Pileus Git - grits/blob - src/gis-viewer.c

   1 /*
   2  * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
   3  *
   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.
   8  *
   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.
  13  *
  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/>.
  16  */
  17
  18 #include <config.h>
  19 #include <math.h>
  20 #include <gtk/gtk.h>
  21 #include <gdk/gdkkeysyms.h>
  22
  23 #include "gis-marshal.h"
  24 #include "gis-viewer.h"
  25
  26 #include "gis-util.h"
  27
  28
  29 /* Constants */
  30 enum {
  31         SIG_TIME_CHANGED,
  32         SIG_LOCATION_CHANGED,
  33         SIG_ROTATION_CHANGED,
  34         SIG_REFRESH,
  35         SIG_OFFLINE,
  36         NUM_SIGNALS,
  37 };
  38 static guint signals[NUM_SIGNALS];
  39
  40
  41 /***********
  42  * Helpers *
  43  ***********/
  44 /* Misc helpers */
  45 static void _gis_viewer_fix_location(GisViewer *self)
  46 {
  47         while (self->location[0] <  -90) self->location[0] += 180;
  48         while (self->location[0] >   90) self->location[0] -= 180;
  49         while (self->location[1] < -180) self->location[1] += 360;
  50         while (self->location[1] >  180) self->location[1] -= 360;
  51         self->location[2] = ABS(self->location[2]);
  52 }
  53
  54 /* Signal helpers */
  55 static void _gis_viewer_emit_location_changed(GisViewer *self)
  56 {
  57         g_signal_emit(self, signals[SIG_LOCATION_CHANGED], 0,
  58                         self->location[0],
  59                         self->location[1],
  60                         self->location[2]);
  61 }
  62 static void _gis_viewer_emit_rotation_changed(GisViewer *self)
  63 {
  64         g_signal_emit(self, signals[SIG_ROTATION_CHANGED], 0,
  65                         self->rotation[0],
  66                         self->rotation[1],
  67                         self->rotation[2]);
  68 }
  69 static void _gis_viewer_emit_time_changed(GisViewer *self)
  70 {
  71         g_signal_emit(self, signals[SIG_TIME_CHANGED], 0,
  72                         self->time);
  73 }
  74 static void _gis_viewer_emit_refresh(GisViewer *self)
  75 {
  76         g_signal_emit(self, signals[SIG_REFRESH], 0);
  77 }
  78 static void _gis_viewer_emit_offline(GisViewer *self)
  79 {
  80         g_signal_emit(self, signals[SIG_OFFLINE], 0,
  81                         self->offline);
  82 }
  83
  84 /*************
  85  * Callbacks *
  86  *************/
  87 static gboolean on_key_press(GisViewer *self, GdkEventKey *event, gpointer _)
  88 {
  89         g_debug("GisViewer: on_key_press - key=%x, state=%x, plus=%x",
  90                         event->keyval, event->state, GDK_plus);
  91
  92         double lat, lon, elev, pan;
  93         gis_viewer_get_location(self, &lat, &lon, &elev);
  94         pan = MIN(elev/(EARTH_R/2), 30);
  95         guint kv = event->keyval;
  96         gdk_threads_leave();
  97         if      (kv == GDK_Left  || kv == GDK_h) gis_viewer_pan(self,  0,  -pan, 0);
  98         else if (kv == GDK_Down  || kv == GDK_j) gis_viewer_pan(self, -pan, 0,   0);
  99         else if (kv == GDK_Up    || kv == GDK_k) gis_viewer_pan(self,  pan, 0,   0);
 100         else if (kv == GDK_Right || kv == GDK_l) gis_viewer_pan(self,  0,   pan, 0);
 101         else if (kv == GDK_minus || kv == GDK_o) gis_viewer_zoom(self, 10./9);
 102         else if (kv == GDK_plus  || kv == GDK_i) gis_viewer_zoom(self, 9./10);
 103         else if (kv == GDK_H) gis_viewer_rotate(self,  0, 0, -2);
 104         else if (kv == GDK_J) gis_viewer_rotate(self,  2, 0,  0);
 105         else if (kv == GDK_K) gis_viewer_rotate(self, -2, 0,  0);
 106         else if (kv == GDK_L) gis_viewer_rotate(self,  0, 0,  2);
 107         return FALSE;
 108 }
 109
 110 enum {
 111         GIS_DRAG_NONE,
 112         GIS_DRAG_PAN,
 113         GIS_DRAG_ZOOM,
 114         GIS_DRAG_TILT,
 115 };
 116
 117 static gboolean on_button_press(GisViewer *self, GdkEventButton *event, gpointer _)
 118 {
 119         g_debug("GisViewer: on_button_press - %d", event->button);
 120         gtk_widget_grab_focus(GTK_WIDGET(self));
 121         switch (event->button) {
