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

   1 /*
   2  * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
   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 <gtk/gtk.h>
  20 #include <gdk/gdkkeysyms.h>
  21
  22 #include "gis-marshal.h"
  23 #include "gis-viewer.h"
  24
  25 #include "gis-util.h"
  26
  27
  28 /* Constants */
  29 enum {
  30         SIG_TIME_CHANGED,
  31         SIG_SITE_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_site_changed(GisViewer *self)
  75 {
  76         g_signal_emit(self, signals[SIG_SITE_CHANGED], 0,
  77                         self->site);
  78 }
  79 static void _gis_viewer_emit_refresh(GisViewer *self)
  80 {
  81         g_signal_emit(self, signals[SIG_REFRESH], 0);
  82 }
  83 static void _gis_viewer_emit_offline(GisViewer *self)
  84 {
  85         g_signal_emit(self, signals[SIG_OFFLINE], 0,
  86                         self->offline);
  87 }
  88
  89 /*************
  90  * Callbacks *
  91  *************/
  92 static gboolean on_button_press(GisViewer *self, GdkEventButton *event, gpointer _)
  93 {
  94         g_debug("GisViewer: on_button_press - Grabbing focus");
  95         gtk_widget_grab_focus(GTK_WIDGET(self));
  96         return TRUE;
  97 }
  98 static gboolean on_key_press(GisViewer *self, GdkEventKey *event, gpointer _)
  99 {
 100         g_debug("GisViewer: on_key_press - key=%x, state=%x, plus=%x",
 101                         event->keyval, event->state, GDK_plus);
 102
 103         double lat, lon, elev, pan;
 104         gis_viewer_get_location(self, &lat, &lon, &elev);
 105         pan = MIN(elev/(EARTH_R/2), 30);
 106         guint kv = event->keyval;
 107         gdk_threads_leave();
 108         if      (kv == GDK_Left  || kv == GDK_h) gis_viewer_pan(self,  0,  -pan, 0);
 109         else if (kv == GDK_Down  || kv == GDK_j) gis_viewer_pan(self, -pan, 0,   0);
 110         else if (kv == GDK_Up    || kv == GDK_k) gis_viewer_pan(self,  pan, 0,   0);
 111         else if (kv == GDK_Right || kv == GDK_l) gis_viewer_pan(self,  0,   pan, 0);
 112         else if (kv == GDK_minus || kv == GDK_o) gis_viewer_zoom(self, 10./9);
 113         else if (kv == GDK_plus  || kv == GDK_i) gis_viewer_zoom(self, 9./10);
 114         else if (kv == GDK_H) gis_viewer_rotate(self,  0, 0, -2);
 115         else if (kv == GDK_J) gis_viewer_rotate(self,  2, 0,  0);
 116         else if (kv == GDK_K) gis_viewer_rotate(self, -2, 0,  0);
 117         else if (kv == GDK_L) gis_viewer_rotate(self,  0, 0,  2);
 118         return FALSE;
 119 }
 120 static void on_view_changed(GisViewer *self,
 121                 gdouble _1, gdouble _2, gdouble _3)
 122 {
 123         gtk_widget_queue_draw(GTK_WIDGET(self));
 124 }
 125
 126 /***********
 127  * Methods *
 128  ***********/
 129 void gis_viewer_set_time(GisViewer *self, const char *time)
 130 {
 131         g_assert(GIS_IS_VIEWER(self));
 132         g_debug("GisViewer: set_time - time=%s", time);
 133         g_free(self->time);
 134         self->time = g_strdup(time);
 135         _gis_viewer_emit_time_changed(self);
 136 }
 137
 138 gchar *gis_viewer_get_time(GisViewer *self)
 139 {
 140         g_assert(GIS_IS_VIEWER(self));
 141         g_debug("GisViewer: get_time");
 142         return self->time;
 143 }
 144
 145 void gis_viewer_set_location(GisViewer *self, gdouble lat, gdouble lon, gdouble elev)
 146 {
 147         g_assert(GIS_IS_VIEWER(self));
 148         g_debug("GisViewer: set_location");
 149         self->location[0] = lat;
 150         self->location[1] = lon;
 151         self->location[2] = elev;
 152         _gis_viewer_fix_location(self);
 153         _gis_viewer_emit_location_changed(self);
 154 }
 155
