Pileus Git - aweather/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 "location.h"
  29
  30 /*************
  31  * callbacks *
  32  *************/
  33 gboolean on_key_press(GtkWidget *widget, GdkEventKey *event, AWeatherGui *gui)
  34 {
  35         g_message("key_press: key=%x, state=%x", event->keyval, event->state);
  36         AWeatherView *view = aweather_gui_get_view(gui);
  37         if (event->keyval == GDK_q)
  38                 gtk_main_quit();
  39         else if (event->keyval == GDK_r && event->state & GDK_CONTROL_MASK)
  40                 aweather_view_refresh(view);
  41         else if (event->keyval == GDK_plus)
  42                 aweather_view_zoomin(view);
  43         else if (event->keyval == GDK_minus)
  44                 aweather_view_zoomout(view);
  45         else if (event->keyval == GDK_Tab || event->keyval == GDK_ISO_Left_Tab) {
  46                 GtkNotebook *tabs = GTK_NOTEBOOK(aweather_gui_get_widget(gui, "tabs"));
  47                 gint num_tabs = gtk_notebook_get_n_pages(tabs);
  48                 gint cur_tab  = gtk_notebook_get_current_page(tabs);
  49                 if (event->state & GDK_SHIFT_MASK)
  50                         gtk_notebook_set_current_page(tabs, (cur_tab-1)%num_tabs);
  51                 else
  52                         gtk_notebook_set_current_page(tabs, (cur_tab+1)%num_tabs);
  53         }
  54         return TRUE;
  55 }
  56
  57 void on_refresh(GtkToolButton *button, AWeatherGui *gui)
  58 {
  59         AWeatherView *view = aweather_gui_get_view(gui);
  60         aweather_view_refresh(view);
  61 }
  62
  63 void on_zoomin(GtkToolButton *button, AWeatherGui *gui)
  64 {
  65         AWeatherView *view = aweather_gui_get_view(gui);
  66         aweather_view_zoomin(view);
  67 }
  68
  69 void on_zoomout(GtkToolButton *button, AWeatherGui *gui)
  70 {
  71         AWeatherView *view = aweather_gui_get_view(gui);
  72         aweather_view_zoomout(view);
  73 }
  74
  75 void on_site_changed(GtkComboBox *combo, AWeatherGui *gui)
  76 {
  77         gchar *site;
  78         GtkTreeIter iter;
  79         GtkTreeModel *model = gtk_combo_box_get_model(combo);
  80         gtk_combo_box_get_active_iter(combo, &iter);
  81         gtk_tree_model_get(model, &iter, 1, &site, -1);
  82         AWeatherView *view = aweather_gui_get_view(gui);
  83         aweather_view_set_location(view, site);
  84         g_free(site);
  85 }
  86
  87 void on_time_changed(GtkTreeView *view, GtkTreePath *path,
  88                 GtkTreeViewColumn *column, AWeatherGui *gui)
  89 {
  90         gchar *time;
  91         GtkTreeIter iter;
  92         GtkTreeModel *model = gtk_tree_view_get_model(view);
  93         gtk_tree_model_get_iter(model, &iter, path);
  94         gtk_tree_model_get(model, &iter, 0, &time, -1);
  95         AWeatherView *aview = aweather_gui_get_view(gui);
  96         aweather_view_set_time(aview, time);
  97         g_free(time);
  98 }
  99
 100 gboolean on_map(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
 101 {
 102         g_message("on_map");
 103         AWeatherView *view = aweather_gui_get_view(gui);
 104         aweather_view_set_location(view, "IND");
 105
 106         /* Misc */
 107         glEnable(GL_BLEND);
 108         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 109         glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
 110
 111         /* Tessellation, "finding intersecting triangles" */
 112         /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
 113         /* http://www.opengl.org/wiki/Alpha_Blending */
 114         glAlphaFunc(GL_GREATER,0.1);
 115         glEnable(GL_ALPHA_TEST);
 116
 117         /* Depth test */
 118         glClearDepth(1.0);
 119         glDepthFunc(GL_LEQUAL);
 120         glEnable(GL_DEPTH_TEST);
 121
 122         aweather_gui_gl_end(gui);
 123         return FALSE;
 124 }
 125
 126 gboolean on_configure(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
 127 {
 128         //g_message("on_confiure");
 129         aweather_gui_gl_begin(gui);
 130
 131         double width  = da->allocation.width;
 132         double height = da->allocation.height;
 133         double dist   = 500*1000; // 500 km