 122         case 1:  self->drag_mode = GIS_DRAG_PAN;  break;
 123         case 2:  self->drag_mode = GIS_DRAG_ZOOM; break;
 124         case 3:  self->drag_mode = GIS_DRAG_TILT; break;
 125         defualt: self->drag_mode = GIS_DRAG_NONE; break;
 126         }
 127         self->drag_x = event->x;
 128         self->drag_y = event->y;
 129         return FALSE;
 130 }
 131
 132 static gboolean on_button_release(GisViewer *self, GdkEventButton *event, gpointer _)
 133 {
 134         g_debug("GisViewer: on_button_release");
 135         self->drag_mode = GIS_DRAG_NONE;
 136         return FALSE;
 137 }
 138
 139 static gboolean on_motion_notify(GisViewer *self, GdkEventMotion *event, gpointer _)
 140 {
 141         gdouble x_dist = self->drag_x - event->x;
 142         gdouble y_dist = self->drag_y - event->y;
 143         gdouble lat, lon, elev, scale;
 144         gis_viewer_get_location(GIS_VIEWER(self), &lat, &lon, &elev);
 145         scale = elev/EARTH_R/15;
 146         switch (self->drag_mode) {
 147         case GIS_DRAG_PAN:
 148                 gis_viewer_pan(self, -y_dist*scale, x_dist*scale, 0);
 149                 break;
 150         case GIS_DRAG_ZOOM:
 151                 gis_viewer_zoom(self, pow(2, -y_dist/500));
 152                 break;
 153         case GIS_DRAG_TILT:
 154                 gis_viewer_rotate(self, y_dist/10, 0, x_dist/10);
 155                 break;
 156         }
 157         self->drag_x = event->x;
 158         self->drag_y = event->y;
 159         return FALSE;
 160 }
 161
 162 static void on_view_changed(GisViewer *self,
 163                 gdouble _1, gdouble _2, gdouble _3)
 164 {
 165         gtk_widget_queue_draw(GTK_WIDGET(self));
 166 }
 167
 168 /***********
 169  * Methods *
 170  ***********/
 171 void gis_viewer_setup(GisViewer *self, GisPlugins *plugins, GisPrefs *prefs)
 172 {
 173         self->plugins = plugins;
 174         self->prefs   = prefs;
 175         self->offline = gis_prefs_get_boolean(prefs, "gis/offline", NULL);
 176 }
 177
 178 void gis_viewer_set_time(GisViewer *self, const char *time)
 179 {
 180         g_assert(GIS_IS_VIEWER(self));
 181         g_debug("GisViewer: set_time - time=%s", time);
 182         g_free(self->time);
 183         self->time = g_strdup(time);
 184         _gis_viewer_emit_time_changed(self);
 185 }
 186
 187 gchar *gis_viewer_get_time(GisViewer *self)
 188 {
 189         g_assert(GIS_IS_VIEWER(self));
 190         g_debug("GisViewer: get_time");
 191         return self->time;
 192 }
 193
 194 void gis_viewer_set_location(GisViewer *self, gdouble lat, gdouble lon, gdouble elev)
 195 {
 196         g_assert(GIS_IS_VIEWER(self));
 197         g_debug("GisViewer: set_location");
 198         self->location[0] = lat;
 199         self->location[1] = lon;
 200         self->location[2] = elev;
 201         _gis_viewer_fix_location(self);
 202         _gis_viewer_emit_location_changed(self);
 203 }
 204
 205 void gis_viewer_get_location(GisViewer *self, gdouble *lat, gdouble *lon, gdouble *elev)
 206 {
 207         g_assert(GIS_IS_VIEWER(self));
 208         //g_debug("GisViewer: get_location");
 209         *lat  = self->location[0];
 210         *lon  = self->location[1];
 211         *elev = self->location[2];
 212 }
 213
 214 void gis_viewer_pan(GisViewer *self, gdouble lat, gdouble lon, gdouble elev)
 215 {
 216         g_assert(GIS_IS_VIEWER(self));
 217         g_debug("GisViewer: pan - lat=%8.3f, lon=%8.3f, elev=%8.3f", lat, lon, elev);
 218         self->location[0] += lat;
 219         self->location[1] += lon;
 220         self->location[2] += elev;
 221         _gis_viewer_fix_location(self);
 222         _gis_viewer_emit_location_changed(self);
 223 }
 224
 225 void gis_viewer_zoom(GisViewer *self, gdouble scale)
 226 {
 227         g_assert(GIS_IS_VIEWER(self));
 228         g_debug("GisViewer: zoom");
 229         self->location[2] *= scale;
 230         _gis_viewer_emit_location_changed(self);
 231 }
 232
 233 void gis_viewer_set_rotation(GisViewer *self, gdouble x, gdouble y, gdouble z)
 234 {
 235         g_assert(GIS_IS_VIEWER(self));
 236         g_debug("GisViewer: set_rotation");
 237         self->rotation[0] = x;
 238         self->rotation[1] = y;
