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