2 * Copyright (C) 2009 Carl Worth
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.
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.
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/ .
17 * Author: Carl Worth <cworth@cworth.org>
24 #include "dvonn-board.h"
26 #define BOARD_X_SIZE 11
27 #define BOARD_Y_SIZE 5
37 typedef struct _dvonn_game dvonn_game_t;
50 dvonn_bool_t has_selected;
56 on_delete_event_quit (GtkWidget *widget,
62 /* Returning FALSE allows the default handler for delete-event
63 * to proceed to cleanup the widget. */
67 /* Something like buff */
68 #define BACKGROUND_COLOR 0.89, 0.70, 0.40
69 #define LIGHT_SQUARE_COLOR 0.89, 0.70, 0.40
70 /* Something like mahogany */
71 #define DARK_SQUARE_COLOR 0.26, 0.02, 0.01
73 /* XXX: This really should have an interest rectangle. */
75 dvonn_game_update_windows (dvonn_game_t *game)
79 for (i = 0; i < game->num_views; i++)
80 gtk_widget_queue_draw (game->views[i]->window);
83 /* Convert from a board index to a device-pixel coordinate pair, (at
84 * the center of the ring). */
86 layout_board_to_device (layout_t *layout, double *x_ret, double *y_ret)
88 double x = *x_ret, y = *y_ret;
90 *x_ret = layout->x_offset + layout->cell_size *
91 (x + (y - DVONN_BOARD_Y_SIZE/2)/2.0 + 0.5);
92 *y_ret = layout->y_offset + layout->cell_size * (M_SQRT1_2 * y + 0.5);
95 /* Convert from a device-pixel coordinate pair to a board index. */
97 layout_device_to_board (layout_t *layout, int *x_ret, int *y_ret)
99 int x = *x_ret, y = *y_ret;
101 double x1_dev, y1_dev, x2_dev, y2_dev;
102 double dx, dy, d1, d2;
104 /* Because the vertical spacing between adjacent rows is less than
105 * layout->cell_size, the simple calculations here give us two
106 * candidate (x,y) pairs. We then choose the correct one based on
107 * a distance calculation.
109 y1 = (y - layout->y_offset) / (layout->cell_size * M_SQRT1_2);
110 x1 = (double) (x - layout->x_offset) / layout->cell_size - (y1 - DVONN_BOARD_Y_SIZE/2)/2.0;
113 x2 = (double) (x - layout->x_offset) / layout->cell_size - (y2 - DVONN_BOARD_Y_SIZE/2)/2.0;
117 layout_board_to_device (layout, &x1_dev, &y1_dev);
121 layout_board_to_device (layout, &x2_dev, &y2_dev);
125 d1 = sqrt (dx*dx + dy*dy);
129 d2 = sqrt (dx*dx + dy*dy);
141 on_button_press_event (GtkWidget *widget,
142 GdkEventButton *event,
145 view_t *view = user_data;
146 layout_t *layout = &view->layout;
147 dvonn_game_t *game = view->game;
153 layout_device_to_board (layout, &x, &y);
155 /* Do nothing for out-of-bounds clicks */
156 if (x < 0 || x >= DVONN_BOARD_X_SIZE ||
157 y < 0 || y >= DVONN_BOARD_Y_SIZE)
162 /* Nor for cells which have array entries that are invalid. */
163 if (game->board.cells[x][y].type == DVONN_CELL_INVALID)
166 if (game->board.phase == DVONN_PHASE_PLACEMENT) {
167 if (dvonn_board_place (&game->board, x, y, &error))
168 dvonn_game_update_windows (game);
170 printf ("Illegal placement %c%d: %s\n",
178 if (! game->has_selected) {
179 if (game->board.cells[x][y].type == game->board.player) {
180 game->has_selected = TRUE;
181 game->selected_x = x;
182 game->selected_y = y;
183 dvonn_game_update_windows (game);
188 if (x == game->selected_x && y == game->selected_y)
190 game->has_selected = FALSE;
191 dvonn_game_update_windows (game);
195 if (dvonn_board_move (&game->board,
196 game->selected_x, game->selected_y,
199 game->has_selected = FALSE;
200 dvonn_game_update_windows (game);
