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>
20 #define _GNU_SOURCE /* for vasprintf */
27 #include "dvonn-board.h"
29 #define BOARD_X_SIZE 11
30 #define BOARD_Y_SIZE 5
40 typedef struct _dvonn_game dvonn_game_t;
53 dvonn_bool_t has_selected;
57 PangoFontDescription *font;
59 dvonn_bool_t dual_window_mode;
60 GtkWidget *windows[2];
64 on_delete_event_quit (GtkWidget *widget,
70 /* Returning FALSE allows the default handler for delete-event
71 * to proceed to cleanup the widget. */
75 /* Something like buff */
76 #define BACKGROUND_COLOR 0.89, 0.70, 0.40
78 #define RED_RING_COLOR 0.8, 0.2, 0.2
80 /* Relative to a unit square. */
81 #define RING_OUTER_RADIUS 0.4
82 #define RING_INNER_RADIUS 0.2
83 #define FONT_SIZE (RING_INNER_RADIUS * 1.5)
85 /* XXX: This really should have an interest rectangle. */
87 dvonn_game_update_windows (dvonn_game_t *game)
91 for (i = 0; i < game->num_views; i++)
92 gtk_widget_queue_draw (game->views[i]->window);
95 /* Convert from a board index to a device-pixel coordinate pair, (at
96 * the center of the ring). */
98 layout_board_to_device (layout_t *layout, double *x_ret, double *y_ret)
100 double x = *x_ret, y = *y_ret;
102 *x_ret = layout->x_offset + layout->cell_size *
103 (x + (y - DVONN_BOARD_Y_SIZE/2)/2.0 + 0.5);
104 *y_ret = layout->y_offset + layout->cell_size * (M_SQRT1_2 * y + 0.5);
107 /* Convert from a device-pixel coordinate pair to a board index. */
109 layout_device_to_board (layout_t *layout, int *x_ret, int *y_ret)
111 int x = *x_ret, y = *y_ret;
113 double x1_dev, y1_dev, x2_dev, y2_dev;
114 double dx, dy, d1, d2;
116 /* Because the vertical spacing between adjacent rows is less than
117 * layout->cell_size, the simple calculations here give us two
118 * candidate (x,y) pairs. We then choose the correct one based on
119 * a distance calculation.
121 y1 = (y - layout->y_offset) / (layout->cell_size * M_SQRT1_2);
122 x1 = (double) (x - layout->x_offset) / layout->cell_size - (y1 - DVONN_BOARD_Y_SIZE/2)/2.0;
125 x2 = (double) (x - layout->x_offset) / layout->cell_size - (y2 - DVONN_BOARD_Y_SIZE/2)/2.0;
129 layout_board_to_device (layout, &x1_dev, &y1_dev);
133 layout_board_to_device (layout, &x2_dev, &y2_dev);
137 d1 = sqrt (dx*dx + dy*dy);
141 d2 = sqrt (dx*dx + dy*dy);
153 on_button_press_event (GtkWidget *widget,
154 GdkEventButton *event,
157 view_t *view = user_data;
158 layout_t *layout = &view->layout;
159 dvonn_game_t *game = view->game;
163 /* Ignore events from the non-player. (Obviously when we add more
164 * interaction abilities, we will want to allow those even for the
165 * non-player---things like quit, etc.). */
166 if (game->dual_window_mode &&
167 widget->parent != game->windows[game->board.player])
172 /* Ignore double and triple clicks. */
173 if (event->type >= GDK_2BUTTON_PRESS)
176 /* Right-click means pass, (yes, it would be better to add some
177 * actual UI elements... */
178 if (event->button == 3) {
179 dvonn_board_pass (&game->board);
185 layout_device_to_board (layout, &x, &y);
187 /* Do nothing for out-of-bounds clicks */
188 if (x < 0 || x >= DVONN_BOARD_X_SIZE ||
189 y < 0 || y >= DVONN_BOARD_Y_SIZE)
194 /* Nor for cells which have array entries that are invalid. */
195 if (game->board.cells[x][y].type == DVONN_CELL_INVALID)
198 if (game->board.phase == DVONN_PHASE_PLACEMENT) {
199 if (dvonn_board_place (&game->board, x, y, &error))
200 dvonn_game_update_windows (game);
