Pileus Git - grits/blob - src/aweather-gui.c

   1 #include <config.h>
   2 #include <gtk/gtk.h>
   3 #include <gtk/gtkgl.h>
   4 #include <gdk/gdkkeysyms.h>
   5 #include <GL/gl.h>
   6 #include <GL/glu.h>
   7 #include <math.h>
   8
   9 #include "aweather-gui.h"
  10 #include "aweather-view.h"
  11 #include "location.h"
  12
  13 /*************
  14  * callbacks *
  15  *************/
  16 gboolean on_window_key_press_event(GtkWidget *widget, GdkEventKey *event, gpointer data)
  17 {
  18         if (event->keyval == GDK_q)
  19                 gtk_main_quit();
  20         return TRUE;
  21 }
  22
  23 void on_site_changed(GtkComboBox *combo, AWeatherGui *gui)
  24 {
  25         gchar *site;
  26         GtkTreeIter iter;
  27         GtkTreeModel *model = gtk_combo_box_get_model(combo);
  28         gtk_combo_box_get_active_iter(combo, &iter);
  29         gtk_tree_model_get(model, &iter, 1, &site, -1);
  30         AWeatherView *view = aweather_gui_get_view(gui);
  31         aweather_view_set_location(view, site);
  32 }
  33
  34 void on_time_changed(GtkTreeView *view, GtkTreePath *path,
  35                 GtkTreeViewColumn *column, AWeatherGui *gui)
  36 {
  37         gchar *time;
  38         GtkTreeIter iter;
  39         GtkTreeModel *model = gtk_tree_view_get_model(view);
  40         gtk_tree_model_get_iter(model, &iter, path);
  41         gtk_tree_model_get(model, &iter, 0, &time, -1);
  42         AWeatherView *aview = aweather_gui_get_view(gui);
  43         aweather_view_set_time(aview, time);
  44 }
  45
  46 static gboolean map(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
  47 {
  48         //g_message("map:map");
  49         AWeatherView *view = aweather_gui_get_view(gui);
  50         aweather_view_set_location(view, "IND");
  51
  52         /* Misc */
  53         glEnable(GL_BLEND);
  54         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  55         glClearColor(0.8f, 0.8f, 1.0f, 0.0f);
  56
  57         /* Tessellation, "finding intersecting triangles" */
  58         /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
  59         /* http://www.opengl.org/wiki/Alpha_Blending */
  60         glAlphaFunc(GL_GREATER,0.1);
  61         glEnable(GL_ALPHA_TEST);
  62
  63         /* Depth test */
  64         glClearDepth(1.0);
  65         glDepthFunc(GL_LEQUAL);
  66         glEnable(GL_DEPTH_TEST);
  67
  68         aweather_gui_gl_end(gui);
  69         return FALSE;
  70 }
  71
  72 static gboolean configure(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
  73 {
  74         aweather_gui_gl_begin(gui);
  75
  76         double width  = da->allocation.width;
  77         double height = da->allocation.height;
  78         double dist   = 500*1000; // 500 km
  79
  80         glViewport(0, 0, width, height);
  81
  82         /* Perspective */
  83         glMatrixMode(GL_PROJECTION);
  84         glLoadIdentity();
  85         double rad = atan(height/2*1000.0/dist); // 1px = 1000 meters
  86         double deg = (rad*180)/M_PI;
  87         gluPerspective(deg*2, width/height, dist-20, dist+20);
  88
  89         /* Camera position? */
  90         glMatrixMode(GL_MODELVIEW);
  91         glLoadIdentity();
  92         glTranslatef(0.0, 0.0, -dist);
  93         //glRotatef(-45, 1, 0, 0);
  94
  95         aweather_gui_gl_end(gui);
  96         return FALSE;
  97 }
  98
  99 static gboolean expose_begin(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 100 {
 101         aweather_gui_gl_begin(gui);
 102         return FALSE;
 103 }
 104 static gboolean expose_end(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 105 {
 106         g_message("aweather:espose_end\n");
 107         aweather_gui_gl_end(gui);
 108         aweather_gui_gl_flush(gui);
