git.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
  39 #include "eyes.h"
  40 #include "themes.h"
  41 #include "accelerometer.h"
  42
  43 /* for xml: */
  44 #define EYES_ROOT      "Eyes"
  45 #define DEFAULTTHEME   "Default"
  46 #define UPDATE_TIMEOUT 100
  47
  48 #define EYES_PLUGIN_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE (obj,\
  49                                                                                  EYES_TYPE_HOME_PLUGIN,\
  50                                                                                  EyesPluginContent))
  51
  52 HD_DEFINE_PLUGIN_MODULE (EyesPlugin, eyes_plugin,      HD_TYPE_HOME_PLUGIN_ITEM)
  53
  54 /*****************************
  55  *** Eyes Plugin Functions ***
  56  *****************************/
  57 static void
  58 calculate_pupil_xy (EyesPluginContent *eyes_applet,
  59                     gint x, gint y,
  60                     gint *pupil_x, gint *pupil_y, GtkWidget* widget)
  61 {
  62         double sina;
  63         double cosa;
  64         double h;
  65         double temp;
  66         double nx, ny;
  67
  68         gfloat xalign, yalign;
  69         gint width, height;
  70
  71         width = GTK_WIDGET(widget)->allocation.width;
  72         height = GTK_WIDGET(widget)->allocation.height;
  73         gtk_misc_get_alignment(GTK_MISC(widget),  &xalign, &yalign);
  74
  75     nx = width*x/1000.0;
  76     ny = height*y/1000.0;
  77
  78         h = hypot (nx, ny);
  79
  80     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 )
  81         {
  82                         *pupil_x = nx + eyes_applet->eye_width / 2;
  83                         *pupil_y = ny + eyes_applet->eye_height / 2;
  84                         return;
  85         }
  86
  87         sina = nx / h;
  88         cosa = ny / h;
  89
  90         temp = hypot ((eyes_applet->eye_width / 2) * sina, (eyes_applet->eye_height / 2) * cosa);
  91         temp -= hypot ((eyes_applet->pupil_width / 2) * sina, (eyes_applet->pupil_height / 2) * cosa);
  92         temp -= hypot ((eyes_applet->wall_thickness / 2) * sina, (eyes_applet->wall_thickness / 2) * cosa);
  93
  94         *pupil_x = temp * sina + (eyes_applet->eye_width / 2);
  95         *pupil_y = temp * cosa + (eyes_applet->eye_height / 2);
  96 }
  97
  98
  99
 100 static void
 101 draw_eye (EyesPluginContent *eyes,
 102           gint    eye_num,
 103           gint    pupil_x,
 104           gint    pupil_y)
 105 {
 106     GdkPixbuf *pixbuf;
 107     GdkRectangle rect, r1, r2;
 108
 109     pixbuf = gdk_pixbuf_copy (eyes->eye_image);
 110     r1.x = pupil_x - eyes->pupil_width / 2;
 111     r1.y = pupil_y - eyes->pupil_height / 2;
 112     r1.width = eyes->pupil_width;
 113     r1.height = eyes->pupil_height;
 114     r2.x = 0;
 115     r2.y = 0;
 116     r2.width = eyes->eye_width;
 117     r2.height = eyes->eye_height;
 118     if (gdk_rectangle_intersect (&r1, &r2, &rect))
 119     {
 120         gdk_pixbuf_composite (eyes->pupil_image, pixbuf,
 121                            rect.x,
 122                            rect.y,
 123                            rect.width,
 124                                  rect.height,
 125                                  pupil_x - eyes->pupil_width / 2,
 126                            pupil_y - eyes->pupil_height / 2, 1.0, 1.0,
 127                                  GDK_INTERP_BILINEAR,
 128                                255);
 129         gtk_image_set_from_pixbuf (GTK_IMAGE (eyes->eyes[eye_num]),
 130                               pixbuf);
 131     }
 132     g_object_unref (G_OBJECT (pixbuf));
 133 }
 134
 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             x = -x;