202 printf ("Illegal placement %c%d: %s\n",
210 if (! game->has_selected) {
211 if (game->board.cells[x][y].type == game->board.player &&
212 ! dvonn_board_cell_surrounded (&game->board, x, y))
214 game->has_selected = TRUE;
215 game->selected_x = x;
216 game->selected_y = y;
217 dvonn_game_update_windows (game);
222 if (x == game->selected_x && y == game->selected_y)
224 game->has_selected = FALSE;
225 dvonn_game_update_windows (game);
229 if (dvonn_board_move (&game->board,
230 game->selected_x, game->selected_y,
233 game->has_selected = FALSE;
234 dvonn_game_update_windows (game);
237 printf ("Illegal move %c%d%c%d: %s\n",
238 'a' + game->selected_x,
239 game->selected_y + 1,
248 /* Add a unit-sized DVONN-ring path to cr, from (0,0) to (1,1). */
250 ring_path (cairo_t *cr)
252 cairo_new_sub_path (cr);
253 cairo_arc (cr, 0.5, 0.5, RING_OUTER_RADIUS, 0, 2 * M_PI);
254 cairo_arc_negative (cr, 0.5, 0.5, RING_INNER_RADIUS, 2 * M_PI, 0);
257 /* Some helper functions for using pango. */
259 _create_layout (cairo_t *cr, PangoFontDescription *font, const char *text)
263 layout = pango_cairo_create_layout (cr);
264 pango_layout_set_font_description (layout, font);
265 pango_layout_set_text (layout, text, -1);
266 pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
271 #define PRINTF_FORMAT(fmt_index, va_index) __attribute__ ((__format__(__printf__, fmt_index, va_index)))
274 _create_layout_vprintf (cairo_t *cr, PangoFontDescription *font, const char *fmt, va_list ap)
279 vasprintf (&text, fmt, ap);
281 layout = _create_layout (cr, font, text);
289 _create_layout_printf (cairo_t *cr, PangoFontDescription *font, const char *fmt, ...)
290 PRINTF_FORMAT (3, 4);
293 _create_layout_printf (cairo_t *cr, PangoFontDescription *font, const char *fmt, ...)
300 layout = _create_layout_vprintf (cr, font, fmt, ap);
308 _destroy_layout (PangoLayout *layout)
310 g_object_unref (layout);
314 _show_layout (cairo_t *cr, PangoLayout *layout)
316 pango_cairo_show_layout (cr, layout);
318 _destroy_layout (layout);
322 on_expose_event_draw (GtkWidget *widget,
323 GdkEventExpose *event,
326 view_t *view = user_data;
327 layout_t *layout = &view->layout;
328 dvonn_game_t *game = view->game;
332 if (layout->width != widget->allocation.width ||
333 layout->height != widget->allocation.height)
337 layout->width = widget->allocation.width;
338 layout->height = widget->allocation.height;
340 x_size = layout->width;
341 if (x_size > layout->height * BOARD_X_SIZE / (1 + M_SQRT1_2 * (BOARD_Y_SIZE-1)))
342 x_size = layout->height * BOARD_X_SIZE / (1 + M_SQRT1_2 * (BOARD_Y_SIZE-1));
344 /* Size must be a multiple of the integer cell_size */
345 layout->cell_size = x_size / BOARD_X_SIZE;
346 x_size = layout->cell_size * BOARD_X_SIZE;
347 y_size = layout->cell_size * (1 + M_SQRT1_2 * (BOARD_Y_SIZE-1));
349 layout->x_offset = (layout->width - x_size) / 2;
350 layout->y_offset = (layout->height - y_size) / 2;
352 if (game->font == NULL) {
353 game->font = pango_font_description_new ();
354 pango_font_description_set_family (game->font, "sans");
356 pango_font_description_set_absolute_size (game->font,
357 FONT_SIZE * PANGO_SCALE);
360 cr = gdk_cairo_create (widget->window);
362 cairo_set_source_rgb (cr, BACKGROUND_COLOR);
365 cairo_translate (cr, layout->x_offset, layout->y_offset);
366 cairo_scale (cr, layout->cell_size, layout->cell_size);
368 for (y = 0; y < BOARD_Y_SIZE; y++) {
369 for (x = 0; x < BOARD_X_SIZE; x++) {
