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 /*****************
 113  * Setup helpers *
 114  *****************/
 115 static void combo_sensitive(GtkCellLayout *cell_layout, GtkCellRenderer *cell,
 116                 GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data)
 117 {
 118         gboolean sensitive = !gtk_tree_model_iter_has_child(tree_model, iter);
 119         g_object_set(cell, "sensitive", sensitive, NULL);
 120 }
 121
 122 static void site_setup(AWeatherGui *gui)
 123 {
 124         GtkTreeIter state, city;
 125         GtkTreeStore *store = gtk_tree_store_new(2, G_TYPE_STRING, G_TYPE_STRING);
 126         for (int i = 0; cities[i].label; i++) {
 127                 if (cities[i].type == LOCATION_STATE) {
 128                         gtk_tree_store_append(store, &state, NULL);
 129                         gtk_tree_store_set   (store, &state, 0, cities[i].label,
 130                                                              1, cities[i].code,  -1);
 131                 } else {
 132                         gtk_tree_store_append(store, &city, &state);
 133                         gtk_tree_store_set   (store, &city, 0, cities[i].label,
 134                                                             1, cities[i].code,  -1);
 135                 }
 136         }
 137
 138         GtkWidget       *combo    = aweather_gui_get_widget(gui, "site");
 139         GtkCellRenderer *renderer = gtk_cell_renderer_text_new();
 140         gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), renderer, FALSE);
 141         gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo), renderer, "text", 0, NULL);
 142         gtk_combo_box_set_model(GTK_COMBO_BOX(combo), GTK_TREE_MODEL(store));
 143         gtk_cell_layout_set_cell_data_func(GTK_CELL_LAYOUT(combo), renderer,
 144                         combo_sensitive, NULL, NULL);
 145
 146         g_signal_connect(combo, "changed", G_CALLBACK(on_site_changed),  gui);
 147 }
 148
 149 static void time_setup(AWeatherGui *gui)
 150 {
 151         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 152         GtkTreeModel *store  = GTK_TREE_MODEL(gtk_list_store_new(1, G_TYPE_STRING));
 153         gtk_tree_view_set_model(tview, store);
 154
 155         GtkCellRenderer   *rend = gtk_cell_renderer_text_new();
 156         GtkTreeViewColumn *col  = gtk_tree_view_column_new_with_attributes(
 157                                         "Time", rend, "text", 0, NULL);
 158         gtk_tree_view_append_column(tview, col);
 159
 160         g_signal_connect(tview, "row-activated", G_CALLBACK(on_time_changed), gui);
 161 }
 162
 163 gboolean opengl_setup(AWeatherGui *gui)
 164 {
 165         GtkDrawingArea *drawing = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 166
 167         GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
 168                         GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
 169                         GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
 170         if (!glconfig)
 171                 g_error("Failed to create glconfig");
 172         if (!gtk_widget_set_gl_capability(GTK_WIDGET(drawing), glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
 173                 g_error("GL lacks required capabilities");
 174
 175         /* Set up OpenGL Stuff */
 176         g_signal_connect      (drawing, "map-event",       G_CALLBACK(map),          gui);
 177         g_signal_connect      (drawing, "configure-event", G_CALLBACK(configure),    gui);
 178         g_signal_connect      (drawing, "expose-event",    G_CALLBACK(expose_begin), gui);
 179         g_signal_connect_after(drawing, "expose-event",    G_CALLBACK(expose_end),   gui);
 180         return TRUE;
 181 }
 182
 183
 184 /****************
 185  * GObject code *
 186  ****************/
 187 G_DEFINE_TYPE(AWeatherGui, aweather_gui, G_TYPE_OBJECT);
 188
 189 /* Constructor / destructors */
 190 static void aweather_gui_init(AWeatherGui *gui)
 191 {
 192         //g_message("aweather_gui_init");
 193 }
 194
 195 static GObject *aweather_gui_constructor(GType gtype, guint n_properties,
 196                 GObjectConstructParam *properties)
