src/motif_ui.c

   1 /*
   2  * X11 GUI for slide puzzle game
   3  * Copyright © 2022 Nick Bowler
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <config.h>
  20 #include <inttypes.h>
  21 #include <assert.h>
  22 #include <Xm/XmAll.h>
  23
  24 #include "motif.h"
  25 #include "motifstr.h"
  26 #include "motifgui.h"
  27
  28 #define SPLIT_NUMERATOR    75
  29 #define SPLIT_DENOMINATOR 100
  30
  31 #define MIN(a, b) ((a) < (b) ? (a) : (b))
  32
  33 /* XXX generate this list? */
  34 enum {
  35         widgetMainWindow,
  36         widgetForm,
  37         widgetFrame,
  38         widgetDrawingArea,
  39         widgetCascadeButton,
  40         widgetPushButton,
  41         widgetMax,
  42
  43         /* Pseudo-widgets */
  44         widgetMenuBar = widgetMax
  45 };
  46
  47 static WidgetClass * const widgets[widgetMax] = {
  48         &xmMainWindowWidgetClass,
  49         &xmFormWidgetClass,
  50         &xmFrameWidgetClass,
  51         &xmDrawingAreaWidgetClass,
  52         &xmCascadeButtonWidgetClass,
  53         &xmPushButtonWidgetClass
  54 };
  55
  56 static const struct ui_widget {
  57         uint_least16_t name;
  58         uint_least8_t subtree;
  59         uint_least8_t widget_type;
  60 } mainwin[] = { MAINWIN_INITIALIZER };
  61
  62 static const struct ui_menuitem {
  63         struct ui_widget w;
  64         uint_least16_t label;
  65 } mainmenu[] = { MAINMENU_INITIALIZER };
  66
  67 static void
  68 ResizeGameArea(Widget form, XEvent *e, String *args, Cardinal *num_args)
  69 {
  70         Widget game = XtNameToWidget(form, &tree_strtab[gameArea]);
  71         Widget goal = XtNameToWidget(form, &tree_strtab[goalArea]);
  72         Dimension w, h, gamesz, gameborder, goalsz, goalborder;
  73         int x, y, gap;
  74
  75         XtVaGetValues(form, XmNwidth, &w, XmNheight, &h, (char *)NULL);
  76         XtVaGetValues(game, XmNshadowThickness, &gameborder, (char *)NULL);
  77         XtVaGetValues(goal, XmNshadowThickness, &goalborder,
  78                             XmNleftOffset, &gap,
  79                             (char *)NULL);
  80
  81         gamesz = MIN(h, w * SPLIT_NUMERATOR / SPLIT_DENOMINATOR);
  82         gamesz = 5*( (gamesz - 2*gameborder)/5 ) + 2*gameborder;
  83
  84         goalsz = MIN(gamesz*3/5, w - gamesz - gap);
  85         goalsz = 3*( (goalsz - 2*goalborder)/3 ) + 2*goalborder;
  86
  87         x = (w - gamesz - goalsz - gap) / 2;
  88         if (x < 2) x = 0;
  89
  90         y = (h - gamesz) / 2;
  91         if (y < 3) y = 0;
  92
  93         XtVaSetValues(game, XmNleftOffset, x, XmNtopOffset, y, (char *)NULL);
  94         XtVaSetValues(game, XmNwidth, gamesz, XmNheight, gamesz, (char *)NULL);
  95         XtVaSetValues(goal, XmNwidth, goalsz, XmNheight, goalsz, (char *)NULL);
  96 }
  97
  98 static void game_configure(Widget form)
  99 {
 100         Widget gamearea = XtNameToWidget(form, &tree_strtab[gameArea]);
 101         Widget goalarea = XtNameToWidget(form, &tree_strtab[goalArea]);
 102         XtActionsRec resize_rec;
 103
 104         assert(gamearea && goalarea);
 105         XtVaSetValues(form, XmNfractionBase, SPLIT_DENOMINATOR, (char *)NULL);
 106
 107         XtVaSetValues(gamearea, XmNleftAttachment, XmATTACH_FORM,
 108                                 XmNtopAttachment, XmATTACH_FORM,
 109                                 (char *)NULL);
 110
 111         XtVaSetValues(goalarea, XmNleftAttachment, XmATTACH_WIDGET,
 112                                 XmNleftWidget, gamearea,
 113                                 XmNtopAttachment, XmATTACH_OPPOSITE_WIDGET,
 114                                 XmNtopWidget, gamearea,
 115                                 (char *)NULL);
 116
 117         resize_rec.string = "ResizeGameArea";
 118         resize_rec.proc = ResizeGameArea;
 119         XtAppAddActions(XtWidgetToApplicationContext(form), &resize_rec, 1);
 120         XtOverrideTranslations(form, XtParseTranslationTable(
 121                 "<Configure>: ResizeGameArea()\n"
 122                 "<Map>: ResizeGameArea()\n"
 123         ));
 124 }
 125