 109         return FALSE;
 110 }
 111
 112 /* TODO: replace the code in these with `gtk_tree_model_find' utility */
 113 static void update_time_widget(AWeatherView *view, char *time, AWeatherGui *gui)
 114 {
 115         g_message("updating time widget");
 116         GtkTreeView  *tview = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 117         GtkTreeModel *model = GTK_TREE_MODEL(gtk_tree_view_get_model(tview));
 118         for (int i = 0; i < gtk_tree_model_iter_n_children(model, NULL); i++) {
 119                 char *text;
 120                 GtkTreeIter iter;
 121                 gtk_tree_model_iter_nth_child(model, &iter, NULL, i);
 122                 gtk_tree_model_get(model, &iter, 0, &text, -1);
 123                 if (g_str_equal(text, time)) {
 124                         GtkTreePath *path = gtk_tree_model_get_path(model, &iter);
 125                         g_signal_handlers_block_by_func(tview, G_CALLBACK(on_site_changed), gui);
 126                         gtk_tree_view_set_cursor(tview, path, NULL, FALSE);
 127                         g_signal_handlers_unblock_by_func(tview, G_CALLBACK(on_site_changed), gui);
 128                         return;
 129                 }
 130         }
 131 }
 132 static void update_location_widget(AWeatherView *view, char *location, AWeatherGui *gui)
 133 {
 134         g_message("updating location widget to %s", location);
 135         GtkComboBox  *combo = GTK_COMBO_BOX(aweather_gui_get_widget(gui, "site"));
 136         GtkTreeModel *model = GTK_TREE_MODEL(gtk_combo_box_get_model(combo));
 137         for (int i = 0; i < gtk_tree_model_iter_n_children(model, NULL); i++) {
 138                 GtkTreeIter iter1;
 139                 gtk_tree_model_iter_nth_child(model, &iter1, NULL, i);
 140                 for (int i = 0; i < gtk_tree_model_iter_n_children(model, &iter1); i++) {
 141                         GtkTreeIter iter2;
 142                         gtk_tree_model_iter_nth_child(model, &iter2, &iter1, i);
 143                         char *text;
 144                         gtk_tree_model_get(model, &iter2, 1, &text, -1);
 145                         if (g_str_equal(text, location)) {
 146                                 GtkTreePath *path = gtk_tree_model_get_path(model, &iter2);
 147                                 g_signal_handlers_block_by_func(combo, G_CALLBACK(on_site_changed), gui);
 148                                 gtk_combo_box_set_active_iter(combo, &iter2);
 149                                 g_signal_handlers_unblock_by_func(combo, G_CALLBACK(on_site_changed), gui);
 150                                 return;
 151                         }
 152                 }
 153         }
 154 }
 155
 156 /*****************
 157  * Setup helpers *
 158  *****************/
 159 static void combo_sensitive(GtkCellLayout *cell_layout, GtkCellRenderer *cell,
 160                 GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data)
 161 {
 162         gboolean sensitive = !gtk_tree_model_iter_has_child(tree_model, iter);
 163         g_object_set(cell, "sensitive", sensitive, NULL);
 164 }
 165
 166 static void site_setup(AWeatherGui *gui)
 167 {
 168         GtkTreeIter state, city;
 169         GtkTreeStore *store = gtk_tree_store_new(2, G_TYPE_STRING, G_TYPE_STRING);
 170         for (int i = 0; cities[i].label; i++) {
 171                 if (cities[i].type == LOCATION_STATE) {
 172                         gtk_tree_store_append(store, &state, NULL);
 173                         gtk_tree_store_set   (store, &state, 0, cities[i].label,
 174                                                              1, cities[i].code,  -1);
 175                 } else {
 176                         gtk_tree_store_append(store, &city, &state);