203 printf ("Illegal move %c%d%c%d: %s\n",
204 'a' + game->selected_x,
205 game->selected_y + 1,
214 /* Add a unit-sized DVONN-ring path to cr, from (0,0) to (1,1). */
216 ring_path (cairo_t *cr)
218 cairo_arc (cr, 0.5, 0.5, 0.4, 0, 2 * M_PI);
219 cairo_arc_negative (cr, 0.5, 0.5, 0.2, 2 * M_PI, 0);
223 on_expose_event_draw (GtkWidget *widget,
224 GdkEventExpose *event,
227 view_t *view = user_data;
228 layout_t *layout = &view->layout;
229 dvonn_game_t *game = view->game;
233 if (layout->width != widget->allocation.width ||
234 layout->height != widget->allocation.height)
238 layout->width = widget->allocation.width;
239 layout->height = widget->allocation.height;
241 x_size = layout->width;
242 if (x_size > layout->height * BOARD_X_SIZE / (1 + M_SQRT1_2 * (BOARD_Y_SIZE-1)))
243 x_size = layout->height * BOARD_X_SIZE / (1 + M_SQRT1_2 * (BOARD_Y_SIZE-1));
245 /* Size must be a multiple of the integer cell_size */
246 layout->cell_size = x_size / BOARD_X_SIZE;
247 x_size = layout->cell_size * BOARD_X_SIZE;
248 y_size = layout->cell_size * (1 + M_SQRT1_2 * (BOARD_Y_SIZE-1));
250 layout->x_offset = (layout->width - x_size) / 2;
251 layout->y_offset = (layout->height - y_size) / 2;
254 cr = gdk_cairo_create (widget->window);
256 cairo_set_source_rgb (cr, BACKGROUND_COLOR);
259 cairo_translate (cr, layout->x_offset, layout->y_offset);
260 cairo_scale (cr, layout->cell_size, layout->cell_size);
262 for (y = 0; y < BOARD_Y_SIZE; y++) {
263 for (x = 0; x < BOARD_X_SIZE; x++) {
266 cell = game->board.cells[x][y];
267 if (cell.type == DVONN_CELL_INVALID)
272 x + (y - DVONN_BOARD_Y_SIZE/2) / 2.0,
276 case DVONN_CELL_WHITE:
277 cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
279 case DVONN_CELL_BLACK:
280 cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
283 cairo_set_source_rgb (cr, 0.8, 0.2, 0.2); /* red */
285 case DVONN_CELL_EMPTY:
287 cairo_set_source_rgba (cr, 0.0, 0.0, 0.2, 0.1);
302 dvonn_game_init (dvonn_game_t *game)
307 game->has_selected = FALSE;
309 dvonn_board_init (&game->board);
313 view_init (view_t *view, dvonn_game_t *game, GtkWidget *window)
316 view->window = window;
318 view->layout.width = 0;
319 view->layout.height = 0;
323 dvonn_game_create_view (dvonn_game_t *game)
327 GtkWidget *drawing_area;
329 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
331 view = malloc (sizeof (view_t));
333 fprintf (stderr, "Out of memory.\n");
338 game->views = realloc (game->views,
339 game->num_views * sizeof (view_t *));
340 if (game->views == NULL) {
341 fprintf (stderr, "Out of memory.\n");
344 game->views[game->num_views - 1] = view;
346 view_init (view, game, window);
348 gtk_window_set_default_size (GTK_WINDOW (window), 780, 251);
350 g_signal_connect (window, "delete-event",
351 G_CALLBACK (on_delete_event_quit), NULL);
353 drawing_area = gtk_drawing_area_new ();
355 gtk_container_add (GTK_CONTAINER (window), drawing_area);
357 g_signal_connect (drawing_area, "expose-event",
358 G_CALLBACK (on_expose_event_draw), view);
360 gtk_widget_add_events (drawing_area, GDK_BUTTON_PRESS_MASK);
361 g_signal_connect (drawing_area, "button-press-event",
362 G_CALLBACK (on_button_press_event), view);
364 gtk_widget_show_all (window);
368 main (int argc, char *argv[])
372 dvonn_game_init (&game);
374 gtk_init (&argc, &argv);
376 /* Create two views of the game (one for each player) */
377 dvonn_game_create_view (&game);
378 dvonn_game_create_view (&game);