 126 static Widget create_widget(const struct ui_widget *item, Widget parent,
 127                             ArgList args, Cardinal num_args)
 128 {
 129         String name = (void *)&tree_strtab[item->name];
 130         WidgetClass class;
 131
 132         if (item->widget_type == widgetMenuBar)
 133                 return XmCreateMenuBar(parent, name, args, num_args);
 134
 135         assert(item->widget_type < widgetMax);
 136         class = *widgets[item->widget_type];
 137         return XtCreateWidget(name, class, parent, args, num_args);
 138 }
 139
 140 static void
 141 construct_widgets(const struct ui_widget *root, Widget parent, unsigned i)
 142 {
 143         const struct ui_widget *item;
 144
 145         for (item = &root[i]; item->name; item++) {
 146                 Widget w = create_widget(item, parent, NULL, 0);
 147
 148                 if (item->subtree)
 149                         construct_widgets(root, w, item->subtree);
 150
 151                 XtManageChild(w);
 152         }
 153 }
 154
 155 static void menu_cb(Widget w, void *data, void *cb_data)
 156 {
 157         XmRowColumnCallbackStruct *cbs = cb_data;
 158         XtCallActionProc(cbs->widget, XtName(cbs->widget), cbs->event, NULL, 0);
 159 }
 160
 161 static Widget create_pulldown(Widget parent)
 162 {
 163         Widget w;
 164
 165         w = XmCreatePulldownMenu(parent, XtName(parent), NULL, 0);
 166         XtVaSetValues(parent, XmNsubMenuId, w, (char *)NULL);
 167         XtAddCallback(w, XmNentryCallback, menu_cb, NULL);
 168
 169         return w;
 170 }
 171
 172 static void
 173 construct_menu(const struct ui_menuitem *root, Widget parent, unsigned i)
 174 {
 175         const struct ui_menuitem *item;
 176
 177         for (item = &root[i]; item->w.name; item++) {
 178                 const char *label = &strtab[item->label];
 179                 unsigned n = 0;
 180                 Arg args[2];
 181                 XmString s;
 182                 Widget w;
 183
 184                 if (XtClass(parent) == *widgets[widgetCascadeButton])
 185                         parent = create_pulldown(parent);
 186
 187                 if (label[0] && label[1] == '|') {
 188                         XtSetArg(args[n], XmNmnemonic, label[0]); n++;
 189                         label += 2;
 190                 }
 191
 192                 s = XmStringCreateLocalized((void *)label);
 193                 XtSetArg(args[n], XmNlabelString, s); n++;
 194
 195                 w = create_widget(&item->w, parent, args, n);
 196
 197                 XmStringFree(s);
 198
 199                 if (item->w.subtree)
 200                         construct_menu(root, w, item->w.subtree);
 201
 202                 XtManageChild(w);
 203         }
 204 }
 205
 206 static void game_resize(Widget w, void *data, void *cb_data)
 207 {
 208         if (XtIsRealized(w))
 209                 x11_redraw_game(data, -1);
 210 }
 211
 212 static void goal_resize(Widget w, void *data, void *cb_data)
 213 {
 214         if (XtIsRealized(w))
 215                 x11_redraw_goal(data, -1);
 216 }
 217
 218 static void do_input_move(struct app_state *state, int x, int y)
 219 {
 220         uint_fast32_t mask;
 221
 222         if ((mask = game_do_move(&state->board, x, y)) != 0) {
 223                 if (game_check_goal(&state->board) == 0) {
 224                         int_fast32_t ms = game_finish(&state->board);
 225                         unsigned min, sec;
 226
 227                         /* Negative time just means clock jumps and
 228                          * display headaches. */
 229                         if (ms < 0)
 230                                 ms = 0;
 231
 232                         sec = ms / 1000, ms %= 1000;
 233                         min = sec / 60, sec %= 60;
 234                         printf("You won!  Time was %u:%.2u:%.3u\n",
 235                                min, sec, (unsigned)ms);
 236                         mask |= ~GOAL_MASK;
 237                 }
 238
 239                 x11_redraw_game(state, mask);
 240         }
 241 }
 242
