vcs.maemo.org Git - eyes-widget/blob - src/eyes.c

   1 /* $Id: eyes.c 2397 2007-01-17 17:46:35Z nick $
   2  *
   3  * Copyright (c) Benedikt Meurer <benedikt.meurer@unix-ag.uni-siegen.de>>
   4  * Copyright (c) Danny Milosavljevic <danny_milo@gmx.net>
   5  * Copyright (c) Dave Camp
   6  * Copyright (c) Davyd Madeley  <davyd@madeley.id.au>
   7  * Copyright (c) Nick Schermer <nick@xfce.org>
   8  * Copyright (c) Mikko Vartiainen <mvartiainen@gmail.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by the Free
  12  * Software Foundation; either version 2 of the License, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful, but WITHOUT
  16  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18  * more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along with
  21  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  22  * Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #ifdef HAVE_MATH_H
  30 #include <math.h>
  31 #endif
  32
  33 #include <sys/types.h>
  34 #include <dirent.h>
  35 #include <string.h>
  36
  37 #include <libhildondesktop/libhildondesktop.h>
  38 #include <mce/dbus-names.h>
  39 #include <mce/mode-names.h>
  40
  41 #include "eyes.h"
  42 #include "themes.h"
  43 #include "accelerometer.h"
  44
  45 /* for xml: */
  46 #define EYES_ROOT      "Eyes"
  47 #define DEFAULTTHEME   "Default"
  48 #define UPDATE_TIMEOUT 100
  49
  50 #define EYES_PLUGIN_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE (obj, \
  51                                                                    EYES_TYPE_HOME_PLUGIN, \
  52                                                                    EyesPluginContent))
  53
  54 HD_DEFINE_PLUGIN_MODULE (EyesPlugin, eyes_plugin,      HD_TYPE_HOME_PLUGIN_ITEM)
  55
  56 static void eyes_check_display(DBusGProxy *object, const char *status, EyesPluginContent *eyes);
  57
  58 /*****************************
  59  *** Eyes Plugin Functions ***
  60  *****************************/
  61 static void
  62 calculate_pupil_xy (EyesPluginContent *eyes_applet,
  63                     gint x, gint y,
  64                     gint *pupil_x, gint *pupil_y, GtkWidget* widget)
  65 {
  66   double sina;
  67   double cosa;
  68   double h;
  69   double temp;
  70   double nx, ny;
  71
  72   gfloat xalign, yalign;
  73   gint width, height;
  74
  75   width = GTK_WIDGET(widget)->allocation.width;
  76   height = GTK_WIDGET(widget)->allocation.height;
  77   gtk_misc_get_alignment(GTK_MISC(widget),  &xalign, &yalign);
  78
  79   nx = width*x/1000.0;
  80   ny = height*y/1000.0;
  81
  82   h = hypot (nx, ny);
  83
  84   sina = nx / h;
  85   cosa = ny / h;
  86
  87   temp = hypot ((eyes_applet->eye_width / 2) * sina, (eyes_applet->eye_height / 2) * cosa);
  88   temp -= hypot ((eyes_applet->pupil_width / 2) * sina, (eyes_applet->pupil_height / 2) * cosa);
  89   temp -= hypot ((eyes_applet->wall_thickness / 2) * sina, (eyes_applet->wall_thickness / 2) * cosa);
  90
  91   if ( hypot(temp*sina, temp*cosa) > hypot( nx , ny ) )
  92     {
  93       *pupil_x = nx + eyes_applet->eye_width / 2;
  94       *pupil_y = ny + eyes_applet->eye_height / 2;
  95     }
  96   else
  97     {
  98       *pupil_x = temp * sina + (eyes_applet->eye_width / 2);
  99       *pupil_y = temp * cosa + (eyes_applet->eye_height / 2);
 100     }
 101 }
 102
 103 static void
 104 draw_eye (EyesPluginContent *eyes,
 105           gint    eye_num,
 106           gint    pupil_x,
 107           gint    pupil_y)
 108 {
