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_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_set_time(GisViewer *self, const char *time)
 124 {
 125         g_assert(GIS_IS_VIEWER(self));
 126         g_debug("GisViewer: set_time - time=%s", time);
 127         g_free(self->time);
 128         self->time = g_strdup(time);
 129         _gis_viewer_emit_time_changed(self);
 130 }
 131
 132 gchar *gis_viewer_get_time(GisViewer *self)
 133 {
 134         g_assert(GIS_IS_VIEWER(self));
 135         g_debug("GisViewer: get_time");
 136         return self->time;
 137 }
 138
 139 void gis_viewer_set_location(GisViewer *self, gdouble lat, gdouble lon, gdouble elev)
 140 {
 141         g_assert(GIS_IS_VIEWER(self));
 142         g_debug("GisViewer: set_location");
 143         self->location[0] = lat;
 144         self->location[1] = lon;
 145         self->location[2] = elev;
 146         _gis_viewer_fix_location(self);
 147         _gis_viewer_emit_location_changed(self);
 148 }
 149
 150 void gis_viewer_get_location(GisViewer *self, gdouble *lat, gdouble *lon, gdouble *elev)
 151 {
 152         g_assert(GIS_IS_VIEWER(self));
 153         //g_debug("GisViewer: get_location");
 154         *lat  = self->location[0];
 155         *lon  = self->location[1];
 156         *elev = self->location[2];
 157 }
 158
 159 void gis_viewer_pan(GisViewer *self, gdouble lat, gdouble lon, gdouble elev)
 160 {
 161         g_assert(GIS_IS_VIEWER(self));
 162         g_debug("GisViewer: pan - lat=%8.3f, lon=%8.3f, elev=%8.3f", lat, lon, elev);
 163         self->location[0] += lat;
 164         self->location[1] += lon;
 165         self->location[2] += elev;
 166         _gis_viewer_fix_location(self);
 167         _gis_viewer_emit_location_changed(self);
 168 }
 169
 170 void gis_viewer_zoom(GisViewer *self, gdouble scale)
 171 {
 172         g_assert(GIS_IS_VIEWER(self));
 173         g_debug("GisViewer: zoom");
 174         self->location[2] *= scale;
 175         _gis_viewer_emit_location_changed(self);
 176 }
 177
 178 void gis_viewer_set_rotation(GisViewer *self, gdouble x, gdouble y, gdouble z)
 179 {
 180         g_assert(GIS_IS_VIEWER(self));
 181         g_debug("GisViewer: set_rotation");
 182         self->rotation[0] = x;
 183         self->rotation[1] = y;
 184         self->rotation[2] = z;
 185         _gis_viewer_emit_rotation_changed(self);
 186 }
 187
 188 void gis_viewer_get_rotation(GisViewer *self, gdouble *x, gdouble *y, gdouble *z)
 189 {
 190         g_assert(GIS_IS_VIEWER(self));
 191         g_debug("GisViewer: get_rotation");
 192         *x = self->rotation[0];
 193         *y = self->rotation[1];
 194         *z = self->rotation[2];
 195 }
 196
 197 void gis_viewer_rotate(GisViewer *self, gdouble x, gdouble y, gdouble z)
 198 {
 199         g_assert(GIS_IS_VIEWER(self));
 200         g_debug("GisViewer: rotate - x=%.0f, y=%.0f, z=%.0f", x, y, z);
 201         self->rotation[0] += x;
 202         self->rotation[1] += y;
 203         self->rotation[2] += z;
 204         _gis_viewer_emit_rotation_changed(self);
 205 }
 206
 207 void gis_viewer_refresh(GisViewer *self)
 208 {
 209         g_debug("GisViewer: refresh");
 210         _gis_viewer_emit_refresh(self);
 211 }
 212
 213 void gis_viewer_set_offline(GisViewer *self, gboolean offline)
 214 {
 215         g_assert(GIS_IS_VIEWER(self));
 216         g_debug("GisViewer: set_offline - %d", offline);
 217         self->offline = offline;
 218         _gis_viewer_emit_offline(self);
 219 }
 220
 221 gboolean gis_viewer_get_offline(GisViewer *self)
 222 {
 223         g_assert(GIS_IS_VIEWER(self));
 224         g_debug("GisViewer: get_offline - %d", self->offline);
 225         return self->offline;
 226 }
 227
 228 /* To be implemented by subclasses */
 229 void gis_viewer_center_position(GisViewer *self,
 230                 gdouble lat, gdouble lon, gdouble elev)
 231 {
 232         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 233         if (!klass->center_position)
 234                 g_warning("GisViewer: center_position - Unimplemented");
 235         klass->center_position(self, lat, lon, elev);
 236 }
 237
 238 void gis_viewer_project(GisViewer *self,
 239                 gdouble lat, gdouble lon, gdouble elev,
 240                 gdouble *px, gdouble *py, gdouble *pz)
 241 {
 242         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 243         if (!klass->project)
 244                 g_warning("GisViewer: project - Unimplemented");
 245         klass->project(self, lat, lon, elev, px, py, pz);
 246 }
 247
 248 void gis_viewer_clear_height_func(GisViewer *self)
 249 {
 250         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 251         if (!klass->clear_height_func)
 252                 g_warning("GisViewer: clear_height_func - Unimplemented");
 253         klass->clear_height_func(self);
 254 }
 255
 256 void gis_viewer_set_height_func(GisViewer *self, GisTile *tile,
 257                 GisHeightFunc height_func, gpointer user_data,
 258                 gboolean update)
 259 {
 260         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 261         if (!klass->set_height_func)
 262                 g_warning("GisViewer: set_height_func - Unimplemented");
 263         klass->set_height_func(self, tile, height_func, user_data, update);
 264 }
 265
 266 void gis_viewer_render_tile(GisViewer *self, GisTile *tile)
 267 {
 268         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 269         if (!klass->render_tile)
 270                 g_warning("GisViewer: render_tile - Unimplemented");
