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   if ( nx*nx/((eyes_applet->eye_width/2.0 - eyes_applet->pupil_width / 2)*(eyes_applet->eye_width/2.0 - eyes_applet->pupil_width/2)) + ny*ny/((eyes_applet->eye_height/2 - eyes_applet->pupil_height/2)*(eyes_applet->eye_height/2 - eyes_applet->pupil_height/2)) < 1 )
  85     {
  86       *pupil_x = nx + eyes_applet->eye_width / 2;
  87       *pupil_y = ny + eyes_applet->eye_height / 2;
  88       return;
  89     }
  90
  91   sina = nx / h;
  92   cosa = ny / h;
  93
  94   temp = hypot ((eyes_applet->eye_width / 2) * sina, (eyes_applet->eye_height / 2) * cosa);
  95   temp -= hypot ((eyes_applet->pupil_width / 2) * sina, (eyes_applet->pupil_height / 2) * cosa);
  96   temp -= hypot ((eyes_applet->wall_thickness / 2) * sina, (eyes_applet->wall_thickness / 2) * cosa);
  97
  98   *pupil_x = temp * sina + (eyes_applet->eye_width / 2);
  99   *pupil_y = temp * cosa + (eyes_applet->eye_height / 2);
 100 }
 101
 102 static void
 103 draw_eye (EyesPluginContent *eyes,
 104           gint    eye_num,
 105           gint    pupil_x,
 106           gint    pupil_y)
 107 {
 108   GdkPixbuf *pixbuf;
 109   GdkRectangle rect, r1, r2;
 110
 111   pixbuf = gdk_pixbuf_copy (eyes->eye_image);
 112   r1.x = pupil_x - eyes->pupil_width / 2;
 113   r1.y = pupil_y - eyes->pupil_height / 2;
 114   r1.width = eyes->pupil_width;
 115   r1.height = eyes->pupil_height;
 116   r2.x = 0;
 117   r2.y = 0;
 118   r2.width = eyes->eye_width;
 119   r2.height = eyes->eye_height;
 120   if (gdk_rectangle_intersect (&r1, &r2, &rect))
 121     {
 122       gdk_pixbuf_composite (eyes->pupil_image, pixbuf,
 123                             rect.x,
 124                             rect.y,
 125                             rect.width,
 126                             rect.height,
 127                             pupil_x - eyes->pupil_width / 2,
 128                             pupil_y - eyes->pupil_height / 2, 1.0, 1.0,
 129                             GDK_INTERP_BILINEAR,
 130                             255);
 131       gtk_image_set_from_pixbuf (GTK_IMAGE (eyes->eyes[eye_num]),
 132                                  pixbuf);
 133     }
 134   g_object_unref (G_OBJECT (pixbuf));
 135 }
 136
 137 static gint
 138 timer_cb(EyesPluginContent *eyes)
 139 {
 140   gint x, y, z;
 141   gint pupil_x, pupil_y;
 142   gint i;
 143
 144   for (i = 0; i < eyes->num_eyes; i++)
 145     {
 146       if (GTK_WIDGET_REALIZED(eyes->eyes[i]))
 147         {
 148           accel_read(&x, &y, &z);
 149           calculate_pupil_xy (eyes, -x, -y, &pupil_x, &pupil_y, eyes->eyes[i]);
 150
 151           if ((pupil_x != eyes->pointer_last_x[i]) || (pupil_y != eyes->pointer_last_y[i]))
 152             {
 153
 154               draw_eye (eyes, i, pupil_x, pupil_y);
 155
 156               eyes->pointer_last_x[i] = pupil_x;
 157               eyes->pointer_last_y[i] = pupil_y;
 158             }
 159         }
 160     }
 161
 162   return TRUE;
 163 }
 164
 165 static void
 166 properties_load(EyesPluginContent *eyes)
 167 {
 168   gchar *path;
 169
 170   if (eyes->active_theme)
 171     path = g_build_filename(THEMESDIR, eyes->active_theme, NULL);
 172   else
 173     path = g_build_filename(THEMESDIR, DEFAULTTHEME, NULL);
 174
 175   load_theme(eyes, path);
 176
 177   g_free(path);
 178 }
 179
 180
 181
 182 static void
 183 setup_eyes(EyesPluginContent *eyes)
 184 {
 185   g_warning ("setup_eyes");
 186   int i;
 187
 188   if (eyes->hbox != NULL)
 189     {
 190       gtk_widget_destroy(eyes->hbox);
 191       eyes->hbox = NULL;
 192     }
 193
 194   eyes->hbox = gtk_hbox_new(FALSE, 0);
 195   gtk_container_add(GTK_CONTAINER(eyes->align), GTK_WIDGET(eyes->hbox));
 196
 197   eyes->eyes = g_new0 (GtkWidget *, eyes->num_eyes);
 198   eyes->pointer_last_x = g_new0 (gint, eyes->num_eyes);