 239         self->rotation[2] = z;
 240         _gis_viewer_emit_rotation_changed(self);
 241 }
 242
 243 void gis_viewer_get_rotation(GisViewer *self, gdouble *x, gdouble *y, gdouble *z)
 244 {
 245         g_assert(GIS_IS_VIEWER(self));
 246         g_debug("GisViewer: get_rotation");
 247         *x = self->rotation[0];
 248         *y = self->rotation[1];
 249         *z = self->rotation[2];
 250 }
 251
 252 void gis_viewer_rotate(GisViewer *self, gdouble x, gdouble y, gdouble z)
 253 {
 254         g_assert(GIS_IS_VIEWER(self));
 255         g_debug("GisViewer: rotate - x=%.0f, y=%.0f, z=%.0f", x, y, z);
 256         self->rotation[0] += x;
 257         self->rotation[1] += y;
 258         self->rotation[2] += z;
 259         _gis_viewer_emit_rotation_changed(self);
 260 }
 261
 262 void gis_viewer_refresh(GisViewer *self)
 263 {
 264         g_debug("GisViewer: refresh");
 265         _gis_viewer_emit_refresh(self);
 266 }
 267
 268 void gis_viewer_set_offline(GisViewer *self, gboolean offline)
 269 {
 270         g_assert(GIS_IS_VIEWER(self));
 271         g_debug("GisViewer: set_offline - %d", offline);
 272         gis_prefs_set_boolean(self->prefs, "gis/offline", offline);
 273         self->offline = offline;
 274         _gis_viewer_emit_offline(self);
 275 }
 276
 277 gboolean gis_viewer_get_offline(GisViewer *self)
 278 {
 279         g_assert(GIS_IS_VIEWER(self));
 280         g_debug("GisViewer: get_offline - %d", self->offline);
 281         return self->offline;
 282 }
 283
 284 /* To be implemented by subclasses */
 285 void gis_viewer_center_position(GisViewer *self,
 286                 gdouble lat, gdouble lon, gdouble elev)
 287 {
 288         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 289         if (!klass->center_position)
 290                 g_warning("GisViewer: center_position - Unimplemented");
 291         klass->center_position(self, lat, lon, elev);
 292 }
 293
 294 void gis_viewer_project(GisViewer *self,
 295                 gdouble lat, gdouble lon, gdouble elev,
 296                 gdouble *px, gdouble *py, gdouble *pz)
 297 {
 298         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 299         if (!klass->project)
 300                 g_warning("GisViewer: project - Unimplemented");
 301         klass->project(self, lat, lon, elev, px, py, pz);
 302 }
 303
 304 void gis_viewer_clear_height_func(GisViewer *self)
 305 {
 306         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 307         if (!klass->clear_height_func)
 308                 g_warning("GisViewer: clear_height_func - Unimplemented");
 309         klass->clear_height_func(self);
 310 }
 311
 312 void gis_viewer_set_height_func(GisViewer *self, GisTile *tile,
 313                 GisHeightFunc height_func, gpointer user_data,
 314                 gboolean update)
 315 {
 316         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 317         if (!klass->set_height_func)
 318                 g_warning("GisViewer: set_height_func - Unimplemented");
 319         klass->set_height_func(self, tile, height_func, user_data, update);
 320 }
 321
 322 gpointer gis_viewer_add(GisViewer *self, GisObject *object,
 323                 gint level, gboolean sort)
 324 {
 325         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 326         if (!klass->add)
 327                 g_warning("GisViewer: add - Unimplemented");
 328         return klass->add(self, object, level, sort);
 329 }
 330
 331 GisObject *gis_viewer_remove(GisViewer *self, gpointer ref)
 332 {
 333         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 334         if (!klass->remove)
 335                 g_warning("GisViewer: remove - Unimplemented");
 336         return klass->remove(self, ref);
 337 }
 338
 339 /****************
 340  * GObject code *
 341  ****************/
 342 G_DEFINE_ABSTRACT_TYPE(GisViewer, gis_viewer, GTK_TYPE_DRAWING_AREA);
 343 static void gis_viewer_init(GisViewer *self)
 344 {
 345         g_debug("GisViewer: init");
 346         /* Default values */
 347         self->time = g_strdup("");
 348         self->location[0] = 40;
 349         self->location[1] = -100;
 350         self->location[2] = 1.5*EARTH_R;
