mdw@git.distorted.org.uk Git - sgt/puzzles/blob - gtk.c

   1 /*
   2  * gtk.c: GTK front end for my puzzle collection.
   3  */
   4
   5 #include <stdio.h>
   6 #include <assert.h>
   7 #include <stdlib.h>
   8 #include <time.h>
   9 #include <stdarg.h>
  10
  11 #include <gtk/gtk.h>
  12 #include <gdk/gdkkeysyms.h>
  13
  14 #include "puzzles.h"
  15
  16 /* ----------------------------------------------------------------------
  17  * Error reporting functions used elsewhere.
  18  */
  19
  20 void fatal(char *fmt, ...)
  21 {
  22     va_list ap;
  23
  24     fprintf(stderr, "fatal error: ");
  25
  26     va_start(ap, fmt);
  27     vfprintf(stderr, fmt, ap);
  28     va_end(ap);
  29
  30     fprintf(stderr, "\n");
  31     exit(1);
  32 }
  33
  34 /* ----------------------------------------------------------------------
  35  * GTK front end to puzzles.
  36  */
  37
  38 struct font {
  39     GdkFont *font;
  40     int type;
  41     int size;
  42 };
  43
  44 /*
  45  * This structure holds all the data relevant to a single window.
  46  * In principle this would allow us to open multiple independent
  47  * puzzle windows, although I can't currently see any real point in
  48  * doing so. I'm just coding cleanly because there's no
  49  * particularly good reason not to.
  50  */
  51 struct frontend {
  52     GtkWidget *window;
  53     GtkWidget *area;
  54     GtkWidget *statusbar;
  55     guint statusctx;
  56     GdkPixmap *pixmap;
  57     GdkColor *colours;
  58     int ncolours;
  59     GdkColormap *colmap;
  60     int w, h;
  61     midend_data *me;
  62     GdkGC *gc;
  63     int bbox_l, bbox_r, bbox_u, bbox_d;
  64     int timer_active, timer_id;
  65     struct font *fonts;
  66     int nfonts, fontsize;
  67 };
  68
  69 void frontend_default_colour(frontend *fe, float *output)
  70 {
  71     GdkColor col = fe->window->style->bg[GTK_STATE_NORMAL];
  72     output[0] = col.red / 65535.0;
  73     output[1] = col.green / 65535.0;
  74     output[2] = col.blue / 65535.0;
  75 }
  76
  77 void status_bar(frontend *fe, char *text)
  78 {
  79     assert(fe->statusbar);
  80
  81     gtk_statusbar_pop(GTK_STATUSBAR(fe->statusbar), fe->statusctx);
  82     gtk_statusbar_push(GTK_STATUSBAR(fe->statusbar), fe->statusctx, text);
  83 }
  84
  85 void start_draw(frontend *fe)
  86 {
  87     fe->gc = gdk_gc_new(fe->area->window);
  88     fe->bbox_l = fe->w;
  89     fe->bbox_r = 0;
  90     fe->bbox_u = fe->h;
  91     fe->bbox_d = 0;
  92 }
  93
  94 void clip(frontend *fe, int x, int y, int w, int h)
  95 {
  96     GdkRectangle rect;
  97
  98     rect.x = x;
  99     rect.y = y;
 100     rect.width = w;
 101     rect.height = h;
 102
 103     gdk_gc_set_clip_rectangle(fe->gc, &rect);
 104 }
 105
 106 void unclip(frontend *fe)
 107 {
 108     GdkRectangle rect;
 109
 110     rect.x = 0;
 111     rect.y = 0;
 112     rect.width = fe->w;
 113     rect.height = fe->h;
 114
 115     gdk_gc_set_clip_rectangle(fe->gc, &rect);
 116 }
 117
 118 void draw_text(frontend *fe, int x, int y, int fonttype, int fontsize,
 119                int align, int colour, char *text)
 120 {
 121     int i;
 122
 123     /*
 124      * Find or create the font.