 199   eyes->pointer_last_y = g_new0 (gint, eyes->num_eyes);
 200
 201   for (i = 0; i < eyes->num_eyes; i++)
 202     {
 203       eyes->eyes[i] = gtk_image_new ();
 204
 205       gtk_widget_set_size_request(GTK_WIDGET(eyes->eyes[i]),
 206                                   eyes->eye_width,
 207                                   eyes->eye_height);
 208
 209       gtk_widget_show(eyes->eyes[i]);
 210
 211       gtk_box_pack_start(GTK_BOX(eyes->hbox), eyes->eyes[i],
 212                          FALSE, FALSE, 0);
 213
 214       if ((eyes->num_eyes != 1) && (i == 0))
 215         gtk_misc_set_alignment (GTK_MISC (eyes->eyes[i]), 1.0, 0.5);
 216       else if ((eyes->num_eyes != 1) && (i == eyes->num_eyes - 1))
 217         gtk_misc_set_alignment (GTK_MISC (eyes->eyes[i]), 0.0, 0.5);
 218       else
 219         gtk_misc_set_alignment (GTK_MISC (eyes->eyes[i]), 0.5, 0.5);
 220
 221       eyes->pointer_last_x[i] = G_MAXINT;
 222       eyes->pointer_last_y[i] = G_MAXINT;
 223
 224       draw_eye (eyes, i,
 225                 eyes->eye_width / 2,
 226                 eyes->eye_height / 2);
 227     }
 228
 229   gtk_widget_show(eyes->hbox);
 230 }
 231
 232
 233
 234 static gboolean
 235 eyes_applet_fill(EyesPluginContent *eyes)
 236 {
 237   gtk_widget_show_all(GTK_WIDGET(eyes->align));
 238
 239   if (eyes->timeout_id == 0)
 240     {
 241       eyes->timeout_id = g_timeout_add (UPDATE_TIMEOUT,
 242                                         (GtkFunction)timer_cb, eyes);
 243     }
 244
 245   return TRUE;
 246 }
 247
 248 /******************************
 249  *** Panel Plugin Functions ***
 250  ******************************/
 251 static void
 252 eyes_free_data(EyesPluginContent      *eyes)
 253 {
 254   g_warning("eyes_free_data");
 255   g_return_if_fail(eyes != NULL);
 256
 257   if (eyes->timeout_id != 0)
 258     g_source_remove (eyes->timeout_id);
 259
 260   g_free (eyes->eyes);
 261   g_free (eyes->pointer_last_x);
 262   g_free (eyes->pointer_last_y);
 263
 264   if (eyes->active_theme != NULL)
 265     g_free (eyes->active_theme);
 266
 267   if (eyes->eye_image != NULL)
 268     g_object_unref (G_OBJECT (eyes->eye_image));
 269
 270   if (eyes->pupil_image != NULL)
 271     g_object_unref (G_OBJECT (eyes->pupil_image));
 272
 273   if (eyes->theme_dir != NULL)
 274     g_free(eyes->theme_dir);
 275
 276   if (eyes->theme_name != NULL)
 277     g_free(eyes->theme_name);
 278
 279   if (eyes->eye_filename != NULL)
 280     g_free(eyes->eye_filename);
 281
 282   if (eyes->pupil_filename != NULL)
 283     g_free(eyes->pupil_filename);
 284
 285   if (eyes->proxy != NULL)
 286     dbus_g_proxy_disconnect_signal (eyes->proxy, MCE_DISPLAY_SIG, G_CALLBACK(eyes_check_display), eyes);
 287
 288   g_free(eyes);
 289 }
 290
 291 static void
 292 eyes_read_rc_file (EyesPluginContent      *eyes)
 293 {
 294   g_warning ("eyes_read_rc");
 295   if (eyes->active_theme == NULL)
 296     eyes->active_theme = g_strdup (DEFAULTTHEME);
 297 }
 298
 299 static EyesPluginContent *
 300 eyes_plugin_new ()
 301 {
 302   g_warning ("eyes_plugin_new");
 303   EyesPluginContent *eyes;
 304
 305   eyes = g_new0(EyesPluginContent, 1);
 306
 307   eyes->align = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
 308
 309   gtk_widget_show(GTK_WIDGET(eyes->align));
 310
 311   eyes_read_rc_file (eyes);
 312
 313   properties_load(eyes);
 314   setup_eyes(eyes);
 315   eyes_applet_fill(eyes);
 316
 317   eyes->visible = TRUE;
 318
 319   return eyes;
 320 }
 321
 322 static void
 323 eyes_check_desktop (GObject *gobject, GParamSpec *pspec, EyesPluginContent *eyes)
 324
 325 {
 326   g_warning ("eyes_check_desktop");
 327   gchar *name = pspec->name;
 328   gboolean status;
 329   g_object_get (gobject, name, &status, NULL);
 330   if (status) {
 331     eyes_applet_fill(eyes);
 332     eyes->visible = TRUE;
 333   } else if (eyes->timeout_id != 0) {