 156 void gis_viewer_get_location(GisViewer *self, gdouble *lat, gdouble *lon, gdouble *elev)
 157 {
 158         g_assert(GIS_IS_VIEWER(self));
 159         //g_debug("GisViewer: get_location");
 160         *lat  = self->location[0];
 161         *lon  = self->location[1];
 162         *elev = self->location[2];
 163 }
 164
 165 void gis_viewer_pan(GisViewer *self, gdouble lat, gdouble lon, gdouble elev)
 166 {
 167         g_assert(GIS_IS_VIEWER(self));
 168         g_debug("GisViewer: pan - lat=%8.3f, lon=%8.3f, elev=%8.3f", lat, lon, elev);
 169         self->location[0] += lat;
 170         self->location[1] += lon;
 171         self->location[2] += elev;
 172         _gis_viewer_fix_location(self);
 173         _gis_viewer_emit_location_changed(self);
 174 }
 175
 176 void gis_viewer_zoom(GisViewer *self, gdouble scale)
 177 {
 178         g_assert(GIS_IS_VIEWER(self));
 179         g_debug("GisViewer: zoom");
 180         self->location[2] *= scale;
 181         _gis_viewer_emit_location_changed(self);
 182 }
 183
 184 void gis_viewer_set_rotation(GisViewer *self, gdouble x, gdouble y, gdouble z)
 185 {
 186         g_assert(GIS_IS_VIEWER(self));
 187         g_debug("GisViewer: set_rotation");
 188         self->rotation[0] = x;
 189         self->rotation[1] = y;
 190         self->rotation[2] = z;
 191         _gis_viewer_emit_rotation_changed(self);
 192 }
 193
 194 void gis_viewer_get_rotation(GisViewer *self, gdouble *x, gdouble *y, gdouble *z)
 195 {
 196         g_assert(GIS_IS_VIEWER(self));
 197         g_debug("GisViewer: get_rotation");
 198         *x = self->rotation[0];
 199         *y = self->rotation[1];
 200         *z = self->rotation[2];
 201 }
 202
 203 void gis_viewer_rotate(GisViewer *self, gdouble x, gdouble y, gdouble z)
 204 {
 205         g_assert(GIS_IS_VIEWER(self));
 206         g_debug("GisViewer: rotate - x=%.0f, y=%.0f, z=%.0f", x, y, z);
 207         self->rotation[0] += x;
 208         self->rotation[1] += y;
 209         self->rotation[2] += z;
 210         _gis_viewer_emit_rotation_changed(self);
 211 }
 212
 213 /* To be deprecated, use {get,set}_location */
 214 void gis_viewer_set_site(GisViewer *self, const gchar *site)
 215 {
 216         g_assert(GIS_IS_VIEWER(self));
 217         g_debug("GisViewer: set_site");
 218         g_free(self->site);
 219         self->site = g_strdup(site);
 220         _gis_viewer_emit_site_changed(self);
 221 }
 222
 223 gchar *gis_viewer_get_site(GisViewer *self)
 224 {
 225         g_assert(GIS_IS_VIEWER(self));
 226         g_debug("GisViewer: get_site - %s", self->site);
 227         return self->site;
 228 }
 229
 230 void gis_viewer_refresh(GisViewer *self)
 231 {
 232         g_debug("GisViewer: refresh");
 233         _gis_viewer_emit_refresh(self);
 234 }
 235
 236 void gis_viewer_set_offline(GisViewer *self, gboolean offline)
 237 {
 238         g_assert(GIS_IS_VIEWER(self));
 239         g_debug("GisViewer: set_offline - %d", offline);
 240         self->offline = offline;
 241         _gis_viewer_emit_offline(self);
 242 }
 243
 244 gboolean gis_viewer_get_offline(GisViewer *self)
 245 {
 246         g_assert(GIS_IS_VIEWER(self));
 247         g_debug("GisViewer: get_offline - %d", self->offline);
 248         return self->offline;
 249 }
 250
 251 /* To be implemented by subclasses */
 252 void gis_viewer_center_position(GisViewer *self,
 253                 gdouble lat, gdouble lon, gdouble elev)
 254 {
 255         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 256         if (!klass->center_position)
 257                 g_warning("GisViewer: center_position - Unimplemented");
 258         klass->center_position(self, lat, lon, elev);
 259 }
 260
 261 void gis_viewer_project(GisViewer *self,