 109   GdkPixbuf *pixbuf;
 110   GdkRectangle rect, r1, r2;
 111
 112   pixbuf = gdk_pixbuf_copy (eyes->eye_image);
 113   r1.x = pupil_x - eyes->pupil_width / 2;
 114   r1.y = pupil_y - eyes->pupil_height / 2;
 115   r1.width = eyes->pupil_width;
 116   r1.height = eyes->pupil_height;
 117   r2.x = 0;
 118   r2.y = 0;
 119   r2.width = eyes->eye_width;
 120   r2.height = eyes->eye_height;
 121   if (gdk_rectangle_intersect (&r1, &r2, &rect))
 122     {
 123       gdk_pixbuf_composite (eyes->pupil_image, pixbuf,
 124                             rect.x,
 125                             rect.y,
 126                             rect.width,
 127                             rect.height,
 128                             pupil_x - eyes->pupil_width / 2,
 129                             pupil_y - eyes->pupil_height / 2, 1.0, 1.0,
 130                             GDK_INTERP_BILINEAR,
 131                             255);
 132       gtk_image_set_from_pixbuf (GTK_IMAGE (eyes->eyes[eye_num]),
 133                                  pixbuf);
 134     }
 135   g_object_unref (G_OBJECT (pixbuf));
 136 }
 137
 138 static gint
 139 timer_cb(EyesPluginContent *eyes)
 140 {
 141   gint x, y, z;
 142   gint pupil_x, pupil_y;
 143   gint i;
 144
 145   for (i = 0; i < eyes->num_eyes; i++)
 146     {
 147       if (GTK_WIDGET_REALIZED(eyes->eyes[i]))
 148         {
 149           accel_read(&x, &y, &z);
 150           calculate_pupil_xy (eyes, -x, -y, &pupil_x, &pupil_y, eyes->eyes[i]);
 151
 152           if ((pupil_x != eyes->pointer_last_x[i]) || (pupil_y != eyes->pointer_last_y[i]))
 153             {
 154
 155               draw_eye (eyes, i, pupil_x, pupil_y);
 156
 157               eyes->pointer_last_x[i] = pupil_x;
 158               eyes->pointer_last_y[i] = pupil_y;
 159             }
 160         }
 161     }
 162
 163   return TRUE;
 164 }
 165
 166 static void
 167 properties_load(EyesPluginContent *eyes)
 168 {
 169   gchar *path;
 170
 171   if (eyes->active_theme)
 172     path = g_build_filename(THEMESDIR, eyes->active_theme, NULL);
 173   else
 174     path = g_build_filename(THEMESDIR, DEFAULTTHEME, NULL);
 175
 176   load_theme(eyes, path);
 177
 178   g_free(path);
 179 }
 180
 181
 182
 183 static void
 184 setup_eyes(EyesPluginContent *eyes)
 185 {
 186   g_warning ("setup_eyes");
 187   int i;
 188
 189   if (eyes->hbox != NULL)
 190     {
 191       gtk_widget_destroy(eyes->hbox);
 192       eyes->hbox = NULL;
 193     }
 194
 195   eyes->hbox = gtk_hbox_new(FALSE, 0);
 196   gtk_container_add(GTK_CONTAINER(eyes->align), GTK_WIDGET(eyes->hbox));
 197
 198   eyes->eyes = g_new0 (GtkWidget *, eyes->num_eyes);
 199   eyes->pointer_last_x = g_new0 (gint, eyes->num_eyes);
 200   eyes->pointer_last_y = g_new0 (gint, eyes->num_eyes);
 201
 202   for (i = 0; i < eyes->num_eyes; i++)
 203     {
 204       eyes->eyes[i] = gtk_image_new ();
 205
 206       gtk_widget_set_size_request(GTK_WIDGET(eyes->eyes[i]),
 207                                   eyes->eye_width,
 208                                   eyes->eye_height);
 209
 210       gtk_widget_show(eyes->eyes[i]);
 211
 212       gtk_box_pack_start(GTK_BOX(eyes->hbox), eyes->eyes[i],
 213                          FALSE, FALSE, 0);
 214
 215       if ((eyes->num_eyes != 1) && (i == 0))
 216         gtk_misc_set_alignment (GTK_MISC (eyes->eyes[i]), 1.0, 0.5);
 217       else if ((eyes->num_eyes != 1) && (i == eyes->num_eyes - 1))
 218         gtk_misc_set_alignment (GTK_MISC (eyes->eyes[i]), 0.0, 0.5);
