect (drawing_area, "expose-event",
 224                       G_CALLBACK (on_expose_event_draw), &game);
 225
 226     gtk_widget_add_events (drawing_area, GDK_BUTTON_PRESS_MASK);
 227     g_signal_connect (drawing_area, "button-press-event",
 228                       G_CALLBACK (on_button_press_event), &game);
 229
 230     gtk_widget_show_all (window);
 231
 232     gtk_main ();
 233
 234     return 0;
 235 }