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 map(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
  44 {
  45         //g_message("map:map");
  46         AWeatherView *view = aweather_gui_get_view(gui);
  47         aweather_view_set_location(view, "IND");
  48
  49         /* Misc */
  50         glEnable(GL_BLEND);
  51         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  52         glClearColor(0.8f, 0.8f, 1.0f, 0.0f);
  53
  54         /* Tessellation, "finding intersecting triangles" */
  55         /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
  56         /* http://www.opengl.org/wiki/Alpha_Blending */
  57         glAlphaFunc(GL_GREATER,0.1);
  58         glEnable(GL_ALPHA_TEST);
  59
  60         /* Depth test */
  61         glClearDepth(1.0);
  62         glDepthFunc(GL_LEQUAL);
  63         glEnable(GL_DEPTH_TEST);
  64
  65         aweather_gui_gl_end(gui);
  66         return FALSE;
  67 }
  68
  69 static gboolean configure(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
  70 {
  71         aweather_gui_gl_begin(gui);
  72
  73         double width  = da->allocation.width;
  74         double height = da->allocation.height;
  75         double dist   = 500*1000; // 500 km
  76
  77         glViewport(0, 0, width, height);
  78
  79         /* Perspective */
  80         glMatrixMode(GL_PROJECTION);
  81         glLoadIdentity();
  82         double rad = atan(height/2*1000.0/dist); // 1px = 1000 meters
  83         double deg = (rad*180)/M_PI;
  84         gluPerspective(deg*2, width/height, dist-20, dist+20);
  85
  86         /* Camera position? */
  87         glMatrixMode(GL_MODELVIEW);
  88         glLoadIdentity();
  89         glTranslatef(0.0, 0.0, -dist);
  90         //glRotatef(-45, 1, 0, 0);
  91
  92         aweather_gui_gl_end(gui);
  93         return FALSE;
  94 }
  95
  96 static gboolean expose_begin(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
  97 {
  98         aweather_gui_gl_begin(gui);
  99         return FALSE;
 100 }
 101 static gboolean expose_end(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 102 {
 103         g_message("aweather:espose_end\n");
 104         aweather_gui_gl_end(gui);
 105         aweather_gui_gl_flush(gui);
 106         return FALSE;
 107 }
 108
 109 /*****************
 110  * Setup helpers *
 111  *****************/
 112 static void combo_sensitive(GtkCellLayout *cell_layout, GtkCellRenderer *cell,
 113                 GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data)
 114 {
 115         gboolean sensitive = !gtk_tree_model_iter_has_child(tree_model, iter);
 116         g_object_set(cell, "sensitive", sensitive, NULL);
 117 }
 118
 119 static void site_setup(AWeatherGui *gui)
 120 {
 121         GtkTreeIter state, city;
 122         GtkTreeStore *store = gtk_tree_store_new(2, G_TYPE_STRING, G_TYPE_STRING);
 123         for (int i = 0; cities[i].label; i++) {
 124                 if (cities[i].type == LOCATION_STATE) {
 125                         gtk_tree_store_append(store, &state, NULL);
 126                         gtk_tree_store_set   (store, &state, 0, cities[i].label,
 127                                                              1, cities[i].code,  -1);
 128                 } else {
 129                         gtk_tree_store_append(store, &city, &state);
 130                         gtk_tree_store_set   (store, &city, 0, cities[i].label,
 131                                                             1, cities[i].code,  -1);
 132                 }
 133         }
 134
 135         GtkBuilder      *builder  = aweather_gui_get_builder(gui);
 136         GtkWidget       *combo    = GTK_WIDGET(gtk_builder_get_object(builder, "site"));
 137         GtkCellRenderer *renderer = gtk_cell_renderer_text_new();
 138         gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), renderer, FALSE);
 139         gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo), renderer, "text", 0, NULL);
 140         gtk_combo_box_set_model(GTK_COMBO_BOX(combo), GTK_TREE_MODEL(store));
 141         gtk_cell_layout_set_cell_data_func(GTK_CELL_LAYOUT(combo), renderer,
 142                         combo_sensitive, NULL, NULL);
 143
 144         g_signal_connect(combo, "changed", G_CALLBACK(on_site_changed),  gui);
 145 }
 146
 147 static void time_setup(AWeatherGui *gui)
 148 {
 149         GtkBuilder        *builder  = aweather_gui_get_builder(gui);
 150         GtkWidget         *time     = GTK_WIDGET(gtk_builder_get_object(builder, "time"));
 151         GtkCellRenderer   *rend     = gtk_cell_renderer_text_new();
 152         GtkTreeViewColumn *col      = gtk_tree_view_column_new_with_attributes(
 153                                         "Time", rend, 0, "text", NULL);
 154         gtk_tree_view_append_column(GTK_TREE_VIEW(time), col);
 155
 156         GtkTreeStore *store = gtk_tree_store_new(1, G_TYPE_STRING);
 157         gtk_tree_view_set_model(GTK_TREE_VIEW(time), GTK_TREE_MODEL(store));
 158
 159         g_signal_connect(time, "row-activated", G_CALLBACK(on_time_changed), gui);
 160 }
 161
 162 gboolean opengl_setup(AWeatherGui *gui)
 163 {
 164         GtkDrawingArea *drawing = aweather_gui_get_drawing(gui);
 165
 166         GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
 167                         GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
 168                         GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