 219       else
 220         gtk_misc_set_alignment (GTK_MISC (eyes->eyes[i]), 0.5, 0.5);
 221
 222       eyes->pointer_last_x[i] = G_MAXINT;
 223       eyes->pointer_last_y[i] = G_MAXINT;
 224
 225       draw_eye (eyes, i,
 226                 eyes->eye_width / 2,
 227                 eyes->eye_height / 2);
 228     }
 229
 230   gtk_widget_show(eyes->hbox);
 231 }
 232
 233
 234
 235 static gboolean
 236 eyes_applet_fill(EyesPluginContent *eyes)
 237 {
 238   gtk_widget_show_all(GTK_WIDGET(eyes->align));
 239
 240   if (eyes->timeout_id == 0)
 241     {
 242       eyes->timeout_id = g_timeout_add (UPDATE_TIMEOUT,
 243                                         (GtkFunction)timer_cb, eyes);
 244     }
 245
 246   return TRUE;
 247 }
 248
 249 /******************************
 250  *** Panel Plugin Functions ***
 251  ******************************/
 252 static void
 253 eyes_free_data(EyesPluginContent      *eyes)
 254 {
 255   g_warning("eyes_free_data");
 256   g_return_if_fail(eyes != NULL);
 257
 258   if (eyes->timeout_id != 0)
 259     g_source_remove (eyes->timeout_id);
 260
 261   g_free (eyes->eyes);
 262   g_free (eyes->pointer_last_x);
 263   g_free (eyes->pointer_last_y);
 264
 265   if (eyes->active_theme != NULL)
 266     g_free (eyes->active_theme);
 267
 268   if (eyes->eye_image != NULL)
 269     g_object_unref (G_OBJECT (eyes->eye_image));
 270
 271   if (eyes->pupil_image != NULL)
 272     g_object_unref (G_OBJECT (eyes->pupil_image));
 273
 274   if (eyes->theme_dir != NULL)
 275     g_free(eyes->theme_dir);
 276
 277   if (eyes->theme_name != NULL)
 278     g_free(eyes->theme_name);
 279
 280   if (eyes->eye_filename != NULL)
 281     g_free(eyes->eye_filename);
 282
 283   if (eyes->pupil_filename != NULL)
 284     g_free(eyes->pupil_filename);
 285
 286   if (eyes->proxy != NULL)
 287     dbus_g_proxy_disconnect_signal (eyes->proxy, MCE_DISPLAY_SIG, G_CALLBACK(eyes_check_display), eyes);
 288
 289   g_free(eyes);
 290 }
 291
 292 static void
 293 eyes_read_rc_file (EyesPluginContent      *eyes)
 294 {
 295   g_warning ("eyes_read_rc");
 296   if (eyes->active_theme == NULL)
 297     eyes->active_theme = g_strdup (DEFAULTTHEME);
 298 }
 299
 300 static EyesPluginContent *
 301 eyes_plugin_new ()
 302 {
 303   g_warning ("eyes_plugin_new");
 304   EyesPluginContent *eyes;
 305
 306   eyes = g_new0(EyesPluginContent, 1);
 307
 308   eyes->align = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
 309
 310   gtk_widget_show(GTK_WIDGET(eyes->align));
 311
 312   eyes_read_rc_file (eyes);
 313
 314   properties_load(eyes);
 315   setup_eyes(eyes);
 316   eyes_applet_fill(eyes);
 317
 318   eyes->visible = TRUE;
 319
 320   return eyes;
 321 }
 322
 323 static void
 324 eyes_check_desktop (GObject *gobject, GParamSpec *pspec, EyesPluginContent *eyes)
 325
 326 {
 327   g_warning ("eyes_check_desktop");
 328   gchar *name = pspec->name;
 329   gboolean status;
 330   g_object_get (gobject, name, &status, NULL);
 331   if (status) {
 332     eyes_applet_fill(eyes);
 333     eyes->visible = TRUE;
 334   } else if (eyes->timeout_id != 0) {
 335     g_source_remove (eyes->timeout_id);
 336     eyes->timeout_id = 0;
 337     eyes->visible = FALSE;
 338   }
 339 }
 340
 341 static void
 342 eyes_check_display(DBusGProxy *object, const char *status, EyesPluginContent *eyes)
 343 {
 344   if (strncmp(status, MCE_DISPLAY_ON_STRING,
 345               strlen(MCE_DISPLAY_ON_STRING) + 1) == 0
 346       && eyes-> visible)