 125      */
 126     for (i = 0; i < fe->nfonts; i++)
 127         if (fe->fonts[i].type == fonttype && fe->fonts[i].size == fontsize)
 128             break;
 129
 130     if (i == fe->nfonts) {
 131         if (fe->fontsize <= fe->nfonts) {
 132             fe->fontsize = fe->nfonts + 10;
 133             fe->fonts = sresize(fe->fonts, fe->fontsize, struct font);
 134         }
 135
 136         fe->nfonts++;
 137
 138         fe->fonts[i].type = fonttype;
 139         fe->fonts[i].size = fontsize;
 140
 141         /*
 142          * FIXME: Really I should make at least _some_ effort to
 143          * pick the correct font.
 144          */
 145         fe->fonts[i].font = gdk_font_load("variable");
 146     }
 147
 148     /*
 149      * Find string dimensions and process alignment.
 150      */
 151     {
 152         int lb, rb, wid, asc, desc;
 153
 154         gdk_string_extents(fe->fonts[i].font, text,
 155                            &lb, &rb, &wid, &asc, &desc);
 156         if (align & ALIGN_VCENTRE)
 157             y += asc - (asc+desc)/2;
 158
 159         if (align & ALIGN_HCENTRE)
 160             x -= wid / 2;
 161         else if (align & ALIGN_HRIGHT)
 162             x -= wid;
 163
 164     }
 165
 166     /*
 167      * Set colour and actually draw text.
 168      */
 169     gdk_gc_set_foreground(fe->gc, &fe->colours[colour]);
 170     gdk_draw_string(fe->pixmap, fe->fonts[i].font, fe->gc, x, y, text);
 171 }
 172
 173 void draw_rect(frontend *fe, int x, int y, int w, int h, int colour)
 174 {
 175     gdk_gc_set_foreground(fe->gc, &fe->colours[colour]);
 176     gdk_draw_rectangle(fe->pixmap, fe->gc, 1, x, y, w, h);
 177 }
 178
 179 void draw_line(frontend *fe, int x1, int y1, int x2, int y2, int colour)
 180 {
 181     gdk_gc_set_foreground(fe->gc, &fe->colours[colour]);
 182     gdk_draw_line(fe->pixmap, fe->gc, x1, y1, x2, y2);
 183 }
 184
 185 void draw_polygon(frontend *fe, int *coords, int npoints,
 186                   int fill, int colour)
 187 {
 188     GdkPoint *points = snewn(npoints, GdkPoint);
 189     int i;
 190
 191     for (i = 0; i < npoints; i++) {
 192         points[i].x = coords[i*2];
 193         points[i].y = coords[i*2+1];
 194     }
 195
 196     gdk_gc_set_foreground(fe->gc, &fe->colours[colour]);
 197     gdk_draw_polygon(fe->pixmap, fe->gc, fill, points, npoints);
 198
 199     sfree(points);
 200 }
 201
 202 void draw_update(frontend *fe, int x, int y, int w, int h)
 203 {
 204     if (fe->bbox_l > x  ) fe->bbox_l = x  ;
 205     if (fe->bbox_r < x+w) fe->bbox_r = x+w;
 206     if (fe->bbox_u > y  ) fe->bbox_u = y  ;
 207     if (fe->bbox_d < y+h) fe->bbox_d = y+h;
 208 }
 209
 210 void end_draw(frontend *fe)
 211 {
 212     gdk_gc_unref(fe->gc);
 213     fe->gc = NULL;
 214
 215     if (fe->bbox_l < fe->bbox_r && fe->bbox_u < fe->bbox_d) {
 216         gdk_draw_pixmap(fe->area->window,
 217                         fe->area->style->fg_gc[GTK_WIDGET_STATE(fe->area)],
 218                         fe->pixmap,
 219                         fe->bbox_l, fe->bbox_u,
 220                         fe->bbox_l, fe->bbox_u,
 221                         fe->bbox_r - fe->bbox_l, fe->bbox_d - fe->bbox_u);
 222     }
 223 }
 224
 225 static void destroy(GtkWidget *widget, gpointer data)
 226 {
 227     gtk_main_quit();
 228 }
 229