 169         if (!glconfig)
 170                 g_error("Failed to create glconfig");
 171         if (!gtk_widget_set_gl_capability(GTK_WIDGET(drawing), glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
 172                 g_error("GL lacks required capabilities");
 173
 174         /* Set up OpenGL Stuff */
 175         g_signal_connect      (drawing, "map-event",       G_CALLBACK(map),          gui);
 176         g_signal_connect      (drawing, "configure-event", G_CALLBACK(configure),    gui);
 177         g_signal_connect      (drawing, "expose-event",    G_CALLBACK(expose_begin), gui);
 178         g_signal_connect_after(drawing, "expose-event",    G_CALLBACK(expose_end),   gui);
 179         return TRUE;
 180 }
 181
 182
 183 /****************
 184  * GObject code *
 185  ****************/
 186 G_DEFINE_TYPE(AWeatherGui, aweather_gui, G_TYPE_OBJECT);
 187
 188 /* Constructor / destructors */
 189 static void aweather_gui_init(AWeatherGui *gui)
 190 {
 191         //g_message("aweather_gui_init");
 192 }
 193
 194 static GObject *aweather_gui_constructor(GType gtype, guint n_properties,
 195                 GObjectConstructParam *properties)
 196 {
 197         //g_message("aweather_gui_constructor");
 198         GObjectClass *parent_class = G_OBJECT_CLASS(aweather_gui_parent_class);
 199         return  parent_class->constructor(gtype, n_properties, properties);
 200 }
 201
 202 static void aweather_gui_dispose (GObject *gobject)
 203 {
 204         //g_message("aweather_gui_dispose");
 205         AWeatherGui *gui = AWEATHER_GUI(gobject);
 206         g_object_unref(gui->view   );
 207         g_object_unref(gui->builder);
 208         g_object_unref(gui->window );
 209         g_object_unref(gui->tabs   );
 210         g_object_unref(gui->drawing);
 211         G_OBJECT_CLASS(aweather_gui_parent_class)->dispose(gobject);
 212 }
 213
 214 static void aweather_gui_finalize(GObject *gobject)
 215 {
 216         //g_message("aweather_gui_finalize");
 217         G_OBJECT_CLASS(aweather_gui_parent_class)->finalize(gobject);
 218 }
 219
 220 static void aweather_gui_class_init(AWeatherGuiClass *klass)
 221 {
 222         //g_message("aweather_gui_class_init");
 223         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 224         gobject_class->constructor  = aweather_gui_constructor;
 225         gobject_class->dispose      = aweather_gui_dispose;
 226         gobject_class->finalize     = aweather_gui_finalize;
 227 }
 228
 229 /* Methods */
 230 AWeatherGui *aweather_gui_new()
 231 {
 232         //g_message("aweather_gui_new");
 233         GError *error = NULL;
 234
 235         AWeatherGui *gui = g_object_new(AWEATHER_TYPE_GUI, NULL);
 236
 237         gui->builder = gtk_builder_new();
 238         if (!gtk_builder_add_from_file(gui->builder, DATADIR "/aweather/aweather.xml", &error))
 239                 g_error("Failed to create gtk builder: %s", error->message);
 240         gui->view    = aweather_view_new();
 241         gui->window  = GTK_WINDOW      (gtk_builder_get_object(gui->builder, "window"));
 242         gui->tabs    = GTK_NOTEBOOK    (gtk_builder_get_object(gui->builder, "tabs"));
 243         gui->drawing = GTK_DRAWING_AREA(gtk_builder_get_object(gui->builder, "drawing"));
 244         gtk_builder_connect_signals(gui->builder, NULL);
 245
 246         /* Load components */
 247         site_setup(gui);
 248         time_setup(gui);
 249         opengl_setup(gui);
 250         return gui;
 251 }
 252 AWeatherView *aweather_gui_get_view(AWeatherGui *gui)
 253 {
 254         g_assert(AWEATHER_IS_GUI(gui));
 255         return gui->view;
 256 }
 257 GtkBuilder *aweather_gui_get_builder(AWeatherGui *gui)
 258 {
 259         g_assert(AWEATHER_IS_GUI(gui));
 260         return gui->builder;
 261 }
 262 GtkWindow *aweather_gui_get_window(AWeatherGui *gui)
 263 {
 264         g_assert(AWEATHER_IS_GUI(gui));
 265         return gui->window;
 266 }
 267 GtkNotebook *aweather_gui_get_tabs(AWeatherGui *gui)
 268 {
 269         g_assert(AWEATHER_IS_GUI(gui));
 270         return gui->tabs;
 271 }
 272 GtkDrawingArea *aweather_gui_get_drawing(AWeatherGui *gui)
 273 {
 274         g_assert(AWEATHER_IS_GUI(gui));
 275         return gui->drawing;
 276 }
 277 void aweather_gui_gl_begin(AWeatherGui *gui)
 278 {
 279         g_assert(AWEATHER_IS_GUI(gui));
 280
 281         GtkDrawingArea *drawing    = aweather_gui_get_drawing(gui);
 282         GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(drawing));
 283         GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(drawing));
 284
 285         if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
 286                 g_assert_not_reached();
 287
 288         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 289 }
 290 void aweather_gui_gl_end(AWeatherGui *gui)
 291 {
 292         g_assert(AWEATHER_IS_GUI(gui));
 293         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 294         gdk_gl_drawable_gl_end(gldrawable);
 295 }
 296 void aweather_gui_gl_flush(AWeatherGui *gui)
 297 {
 298         g_assert(AWEATHER_IS_GUI(gui));
 299         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 300         if (gdk_gl_drawable_is_double_buffered(gldrawable))
 301                 gdk_gl_drawable_swap_buffers(gldrawable);
 302         else
 303                 glFlush();
 304         gdk_gl_drawable_gl_end(gldrawable);
 305 }
 306 //void aweather_gui_register_plugin(AWeatherGui *gui, AWeatherPlugin *plugin);