vcs.maemo.org Git - flashlight-appl/blob - src/flashlight_applet.c

   1 /*
   2  *  Flashlight applet (widget) for Maemo.
   3  *  Copyright (C) 2009, 2010 Roman Moravcik
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <glib.h>
  27 #include <gtk/gtk.h>
  28 #include <hildon/hildon.h>
  29 #include <glib/gi18n-lib.h>
  30 #include <libhal.h>
  31 #include <dbus/dbus.h>
  32
  33 #include "flashlight_applet.h"
  34 #include "flashlight_lib.h"
  35
  36 #define MSG_FLASHLIGHT_ON _("On")
  37 #define MSG_FLASHLIGHT_OFF _("Off")
  38
  39 #define ICON_FLASHLIGHT_ON "statusarea_flashlight_on"
  40 #define ICON_FLASHLIGHT_OFF "statusarea_flashlight_off"
  41
  42 #define CAM_COVER_UDI "/org/freedesktop/Hal/devices/platform_cam_shutter"
  43 #define CAM_COVER_STATE "button.state.value"
  44
  45 #define FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE (obj,   \
  46                             TYPE_FLASHLIGHT_STATUS_PLUGIN, FlashlightPluginPrivate))
  47
  48 struct _FlashlightPluginPrivate
  49 {
  50         GtkWidget *button;
  51         guint status_timer;
  52
  53         FlashlightContext_t *flashlight;
  54         DBusConnection *dbus_connection;
  55         LibHalContext *hal;
  56 };
  57
  58 HD_DEFINE_PLUGIN_MODULE (FlashlightPlugin, flashlight_status_plugin, HD_TYPE_STATUS_MENU_ITEM)
  59
  60 static gboolean flashlight_status_plugin_status (gpointer data);
  61 static void flashlight_status_plugin_finalize (GObject *object);
  62
  63 static void
  64 flashlight_status_plugin_show_notification (FlashlightPlugin *plugin,
  65                                             const gchar *text)
  66 {
  67         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
  68         GtkWidget *banner;
  69
  70         g_return_if_fail (priv);
  71
  72         banner = hildon_banner_show_information (GTK_WIDGET (priv->button), NULL, text);
  73         hildon_banner_set_timeout (HILDON_BANNER (banner), 3000);
  74 }
  75
  76 static void
  77 flashlight_status_plugin_enable (FlashlightPlugin *plugin,
  78                                  gboolean enable)
  79 {
  80         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
  81
  82         g_return_if_fail (priv);
  83
  84         if (enable) {
  85                 if (flashlight_open (priv->flashlight, "/dev/video0") < 0) {
  86                         flashlight_status_plugin_show_notification (plugin,
  87                                 _("Unable to initialize flashlight.\nCamera in use by another application."));
  88                         flashlight_close (priv->flashlight);
  89                         return;
  90                 }
  91
  92                 if (flashlight_set_intensity (priv->flashlight, 1) < 0) {
  93                         flashlight_status_plugin_show_notification (plugin,
  94                                 _("Unable to turn on flashlight."));
  95                         flashlight_close (priv->flashlight);
  96                         return;
  97                 }
  98
  99                 hildon_button_set_value (HILDON_BUTTON (priv->button), MSG_FLASHLIGHT_ON);
 100                 hildon_button_set_image (HILDON_BUTTON (priv->button),
 101                                          gtk_image_new_from_icon_name (ICON_FLASHLIGHT_ON, -1));
 102
 103                 /* check status of controller every 1s */
 104                 priv->status_timer = g_timeout_add (1000, flashlight_status_plugin_status, plugin);
 105         } else {
 106                 /* cancel status timer */
 107                 if (priv->status_timer) {
 108                         g_source_remove (priv->status_timer);
 109                         priv->status_timer = 0;
 110                 }
 111
 112                 /* set intensity to 0 */
 113                 if (flashlight_set_intensity (priv->flashlight, 0) < 0) {
 114                         flashlight_status_plugin_show_notification (plugin,
 115                                 _("Unable to turn off flashlight."));
 116                         return;
 117                 }
 118
 119                 if (flashlight_close (priv->flashlight) < 0) {
 120                         return;
 121                 }
 122
 123                 hildon_button_set_value (HILDON_BUTTON (priv->button), MSG_FLASHLIGHT_OFF);