 134         double cam    = 300*1000; // 500 km
 135
 136         glViewport(0, 0, width, height);
 137
 138         /* Perspective */
 139         glMatrixMode(GL_PROJECTION);
 140         glLoadIdentity();
 141         double rad = atan(height/2*1000.0/dist); // 1px = 1000 meters
 142         double deg = (rad*180)/M_PI;
 143         gluPerspective(deg*2, width/height, cam-20, cam+20);
 144
 145         /* Camera position? */
 146         glMatrixMode(GL_MODELVIEW);
 147         glLoadIdentity();
 148         glTranslatef(0.0, 0.0, -cam);
 149         //glRotatef(-45, 1, 0, 0);
 150
 151         aweather_gui_gl_end(gui);
 152         return FALSE;
 153 }
 154
 155 gboolean on_expose_begin(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 156 {
 157         g_message("aweather:espose_begin");
 158         aweather_gui_gl_begin(gui);
 159         return FALSE;
 160 }
 161 gboolean on_expose_end(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 162 {
 163         g_message("aweather:espose_end\n");
 164         aweather_gui_gl_end(gui);
 165         aweather_gui_gl_flush(gui);
 166         return FALSE;
 167 }
 168
 169 /* TODO: replace the code in these with `gtk_tree_model_find' utility */
 170 static void update_time_widget(AWeatherView *view, char *time, AWeatherGui *gui)
 171 {
 172         g_message("updating time widget");
 173         GtkTreeView  *tview = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 174         GtkTreeModel *model = GTK_TREE_MODEL(gtk_tree_view_get_model(tview));
 175         for (int i = 0; i < gtk_tree_model_iter_n_children(model, NULL); i++) {
 176                 char *text;
 177                 GtkTreeIter iter;
 178                 gtk_tree_model_iter_nth_child(model, &iter, NULL, i);
 179                 gtk_tree_model_get(model, &iter, 0, &text, -1);
 180                 if (g_str_equal(text, time)) {
 181                         GtkTreePath *path = gtk_tree_model_get_path(model, &iter);
 182                         g_signal_handlers_block_by_func(tview,
 183                                         G_CALLBACK(on_site_changed), gui);
 184                         gtk_tree_view_set_cursor(tview, path, NULL, FALSE);
 185                         g_signal_handlers_unblock_by_func(tview,
 186                                         G_CALLBACK(on_site_changed), gui);
 187                         gtk_tree_path_free(path);
 188                         g_free(text);
 189                         return;
 190                 }
 191                 g_free(text);
 192         }
 193 }
 194 static void update_location_widget(AWeatherView *view, char *location, AWeatherGui *gui)
 195 {
 196         g_message("updating location widget to %s", location);
 197         GtkComboBox  *combo = GTK_COMBO_BOX(aweather_gui_get_widget(gui, "site"));
 198         GtkTreeModel *model = GTK_TREE_MODEL(gtk_combo_box_get_model(combo));
 199         for (int i = 0; i < gtk_tree_model_iter_n_children(model, NULL); i++) {
 200                 GtkTreeIter iter1;
 201                 gtk_tree_model_iter_nth_child(model, &iter1, NULL, i);
 202                 for (int i = 0; i < gtk_tree_model_iter_n_children(model, &iter1); i++) {
 203                         GtkTreeIter iter2;
 204                         gtk_tree_model_iter_nth_child(model, &iter2, &iter1, i);
 205                         char *text;
 206                         gtk_tree_model_get(model, &iter2, 1, &text, -1);
 207                         if (g_str_equal(text, location)) {
 208                                 g_signal_handlers_block_by_func(combo,
 209                                                 G_CALLBACK(on_site_changed), gui);
 210                                 gtk_combo_box_set_active_iter(combo, &iter2);
 211                                 g_signal_handlers_unblock_by_func(combo,
 212                                                 G_CALLBACK(on_site_changed), gui);
 213                                 g_free(text);
 214                                 return;
 215                         }
 216                         g_free(text);
 217                 }
 218         }
 219 }
 220
 221 /*****************
 222  * Setup helpers *
 223  *****************/
