Pileus Git - grits/blob - src/aweather-gui.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 <gtk/gtkgl.h>
  21 #include <gdk/gdkkeysyms.h>
  22 #include <GL/gl.h>
  23 #include <GL/glu.h>
  24 #include <math.h>
  25
  26 #include "aweather-gui.h"
  27 #include "aweather-view.h"
  28 #include "aweather-plugin.h"
  29 #include "location.h"
  30
  31 /****************
  32  * GObject code *
  33  ****************/
  34 G_DEFINE_TYPE(AWeatherGui, aweather_gui, GTK_TYPE_WINDOW);
  35 static void aweather_gui_init(AWeatherGui *gui)
  36 {
  37         gui->plugins = NULL;
  38         g_debug("AWeatherGui: init");
  39 }
  40 static GObject *aweather_gui_constructor(GType gtype, guint n_properties,
  41                 GObjectConstructParam *properties)
  42 {
  43         g_debug("aweather_gui: constructor");
  44         GObjectClass *parent_class = G_OBJECT_CLASS(aweather_gui_parent_class);
  45         return  parent_class->constructor(gtype, n_properties, properties);
  46 }
  47 static void aweather_gui_dispose(GObject *gobject)
  48 {
  49         g_debug("AWeatherGui: dispose");
  50         AWeatherGui *gui = AWEATHER_GUI(gobject);
  51         if (gui->view) {
  52                 g_object_unref(gui->view);
  53                 gui->view = NULL;
  54         }
  55         if (gui->builder) {
  56                 /* Reparent to avoid double unrefs */
  57                 GtkWidget *body   = aweather_gui_get_widget(gui, "body");
  58                 GtkWidget *window = aweather_gui_get_widget(gui, "window");
  59                 gtk_widget_reparent(body, window);
  60                 g_object_unref(gui->builder);
  61                 gui->builder = NULL;
  62         }
  63         if (gui->plugins) {
  64                 g_list_foreach(gui->plugins, (GFunc)g_object_unref, NULL);
  65                 g_list_free(gui->plugins);
  66                 gui->plugins = NULL;
  67         }
  68         //for (GList *cur = gui->plugins; cur; cur = cur->next)
  69         //      g_object_unref(cur->data);
  70         G_OBJECT_CLASS(aweather_gui_parent_class)->dispose(gobject);
  71 }
  72 static void aweather_gui_finalize(GObject *gobject)
  73 {
  74         g_debug("AWeatherGui: finalize");
  75         G_OBJECT_CLASS(aweather_gui_parent_class)->finalize(gobject);
  76         gtk_main_quit();
  77
  78 }
  79 static void aweather_gui_class_init(AWeatherGuiClass *klass)
  80 {
  81         g_debug("AWeatherGui: class_init");
  82         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
  83         gobject_class->constructor  = aweather_gui_constructor;
  84         gobject_class->dispose      = aweather_gui_dispose;
  85         gobject_class->finalize     = aweather_gui_finalize;
  86 }
  87
  88 /*************
  89  * Callbacks *
  90  *************/
  91 gboolean on_drawing_button_press(GtkWidget *widget, GdkEventButton *event, AWeatherGui *gui)
  92 {
  93         g_debug("AWeatherGui: on_drawing_button_press - Grabbing focus");
  94         GtkWidget *drawing = aweather_gui_get_widget(gui, "drawing");
  95         gtk_widget_grab_focus(drawing);
  96         return TRUE;
  97 }
  98 gboolean on_drawing_key_press(GtkWidget *widget, GdkEventKey *event, AWeatherGui *gui)
  99 {
 100         g_debug("AWeatherGui: on_drawing_key_press - key=%x, state=%x",
 101                         event->keyval, event->state);
 102         AWeatherView *view = aweather_gui_get_view(gui);
 103         double x,y,z;
 104         aweather_view_get_location(view, &x, &y, &z);
 105         guint kv = event->keyval;
 106         if      (kv == GDK_Right || kv == GDK_l) aweather_view_pan(view,  z/10, 0, 0);
 107         else if (kv == GDK_Left  || kv == GDK_h) aweather_view_pan(view, -z/10, 0, 0);
 108         else if (kv == GDK_Up    || kv == GDK_k) aweather_view_pan(view, 0,  z/10, 0);
 109         else if (kv == GDK_Down  || kv == GDK_j) aweather_view_pan(view, 0, -z/10, 0);
 110         else if (kv == GDK_minus || kv == GDK_o) aweather_view_zoom(view, 10./9);
 111         else if (kv == GDK_plus  || kv == GDK_i) aweather_view_zoom(view, 9./10);
 112         return TRUE;
 113 }
 114
 115 gboolean on_gui_key_press(GtkWidget *widget, GdkEventKey *event, AWeatherGui *gui)
 116 {
 117         g_debug("AWeatherGui: on_gui_key_press - key=%x, state=%x",
