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