 224 static void combo_sensitive(GtkCellLayout *cell_layout, GtkCellRenderer *cell,
 225                 GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data)
 226 {
 227         gboolean sensitive = !gtk_tree_model_iter_has_child(tree_model, iter);
 228         g_object_set(cell, "sensitive", sensitive, NULL);
 229 }
 230
 231 static void site_setup(AWeatherGui *gui)
 232 {
 233         GtkTreeIter state, city;
 234         GtkTreeStore *store = gtk_tree_store_new(2, G_TYPE_STRING, G_TYPE_STRING);
 235         for (int i = 0; cities[i].label; i++) {
 236                 if (cities[i].type == LOCATION_STATE) {
 237                         gtk_tree_store_append(store, &state, NULL);
 238                         gtk_tree_store_set   (store, &state, 0, cities[i].label,
 239                                                              1, cities[i].code,  -1);
 240                 } else {
 241                         gtk_tree_store_append(store, &city, &state);
 242                         gtk_tree_store_set   (store, &city, 0, cities[i].label,
 243                                                             1, cities[i].code,  -1);
 244                 }
 245         }
 246
 247         GtkWidget       *combo    = aweather_gui_get_widget(gui, "site");
 248         GtkCellRenderer *renderer = gtk_cell_renderer_text_new();
 249         gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), renderer, FALSE);
 250         gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo), renderer, "text", 0, NULL);
 251         gtk_combo_box_set_model(GTK_COMBO_BOX(combo), GTK_TREE_MODEL(store));
 252         gtk_cell_layout_set_cell_data_func(GTK_CELL_LAYOUT(combo), renderer,
 253                         combo_sensitive, NULL, NULL);
 254         g_object_unref(renderer);
 255         g_object_unref(store);
 256
 257         AWeatherView *aview = aweather_gui_get_view(gui);
 258         g_signal_connect(aview, "location-changed", G_CALLBACK(update_location_widget), gui);
 259 }
 260
 261 static void time_setup(AWeatherGui *gui)
 262 {
 263         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 264         GtkTreeModel *store  = GTK_TREE_MODEL(gtk_list_store_new(1, G_TYPE_STRING));
 265         gtk_tree_view_set_model(tview, store);
 266
 267         GtkCellRenderer   *rend = gtk_cell_renderer_text_new();
 268         GtkTreeViewColumn *col  = gtk_tree_view_column_new_with_attributes(
 269                                         "Time", rend, "text", 0, NULL);
 270         gtk_tree_view_append_column(tview, col);
 271
 272         AWeatherView *aview = aweather_gui_get_view(gui);
 273         g_signal_connect(aview, "time-changed", G_CALLBACK(update_time_widget), gui);
 274 }
 275
 276 static void opengl_setup(AWeatherGui *gui)
 277 {
 278         GtkDrawingArea *drawing = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 279
 280         GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
 281                         GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
 282                         GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
 283         if (!glconfig)
 284                 g_error("Failed to create glconfig");
 285         if (!gtk_widget_set_gl_capability(GTK_WIDGET(drawing),
 286                                 glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
 287                 g_error("GL lacks required capabilities");
 288
 289         /* Set up OpenGL Stuff */
 290         g_signal_connect      (drawing, "map-event",       G_CALLBACK(on_map),          gui);
 291         g_signal_connect      (drawing, "configure-event", G_CALLBACK(on_configure),    gui);
 292         g_signal_connect      (drawing, "expose-event",    G_CALLBACK(on_expose_begin), gui);
 293         g_signal_connect_after(drawing, "expose-event",    G_CALLBACK(on_expose_end),   gui);
 294 }
 295
 296
 297 /****************
 298  * GObject code *
 299  ****************/
 300 G_DEFINE_TYPE(AWeatherGui, aweather_gui, G_TYPE_OBJECT);
 301
 302 /* Constructor / destructors */
 303 static void aweather_gui_init(AWeatherGui *gui)
 304 {
 305         //g_message("aweather_gui_init");
 306 }
 307
 308 static GObject *aweather_gui_constructor(GType gtype, guint n_properties,