 150             y = -y;
 151
 152             if ((x != eyes->pointer_last_x[i]) || (y != eyes->pointer_last_y[i]))
 153             {
 154
 155                 calculate_pupil_xy (eyes, x, y, &pupil_x, &pupil_y, eyes->eyes[i]);
 156                 draw_eye (eyes, i, pupil_x, pupil_y);
 157
 158                 eyes->pointer_last_x[i] = x;
 159                 eyes->pointer_last_y[i] = y;
 160             }
 161         }
 162     }
 163
 164     return TRUE;
 165 }
 166
 167
 168
 169 static void
 170 properties_load(EyesPluginContent *eyes)
 171 {
 172     gchar *path;
 173
 174     if (eyes->active_theme)
 175         path = g_build_filename(THEMESDIR, eyes->active_theme, NULL);
 176     else
 177         path = g_build_filename(THEMESDIR, DEFAULTTHEME, NULL);
 178
 179     load_theme(eyes, path);
 180
 181     g_free(path);
 182 }
 183
 184
 185
 186 static void
 187 setup_eyes(EyesPluginContent *eyes)
 188 {
 189     g_warning ("setup_eyes");
 190     int i;
 191
 192     if (eyes->hbox != NULL)
 193     {
 194         gtk_widget_destroy(eyes->hbox);
 195         eyes->hbox = NULL;
 196     }
 197
 198     eyes->hbox = gtk_hbox_new(FALSE, 0);
 199     gtk_container_add(GTK_CONTAINER(eyes->align), GTK_WIDGET(eyes->hbox));
 200
 201     eyes->eyes = g_new0 (GtkWidget *, eyes->num_eyes);
 202         eyes->pointer_last_x = g_new0 (gint, eyes->num_eyes);
 203         eyes->pointer_last_y = g_new0 (gint, eyes->num_eyes);
 204
 205     for (i = 0; i < eyes->num_eyes; i++)
 206     {
 207         eyes->eyes[i] = gtk_image_new ();
 208
 209         gtk_widget_set_size_request(GTK_WIDGET(eyes->eyes[i]),
 210                                     eyes->eye_width,
 211                                     eyes->eye_height);
 212
 213         gtk_widget_show(eyes->eyes[i]);
 214
 215         gtk_box_pack_start(GTK_BOX(eyes->hbox), eyes->eyes[i],
 216                            FALSE, FALSE, 0);
 217
 218                 if ((eyes->num_eyes != 1) && (i == 0))
 219             gtk_misc_set_alignment (GTK_MISC (eyes->eyes[i]), 1.0, 0.5);
 220                 else if ((eyes->num_eyes != 1) && (i == eyes->num_eyes - 1))
 221                         gtk_misc_set_alignment (GTK_MISC (eyes->eyes[i]), 0.0, 0.5);
 222                 else
 223                         gtk_misc_set_alignment (GTK_MISC (eyes->eyes[i]), 0.5, 0.5);
 224
 225                 eyes->pointer_last_x[i] = G_MAXINT;
 226                 eyes->pointer_last_y[i] = G_MAXINT;
 227
 228                 draw_eye (eyes, i,
 229                               eyes->eye_width / 2,
 230                   eyes->eye_height / 2);
 231     }
 232
 233     gtk_widget_show(eyes->hbox);
 234 }
 235
 236
 237
 238 static gboolean
 239 eyes_applet_fill(EyesPluginContent *eyes)
 240 {
 241     gtk_widget_show_all(GTK_WIDGET(eyes->align));
 242
 243     if (eyes->timeout_id == 0)
 244     {
 245         eyes->timeout_id = g_timeout_add (UPDATE_TIMEOUT,
 246                                           (GtkFunction)timer_cb, eyes);
 247     }
 248
 249     return TRUE;
 250 }
 251
 252 /******************************
 253  *** Panel Plugin Functions ***
 254  ******************************/
 255 static void
 256 eyes_free_data(EyesPluginContent      *eyes)
 257 {
 258     g_warning("eyes_free_data");
 259     g_return_if_fail(eyes != NULL);
 260
 261     if (eyes->timeout_id != 0)
 262         g_source_remove (eyes->timeout_id);
 263
 264     g_free (eyes->eyes);
 265         g_free (eyes->pointer_last_x);
 266         g_free (eyes->pointer_last_y);
 267
 268         if (eyes->active_theme != NULL)
 269                 g_free (eyes->active_theme);
 270
 271     if (eyes->eye_image != NULL)
 272         g_object_unref (G_OBJECT (eyes->eye_image));
