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         gchar *site;
  25         GtkTreeIter iter;
  26         AWeatherView *view  = aweather_gui_get_view(gui);
  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         aweather_view_set_location(view, site);
  31 }
  32
  33 void on_time_changed() {
  34         //gchar *site;
  35         //GtkTreeIter iter;
  36         //AWeatherView *view  = aweather_gui_get_view(gui);
  37         //GtkTreeModel *model = gtk_combo_box_get_model(combo);
  38         //gtk_combo_box_get_active_iter(combo, &iter);
  39         //gtk_tree_model_get(model, &iter, 1, &site, 0);
  40         //aweather_view_set_time(view, site);
  41 }
  42
  43 static gboolean configure_start(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
  44 {
  45         AWeatherView *view = aweather_gui_get_view(gui);
  46         aweather_view_set_location(view, "IND");
  47
  48         //g_message("opengl:configure_start");
  49         GdkGLContext  *glcontext  = gtk_widget_get_gl_context(da);
  50         GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(da);
  51
  52         if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
  53                 g_assert_not_reached();
  54
  55         double width  = da->allocation.width;
  56         double height = da->allocation.height;
  57         double dist   = 500*1000; // 500 km
  58
  59         /* Misc */
  60         glViewport(0, 0, width, height);
  61         glEnable(GL_BLEND);
  62         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  63         glClearColor(0.8f, 0.8f, 1.0f, 0.0f);
  64
  65         /* Tessellation, "finding intersecting triangles" */
  66         /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
  67         /* http://www.opengl.org/wiki/Alpha_Blending */
  68         glAlphaFunc(GL_GREATER,0.1);
  69         glEnable(GL_ALPHA_TEST);
  70
  71         /* Depth test */
  72         glClearDepth(1.0);
  73         glDepthFunc(GL_LEQUAL);
  74         glEnable(GL_DEPTH_TEST);
  75
  76         /* Perspective */
  77         glMatrixMode(GL_PROJECTION);
  78         glLoadIdentity();
  79         double rad = atan(height/2*1000.0/dist); // 1px = 1000 meters
  80         double deg = (rad*180)/M_PI;
  81         gluPerspective(deg*2, width/height, dist-20, dist+20);
  82
  83         /* Camera position? */
  84         glMatrixMode(GL_MODELVIEW);
  85         glLoadIdentity();
  86         glTranslatef(0.0, 0.0, -dist);
  87         //glRotatef(-45, 1, 0, 0);
  88
  89
  90         return FALSE;
  91 }
  92 static gboolean configure_end(GtkWidget *da, GdkEventConfigure *event, gpointer user_data)
  93 {
  94         //g_message("opengl:configure_end");
  95         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
  96         gdk_gl_drawable_gl_end(gldrawable);
  97         return FALSE;
  98 }
  99 static gboolean expose_end(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 100 {
 101         aweather_gui_gl_flush(gui);
 102         return FALSE;
 103 }
 104
 105 /*****************
 106  * Setup helpers *
 107  *****************/
 108 static void combo_sensitive(GtkCellLayout *cell_layout, GtkCellRenderer *cell,
 109                 GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data)
 110 {
 111         gboolean sensitive = !gtk_tree_model_iter_has_child(tree_model, iter);
 112         g_object_set(cell, "sensitive", sensitive, NULL);
 113 }
 114
 115 static void site_setup(AWeatherGui *gui)
 116 {
 117         GtkTreeIter state, city;
 118         GtkTreeStore *store = gtk_tree_store_new(2, G_TYPE_STRING, G_TYPE_STRING);
 119         for (int i = 0; cities[i].label; i++) {
 120                 if (cities[i].type == LOCATION_STATE) {
 121                         gtk_tree_store_append(store, &state, NULL);
 122                         gtk_tree_store_set   (store, &state, 0, cities[i].label,
 123                                                              1, cities[i].code,  -1);
 124                 } else {
 125                         gtk_tree_store_append(store, &city, &state);
 126                         gtk_tree_store_set   (store, &city, 0, cities[i].label,
 127                                                             1, cities[i].code,  -1);
 128                 }
 129         }
 130
 131         GtkBuilder      *builder  = aweather_gui_get_builder(gui);
 132         GtkWidget       *combo    = GTK_WIDGET(gtk_builder_get_object(builder, "site"));
 133         GtkCellRenderer *renderer = gtk_cell_renderer_text_new();