 118                         event->keyval, event->state);
 119         AWeatherView *view = aweather_gui_get_view(gui);
 120         if (event->keyval == GDK_q)
 121                 gtk_widget_destroy(GTK_WIDGET(gui));
 122         else if (event->keyval == GDK_r && event->state & GDK_CONTROL_MASK)
 123                 aweather_view_refresh(view);
 124         else if (event->keyval == GDK_Tab || event->keyval == GDK_ISO_Left_Tab) {
 125                 GtkNotebook *tabs = GTK_NOTEBOOK(aweather_gui_get_widget(gui, "tabs"));
 126                 gint num_tabs = gtk_notebook_get_n_pages(tabs);
 127                 gint cur_tab  = gtk_notebook_get_current_page(tabs);
 128                 if (event->state & GDK_SHIFT_MASK)
 129                         gtk_notebook_set_current_page(tabs, (cur_tab-1)%num_tabs);
 130                 else
 131                         gtk_notebook_set_current_page(tabs, (cur_tab+1)%num_tabs);
 132         };
 133         return FALSE;
 134 }
 135
 136 void on_quit(GtkMenuItem *menu, AWeatherGui *gui)
 137 {
 138         gtk_widget_destroy(GTK_WIDGET(gui));
 139 }
 140
 141 void on_offline(GtkToggleAction *action, AWeatherGui *gui)
 142 {
 143         AWeatherView *view = aweather_gui_get_view(gui);
 144         aweather_view_set_offline(view,
 145                 gtk_toggle_action_get_active(action));
 146 }
 147
 148 void on_zoomin(GtkAction *action, AWeatherGui *gui)
 149 {
 150         AWeatherView *view = aweather_gui_get_view(gui);
 151         aweather_view_zoom(view, 3./4);
 152 }
 153
 154 void on_zoomout(GtkAction *action, AWeatherGui *gui)
 155 {
 156         AWeatherView *view = aweather_gui_get_view(gui);
 157         aweather_view_zoom(view, 4./3);
 158 }
 159
 160 void on_refresh(GtkAction *action, AWeatherGui *gui)
 161 {
 162         AWeatherView *view = aweather_gui_get_view(gui);
 163         aweather_view_refresh(view);
 164 }
 165
 166 void on_about(GtkAction *action, AWeatherGui *gui)
 167 {
 168         // TODO: use gtk_widget_hide_on_delete()
 169         GError *error = NULL;
 170         GtkBuilder *builder = gtk_builder_new();
 171         if (!gtk_builder_add_from_file(builder, DATADIR "/aweather/about.ui", &error))
 172                 g_error("Failed to create gtk builder: %s", error->message);
 173         gtk_builder_connect_signals(builder, NULL);
 174         GtkWidget *window = GTK_WIDGET(gtk_builder_get_object(builder, "window"));
 175         gtk_window_set_transient_for(GTK_WINDOW(window),
 176                         GTK_WINDOW(aweather_gui_get_widget(gui, "window")));
 177         gtk_widget_show_all(window);
 178         g_object_unref(builder);
 179 }
 180
 181 void on_time_changed(GtkTreeView *view, GtkTreePath *path,
 182                 GtkTreeViewColumn *column, AWeatherGui *gui)
 183 {
 184         gchar *time;
 185         GtkTreeIter iter;
 186         GtkTreeModel *model = gtk_tree_view_get_model(view);
 187         gtk_tree_model_get_iter(model, &iter, path);
 188         gtk_tree_model_get(model, &iter, 0, &time, -1);
 189         AWeatherView *aview = aweather_gui_get_view(gui);
 190         aweather_view_set_time(aview, time);
 191         g_free(time);
 192 }
 193
 194 void on_site_changed(GtkComboBox *combo, AWeatherGui *gui)
 195 {
 196         gchar *site;
 197         GtkTreeIter iter;
 198         GtkTreeModel *model = gtk_combo_box_get_model(combo);
 199         gtk_combo_box_get_active_iter(combo, &iter);
 200         gtk_tree_model_get(model, &iter, 1, &site, -1);
 201         AWeatherView *view = aweather_gui_get_view(gui);
 202         aweather_view_set_site(view, site);
 203         g_free(site);
 204 }
 205
 206 gboolean on_map(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
 207 {
 208         g_debug("AWeatherGui: on_map");
 209         AWeatherView *view = aweather_gui_get_view(gui);
 210
 211         /* Misc */
 212         glEnable(GL_BLEND);
 213         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 214         glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
 215
 216         /* Tessellation, "finding intersecting triangles" */
 217         /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
 218         /* http://www.opengl.org/wiki/Alpha_Blending */
 219         glAlphaFunc(GL_GREATER,0.1);
