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