 262                 gdouble lat, gdouble lon, gdouble elev,
 263                 gdouble *px, gdouble *py, gdouble *pz)
 264 {
 265         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 266         if (!klass->project)
 267                 g_warning("GisViewer: project - Unimplemented");
 268         klass->project(self, lat, lon, elev, px, py, pz);
 269 }
 270
 271 void gis_viewer_clear_height_func(GisViewer *self)
 272 {
 273         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 274         if (!klass->clear_height_func)
 275                 g_warning("GisViewer: clear_height_func - Unimplemented");
 276         klass->clear_height_func(self);
 277 }
 278
 279 void gis_viewer_set_height_func(GisViewer *self, GisTile *tile,
 280                 GisHeightFunc height_func, gpointer user_data,
 281                 gboolean update)
 282 {
 283         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 284         if (!klass->set_height_func)
 285                 g_warning("GisViewer: set_height_func - Unimplemented");
 286         klass->set_height_func(self, tile, height_func, user_data, update);
 287 }
 288
 289 void gis_viewer_render_tile(GisViewer *self, GisTile *tile)
 290 {
 291         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 292         if (!klass->render_tile)
 293                 g_warning("GisViewer: render_tile - Unimplemented");
 294         klass->render_tile(self, tile);
 295 }
 296
 297 void gis_viewer_render_tiles(GisViewer *self, GisTile *root)
 298 {
 299         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 300         if (!klass->render_tiles)
 301                 g_warning("GisViewer: render_tiles - Unimplemented");
 302         klass->render_tiles(self, root);
 303 }
 304
 305 void gis_viewer_begin(GisViewer *self)
 306 {
 307         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 308         if (!klass->begin)
 309                 g_warning("GisViewer: begin - Unimplemented");
 310         klass->begin(self);
 311 }
 312
 313 void gis_viewer_end(GisViewer *self)
 314 {
 315         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 316         if (!klass->end)
 317                 g_warning("GisViewer: end - Unimplemented");
 318         klass->end(self);
 319 }
 320
 321 void gis_viewer_add(GisViewer *self, GisObject *object)
 322 {
 323         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 324         if (!klass->add)
 325                 g_warning("GisViewer: add - Unimplemented");
 326         klass->add(self, object);
 327 }
 328
 329 void gis_viewer_remove(GisViewer *self, GisObject *object)
 330 {
 331         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 332         if (!klass->remove)
 333                 g_warning("GisViewer: remove - Unimplemented");
 334         klass->remove(self, object);
 335 }
 336
 337 /****************
 338  * GObject code *
 339  ****************/
 340 G_DEFINE_ABSTRACT_TYPE(GisViewer, gis_viewer, GTK_TYPE_DRAWING_AREA);
 341 static void gis_viewer_init(GisViewer *self)
 342 {
 343         g_debug("GisViewer: init");
 344         /* Default values */
 345         self->time = g_strdup("");
 346         self->site = g_strdup("");
 347         self->location[0] = 40;
 348         self->location[1] = -100;
 349         self->location[2] = 1.5*EARTH_R;
 350         self->rotation[0] = 0;
 351         self->rotation[1] = 0;
 352         self->rotation[2] = 0;
 353
 354         g_signal_connect(self, "key-press-event",    G_CALLBACK(on_key_press),    NULL);
 355         g_signal_connect(self, "button-press-event", G_CALLBACK(on_button_press), NULL);
 356
 357         g_signal_connect(self, "location-changed",   G_CALLBACK(on_view_changed), NULL);