 230 static gint key_event(GtkWidget *widget, GdkEventKey *event, gpointer data)
 231 {
 232     frontend *fe = (frontend *)data;
 233     int keyval;
 234
 235     if (!fe->pixmap)
 236         return TRUE;
 237
 238     if (event->string[0] && !event->string[1])
 239         keyval = (unsigned char)event->string[0];
 240     else if (event->keyval == GDK_Up || event->keyval == GDK_KP_Up ||
 241              event->keyval == GDK_KP_8)
 242         keyval = CURSOR_UP;
 243     else if (event->keyval == GDK_Down || event->keyval == GDK_KP_Down ||
 244              event->keyval == GDK_KP_2)
 245         keyval = CURSOR_DOWN;
 246     else if (event->keyval == GDK_Left || event->keyval == GDK_KP_Left ||
 247              event->keyval == GDK_KP_4)
 248         keyval = CURSOR_LEFT;
 249     else if (event->keyval == GDK_Right || event->keyval == GDK_KP_Right ||
 250              event->keyval == GDK_KP_6)
 251         keyval = CURSOR_RIGHT;
 252     else if (event->keyval == GDK_KP_Home || event->keyval == GDK_KP_7)
 253         keyval = CURSOR_UP_LEFT;
 254     else if (event->keyval == GDK_KP_End || event->keyval == GDK_KP_1)
 255         keyval = CURSOR_DOWN_LEFT;
 256     else if (event->keyval == GDK_KP_Page_Up || event->keyval == GDK_KP_9)
 257         keyval = CURSOR_UP_RIGHT;
 258     else if (event->keyval == GDK_KP_Page_Down || event->keyval == GDK_KP_3)
 259         keyval = CURSOR_DOWN_RIGHT;
 260     else
 261         keyval = -1;
 262
 263     if (keyval >= 0 &&
 264         !midend_process_key(fe->me, 0, 0, keyval))
 265         gtk_widget_destroy(fe->window);
 266
 267     return TRUE;
 268 }
 269
 270 static gint button_event(GtkWidget *widget, GdkEventButton *event,
 271                          gpointer data)
 272 {
 273     frontend *fe = (frontend *)data;
 274     int button;
 275
 276     if (!fe->pixmap)
 277         return TRUE;
 278
 279     if (event->type != GDK_BUTTON_PRESS)
 280         return TRUE;
 281
 282     if (event->button == 2 || (event->state & GDK_SHIFT_MASK))
 283         button = MIDDLE_BUTTON;
 284     else if (event->button == 1)
 285         button = LEFT_BUTTON;
 286     else if (event->button == 3)
 287         button = RIGHT_BUTTON;
 288     else
 289         return FALSE;                  /* don't even know what button! */
 290
 291     if (!midend_process_key(fe->me, event->x, event->y, button))
 292         gtk_widget_destroy(fe->window);
 293
 294     return TRUE;
 295 }
 296
 297 static gint expose_area(GtkWidget *widget, GdkEventExpose *event,
 298                         gpointer data)
 299 {
 300     frontend *fe = (frontend *)data;
 301
 302     if (fe->pixmap) {
 303         gdk_draw_pixmap(widget->window,
 304                         widget->style->fg_gc[GTK_WIDGET_STATE(widget)],
 305                         fe->pixmap,
 306                         event->area.x, event->area.y,
 307                         event->area.x, event->area.y,
 308                         event->area.width, event->area.height);
 309     }
 310     return TRUE;
 311 }
 312
 313 static gint map_window(GtkWidget *widget, GdkEvent *event,
 314                        gpointer data)
 315 {
 316     frontend *fe = (frontend *)data;
 317
 318     /*
 319      * Apparently we need to do this because otherwise the status
 320      * bar will fail to update immediately. Annoying, but there we
 321      * go.