 220         glEnable(GL_ALPHA_TEST);
 221
 222         /* Depth test */
 223         glClearDepth(1.0);
 224         glDepthFunc(GL_LEQUAL);
 225         glEnable(GL_DEPTH_TEST);
 226
 227         aweather_gui_gl_end(gui);
 228         return FALSE;
 229 }
 230
 231 gboolean on_configure(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
 232 {
 233         g_debug("AWeatherGui: on_confiure");
 234         aweather_gui_gl_begin(gui);
 235
 236         double x, y, z;
 237         AWeatherView *view = aweather_gui_get_view(gui);
 238         aweather_view_get_location(view, &x, &y, &z);
 239
 240         /* Window is at 500 m from camera */
 241         double width  = da->allocation.width;
 242         double height = da->allocation.height;
 243
 244         glViewport(0, 0, width, height);
 245
 246         /* Perspective */
 247         glMatrixMode(GL_PROJECTION);
 248         glLoadIdentity();
 249         double rad  = atan((height/2)/500);
 250         double deg  = (rad*180)/M_PI;
 251
 252         gluPerspective(deg*2, width/height, -z-20, -z+20);
 253         //gluPerspective(deg*2, width/height, 1, 500*1000);
 254
 255         aweather_gui_gl_end(gui);
 256         return FALSE;
 257 }
 258
 259 gboolean on_expose(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 260 {
 261         g_debug("AWeatherGui: on_expose - begin");
 262         aweather_gui_gl_begin(gui);
 263
 264         double x, y, z;
 265         AWeatherView *view = aweather_gui_get_view(gui);
 266         aweather_view_get_location(view, &x, &y, &z);
 267
 268         glMatrixMode(GL_MODELVIEW);
 269         glLoadIdentity();
 270         glTranslatef(x, y, z);
 271
 272         //glRotatef(-45, 1, 0, 0);
 273
 274         /* Expose plugins */
 275         for (GList *cur = gui->plugins; cur; cur = cur->next) {
 276                 AWeatherPlugin *plugin = AWEATHER_PLUGIN(cur->data);
 277                 aweather_plugin_expose(plugin);
 278         }
 279
 280         aweather_gui_gl_end(gui);
 281         aweather_gui_gl_flush(gui);
 282         g_debug("AWeatherGui: on_expose - end\n");
 283         return FALSE;
 284 }
 285
 286 void on_location_changed(AWeatherView *view,
 287                 gdouble x, gdouble y, gdouble z, AWeatherGui *gui)
 288 {
 289         /* Reset clipping area and redraw */
 290         GtkWidget *da = aweather_gui_get_widget(gui, "drawing");
 291         on_configure(da, NULL, gui);
 292         aweather_gui_gl_redraw(gui);
 293 }
 294
 295 /* TODO: replace the code in these with `gtk_tree_model_find' utility */
 296 static void update_time_widget(AWeatherView *view, const char *time, AWeatherGui *gui)
 297 {
 298         g_debug("AWeatherGui: update_time_widget - time=%s", time);
 299         GtkTreeView  *tview = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 300         GtkTreeModel *model = GTK_TREE_MODEL(gtk_tree_view_get_model(tview));
 301         for (int i = 0; i < gtk_tree_model_iter_n_children(model, NULL); i++) {
 302                 char *text;
 303                 GtkTreeIter iter;
 304                 gtk_tree_model_iter_nth_child(model, &iter, NULL, i);
 305                 gtk_tree_model_get(model, &iter, 0, &text, -1);
 306                 if (g_str_equal(text, time)) {
 307                         GtkTreePath *path = gtk_tree_model_get_path(model, &iter);
 308                         g_signal_handlers_block_by_func(tview,
 309                                         G_CALLBACK(on_site_changed), gui);
 310                         gtk_tree_view_set_cursor(tview, path, NULL, FALSE);
 311                         g_signal_handlers_unblock_by_func(tview,
 312                                         G_CALLBACK(on_site_changed), gui);
 313                         gtk_tree_path_free(path);
 314                         g_free(text);
 315                         return;
 316                 }
 317                 g_free(text);
 318         }
 319 }
 320 static void update_site_widget(AWeatherView *view, char *site, AWeatherGui *gui)
 321 {
 322         g_debug("AWeatherGui: updat_site_widget - site=%s", site);
 323         GtkComboBox  *combo = GTK_COMBO_BOX(aweather_gui_get_widget(gui, "site"));
 324         GtkTreeModel *model = GTK_TREE_MODEL(gtk_combo_box_get_model(combo));