 243 static void set_view_goal(struct app_state *state, int view_goal)
 244 {
 245         state->view_goal_on_game = view_goal;
 246         x11_redraw_game(state, game_check_goal(&state->board));
 247 }
 248
 249 static void game_input(Widget w, void *data, void *cb_data)
 250 {
 251         XmDrawingAreaCallbackStruct *cbs = cb_data;
 252         XButtonEvent *b = &cbs->event->xbutton;
 253         struct app_state *state = data;
 254         Dimension width, height;
 255
 256         switch (cbs->event->type) {
 257         case ButtonPress:
 258                 switch (b->button) {
 259                 case Button1:
 260                         if (b->state & Button3Mask)
 261                                 break;
 262
 263                         XtVaGetValues(w, XmNwidth, &width,
 264                                          XmNheight, &height,
 265                                          (char *)NULL);
 266
 267                         do_input_move(state, b->x / (width / 5),
 268                                              b->y / (height / 5));
 269                         break;
 270                 case Button3:
 271                         set_view_goal(state, 1);
 272                         break;
 273                 }
 274                 break;
 275         case ButtonRelease:
 276                 switch (b->button) {
 277                 case Button3:
 278                         set_view_goal(state, 0);
 279                         break;
 280                 }
 281         }
 282 }
 283
 284 /* Figure out which tiles intersect a rectangle. */
 285 static uint_fast32_t
 286 expose_mask(int rect_x, int rect_y, int rect_w, int rect_h,
 287                                     int tile_w, int tile_h)
 288 {
 289         return board_right(rect_x / tile_w)
 290              & board_below(rect_y / tile_h)
 291              & board_above((rect_y + rect_h - 1) / tile_h)
 292              & board_left((rect_x + rect_w - 1) / tile_w);
 293 }
 294
 295 static void game_expose(Widget w, void *data, void *cb_data)
 296 {
 297         XmDrawingAreaCallbackStruct *cbs = cb_data;
 298         XExposeEvent *e = &cbs->event->xexpose;
 299         Dimension width, height;
 300         uint_fast32_t mask;
 301
 302         XtVaGetValues(w, XmNwidth, &width, XmNheight, &height, (char *)NULL);
 303         if (!(width /= 5) || !(height /= 5))
 304                 return;
 305
 306         mask = expose_mask(e->x, e->y, e->width, e->height, width, height);
 307         x11_redraw_game(data, mask);
 308 }
 309
 310 static void goal_expose(Widget w, void *data, void *cb_data)
 311 {
 312         XmDrawingAreaCallbackStruct *cbs = cb_data;
 313         XExposeEvent *e = &cbs->event->xexpose;
 314         Dimension width, height;
 315         uint_fast32_t mask;
 316
 317         XtVaGetValues(w, XmNwidth, &width, XmNheight, &height, (char *)NULL);
 318         if (!(width /= 3) || !(height /= 3))
 319                 return;
 320
 321         mask = expose_mask(e->x, e->y, e->width, e->height, width, height);
 322         x11_redraw_goal(data, mask);
 323 }
 324
 325 void ui_initialize(struct app_state *state, Widget shell)
 326 {
 327         Widget menubar, help;
 328
 329         construct_widgets(mainwin, shell, 0);
 330
 331         menubar = XtNameToWidget(shell, "*menuBar");
 332         construct_menu(mainmenu, menubar, 0);
 333
 334         help = XtNameToWidget(menubar, "helpMenu");
 335         XtVaSetValues(menubar, XmNmenuHelpWidget, help, (char *)NULL);
 336
 337         game_configure(XtNameToWidget(shell, "*game"));
 338
 339         state->game = XtNameToWidget(shell, "*gameCanvas");
 340         XtAddCallback(state->game, XmNresizeCallback, game_resize, state);
 341         XtAddCallback(state->game, XmNexposeCallback, game_expose, state);
 342         XtAddCallback(state->game, XmNinputCallback,  game_input,  state);
 343
 344         state->goal = XtNameToWidget(shell, "*goalCanvas");
 345         XtAddCallback(state->goal, XmNresizeCallback, goal_resize, state);
 346         XtAddCallback(state->goal, XmNexposeCallback, goal_expose, state);
 347 }