 322      */
 323     gtk_widget_queue_draw(fe->window);
 324
 325     return TRUE;
 326 }
 327
 328 static gint configure_area(GtkWidget *widget,
 329                            GdkEventConfigure *event, gpointer data)
 330 {
 331     frontend *fe = (frontend *)data;
 332     GdkGC *gc;
 333
 334     if (fe->pixmap)
 335         gdk_pixmap_unref(fe->pixmap);
 336
 337     fe->pixmap = gdk_pixmap_new(widget->window, fe->w, fe->h, -1);
 338
 339     gc = gdk_gc_new(fe->area->window);
 340     gdk_gc_set_foreground(gc, &fe->colours[0]);
 341     gdk_draw_rectangle(fe->pixmap, gc, 1, 0, 0, fe->w, fe->h);
 342     gdk_gc_unref(gc);
 343
 344     midend_redraw(fe->me);
 345
 346     return TRUE;
 347 }
 348
 349 static gint timer_func(gpointer data)
 350 {
 351     frontend *fe = (frontend *)data;
 352
 353     if (fe->timer_active)
 354         midend_timer(fe->me, 0.02);    /* may clear timer_active */
 355
 356     return fe->timer_active;
 357 }
 358
 359 void deactivate_timer(frontend *fe)
 360 {
 361     if (fe->timer_active)
 362         gtk_timeout_remove(fe->timer_id);
 363     fe->timer_active = FALSE;
 364 }
 365
 366 void activate_timer(frontend *fe)
 367 {
 368     if (!fe->timer_active)
 369         fe->timer_id = gtk_timeout_add(20, timer_func, fe);
 370     fe->timer_active = TRUE;
 371 }
 372
 373 static void menu_key_event(GtkMenuItem *menuitem, gpointer data)
 374 {
 375     frontend *fe = (frontend *)data;
 376     int key = GPOINTER_TO_INT(gtk_object_get_data(GTK_OBJECT(menuitem),
 377                                                   "user-data"));
 378     if (!midend_process_key(fe->me, 0, 0, key))
 379         gtk_widget_destroy(fe->window);
 380 }
 381
 382 static void menu_preset_event(GtkMenuItem *menuitem, gpointer data)
 383 {
 384     frontend *fe = (frontend *)data;
 385     game_params *params =
 386         (game_params *)gtk_object_get_data(GTK_OBJECT(menuitem), "user-data");
 387     int x, y;
 388
 389     midend_set_params(fe->me, params);
 390     midend_new_game(fe->me, NULL);
 391     midend_size(fe->me, &x, &y);
 392     gtk_drawing_area_size(GTK_DRAWING_AREA(fe->area), x, y);
 393     fe->w = x;
 394     fe->h = y;
 395 }
 396
 397 static GtkWidget *add_menu_item_with_key(frontend *fe, GtkContainer *cont,
 398                                          char *text, int key)
 399 {
 400     GtkWidget *menuitem = gtk_menu_item_new_with_label(text);
 401     gtk_container_add(cont, menuitem);
 402     gtk_object_set_data(GTK_OBJECT(menuitem), "user-data",
 403                         GINT_TO_POINTER(key));
 404     gtk_signal_connect(GTK_OBJECT(menuitem), "activate",
 405                        GTK_SIGNAL_FUNC(menu_key_event), fe);
 406     gtk_widget_show(menuitem);
 407     return menuitem;
 408 }
 409
 410 static void add_menu_separator(GtkContainer *cont)
 411 {
 412     GtkWidget *menuitem = gtk_menu_item_new();
 413     gtk_container_add(cont, menuitem);
 414     gtk_widget_show(menuitem);
 415 }
 416
 417 static frontend *new_window(void)
 418 {
 419     frontend *fe;
 420     GtkBox *vbox;
 421     GtkWidget *menubar, *menu, *menuitem;