372 cell = game->board.cells[x][y];
373 if (cell.type == DVONN_CELL_INVALID)
378 x + (y - DVONN_BOARD_Y_SIZE/2) / 2.0,
380 if (cell.contains_red && cell.type != DVONN_CELL_RED) {
381 cairo_new_sub_path (cr);
382 cairo_arc (cr, 0.5, 0.5,
383 (RING_INNER_RADIUS + RING_OUTER_RADIUS)/2.0,
385 cairo_set_source_rgb (cr, RED_RING_COLOR);
390 case DVONN_CELL_WHITE:
391 cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
393 case DVONN_CELL_BLACK:
394 cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
397 cairo_set_source_rgb (cr, RED_RING_COLOR);
399 case DVONN_CELL_EMPTY:
401 cairo_set_source_rgba (cr, 0.0, 0.0, 0.2, 0.1);
404 if (game->has_selected &&
405 x == game->selected_x &&
406 y == game->selected_y)
408 cairo_fill_preserve (cr);
409 cairo_set_source_rgba (cr, 0.2, 0.2, 1.0, 0.4);
413 if (game->board.cells[x][y].height > 1) {
416 0.5 - 0.7 * RING_INNER_RADIUS * cos (M_PI_4),
417 0.5 - 1.2 * RING_INNER_RADIUS * sin (M_PI_4));
418 height = _create_layout_printf (cr, game->font, "%d",
419 game->board.cells[x][y].height);
420 _show_layout (cr, height);
433 dvonn_game_init (dvonn_game_t *game)
438 game->has_selected = FALSE;
440 dvonn_board_init (&game->board);
444 game->dual_window_mode = 0;
445 game->windows[0] = NULL;
446 game->windows[1] = NULL;
450 view_init (view_t *view, dvonn_game_t *game, GtkWidget *window)
453 view->window = window;
455 view->layout.width = 0;
456 view->layout.height = 0;
460 dvonn_game_create_view (dvonn_game_t *game)
464 GtkWidget *drawing_area;
466 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
468 view = malloc (sizeof (view_t));
470 fprintf (stderr, "Out of memory.\n");
475 game->views = realloc (game->views,
476 game->num_views * sizeof (view_t *));
477 if (game->views == NULL) {
478 fprintf (stderr, "Out of memory.\n");
481 game->views[game->num_views - 1] = view;
483 view_init (view, game, window);
485 gtk_window_set_default_size (GTK_WINDOW (window), 780, 251);
487 g_signal_connect (window, "delete-event",
488 G_CALLBACK (on_delete_event_quit), NULL);
490 drawing_area = gtk_drawing_area_new ();
492 gtk_container_add (GTK_CONTAINER (window), drawing_area);
494 g_signal_connect (drawing_area, "expose-event",
495 G_CALLBACK (on_expose_event_draw), view);
497 gtk_widget_add_events (drawing_area, GDK_BUTTON_PRESS_MASK);
498 g_signal_connect (drawing_area, "button-press-event",
499 G_CALLBACK (on_button_press_event), view);
501 gtk_widget_show_all (window);
507 main (int argc, char *argv[])
509 GtkWidget *window0, *window1;
514 dvonn_game_init (&game);
516 gtk_init (&argc, &argv);
518 /* Create a view for player 1. */
519 window0 = dvonn_game_create_view (&game);
521 /* Ugly little hack to get Xauthority data from keithp. Obviously
522 * won't work for any other user.
524 setenv ("XAUTHORITY", "/home/keithp/.Xauthority", 1);
527 /* Also ugly that localhost:10.0 is hard-coded, but this will work
528 * for many situations--both for when keithp attaches to my
529 * machine, and for when I connect to anyone's machine and then
530 * connect back, (assuming I haven't made other X forwardings
533 * Clearly we'll want some actual UI to select the right thing
536 display = gdk_display_open ("localhost:10.0");
538 screen = gdk_display_get_default_screen (display);
539 window1 = dvonn_game_create_view (&game);
540 gtk_window_set_screen (GTK_WINDOW (window1), screen);
542 game.dual_window_mode = 1;
543 game.windows[0] = window0;
544 game.windows[1] = window1;