 325         for (int i = 0; i < gtk_tree_model_iter_n_children(model, NULL); i++) {
 326                 GtkTreeIter iter1;
 327                 gtk_tree_model_iter_nth_child(model, &iter1, NULL, i);
 328                 for (int i = 0; i < gtk_tree_model_iter_n_children(model, &iter1); i++) {
 329                         GtkTreeIter iter2;
 330                         gtk_tree_model_iter_nth_child(model, &iter2, &iter1, i);
 331                         char *text;
 332                         gtk_tree_model_get(model, &iter2, 1, &text, -1);
 333                         if (text == NULL)
 334                                 continue;
 335                         if (g_str_equal(text, site)) {
 336                                 g_signal_handlers_block_by_func(combo,
 337                                                 G_CALLBACK(on_site_changed), gui);
 338                                 gtk_combo_box_set_active_iter(combo, &iter2);
 339                                 g_signal_handlers_unblock_by_func(combo,
 340                                                 G_CALLBACK(on_site_changed), gui);
 341                                 g_free(text);
 342                                 return;
 343                         }
 344                         g_free(text);
 345                 }
 346         }
 347 }
 348
 349 /*****************
 350  * Setup helpers *
 351  *****************/
 352 static void combo_sensitive(GtkCellLayout *cell_layout, GtkCellRenderer *cell,
 353                 GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data)
 354 {
 355         gboolean sensitive = !gtk_tree_model_iter_has_child(tree_model, iter);
 356         g_object_set(cell, "sensitive", sensitive, NULL);
 357 }
 358
 359 static void site_setup(AWeatherGui *gui)
 360 {
 361         GtkTreeIter state, city;
 362         GtkTreeStore *store = GTK_TREE_STORE(aweather_gui_get_object(gui, "sites"));
 363         for (int i = 0; cities[i].label; i++) {
 364                 if (cities[i].type == LOCATION_STATE) {
 365                         gtk_tree_store_append(store, &state, NULL);
 366                         gtk_tree_store_set   (store, &state, 0, cities[i].label,
 367                                                              1, cities[i].code,  -1);
 368                 } else {
 369                         gtk_tree_store_append(store, &city, &state);
 370                         gtk_tree_store_set   (store, &city, 0, cities[i].label,
 371                                                             1, cities[i].code,  -1);
 372                 }
 373         }
 374
 375         GtkWidget *combo    = aweather_gui_get_widget(gui, "site");
 376         GObject   *renderer = aweather_gui_get_object(gui, "site_rend");
 377         gtk_cell_layout_set_cell_data_func(GTK_CELL_LAYOUT(combo),
 378                         GTK_CELL_RENDERER(renderer), combo_sensitive, NULL, NULL);
 379
 380         AWeatherView *aview = aweather_gui_get_view(gui);
 381         g_signal_connect(aview, "site-changed", G_CALLBACK(update_site_widget), gui);
 382 }
 383
 384 static void time_setup(AWeatherGui *gui)
 385 {
 386         GtkTreeView       *tview = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 387         GtkCellRenderer   *rend  = gtk_cell_renderer_text_new();
 388         GtkTreeViewColumn *col   = gtk_tree_view_column_new_with_attributes(
 389                                         "Time", rend, "text", 0, NULL);
 390
 391         gtk_tree_view_append_column(tview, col);
 392         g_object_set(rend, "size-points", 8.0, NULL);
 393
 394         AWeatherView *aview = aweather_gui_get_view(gui);
 395         g_signal_connect(aview, "time-changed", G_CALLBACK(update_time_widget), gui);
 396 }
 397
 398 static void opengl_setup(AWeatherGui *gui)
 399 {
 400         GtkDrawingArea *drawing = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 401
 402         GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
 403                         GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
 404                         GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
 405         if (!glconfig)
 406                 g_error("Failed to create glconfig");
 407         if (!gtk_widget_set_gl_capability(GTK_WIDGET(drawing),