 197 {
 198         //g_message("aweather_gui_constructor");
 199         GObjectClass *parent_class = G_OBJECT_CLASS(aweather_gui_parent_class);
 200         return  parent_class->constructor(gtype, n_properties, properties);
 201 }
 202
 203 static void aweather_gui_dispose (GObject *gobject)
 204 {
 205         //g_message("aweather_gui_dispose");
 206         AWeatherGui *gui = AWEATHER_GUI(gobject);
 207         g_object_unref(gui->view   );
 208         g_object_unref(gui->builder);
 209         g_object_unref(gui->window );
 210         g_object_unref(gui->tabs   );
 211         g_object_unref(gui->drawing);
 212         G_OBJECT_CLASS(aweather_gui_parent_class)->dispose(gobject);
 213 }
 214
 215 static void aweather_gui_finalize(GObject *gobject)
 216 {
 217         //g_message("aweather_gui_finalize");
 218         G_OBJECT_CLASS(aweather_gui_parent_class)->finalize(gobject);
 219 }
 220
 221 static void aweather_gui_class_init(AWeatherGuiClass *klass)
 222 {
 223         //g_message("aweather_gui_class_init");
 224         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 225         gobject_class->constructor  = aweather_gui_constructor;
 226         gobject_class->dispose      = aweather_gui_dispose;
 227         gobject_class->finalize     = aweather_gui_finalize;
 228 }
 229
 230 /* Methods */
 231 AWeatherGui *aweather_gui_new()
 232 {
 233         //g_message("aweather_gui_new");
 234         GError *error = NULL;
 235
 236         AWeatherGui *gui = g_object_new(AWEATHER_TYPE_GUI, NULL);
 237
 238         gui->builder = gtk_builder_new();
 239         if (!gtk_builder_add_from_file(gui->builder, DATADIR "/aweather/aweather.xml", &error))
 240                 g_error("Failed to create gtk builder: %s", error->message);
 241         gui->view    = aweather_view_new();
 242         gui->window  = GTK_WINDOW      (gtk_builder_get_object(gui->builder, "window"));
 243         gui->tabs    = GTK_NOTEBOOK    (gtk_builder_get_object(gui->builder, "tabs"));
 244         gui->drawing = GTK_DRAWING_AREA(gtk_builder_get_object(gui->builder, "drawing"));
 245         gtk_builder_connect_signals(gui->builder, NULL);
 246
 247         /* Load components */
 248         site_setup(gui);
 249         time_setup(gui);
 250         opengl_setup(gui);
 251         return gui;
 252 }
 253 AWeatherView *aweather_gui_get_view(AWeatherGui *gui)
 254 {
 255         g_assert(AWEATHER_IS_GUI(gui));
 256         return gui->view;
 257 }
 258 GtkBuilder *aweather_gui_get_builder(AWeatherGui *gui)
 259 {
 260         g_assert(AWEATHER_IS_GUI(gui));
 261         return gui->builder;
 262 }
 263 GtkWidget *aweather_gui_get_widget(AWeatherGui *gui, const gchar *name)
 264 {
 265         g_assert(AWEATHER_IS_GUI(gui));
 266         GObject *widget = gtk_builder_get_object(gui->builder, name);
 267         g_assert(GTK_IS_WIDGET(widget));
 268         return GTK_WIDGET(widget);
 269 }
 270 void aweather_gui_gl_begin(AWeatherGui *gui)
 271 {
 272         g_assert(AWEATHER_IS_GUI(gui));
 273
 274         GtkDrawingArea *drawing    = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 275         GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(drawing));
 276         GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(drawing));
 277
 278         if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
 279                 g_assert_not_reached();
 280
 281         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 282 }
 283 void aweather_gui_gl_end(AWeatherGui *gui)
 284 {
 285         g_assert(AWEATHER_IS_GUI(gui));
 286         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 287         gdk_gl_drawable_gl_end(gldrawable);
 288 }
 289 void aweather_gui_gl_flush(AWeatherGui *gui)
 290 {
 291         g_assert(AWEATHER_IS_GUI(gui));
 292         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 293         if (gdk_gl_drawable_is_double_buffered(gldrawable))
 294                 gdk_gl_drawable_swap_buffers(gldrawable);
 295         else
 296                 glFlush();
 297         gdk_gl_drawable_gl_end(gldrawable);
 298 }
 299 //void aweather_gui_register_plugin(AWeatherGui *gui, AWeatherPlugin *plugin);