 347     {
 348       eyes_applet_fill(eyes);
 349     }
 350   else if (strncmp(status, MCE_DISPLAY_OFF_STRING,
 351                    strlen(MCE_DISPLAY_OFF_STRING) + 1) == 0)
 352     {
 353       if (eyes->timeout_id != 0)
 354         {
 355           g_source_remove (eyes->timeout_id);
 356           eyes->timeout_id = 0;
 357         }
 358     }
 359
 360 }
 361
 362 static void
 363 eyes_plugin_dispose (GObject *object)
 364 {
 365   g_warning ("eyes_plugin_dispose");
 366
 367   G_OBJECT_CLASS (eyes_plugin_parent_class)->dispose (object);
 368 }
 369
 370 static void eyes_plugin_finalize (GObject *object)
 371 {
 372   g_warning ("eyes_plugin_finalize");
 373   EyesPlugin *self = EYES_HOME_PLUGIN (object);
 374
 375   eyes_free_data(self->priv);
 376
 377   G_OBJECT_CLASS (eyes_plugin_parent_class)->finalize (object);
 378 }
 379
 380 static void
 381 eyes_plugin_realize (GtkWidget *widget)
 382 {
 383   g_warning ("eyes_plugin_realize");
 384   GdkScreen *screen = gtk_widget_get_screen (widget);
 385   gtk_widget_set_colormap (widget, gdk_screen_get_rgba_colormap (screen));
 386   gtk_widget_set_app_paintable (widget, TRUE);
 387
 388   GTK_WIDGET_CLASS (eyes_plugin_parent_class)->realize (widget);
 389 }
 390
 391 static gboolean
 392 eyes_plugin_expose_event (GtkWidget *widget, GdkEventExpose *event)
 393 {
 394   g_warning ("eyes_plugin_expose_event");
 395   cairo_t *cr;
 396
 397   cr = gdk_cairo_create (GDK_DRAWABLE (widget->window));
 398   gdk_cairo_region (cr, event->region);
 399   cairo_clip (cr);
 400
 401   cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
 402   cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.0);
 403   cairo_paint (cr);
 404
 405   cairo_destroy (cr);
 406
 407   return GTK_WIDGET_CLASS (eyes_plugin_parent_class)->expose_event (widget, event);
 408 }
 409
 410 static void
 411 eyes_plugin_init (EyesPlugin *desktop_plugin)
 412 {
 413   g_warning ("eyes_plugin_init");
 414   EyesPluginContent *eyes;
 415
 416   eyes = eyes_plugin_new (desktop_plugin);
 417   desktop_plugin->priv = eyes;
 418
 419   g_signal_connect (desktop_plugin, "notify::is-on-current-desktop",
 420                     G_CALLBACK (eyes_check_desktop), eyes);
 421
 422   eyes->dbus_conn = NULL;
 423   eyes->proxy = NULL;
 424
 425   eyes->dbus_conn = hd_home_plugin_item_get_dbus_g_connection ( &desktop_plugin->hitem, DBUS_BUS_SYSTEM, NULL );
 426   if (eyes->dbus_conn != NULL)
 427     {
 428       eyes->proxy = dbus_g_proxy_new_for_name(eyes->dbus_conn, MCE_SERVICE, MCE_SIGNAL_PATH, MCE_SIGNAL_IF);
 429       dbus_g_proxy_add_signal (eyes->proxy, MCE_DISPLAY_SIG, G_TYPE_STRING, G_TYPE_INVALID );
 430       dbus_g_proxy_connect_signal(eyes->proxy, MCE_DISPLAY_SIG, G_CALLBACK(eyes_check_display),eyes,NULL);
 431     }
 432
 433   gtk_container_add (GTK_CONTAINER (desktop_plugin), eyes->align);
 434 }
 435
 436 static void
 437 eyes_plugin_class_init (EyesPluginClass *klass) {
 438   g_warning ("eyes_plugin_class_init");
 439   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 440   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 441
 442   object_class->dispose = eyes_plugin_dispose;
 443   object_class->finalize = eyes_plugin_finalize;
 444
 445   widget_class->realize = eyes_plugin_realize;
 446   widget_class->expose_event = eyes_plugin_expose_event;
 447   g_type_class_add_private (klass, sizeof (EyesPluginContent));
 448 }
 449
 450 static void
 451 eyes_plugin_class_finalize (EyesPluginClass *class) {}
 452