 351         self->rotation[0] = 0;
 352         self->rotation[1] = 0;
 353         self->rotation[2] = 0;
 354
 355         g_object_set(self, "can-focus", TRUE, NULL);
 356         gtk_widget_add_events(GTK_WIDGET(self),
 357                         GDK_BUTTON_PRESS_MASK |
 358                         GDK_BUTTON_RELEASE_MASK |
 359                         GDK_POINTER_MOTION_MASK |
 360                         GDK_KEY_PRESS_MASK);
 361
 362         g_signal_connect(self, "key-press-event",      G_CALLBACK(on_key_press),      NULL);
 363
 364         g_signal_connect(self, "button-press-event",   G_CALLBACK(on_button_press),   NULL);
 365         g_signal_connect(self, "button-release-event", G_CALLBACK(on_button_release), NULL);
 366         g_signal_connect(self, "motion-notify-event",  G_CALLBACK(on_motion_notify),  NULL);
 367
 368         g_signal_connect(self, "location-changed",     G_CALLBACK(on_view_changed),   NULL);
 369         g_signal_connect(self, "rotation-changed",     G_CALLBACK(on_view_changed),   NULL);
 370 }
 371 static void gis_viewer_finalize(GObject *gobject)
 372 {
 373         g_debug("GisViewer: finalize");
 374         GisViewer *self = GIS_VIEWER(gobject);
 375         g_free(self->time);
 376         G_OBJECT_CLASS(gis_viewer_parent_class)->finalize(gobject);
 377 }
 378 static void gis_viewer_class_init(GisViewerClass *klass)
 379 {
 380         g_debug("GisViewer: class_init");
 381         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 382         gobject_class->finalize     = gis_viewer_finalize;
 383         signals[SIG_TIME_CHANGED] = g_signal_new(
 384                         "time-changed",
 385                         G_TYPE_FROM_CLASS(gobject_class),
 386                         G_SIGNAL_RUN_LAST,
 387                         0,
 388                         NULL,
 389                         NULL,
 390                         g_cclosure_marshal_VOID__STRING,
 391                         G_TYPE_NONE,
 392                         1,
 393                         G_TYPE_STRING);
 394         signals[SIG_LOCATION_CHANGED] = g_signal_new(
 395                         "location-changed",
 396                         G_TYPE_FROM_CLASS(gobject_class),
 397                         G_SIGNAL_RUN_LAST,
 398                         0,
 399                         NULL,
 400                         NULL,
 401                         gis_cclosure_marshal_VOID__DOUBLE_DOUBLE_DOUBLE,
 402                         G_TYPE_NONE,
 403                         3,
 404                         G_TYPE_DOUBLE,
 405                         G_TYPE_DOUBLE,
 406                         G_TYPE_DOUBLE);
 407         signals[SIG_ROTATION_CHANGED] = g_signal_new(
 408                         "rotation-changed",
 409                         G_TYPE_FROM_CLASS(gobject_class),
 410                         G_SIGNAL_RUN_LAST,
 411                         0,
 412                         NULL,
 413                         NULL,
 414                         gis_cclosure_marshal_VOID__DOUBLE_DOUBLE_DOUBLE,
 415                         G_TYPE_NONE,
 416                         3,
 417                         G_TYPE_DOUBLE,
 418                         G_TYPE_DOUBLE,
 419                         G_TYPE_DOUBLE);
 420         signals[SIG_REFRESH] = g_signal_new(
 421                         "refresh",
 422                         G_TYPE_FROM_CLASS(gobject_class),
 423                         G_SIGNAL_RUN_LAST,
 424                         0,
 425                         NULL,
 426                         NULL,
 427                         g_cclosure_marshal_VOID__VOID,
 428                         G_TYPE_NONE,
 429                         0);
 430         signals[SIG_OFFLINE] = g_signal_new(
 431                         "offline",
 432                         G_TYPE_FROM_CLASS(gobject_class),
 433                         G_SIGNAL_RUN_LAST,
 434                         0,
 435                         NULL,
 436                         NULL,
 437                         g_cclosure_marshal_VOID__BOOLEAN,
 438                         G_TYPE_NONE,
 439                         1,
 440                         G_TYPE_BOOLEAN);
 441 }