 177                         gtk_tree_store_set   (store, &city, 0, cities[i].label,
 178                                                             1, cities[i].code,  -1);
 179                 }
 180         }
 181
 182         GtkWidget       *combo    = aweather_gui_get_widget(gui, "site");
 183         GtkCellRenderer *renderer = gtk_cell_renderer_text_new();
 184         gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), renderer, FALSE);
 185         gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo), renderer, "text", 0, NULL);
 186         gtk_combo_box_set_model(GTK_COMBO_BOX(combo), GTK_TREE_MODEL(store));
 187         gtk_cell_layout_set_cell_data_func(GTK_CELL_LAYOUT(combo), renderer,
 188                         combo_sensitive, NULL, NULL);
 189
 190         g_signal_connect(combo, "changed", G_CALLBACK(on_site_changed),  gui);
 191         AWeatherView *aview = aweather_gui_get_view(gui);
 192         g_signal_connect(aview, "location-changed", G_CALLBACK(update_location_widget), gui);
 193 }
 194
 195 static void time_setup(AWeatherGui *gui)
 196 {
 197         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 198         GtkTreeModel *store  = GTK_TREE_MODEL(gtk_list_store_new(1, G_TYPE_STRING));
 199         gtk_tree_view_set_model(tview, store);
 200
 201         GtkCellRenderer   *rend = gtk_cell_renderer_text_new();
 202         GtkTreeViewColumn *col  = gtk_tree_view_column_new_with_attributes(
 203                                         "Time", rend, "text", 0, NULL);
 204         gtk_tree_view_append_column(tview, col);
 205
 206         g_signal_connect(tview, "row-activated", G_CALLBACK(on_time_changed), gui);
 207         AWeatherView *aview = aweather_gui_get_view(gui);
 208         g_signal_connect(aview, "time-changed", G_CALLBACK(update_time_widget), gui);
 209 }
 210
 211 gboolean opengl_setup(AWeatherGui *gui)
 212 {
 213         GtkDrawingArea *drawing = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 214
 215         GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
 216                         GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
 217                         GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
 218         if (!glconfig)
 219                 g_error("Failed to create glconfig");
 220         if (!gtk_widget_set_gl_capability(GTK_WIDGET(drawing), glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
 221                 g_error("GL lacks required capabilities");
 222
 223         /* Set up OpenGL Stuff */
 224         g_signal_connect      (drawing, "map-event",       G_CALLBACK(map),          gui);
 225         g_signal_connect      (drawing, "configure-event", G_CALLBACK(configure),    gui);
 226         g_signal_connect      (drawing, "expose-event",    G_CALLBACK(expose_begin), gui);
 227         g_signal_connect_after(drawing, "expose-event",    G_CALLBACK(expose_end),   gui);
 228         return TRUE;
 229 }
 230
 231
 232 /****************
 233  * GObject code *
 234  ****************/
 235 G_DEFINE_TYPE(AWeatherGui, aweather_gui, G_TYPE_OBJECT);
 236
 237 /* Constructor / destructors */
 238 static void aweather_gui_init(AWeatherGui *gui)
 239 {
 240         //g_message("aweather_gui_init");
 241 }
 242
 243 static GObject *aweather_gui_constructor(GType gtype, guint n_properties,
 244                 GObjectConstructParam *properties)
 245 {
 246         //g_message("aweather_gui_constructor");
 247         GObjectClass *parent_class = G_OBJECT_CLASS(aweather_gui_parent_class);
 248         return  parent_class->constructor(gtype, n_properties, properties);
 249 }
 250
 251 static void aweather_gui_dispose (GObject *gobject)
 252 {
 253         //g_message("aweather_gui_dispose");
 254         AWeatherGui *gui = AWEATHER_GUI(gobject);
