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 }
  50
  51 void on_time_changed(GtkTreeView *view, GtkTreePath *path,
  52                 GtkTreeViewColumn *column, AWeatherGui *gui)
  53 {
  54         gchar *time;
  55         GtkTreeIter iter;
  56         GtkTreeModel *model = gtk_tree_view_get_model(view);
  57         gtk_tree_model_get_iter(model, &iter, path);
  58         gtk_tree_model_get(model, &iter, 0, &time, -1);
  59         AWeatherView *aview = aweather_gui_get_view(gui);
  60         aweather_view_set_time(aview, time);
  61 }
  62
  63 static gboolean map(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
  64 {
  65         //g_message("map:map");
  66         AWeatherView *view = aweather_gui_get_view(gui);
  67         aweather_view_set_location(view, "IND");
  68
  69         /* Misc */
  70         glEnable(GL_BLEND);
  71         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  72         glClearColor(0.8f, 0.8f, 1.0f, 0.0f);
  73
  74         /* Tessellation, "finding intersecting triangles" */
  75         /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
  76         /* http://www.opengl.org/wiki/Alpha_Blending */
  77         glAlphaFunc(GL_GREATER,0.1);
  78         glEnable(GL_ALPHA_TEST);
  79
  80         /* Depth test */
  81         glClearDepth(1.0);
  82         glDepthFunc(GL_LEQUAL);
  83         glEnable(GL_DEPTH_TEST);
  84
  85         aweather_gui_gl_end(gui);
  86         return FALSE;
  87 }
  88
  89 static gboolean configure(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
  90 {
  91         aweather_gui_gl_begin(gui);
  92
  93         double width  = da->allocation.width;
  94         double height = da->allocation.height;
  95         double dist   = 500*1000; // 500 km
  96         double cam    = 300*1000; // 500 km
  97
  98         glViewport(0, 0, width, height);
  99
 100         /* Perspective */
 101         glMatrixMode(GL_PROJECTION);
 102         glLoadIdentity();
 103         double rad = atan(height/2*1000.0/dist); // 1px = 1000 meters
 104         double deg = (rad*180)/M_PI;
 105         gluPerspective(deg*2, width/height, cam-20, cam+20);
 106
 107         /* Camera position? */
 108         glMatrixMode(GL_MODELVIEW);
 109         glLoadIdentity();
 110         glTranslatef(0.0, 0.0, -cam);
 111         //glRotatef(-45, 1, 0, 0);
 112
 113         aweather_gui_gl_end(gui);
 114         return FALSE;
 115 }
 116
 117 static gboolean expose_begin(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 118 {
 119         aweather_gui_gl_begin(gui);
 120         return FALSE;
 121 }
 122 static gboolean expose_end(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 123 {
 124         g_message("aweather:espose_end\n");
 125         aweather_gui_gl_end(gui);
 126         aweather_gui_gl_flush(gui);
 127         return FALSE;
 128 }
 129
 130 /* TODO: replace the code in these with `gtk_tree_model_find' utility */
 131 static void update_time_widget(AWeatherView *view, char *time, AWeatherGui *gui)
 132 {
 133         g_message("updating time widget");
 134         GtkTreeView  *tview = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 135         GtkTreeModel *model = GTK_TREE_MODEL(gtk_tree_view_get_model(tview));
 136         for (int i = 0; i < gtk_tree_model_iter_n_children(model, NULL); i++) {
 137                 char *text;
 138                 GtkTreeIter iter;
 139                 gtk_tree_model_iter_nth_child(model, &iter, NULL, i);
 140                 gtk_tree_model_get(model, &iter, 0, &text, -1);
 141                 if (g_str_equal(text, time)) {
 142                         GtkTreePath *path = gtk_tree_model_get_path(model, &iter);
 143                         g_signal_handlers_block_by_func(tview, G_CALLBACK(on_site_changed), gui);
 144                         gtk_tree_view_set_cursor(tview, path, NULL, FALSE);
 145                         g_signal_handlers_unblock_by_func(tview, G_CALLBACK(on_site_changed), gui);
 146                         return;
 147                 }
 148         }
 149 }
 150 static void update_location_widget(AWeatherView *view, char *location, AWeatherGui *gui)
 151 {
 152         g_message("updating location widget to %s", location);
 153         GtkComboBox  *combo = GTK_COMBO_BOX(aweather_gui_get_widget(gui, "site"));
 154         GtkTreeModel *model = GTK_TREE_MODEL(gtk_combo_box_get_model(combo));
 155         for (int i = 0; i < gtk_tree_model_iter_n_children(model, NULL); i++) {
 156                 GtkTreeIter iter1;
 157                 gtk_tree_model_iter_nth_child(model, &iter1, NULL, i);
 158                 for (int i = 0; i < gtk_tree_model_iter_n_children(model, &iter1); i++) {