 273
 274     if (eyes->pupil_image != NULL)
 275         g_object_unref (G_OBJECT (eyes->pupil_image));
 276
 277     if (eyes->theme_dir != NULL)
 278         g_free(eyes->theme_dir);
 279
 280     if (eyes->theme_name != NULL)
 281         g_free(eyes->theme_name);
 282
 283     if (eyes->eye_filename != NULL)
 284         g_free(eyes->eye_filename);
 285
 286     if (eyes->pupil_filename != NULL)
 287         g_free(eyes->pupil_filename);
 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     return eyes;
 319 }
 320
 321 static void eyes_check_desktop (GObject *gobject, GParamSpec *pspec, EyesPluginContent *eyes)
 322 {
 323         g_warning ("eyes_check_desktop");
 324         gchar *name = pspec->name;
 325         gboolean status;
 326         g_object_get (gobject, name, &status, NULL);
 327         if (status) {
 328             eyes_applet_fill(eyes);
 329         } else if (eyes->timeout_id != 0) {
 330         g_source_remove (eyes->timeout_id);
 331                 eyes->timeout_id = 0;
 332         }
 333 }
 334
 335 static void eyes_plugin_dispose (GObject *object)
 336 {
 337         g_warning ("eyes_plugin_dispose");
 338
 339         G_OBJECT_CLASS (eyes_plugin_parent_class)->dispose (object);
 340 }
 341
 342 static void eyes_plugin_finalize (GObject *object)
 343 {
 344         g_warning ("eyes_plugin_finalize");
 345         EyesPlugin *self = EYES_HOME_PLUGIN (object);
 346
 347     eyes_free_data(self->priv);
 348
 349         G_OBJECT_CLASS (eyes_plugin_parent_class)->finalize (object);
 350 }
 351
 352 static void
 353 eyes_plugin_realize (GtkWidget *widget)
 354 {
 355     g_warning ("eyes_plugin_realize");
 356     GdkScreen *screen = gtk_widget_get_screen (widget);
 357     gtk_widget_set_colormap (widget, gdk_screen_get_rgba_colormap (screen));
 358     gtk_widget_set_app_paintable (widget, TRUE);
 359
 360     GTK_WIDGET_CLASS (eyes_plugin_parent_class)->realize (widget);
 361 }
 362
 363 static gboolean
 364 eyes_plugin_expose_event (GtkWidget *widget, GdkEventExpose *event)
 365 {
 366     g_warning ("eyes_plugin_expose_event");
 367     cairo_t *cr;
 368
 369     cr = gdk_cairo_create (GDK_DRAWABLE (widget->window));
 370     gdk_cairo_region (cr, event->region);
 371     cairo_clip (cr);
 372
 373     cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
 374     cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.0);
 375     cairo_paint (cr);
 376
 377     cairo_destroy (cr);
 378
 379     return GTK_WIDGET_CLASS (eyes_plugin_parent_class)->expose_event (widget, event);
 380 }
 381
 382 static void
 383 eyes_plugin_init (EyesPlugin *desktop_plugin)
 384 {
 385     g_warning ("eyes_plugin_init");
 386     EyesPluginContent *eyes;
 387
 388     eyes = eyes_plugin_new (desktop_plugin);
 389     desktop_plugin->priv = eyes;
 390
 391     g_signal_connect (desktop_plugin, "notify::is-on-current-desktop",
 392         G_CALLBACK (eyes_check_desktop), eyes);
 393
 394     gtk_container_add (GTK_CONTAINER (desktop_plugin), eyes->align);
 395 }
 396
 397 static void
 398 eyes_plugin_class_init (EyesPluginClass *klass) {
 399     g_warning ("eyes_plugin_class_init");
 400     GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 401     GObjectClass *object_class = G_OBJECT_CLASS (klass);
 402
 403         object_class->dispose = eyes_plugin_dispose;
 404         object_class->finalize = eyes_plugin_finalize;
 405
 406     widget_class->realize = eyes_plugin_realize;
 407     widget_class->expose_event = eyes_plugin_expose_event;
 408     g_type_class_add_private (klass, sizeof (EyesPluginContent));
 409 }
 410
 411 static void
 412 eyes_plugin_class_finalize (EyesPluginClass *class) {}
 413