 408                                 glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
 409                 g_error("GL lacks required capabilities");
 410
 411         /* Set up OpenGL Stuff, glade doesn't like doing these */
 412         g_signal_connect(drawing, "map-event",       G_CALLBACK(on_map),       gui);
 413         g_signal_connect(drawing, "configure-event", G_CALLBACK(on_configure), gui);
 414         g_signal_connect(drawing, "expose-event",    G_CALLBACK(on_expose),    gui);
 415 }
 416
 417
 418
 419 /***********
 420  * Methods *
 421  ***********/
 422 AWeatherGui *aweather_gui_new()
 423 {
 424         g_debug("AWeatherGui: new");
 425         GError *error = NULL;
 426
 427         AWeatherGui *self = g_object_new(AWEATHER_TYPE_GUI, NULL);
 428         self->view    = aweather_view_new();
 429         self->builder = gtk_builder_new();
 430
 431         if (!gtk_builder_add_from_file(self->builder, DATADIR "/aweather/main.ui", &error))
 432                 g_error("Failed to create gtk builder: %s", error->message);
 433         gtk_builder_connect_signals(self->builder, self);
 434         g_signal_connect(self, "key-press-event", G_CALLBACK(on_gui_key_press), self);
 435         gtk_widget_reparent(aweather_gui_get_widget(self, "body"), GTK_WIDGET(self));
 436
 437         /* Load components */
 438         aweather_view_set_location(self->view, 0, 0, -300*1000);
 439         g_signal_connect(self->view, "location-changed", G_CALLBACK(on_location_changed), self);
 440         site_setup(self);
 441         time_setup(self);
 442         opengl_setup(self);
 443         return self;
 444 }
 445 AWeatherView *aweather_gui_get_view(AWeatherGui *gui)
 446 {
 447         g_assert(AWEATHER_IS_GUI(gui));
 448         return gui->view;
 449 }
 450 GtkBuilder *aweather_gui_get_builder(AWeatherGui *gui)
 451 {
 452         g_debug("AWeatherGui: get_builder");
 453         g_assert(AWEATHER_IS_GUI(gui));
 454         return gui->builder;
 455 }
 456 GtkWidget *aweather_gui_get_widget(AWeatherGui *gui, const gchar *name)
 457 {
 458         g_debug("AWeatherGui: get_widget - name=%s", name);
 459         g_assert(AWEATHER_IS_GUI(gui));
 460         GObject *widget = gtk_builder_get_object(gui->builder, name);
 461         if (!GTK_IS_WIDGET(widget))
 462                 g_error("Failed to get widget `%s'", name);
 463         return GTK_WIDGET(widget);
 464 }
 465 GObject *aweather_gui_get_object(AWeatherGui *gui, const gchar *name)
 466 {
 467         g_debug("AWeatherGui: get_widget - name=%s", name);
 468         g_assert(AWEATHER_IS_GUI(gui));
 469         return gtk_builder_get_object(gui->builder, name);
 470 }
 471 void aweather_gui_register_plugin(AWeatherGui *gui, AWeatherPlugin *plugin)
 472 {
 473         g_debug("AWeatherGui: register_plugin");
 474         gui->plugins = g_list_append(gui->plugins, plugin);
 475 }
 476 void aweather_gui_gl_redraw(AWeatherGui *gui)
 477 {
 478         g_debug("AWeatherGui: gl_redraw");
 479         GtkWidget *drawing = aweather_gui_get_widget(gui, "drawing");
 480         gtk_widget_queue_draw(drawing);
 481 }
 482 void aweather_gui_gl_begin(AWeatherGui *gui)
 483 {
 484         g_assert(AWEATHER_IS_GUI(gui));
 485
 486         GtkDrawingArea *drawing    = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 487         GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(drawing));
 488         GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(drawing));
 489
 490         if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
 491                 g_assert_not_reached();
 492
 493         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 494 }
 495 void aweather_gui_gl_end(AWeatherGui *gui)
 496 {
 497         g_assert(AWEATHER_IS_GUI(gui));
 498         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 499         gdk_gl_drawable_gl_end(gldrawable);
 500 }
 501 void aweather_gui_gl_flush(AWeatherGui *gui)
 502 {
 503         g_assert(AWEATHER_IS_GUI(gui));
 504         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 505         if (gdk_gl_drawable_is_double_buffered(gldrawable))
 506                 gdk_gl_drawable_swap_buffers(gldrawable);
 507         else
 508                 glFlush();
 509         gdk_gl_drawable_gl_end(gldrawable);
 510 }