 159                         GtkTreeIter iter2;
 160                         gtk_tree_model_iter_nth_child(model, &iter2, &iter1, i);
 161                         char *text;
 162                         gtk_tree_model_get(model, &iter2, 1, &text, -1);
 163                         if (g_str_equal(text, location)) {
 164                                 GtkTreePath *path = gtk_tree_model_get_path(model, &iter2);
 165                                 g_signal_handlers_block_by_func(combo, G_CALLBACK(on_site_changed), gui);
 166                                 gtk_combo_box_set_active_iter(combo, &iter2);
 167                                 g_signal_handlers_unblock_by_func(combo, G_CALLBACK(on_site_changed), gui);
 168                                 return;
 169                         }
 170                 }
 171         }
 172 }
 173
 174 /*****************
 175  * Setup helpers *
 176  *****************/
 177 static void combo_sensitive(GtkCellLayout *cell_layout, GtkCellRenderer *cell,
 178                 GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data)
 179 {
 180         gboolean sensitive = !gtk_tree_model_iter_has_child(tree_model, iter);
 181         g_object_set(cell, "sensitive", sensitive, NULL);
 182 }
 183
 184 static void site_setup(AWeatherGui *gui)
 185 {
 186         GtkTreeIter state, city;
 187         GtkTreeStore *store = gtk_tree_store_new(2, G_TYPE_STRING, G_TYPE_STRING);
 188         for (int i = 0; cities[i].label; i++) {
 189                 if (cities[i].type == LOCATION_STATE) {
 190                         gtk_tree_store_append(store, &state, NULL);
 191                         gtk_tree_store_set   (store, &state, 0, cities[i].label,
 192                                                              1, cities[i].code,  -1);
 193                 } else {
 194                         gtk_tree_store_append(store, &city, &state);
 195                         gtk_tree_store_set   (store, &city, 0, cities[i].label,
 196                                                             1, cities[i].code,  -1);
 197                 }
 198         }
 199
 200         GtkWidget       *combo    = aweather_gui_get_widget(gui, "site");
 201         GtkCellRenderer *renderer = gtk_cell_renderer_text_new();
 202         gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), renderer, FALSE);
 203         gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo), renderer, "text", 0, NULL);
 204         gtk_combo_box_set_model(GTK_COMBO_BOX(combo), GTK_TREE_MODEL(store));
 205         gtk_cell_layout_set_cell_data_func(GTK_CELL_LAYOUT(combo), renderer,
 206                         combo_sensitive, NULL, NULL);
 207
 208         g_signal_connect(combo, "changed", G_CALLBACK(on_site_changed),  gui);
 209         AWeatherView *aview = aweather_gui_get_view(gui);
 210         g_signal_connect(aview, "location-changed", G_CALLBACK(update_location_widget), gui);
 211 }
 212
 213 static void time_setup(AWeatherGui *gui)
 214 {
 215         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 216         GtkTreeModel *store  = GTK_TREE_MODEL(gtk_list_store_new(1, G_TYPE_STRING));
 217         gtk_tree_view_set_model(tview, store);
 218
 219         GtkCellRenderer   *rend = gtk_cell_renderer_text_new();
 220         GtkTreeViewColumn *col  = gtk_tree_view_column_new_with_attributes(
 221                                         "Time", rend, "text", 0, NULL);
 222         gtk_tree_view_append_column(tview, col);
 223
 224         g_signal_connect(tview, "row-activated", G_CALLBACK(on_time_changed), gui);
 225         AWeatherView *aview = aweather_gui_get_view(gui);
 226         g_signal_connect(aview, "time-changed", G_CALLBACK(update_time_widget), gui);
 227 }
 228
 229 gboolean opengl_setup(AWeatherGui *gui)
 230 {
 231         GtkDrawingArea *drawing = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 232
 233         GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
 234                         GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
 235                         GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
 236         if (!glconfig)
 237                 g_error("Failed to create glconfig");
 238         if (!gtk_widget_set_gl_capability(GTK_WIDGET(drawing), glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
 239                 g_error("GL lacks required capabilities");
 240
 241         /* Set up OpenGL Stuff */
 242         g_signal_connect      (drawing, "map-event",       G_CALLBACK(map),          gui);
 243         g_signal_connect      (drawing, "configure-event", G_CALLBACK(configure),    gui);
 244         g_signal_connect      (drawing, "expose-event",    G_CALLBACK(expose_begin), gui);