 271         klass->render_tile(self, tile);
 272 }
 273
 274 void gis_viewer_render_tiles(GisViewer *self, GisTile *root)
 275 {
 276         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 277         if (!klass->render_tiles)
 278                 g_warning("GisViewer: render_tiles - Unimplemented");
 279         klass->render_tiles(self, root);
 280 }
 281
 282 void gis_viewer_begin(GisViewer *self)
 283 {
 284         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 285         if (!klass->begin)
 286                 g_warning("GisViewer: begin - Unimplemented");
 287         klass->begin(self);
 288 }
 289
 290 void gis_viewer_end(GisViewer *self)
 291 {
 292         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 293         if (!klass->end)
 294                 g_warning("GisViewer: end - Unimplemented");
 295         klass->end(self);
 296 }
 297
 298 gpointer gis_viewer_add(GisViewer *self, GisObject *object,
 299                 gint level, gboolean sort)
 300 {
 301         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 302         if (!klass->add)
 303                 g_warning("GisViewer: add - Unimplemented");
 304         return klass->add(self, object, level, sort);
 305 }
 306
 307 void gis_viewer_remove(GisViewer *self, gpointer ref)
 308 {
 309         GisViewerClass *klass = GIS_VIEWER_GET_CLASS(self);
 310         if (!klass->remove)
 311                 g_warning("GisViewer: remove - Unimplemented");
 312         klass->remove(self, ref);
 313 }
 314
 315 /****************
 316  * GObject code *
 317  ****************/
 318 G_DEFINE_ABSTRACT_TYPE(GisViewer, gis_viewer, GTK_TYPE_DRAWING_AREA);
 319 static void gis_viewer_init(GisViewer *self)
 320 {
 321         g_debug("GisViewer: init");
 322         /* Default values */
 323         self->time = g_strdup("");
 324         self->location[0] = 40;
 325         self->location[1] = -100;
 326         self->location[2] = 1.5*EARTH_R;
 327         self->rotation[0] = 0;
 328         self->rotation[1] = 0;
 329         self->rotation[2] = 0;
 330
 331         g_signal_connect(self, "key-press-event",    G_CALLBACK(on_key_press),    NULL);
 332         g_signal_connect(self, "button-press-event", G_CALLBACK(on_button_press), NULL);
 333
 334         g_signal_connect(self, "location-changed",   G_CALLBACK(on_view_changed), NULL);
 335         g_signal_connect(self, "rotation-changed",   G_CALLBACK(on_view_changed), NULL);
 336 }
 337 static void gis_viewer_finalize(GObject *gobject)
 338 {
 339         g_debug("GisViewer: finalize");
 340         GisViewer *self = GIS_VIEWER(gobject);
 341         g_free(self->time);
 342         G_OBJECT_CLASS(gis_viewer_parent_class)->finalize(gobject);
 343 }
 344 static void gis_viewer_class_init(GisViewerClass *klass)
 345 {
 346         g_debug("GisViewer: class_init");
 347         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 348         gobject_class->finalize     = gis_viewer_finalize;
 349         signals[SIG_TIME_CHANGED] = g_signal_new(
 350                         "time-changed",
 351                         G_TYPE_FROM_CLASS(gobject_class),
 352                         G_SIGNAL_RUN_LAST,
 353                         0,
 354                         NULL,
 355                         NULL,
 356                         g_cclosure_marshal_VOID__STRING,
 357                         G_TYPE_NONE,
 358                         1,
 359                         G_TYPE_STRING);
 360         signals[SIG_LOCATION_CHANGED] = g_signal_new(
 361                         "location-changed",
 362                         G_TYPE_FROM_CLASS(gobject_class),
 363                         G_SIGNAL_RUN_LAST,
 364                         0,
 365                         NULL,
 366                         NULL,
 367                         gis_cclosure_marshal_VOID__DOUBLE_DOUBLE_DOUBLE,
 368                         G_TYPE_NONE,
 369                         3,
 370                         G_TYPE_DOUBLE,
 371                         G_TYPE_DOUBLE,
 372                         G_TYPE_DOUBLE);
 373         signals[SIG_ROTATION_CHANGED] = g_signal_new(
 374                         "rotation-changed",
 375                         G_TYPE_FROM_CLASS(gobject_class),
 376                         G_SIGNAL_RUN_LAST,
 377                         0,
 378                         NULL,
 379                         NULL,
 380                         gis_cclosure_marshal_VOID__DOUBLE_DOUBLE_DOUBLE,
 381                         G_TYPE_NONE,
 382                         3,
 383                         G_TYPE_DOUBLE,
 384                         G_TYPE_DOUBLE,
 385                         G_TYPE_DOUBLE);
 386         signals[SIG_REFRESH] = g_signal_new(
 387                         "refresh",
 388                         G_TYPE_FROM_CLASS(gobject_class),
 389                         G_SIGNAL_RUN_LAST,
 390                         0,
 391                         NULL,
 392                         NULL,
 393                         g_cclosure_marshal_VOID__VOID,
 394                         G_TYPE_NONE,
 395                         0);
 396         signals[SIG_OFFLINE] = g_signal_new(
 397                         "offline",
 398                         G_TYPE_FROM_CLASS(gobject_class),
 399                         G_SIGNAL_RUN_LAST,
 400                         0,
 401                         NULL,
 402                         NULL,
 403                         g_cclosure_marshal_VOID__BOOLEAN,
 404                         G_TYPE_NONE,
 405                         1,
 406                         G_TYPE_BOOLEAN);
 407 }