 422     int x, y, n;
 423
 424     fe = snew(frontend);
 425
 426     fe->me = midend_new(fe);
 427     midend_new_game(fe->me, NULL);
 428
 429     fe->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 430     gtk_window_set_title(GTK_WINDOW(fe->window), game_name);
 431 #if 0
 432     gtk_window_set_resizable(GTK_WINDOW(fe->window), FALSE);
 433 #else
 434     gtk_window_set_policy(GTK_WINDOW(fe->window), FALSE, FALSE, TRUE);
 435 #endif
 436     vbox = GTK_BOX(gtk_vbox_new(FALSE, 0));
 437     gtk_container_add(GTK_CONTAINER(fe->window), GTK_WIDGET(vbox));
 438     gtk_widget_show(GTK_WIDGET(vbox));
 439
 440     menubar = gtk_menu_bar_new();
 441     gtk_box_pack_start(vbox, menubar, FALSE, FALSE, 0);
 442     gtk_widget_show(menubar);
 443
 444     menuitem = gtk_menu_item_new_with_label("Game");
 445     gtk_container_add(GTK_CONTAINER(menubar), menuitem);
 446     gtk_widget_show(menuitem);
 447
 448     menu = gtk_menu_new();
 449     gtk_menu_item_set_submenu(GTK_MENU_ITEM(menuitem), menu);
 450
 451     add_menu_item_with_key(fe, GTK_CONTAINER(menu), "New", 'n');
 452     add_menu_item_with_key(fe, GTK_CONTAINER(menu), "Restart", 'r');
 453
 454     if ((n = midend_num_presets(fe->me)) > 0) {
 455         GtkWidget *submenu;
 456         int i;
 457
 458         menuitem = gtk_menu_item_new_with_label("Type");
 459         gtk_container_add(GTK_CONTAINER(menu), menuitem);
 460         gtk_widget_show(menuitem);
 461
 462         submenu = gtk_menu_new();
 463         gtk_menu_item_set_submenu(GTK_MENU_ITEM(menuitem), submenu);
 464
 465         for (i = 0; i < n; i++) {
 466             char *name;
 467             game_params *params;
 468
 469             midend_fetch_preset(fe->me, i, &name, &params);
 470
 471             menuitem = gtk_menu_item_new_with_label(name);
 472             gtk_container_add(GTK_CONTAINER(submenu), menuitem);
 473             gtk_object_set_data(GTK_OBJECT(menuitem), "user-data", params);
 474             gtk_signal_connect(GTK_OBJECT(menuitem), "activate",
 475                                GTK_SIGNAL_FUNC(menu_preset_event), fe);
 476             gtk_widget_show(menuitem);
 477         }
 478     }
 479
 480     add_menu_separator(GTK_CONTAINER(menu));
 481     add_menu_item_with_key(fe, GTK_CONTAINER(menu), "Undo", 'u');
 482     add_menu_item_with_key(fe, GTK_CONTAINER(menu), "Redo", '\x12');
 483     add_menu_separator(GTK_CONTAINER(menu));
 484     add_menu_item_with_key(fe, GTK_CONTAINER(menu), "Exit", 'q');
 485
 486     {
 487         int i, ncolours;
 488         float *colours;
 489         gboolean *success;
 490
 491         fe->colmap = gdk_colormap_get_system();
 492         colours = midend_colours(fe->me, &ncolours);
 493         fe->ncolours = ncolours;
 494         fe->colours = snewn(ncolours, GdkColor);
 495         for (i = 0; i < ncolours; i++) {
 496             fe->colours[i].red = colours[i*3] * 0xFFFF;
 497             fe->colours[i].green = colours[i*3+1] * 0xFFFF;
 498             fe->colours[i].blue = colours[i*3+2] * 0xFFFF;
 499         }
 500         success = snewn(ncolours, gboolean);