 245         g_signal_connect_after(drawing, "expose-event",    G_CALLBACK(expose_end),   gui);
 246         return TRUE;
 247 }
 248
 249
 250 /****************
 251  * GObject code *
 252  ****************/
 253 G_DEFINE_TYPE(AWeatherGui, aweather_gui, G_TYPE_OBJECT);
 254
 255 /* Constructor / destructors */
 256 static void aweather_gui_init(AWeatherGui *gui)
 257 {
 258         //g_message("aweather_gui_init");
 259 }
 260
 261 static GObject *aweather_gui_constructor(GType gtype, guint n_properties,
 262                 GObjectConstructParam *properties)
 263 {
 264         //g_message("aweather_gui_constructor");
 265         GObjectClass *parent_class = G_OBJECT_CLASS(aweather_gui_parent_class);
 266         return  parent_class->constructor(gtype, n_properties, properties);
 267 }
 268
 269 static void aweather_gui_dispose (GObject *gobject)
 270 {
 271         //g_message("aweather_gui_dispose");
 272         AWeatherGui *gui = AWEATHER_GUI(gobject);
 273         g_object_unref(gui->view   );
 274         g_object_unref(gui->builder);
 275         g_object_unref(gui->window );
 276         g_object_unref(gui->tabs   );
 277         g_object_unref(gui->drawing);
 278         G_OBJECT_CLASS(aweather_gui_parent_class)->dispose(gobject);
 279 }
 280
 281 static void aweather_gui_finalize(GObject *gobject)
 282 {
 283         //g_message("aweather_gui_finalize");
 284         G_OBJECT_CLASS(aweather_gui_parent_class)->finalize(gobject);
 285 }
 286
 287 static void aweather_gui_class_init(AWeatherGuiClass *klass)
 288 {
 289         //g_message("aweather_gui_class_init");
 290         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 291         gobject_class->constructor  = aweather_gui_constructor;
 292         gobject_class->dispose      = aweather_gui_dispose;
 293         gobject_class->finalize     = aweather_gui_finalize;
 294 }
 295
 296 /* Methods */
 297 AWeatherGui *aweather_gui_new()
 298 {
 299         //g_message("aweather_gui_new");
 300         GError *error = NULL;
 301
 302         AWeatherGui *gui = g_object_new(AWEATHER_TYPE_GUI, NULL);
 303
 304         gui->builder = gtk_builder_new();
 305         if (!gtk_builder_add_from_file(gui->builder, DATADIR "/aweather/aweather.xml", &error))
 306                 g_error("Failed to create gtk builder: %s", error->message);
 307         gui->view    = aweather_view_new();
 308         gui->window  = GTK_WINDOW      (gtk_builder_get_object(gui->builder, "window"));
 309         gui->tabs    = GTK_NOTEBOOK    (gtk_builder_get_object(gui->builder, "tabs"));
 310         gui->drawing = GTK_DRAWING_AREA(gtk_builder_get_object(gui->builder, "drawing"));
 311         gtk_builder_connect_signals(gui->builder, NULL);
 312
 313         /* Load components */
 314         site_setup(gui);
 315         time_setup(gui);
 316         opengl_setup(gui);
 317         return gui;
 318 }
 319 AWeatherView *aweather_gui_get_view(AWeatherGui *gui)
 320 {
 321         g_assert(AWEATHER_IS_GUI(gui));
 322         return gui->view;
 323 }
 324 GtkBuilder *aweather_gui_get_builder(AWeatherGui *gui)
 325 {
 326         g_assert(AWEATHER_IS_GUI(gui));
 327         return gui->builder;
 328 }
 329 GtkWidget *aweather_gui_get_widget(AWeatherGui *gui, const gchar *name)
 330 {
 331         g_assert(AWEATHER_IS_GUI(gui));
 332         GObject *widget = gtk_builder_get_object(gui->builder, name);
 333         g_assert(GTK_IS_WIDGET(widget));
 334         return GTK_WIDGET(widget);
 335 }
 336 void aweather_gui_gl_begin(AWeatherGui *gui)
 337 {
 338         g_assert(AWEATHER_IS_GUI(gui));
 339
 340         GtkDrawingArea *drawing    = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 341         GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(drawing));
 342         GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(drawing));
 343
 344         if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
 345                 g_assert_not_reached();
 346
 347         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 348 }
 349 void aweather_gui_gl_end(AWeatherGui *gui)
 350 {
 351         g_assert(AWEATHER_IS_GUI(gui));
 352         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 353         gdk_gl_drawable_gl_end(gldrawable);
 354 }
 355 void aweather_gui_gl_flush(AWeatherGui *gui)
 356 {
 357         g_assert(AWEATHER_IS_GUI(gui));
 358         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 359         if (gdk_gl_drawable_is_double_buffered(gldrawable))
 360                 gdk_gl_drawable_swap_buffers(gldrawable);
 361         else
 362                 glFlush();
 363         gdk_gl_drawable_gl_end(gldrawable);
 364 }
 365 //void aweather_gui_register_plugin(AWeatherGui *gui, AWeatherPlugin *plugin);