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 configure_mainwin(struct app_state *state, 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         state->game = XtNameToWidget(gamearea, &tree_strtab[gameCanvas]);
 108         XtVaSetValues(gamearea, XmNleftAttachment, XmATTACH_FORM,
 109                                 XmNtopAttachment, XmATTACH_FORM,
 110                                 (char *)NULL);
 111
 112         state->goal = XtNameToWidget(goalarea, &tree_strtab[goalCanvas]);
 113         XtVaSetValues(goalarea, XmNleftAttachment, XmATTACH_WIDGET,
 114                                 XmNleftWidget, gamearea,
 115                                 XmNtopAttachment, XmATTACH_OPPOSITE_WIDGET,
 116                                 XmNtopWidget, gamearea,
 117                                 (char *)NULL);
 118
 119         resize_rec.string = "ResizeGameArea";
 120         resize_rec.proc = ResizeGameArea;
 121         XtAppAddActions(XtWidgetToApplicationContext(form), &resize_rec, 1);
 122         XtOverrideTranslations(form, XtParseTranslationTable(
 123                 "<Configure>: ResizeGameArea()\n"
 124                 "<Map>: ResizeGameArea()\n"
 125         ));
 126 }
 127
 128 static Widget create_widget(const struct ui_widget *item, Widget parent,
 129                             ArgList args, Cardinal num_args)
 130 {
 131         String name = (void *)&tree_strtab[item->name];
 132         WidgetClass class;
 133
 134         if (item->widget_type == widgetMenuBar)
 135                 return XmCreateMenuBar(parent, name, args, num_args);
 136
 137         assert(item->widget_type < widgetMax);
 138         class = *widgets[item->widget_type];
 139         return XtCreateWidget(name, class, parent, args, num_args);
 140 }
 141
 142 static void
 143 construct_widgets(const struct ui_widget *root, Widget parent, unsigned i)
 144 {
 145         const struct ui_widget *item;
 146
 147         for (item = &root[i]; item->name; item++) {
 148                 Widget w = create_widget(item, parent, NULL, 0);
 149
 150                 if (item->subtree)
 151                         construct_widgets(root, w, item->subtree);
 152
 153                 XtManageChild(w);
 154         }
 155 }
 156
 157 static void menu_cb(Widget w, void *data, void *cb_data)
 158 {
 159         XmRowColumnCallbackStruct *cbs = cb_data;
 160         XtCallActionProc(cbs->widget, XtName(cbs->widget), cbs->event, NULL, 0);
 161 }
 162
 163 static Widget create_pulldown(Widget parent)
 164 {
 165         Widget w;
 166
 167         w = XmCreatePulldownMenu(parent, XtName(parent), NULL, 0);
 168         XtVaSetValues(parent, XmNsubMenuId, w, (char *)NULL);
 169         XtAddCallback(w, XmNentryCallback, menu_cb, NULL);
 170
 171         return w;
 172 }
 173
 174 static void
 175 construct_menu(const struct ui_menuitem *root, Widget parent, unsigned i)
 176 {
 177         const struct ui_menuitem *item;
 178
 179         for (item = &root[i]; item->w.name; item++) {
 180                 const char *label = &strtab[item->label];
 181                 unsigned n = 0;
 182                 Arg args[2];
 183                 XmString s;
 184                 Widget w;
 185
 186                 if (XtClass(parent) == *widgets[widgetCascadeButton])
 187                         parent = create_pulldown(parent);
 188
 189                 if (label[0] && label[1] == '|') {
 190                         XtSetArg(args[n], XmNmnemonic, label[0]); n++;
 191                         label += 2;
 192                 }
 193
 194                 s = XmStringCreateLocalized((void *)label);
 195                 XtSetArg(args[n], XmNlabelString, s); n++;
 196
 197                 w = create_widget(&item->w, parent, args, n);
 198
 199                 XmStringFree(s);
 200
 201                 if (item->w.subtree)
 202                         construct_menu(root, w, item->w.subtree);
 203
 204                 XtManageChild(w);
 205         }
 206 }
 207
 208 static void game_resize(Widget w, void *data, void *cb_data)
 209 {
 210         if (XtIsRealized(w))
 211                 x11_redraw_game(data, -1);
 212 }
 213
 214 static void goal_resize(Widget w, void *data, void *cb_data)
 215 {
 216         if (XtIsRealized(w))
 217                 x11_redraw_goal(data, -1);
 218 }
 219
 220 /* Figure out which tiles intersect a rectangle. */
 221 static uint_fast32_t
 222 expose_mask(int rect_x, int rect_y, int rect_w, int rect_h,
 223                                     int tile_w, int tile_h)
 224 {
 225         return board_right(rect_x / tile_w)
 226              & board_below(rect_y / tile_h)
 227              & board_above((rect_y + rect_h - 1) / tile_h)
 228              & board_left((rect_x + rect_w - 1) / tile_w);
 229 }
 230
 231 static void game_expose(Widget w, void *data, void *cb_data)
 232 {
 233         XmDrawingAreaCallbackStruct *cbs = cb_data;
 234         XExposeEvent *e = &cbs->event->xexpose;
 235         Dimension width, height;
 236         uint_fast32_t mask;
 237
 238         XtVaGetValues(w, XmNwidth, &width, XmNheight, &height, (char *)NULL);
 239         if (!(width /= 5) || !(height /= 5))
 240                 return;
 241
 242         mask = expose_mask(e->x, e->y, e->width, e->height, width, height);
 243         x11_redraw_game(data, mask);
 244 }
 245
 246 static void goal_expose(Widget w, void *data, void *cb_data)
 247 {
 248         XmDrawingAreaCallbackStruct *cbs = cb_data;
 249         XExposeEvent *e = &cbs->event->xexpose;
 250         Dimension width, height;
 251         uint_fast32_t mask;
 252
 253         XtVaGetValues(w, XmNwidth, &width, XmNheight, &height, (char *)NULL);
 254         if (!(width /= 3) || !(height /= 3))
 255                 return;
 256
 257         mask = expose_mask(e->x, e->y, e->width, e->height, width, height);
 258         x11_redraw_goal(data, mask);
 259 }
 260
 261 void ui_initialize(struct app_state *state, Widget shell)
 262 {
 263         Widget menubar, help;
 264
 265         construct_widgets(mainwin, shell, 0);
 266
 267         menubar = XtNameToWidget(shell, "*menuBar");
 268         construct_menu(mainmenu, menubar, 0);
 269
 270         help = XtNameToWidget(menubar, "helpMenu");
 271         XtVaSetValues(menubar, XmNmenuHelpWidget, help, (char *)NULL);
 272
 273         configure_mainwin(state, XtNameToWidget(shell, "*game"));
 274         XtAddCallback(state->game, XmNresizeCallback, game_resize, state);
 275         XtAddCallback(state->game, XmNexposeCallback, game_expose, state);
 276         XtAddCallback(state->goal, XmNresizeCallback, goal_resize, state);
 277         XtAddCallback(state->goal, XmNexposeCallback, goal_expose, state);
 278 }