 309                 GObjectConstructParam *properties)
 310 {
 311         //g_message("aweather_gui_constructor");
 312         GObjectClass *parent_class = G_OBJECT_CLASS(aweather_gui_parent_class);
 313         return  parent_class->constructor(gtype, n_properties, properties);
 314 }
 315
 316 static void aweather_gui_dispose (GObject *gobject)
 317 {
 318         //g_message("aweather_gui_dispose");
 319         AWeatherGui *gui = AWEATHER_GUI(gobject);
 320         g_object_unref(gui->view   );
 321         g_object_unref(gui->builder);
 322         g_object_unref(gui->window );
 323         g_object_unref(gui->tabs   );
 324         g_object_unref(gui->drawing);
 325         G_OBJECT_CLASS(aweather_gui_parent_class)->dispose(gobject);
 326 }
 327
 328 static void aweather_gui_finalize(GObject *gobject)
 329 {
 330         //g_message("aweather_gui_finalize");
 331         G_OBJECT_CLASS(aweather_gui_parent_class)->finalize(gobject);
 332 }
 333
 334 static void aweather_gui_class_init(AWeatherGuiClass *klass)
 335 {
 336         //g_message("aweather_gui_class_init");
 337         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 338         gobject_class->constructor  = aweather_gui_constructor;
 339         gobject_class->dispose      = aweather_gui_dispose;
 340         gobject_class->finalize     = aweather_gui_finalize;
 341 }
 342
 343 /* Methods */
 344 AWeatherGui *aweather_gui_new()
 345 {
 346         //g_message("aweather_gui_new");
 347         GError *error = NULL;
 348
 349         AWeatherGui *gui = g_object_new(AWEATHER_TYPE_GUI, NULL);
 350
 351         gui->builder = gtk_builder_new();
 352         if (!gtk_builder_add_from_file(gui->builder, DATADIR "/aweather/aweather.xml", &error))
 353                 g_error("Failed to create gtk builder: %s", error->message);
 354         gui->view    = aweather_view_new();
 355         gui->window  = GTK_WINDOW      (gtk_builder_get_object(gui->builder, "window"));
 356         gui->tabs    = GTK_NOTEBOOK    (gtk_builder_get_object(gui->builder, "tabs"));
 357         gui->drawing = GTK_DRAWING_AREA(gtk_builder_get_object(gui->builder, "drawing"));
 358         gtk_builder_connect_signals(gui->builder, gui);
 359
 360         /* Load components */
 361         site_setup(gui);
 362         time_setup(gui);
 363         opengl_setup(gui);
 364         return gui;
 365 }
 366 AWeatherView *aweather_gui_get_view(AWeatherGui *gui)
 367 {
 368         g_assert(AWEATHER_IS_GUI(gui));
 369         return gui->view;
 370 }
 371 GtkBuilder *aweather_gui_get_builder(AWeatherGui *gui)
 372 {
 373         g_assert(AWEATHER_IS_GUI(gui));
 374         return gui->builder;
 375 }
 376 GtkWidget *aweather_gui_get_widget(AWeatherGui *gui, const gchar *name)
 377 {
 378         g_assert(AWEATHER_IS_GUI(gui));
 379         GObject *widget = gtk_builder_get_object(gui->builder, name);
 380         g_assert(GTK_IS_WIDGET(widget));
 381         return GTK_WIDGET(widget);
 382 }
 383 void aweather_gui_gl_begin(AWeatherGui *gui)
 384 {
 385         g_assert(AWEATHER_IS_GUI(gui));
 386
 387         GtkDrawingArea *drawing    = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 388         GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(drawing));
 389         GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(drawing));
 390
 391         if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
 392                 g_assert_not_reached();
 393
 394         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 395 }
 396 void aweather_gui_gl_end(AWeatherGui *gui)
 397 {
 398         g_assert(AWEATHER_IS_GUI(gui));
 399         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 400         gdk_gl_drawable_gl_end(gldrawable);
 401 }
 402 void aweather_gui_gl_flush(AWeatherGui *gui)
 403 {
 404         g_assert(AWEATHER_IS_GUI(gui));
 405         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 406         if (gdk_gl_drawable_is_double_buffered(gldrawable))
 407                 gdk_gl_drawable_swap_buffers(gldrawable);
 408         else
 409                 glFlush();
 410         gdk_gl_drawable_gl_end(gldrawable);
 411 }
 412 //void aweather_gui_register_plugin(AWeatherGui *gui, AWeatherPlugin *plugin);