 334     g_source_remove (eyes->timeout_id);
 335     eyes->timeout_id = 0;
 336     eyes->visible = FALSE;
 337   }
 338 }
 339
 340 static void
 341 eyes_check_display(DBusGProxy *object, const char *status, EyesPluginContent *eyes)
 342 {
 343   if (strncmp(status, MCE_DISPLAY_ON_STRING,
 344               strlen(MCE_DISPLAY_ON_STRING) + 1) == 0
 345       && eyes-> visible)
 346     {
 347       eyes_applet_fill(eyes);
 348     }
 349   else if (strncmp(status, MCE_DISPLAY_OFF_STRING,
 350                    strlen(MCE_DISPLAY_OFF_STRING) + 1) == 0)
 351     {
 352       if (eyes->timeout_id != 0)
 353         {
 354           g_source_remove (eyes->timeout_id);
 355           eyes->timeout_id = 0;
 356         }
 357     }
 358
 359 }
 360
 361 static void
 362 eyes_plugin_dispose (GObject *object)
 363 {
 364   g_warning ("eyes_plugin_dispose");
 365
 366   G_OBJECT_CLASS (eyes_plugin_parent_class)->dispose (object);
 367 }
 368
 369 static void eyes_plugin_finalize (GObject *object)
 370 {
 371   g_warning ("eyes_plugin_finalize");
 372   EyesPlugin *self = EYES_HOME_PLUGIN (object);
 373
 374   eyes_free_data(self->priv);
 375
 376   G_OBJECT_CLASS (eyes_plugin_parent_class)->finalize (object);
 377 }
 378
 379 static void
 380 eyes_plugin_realize (GtkWidget *widget)
 381 {
 382   g_warning ("eyes_plugin_realize");
 383   GdkScreen *screen = gtk_widget_get_screen (widget);
 384   gtk_widget_set_colormap (widget, gdk_screen_get_rgba_colormap (screen));
 385   gtk_widget_set_app_paintable (widget, TRUE);
 386
 387   GTK_WIDGET_CLASS (eyes_plugin_parent_class)->realize (widget);
 388 }
 389
 390 static gboolean
 391 eyes_plugin_expose_event (GtkWidget *widget, GdkEventExpose *event)
 392 {
 393   g_warning ("eyes_plugin_expose_event");
 394   cairo_t *cr;
 395
 396   cr = gdk_cairo_create (GDK_DRAWABLE (widget->window));
 397   gdk_cairo_region (cr, event->region);
 398   cairo_clip (cr);
 399
 400   cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
 401   cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.0);
 402   cairo_paint (cr);
 403
 404   cairo_destroy (cr);
 405
 406   return GTK_WIDGET_CLASS (eyes_plugin_parent_class)->expose_event (widget, event);
 407 }
 408
 409 static void
 410 eyes_plugin_init (EyesPlugin *desktop_plugin)
 411 {
 412   g_warning ("eyes_plugin_init");
 413   EyesPluginContent *eyes;
 414
 415   eyes = eyes_plugin_new (desktop_plugin);
 416   desktop_plugin->priv = eyes;
 417
 418   g_signal_connect (desktop_plugin, "notify::is-on-current-desktop",
 419                     G_CALLBACK (eyes_check_desktop), eyes);
 420
 421   eyes->dbus_conn = NULL;
 422   eyes->proxy = NULL;
 423
 424   eyes->dbus_conn = hd_home_plugin_item_get_dbus_g_connection ( &desktop_plugin->hitem, DBUS_BUS_SYSTEM, NULL );
 425   if (eyes->dbus_conn != NULL)
 426     {
 427       eyes->proxy = dbus_g_proxy_new_for_name(eyes->dbus_conn, MCE_SERVICE, MCE_SIGNAL_PATH, MCE_SIGNAL_IF);
 428       dbus_g_proxy_add_signal (eyes->proxy, MCE_DISPLAY_SIG, G_TYPE_STRING, G_TYPE_INVALID );
 429       dbus_g_proxy_connect_signal(eyes->proxy, MCE_DISPLAY_SIG, G_CALLBACK(eyes_check_display),eyes,NULL);
 430     }
 431
 432   gtk_container_add (GTK_CONTAINER (desktop_plugin), eyes->align);
 433 }
 434
 435 static void
 436 eyes_plugin_class_init (EyesPluginClass *klass) {
 437   g_warning ("eyes_plugin_class_init");
 438   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 439   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 440
 441   object_class->dispose = eyes_plugin_dispose;
 442   object_class->finalize = eyes_plugin_finalize;
 443
 444   widget_class->realize = eyes_plugin_realize;
 445   widget_class->expose_event = eyes_plugin_expose_event;
 446   g_type_class_add_private (klass, sizeof (EyesPluginContent));
 447 }
 448
 449 static void
 450 eyes_plugin_class_finalize (EyesPluginClass *class) {}
 451