 501         gdk_colormap_alloc_colors(fe->colmap, fe->colours, ncolours,
 502                                   FALSE, FALSE, success);
 503         for (i = 0; i < ncolours; i++) {
 504             if (!success[i])
 505                 g_error("couldn't allocate colour %d (#%02x%02x%02x)\n",
 506                         i, fe->colours[i].red >> 8,
 507                         fe->colours[i].green >> 8,
 508                         fe->colours[i].blue >> 8);
 509         }
 510     }
 511
 512     if (midend_wants_statusbar(fe->me)) {
 513         GtkWidget *viewport;
 514         GtkRequisition req;
 515
 516         viewport = gtk_viewport_new(NULL, NULL);
 517         gtk_viewport_set_shadow_type(GTK_VIEWPORT(viewport), GTK_SHADOW_NONE);
 518         fe->statusbar = gtk_statusbar_new();
 519         gtk_container_add(GTK_CONTAINER(viewport), fe->statusbar);
 520         gtk_widget_show(viewport);
 521         gtk_box_pack_end(vbox, viewport, FALSE, FALSE, 0);
 522         gtk_widget_show(fe->statusbar);
 523         fe->statusctx = gtk_statusbar_get_context_id
 524             (GTK_STATUSBAR(fe->statusbar), "game");
 525         gtk_statusbar_push(GTK_STATUSBAR(fe->statusbar), fe->statusctx,
 526                            "test");
 527         gtk_widget_size_request(fe->statusbar, &req);
 528 #if 0
 529         /* For GTK 2.0, should we be using gtk_widget_set_size_request? */
 530 #endif
 531         gtk_widget_set_usize(viewport, x, req.height);
 532     } else
 533         fe->statusbar = NULL;
 534
 535     fe->area = gtk_drawing_area_new();
 536     midend_size(fe->me, &x, &y);
 537     gtk_drawing_area_size(GTK_DRAWING_AREA(fe->area), x, y);
 538     fe->w = x;
 539     fe->h = y;
 540
 541     gtk_box_pack_end(vbox, fe->area, FALSE, FALSE, 0);
 542
 543     fe->pixmap = NULL;
 544     fe->fonts = NULL;
 545     fe->nfonts = fe->fontsize = 0;
 546
 547     fe->timer_active = FALSE;
 548
 549     gtk_signal_connect(GTK_OBJECT(fe->window), "destroy",
 550                        GTK_SIGNAL_FUNC(destroy), fe);
 551     gtk_signal_connect(GTK_OBJECT(fe->window), "key_press_event",
 552                        GTK_SIGNAL_FUNC(key_event), fe);
 553     gtk_signal_connect(GTK_OBJECT(fe->area), "button_press_event",
 554                        GTK_SIGNAL_FUNC(button_event), fe);
 555     gtk_signal_connect(GTK_OBJECT(fe->area), "expose_event",
 556                        GTK_SIGNAL_FUNC(expose_area), fe);
 557     gtk_signal_connect(GTK_OBJECT(fe->window), "map_event",
 558                        GTK_SIGNAL_FUNC(map_window), fe);
 559     gtk_signal_connect(GTK_OBJECT(fe->area), "configure_event",
 560                        GTK_SIGNAL_FUNC(configure_area), fe);
 561
 562     gtk_widget_add_events(GTK_WIDGET(fe->area), GDK_BUTTON_PRESS_MASK);
 563
 564     gtk_widget_show(fe->area);
 565     gtk_widget_show(fe->window);
 566
 567     return fe;
 568 }
 569
 570 int main(int argc, char **argv)
 571 {
 572     srand(time(NULL));
 573
 574     gtk_init(&argc, &argv);
 575     (void) new_window();
 576     gtk_main();
 577
 578     return 0;
 579 }