 358         g_signal_connect(self, "rotation-changed",   G_CALLBACK(on_view_changed), NULL);
 359 }
 360 static void gis_viewer_finalize(GObject *gobject)
 361 {
 362         g_debug("GisViewer: finalize");
 363         GisViewer *self = GIS_VIEWER(gobject);
 364         g_free(self->time);
 365         g_free(self->site);
 366         G_OBJECT_CLASS(gis_viewer_parent_class)->finalize(gobject);
 367 }
 368 static void gis_viewer_class_init(GisViewerClass *klass)
 369 {
 370         g_debug("GisViewer: class_init");
 371         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 372         gobject_class->finalize     = gis_viewer_finalize;
 373         signals[SIG_TIME_CHANGED] = g_signal_new(
 374                         "time-changed",
 375                         G_TYPE_FROM_CLASS(gobject_class),
 376                         G_SIGNAL_RUN_LAST,
 377                         0,
 378                         NULL,
 379                         NULL,
 380                         g_cclosure_marshal_VOID__STRING,
 381                         G_TYPE_NONE,
 382                         1,
 383                         G_TYPE_STRING);
 384         signals[SIG_SITE_CHANGED] = g_signal_new(
 385                         "site-changed",
 386                         G_TYPE_FROM_CLASS(gobject_class),
 387                         G_SIGNAL_RUN_LAST,
 388                         0,
 389                         NULL,
 390                         NULL,
 391                         g_cclosure_marshal_VOID__STRING,
 392                         G_TYPE_NONE,
 393                         1,
 394                         G_TYPE_STRING);
 395         signals[SIG_LOCATION_CHANGED] = g_signal_new(
 396                         "location-changed",
 397                         G_TYPE_FROM_CLASS(gobject_class),
 398                         G_SIGNAL_RUN_LAST,
 399                         0,
 400                         NULL,
 401                         NULL,
 402                         gis_cclosure_marshal_VOID__DOUBLE_DOUBLE_DOUBLE,
 403                         G_TYPE_NONE,
 404                         3,
 405                         G_TYPE_DOUBLE,
 406                         G_TYPE_DOUBLE,
 407                         G_TYPE_DOUBLE);
 408         signals[SIG_ROTATION_CHANGED] = g_signal_new(
 409                         "rotation-changed",
 410                         G_TYPE_FROM_CLASS(gobject_class),
 411                         G_SIGNAL_RUN_LAST,
 412                         0,
 413                         NULL,
 414                         NULL,
 415                         gis_cclosure_marshal_VOID__DOUBLE_DOUBLE_DOUBLE,
 416                         G_TYPE_NONE,
 417                         3,
 418                         G_TYPE_DOUBLE,
 419                         G_TYPE_DOUBLE,
 420                         G_TYPE_DOUBLE);
 421         signals[SIG_REFRESH] = g_signal_new(
 422                         "refresh",
 423                         G_TYPE_FROM_CLASS(gobject_class),
 424                         G_SIGNAL_RUN_LAST,
 425                         0,
 426                         NULL,
 427                         NULL,
 428                         g_cclosure_marshal_VOID__VOID,
 429                         G_TYPE_NONE,
 430                         0);
 431         signals[SIG_OFFLINE] = g_signal_new(
 432                         "offline",
 433                         G_TYPE_FROM_CLASS(gobject_class),
 434                         G_SIGNAL_RUN_LAST,
 435                         0,
 436                         NULL,
 437                         NULL,
 438                         g_cclosure_marshal_VOID__BOOLEAN,
 439                         G_TYPE_NONE,
 440                         1,
 441                         G_TYPE_BOOLEAN);
 442 }