 255         g_object_unref(gui->view   );
 256         g_object_unref(gui->builder);
 257         g_object_unref(gui->window );
 258         g_object_unref(gui->tabs   );
 259         g_object_unref(gui->drawing);
 260         G_OBJECT_CLASS(aweather_gui_parent_class)->dispose(gobject);
 261 }
 262
 263 static void aweather_gui_finalize(GObject *gobject)
 264 {
 265         //g_message("aweather_gui_finalize");
 266         G_OBJECT_CLASS(aweather_gui_parent_class)->finalize(gobject);
 267 }
 268
 269 static void aweather_gui_class_init(AWeatherGuiClass *klass)
 270 {
 271         //g_message("aweather_gui_class_init");
 272         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 273         gobject_class->constructor  = aweather_gui_constructor;
 274         gobject_class->dispose      = aweather_gui_dispose;
 275         gobject_class->finalize     = aweather_gui_finalize;
 276 }
 277
 278 /* Methods */
 279 AWeatherGui *aweather_gui_new()
 280 {
 281         //g_message("aweather_gui_new");
 282         GError *error = NULL;
 283
 284         AWeatherGui *gui = g_object_new(AWEATHER_TYPE_GUI, NULL);
 285
 286         gui->builder = gtk_builder_new();
 287         if (!gtk_builder_add_from_file(gui->builder, DATADIR "/aweather/aweather.xml", &error))
 288                 g_error("Failed to create gtk builder: %s", error->message);
 289         gui->view    = aweather_view_new();
 290         gui->window  = GTK_WINDOW      (gtk_builder_get_object(gui->builder, "window"));
 291         gui->tabs    = GTK_NOTEBOOK    (gtk_builder_get_object(gui->builder, "tabs"));
 292         gui->drawing = GTK_DRAWING_AREA(gtk_builder_get_object(gui->builder, "drawing"));
 293         gtk_builder_connect_signals(gui->builder, NULL);
 294
 295         /* Load components */
 296         site_setup(gui);
 297         time_setup(gui);
 298         opengl_setup(gui);
 299         return gui;
 300 }
 301 AWeatherView *aweather_gui_get_view(AWeatherGui *gui)
 302 {
 303         g_assert(AWEATHER_IS_GUI(gui));
 304         return gui->view;
 305 }
 306 GtkBuilder *aweather_gui_get_builder(AWeatherGui *gui)
 307 {
 308         g_assert(AWEATHER_IS_GUI(gui));
 309         return gui->builder;
 310 }
 311 GtkWidget *aweather_gui_get_widget(AWeatherGui *gui, const gchar *name)
 312 {
 313         g_assert(AWEATHER_IS_GUI(gui));
 314         GObject *widget = gtk_builder_get_object(gui->builder, name);
 315         g_assert(GTK_IS_WIDGET(widget));
 316         return GTK_WIDGET(widget);
 317 }
 318 void aweather_gui_gl_begin(AWeatherGui *gui)
 319 {
 320         g_assert(AWEATHER_IS_GUI(gui));
 321
 322         GtkDrawingArea *drawing    = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 323         GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(drawing));
 324         GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(drawing));
 325
 326         if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
 327                 g_assert_not_reached();
 328
 329         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 330 }
 331 void aweather_gui_gl_end(AWeatherGui *gui)
 332 {
 333         g_assert(AWEATHER_IS_GUI(gui));
 334         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 335         gdk_gl_drawable_gl_end(gldrawable);
 336 }
 337 void aweather_gui_gl_flush(AWeatherGui *gui)
 338 {
 339         g_assert(AWEATHER_IS_GUI(gui));
 340         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 341         if (gdk_gl_drawable_is_double_buffered(gldrawable))
 342                 gdk_gl_drawable_swap_buffers(gldrawable);
 343         else
 344                 glFlush();
 345         gdk_gl_drawable_gl_end(gldrawable);
 346 }
 347 //void aweather_gui_register_plugin(AWeatherGui *gui, AWeatherPlugin *plugin);