 134         gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), renderer, FALSE);
 135         gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo), renderer, "text", 0, NULL);
 136         gtk_combo_box_set_model(GTK_COMBO_BOX(combo), GTK_TREE_MODEL(store));
 137         gtk_cell_layout_set_cell_data_func(GTK_CELL_LAYOUT(combo), renderer,
 138                         combo_sensitive, NULL, NULL);
 139
 140         g_signal_connect(combo, "changed", G_CALLBACK(on_site_changed),  gui);
 141 }
 142
 143 static void time_setup(AWeatherGui *gui)
 144 {
 145         GtkBuilder        *builder  = aweather_gui_get_builder(gui);
 146         GtkWidget         *time     = GTK_WIDGET(gtk_builder_get_object(builder, "time"));
 147         GtkCellRenderer   *rend     = gtk_cell_renderer_text_new();
 148         GtkTreeViewColumn *col      = gtk_tree_view_column_new_with_attributes(
 149                                         "Time", rend, 0, "text", NULL);
 150         gtk_tree_view_append_column(GTK_TREE_VIEW(time), col);
 151
 152         GtkTreeStore *store = gtk_tree_store_new(1, G_TYPE_STRING);
 153         gtk_tree_view_set_model(GTK_TREE_VIEW(time), GTK_TREE_MODEL(store));
 154
 155         g_signal_connect(time, "row-activated", G_CALLBACK(on_time_changed), gui);
 156 }
 157
 158 gboolean opengl_setup(AWeatherGui *gui)
 159 {
 160         GtkDrawingArea *drawing = aweather_gui_get_drawing(gui);
 161
 162         GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
 163                         GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
 164                         GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
 165         if (!glconfig)
 166                 g_error("Failed to create glconfig");
 167         if (!gtk_widget_set_gl_capability(GTK_WIDGET(drawing), glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
 168                 g_error("GL lacks required capabilities");
 169
 170         /* Set up OpenGL Stuff */
 171         g_signal_connect      (drawing, "configure-event", G_CALLBACK(configure_start), gui);
 172         g_signal_connect_after(drawing, "configure-event", G_CALLBACK(configure_end),   gui);
 173         g_signal_connect_after(drawing, "expose-event",    G_CALLBACK(expose_end),      gui);
 174         return TRUE;
 175 }
 176
 177
 178 /****************
 179  * GObject code *
 180  ****************/
 181 G_DEFINE_TYPE(AWeatherGui, aweather_gui, G_TYPE_OBJECT);
 182
 183 /* Constructor / destructors */
 184 static void aweather_gui_init(AWeatherGui *gui)
 185 {
 186         //g_message("aweather_gui_init");
 187         /* Default values */
 188         gui->view    = NULL;
 189         gui->builder = NULL;
 190         gui->window  = NULL;
 191         gui->tabs    = NULL;
 192         gui->drawing = NULL;
 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 GtkWindow *aweather_gui_get_window(AWeatherGui *gui)
 264 {
 265         g_assert(AWEATHER_IS_GUI(gui));
 266         return gui->window;
 267 }
 268 GtkNotebook *aweather_gui_get_tabs(AWeatherGui *gui)
 269 {
 270         g_assert(AWEATHER_IS_GUI(gui));
 271         return gui->tabs;
 272 }
 273 GtkDrawingArea *aweather_gui_get_drawing(AWeatherGui *gui)
 274 {
 275         g_assert(AWEATHER_IS_GUI(gui));
 276         return gui->drawing;
 277 }
 278 void aweather_gui_gl_begin(AWeatherGui *gui)
 279 {
 280         g_assert(AWEATHER_IS_GUI(gui));
 281
 282         GtkDrawingArea *drawing    = aweather_gui_get_drawing(gui);
 283         GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(drawing));
 284         GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(drawing));
 285
 286         if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
 287                 g_assert_not_reached();
 288
 289         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 290 }
 291 void aweather_gui_gl_end(AWeatherGui *gui)
 292 {
 293         g_assert(AWEATHER_IS_GUI(gui));
 294         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 295         gdk_gl_drawable_gl_end(gldrawable);
 296 }
 297 void aweather_gui_gl_flush(AWeatherGui *gui)
 298 {
 299         g_assert(AWEATHER_IS_GUI(gui));
 300         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 301         if (gdk_gl_drawable_is_double_buffered(gldrawable))
 302                 gdk_gl_drawable_swap_buffers(gldrawable);
 303         else
 304                 glFlush();
 305         gdk_gl_drawable_gl_end(gldrawable);
 306 }
 307 //void aweather_gui_register_plugin(AWeatherGui *gui, AWeatherPlugin *plugin);