 124                 hildon_button_set_image (HILDON_BUTTON (priv->button),
 125                                          gtk_image_new_from_icon_name (ICON_FLASHLIGHT_OFF, -1));
 126         }
 127 }
 128
 129 static void
 130 flashlight_status_plugin_on_hal_property_modified (LibHalContext *ctx,
 131                                                    const char *udi,
 132                                                    const char *key,
 133                                                    dbus_bool_t is_removed,
 134                                                    dbus_bool_t is_added)
 135 {
 136         FlashlightPlugin *plugin = libhal_ctx_get_user_data (ctx);
 137         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 138         gboolean is_open;
 139         int intensity = 0;
 140
 141         g_return_if_fail (priv);
 142
 143         if (strcmp (udi, CAM_COVER_UDI) != 0)
 144                 return;
 145
 146         if (strcmp (key, CAM_COVER_STATE) != 0)
 147                 return;
 148
 149         is_open = !libhal_device_get_property_bool (ctx, udi, key, NULL);
 150
 151         if (is_open) {
 152                 /* show widget */
 153                 gtk_widget_show_all (GTK_WIDGET (plugin));
 154         } else {
 155                 /* turn off flashlight if flashlight is enabled */
 156                 if (flashlight_get_intensity (priv->flashlight, &intensity) == 0) {
 157                         if (intensity > 0) {
 158                                 flashlight_status_plugin_enable (plugin, FALSE);
 159                         }
 160                 }
 161
 162                 /* hide widget */
 163                 gtk_widget_hide_all (GTK_WIDGET (plugin));
 164         }
 165 }
 166
 167 static gboolean
 168 flashlight_status_plugin_status (gpointer data)
 169 {
 170         FlashlightPlugin *plugin = data;
 171         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 172         int status = 0;
 173
 174         if (flashlight_get_status (priv->flashlight, &status) < 0) {
 175                 flashlight_status_plugin_show_notification (plugin,
 176                                                             _("Unable to read status from driver."));
 177                 return FALSE;
 178         }
 179
 180         /* ops, something is wrong */
 181         if (status) {
 182                 /* turn off flashlight */
 183                 flashlight_status_plugin_enable (plugin, FALSE);
 184
 185                 if (status & FLASHLIGHT_STATUS_SHORT_CIRCUT_FAULT) {
 186                         flashlight_status_plugin_show_notification (plugin,
 187                                 _("Short-circut fault detected!\nTurning off flashlight."));
 188                 } else if (status & FLASHLIGHT_STATUS_OVERTEMPERATURE_FAULT) {
 189                         flashlight_status_plugin_show_notification (plugin,
 190                                 _("Overtemperature fault detected!\nTurning off flashlight."));
 191                 } else if (status & FLASHLIGHT_STATUS_TIMEOUT_FAULT) {
 192                         flashlight_status_plugin_show_notification (plugin,
 193                                 _("Timeout fault detected!\nTurning off flashlight."));
 194                 } else if (status & FLASHLIGHT_STATUS_OVERVOLTAGE_FAULT) {
 195                         flashlight_status_plugin_show_notification (plugin,
 196                                 _("Overvoltage fault detected!\nTurning off flashlight."));
 197                 }
 198         }
 199
 200         return TRUE;
 201 }
 202
 203 static void
 204 flashlight_status_plugin_on_clicked (HildonButton *button,
 205                                      gpointer data)
 206 {
 207         FlashlightPlugin *plugin = data;
 208         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 209
 210         g_return_if_fail (priv);
 211
 212         if (!strcmp (hildon_button_get_value (button), MSG_FLASHLIGHT_ON)) {
 213                 flashlight_status_plugin_enable (plugin, FALSE);
 214         } else {
 215                 flashlight_status_plugin_enable (plugin, TRUE);
 216         }
 217 }
 218
 219 static GtkWidget *
 220 flashlight_status_plugin_ui (FlashlightPlugin *plugin)
 221 {
 222         GtkWidget *button;
 223
 224         g_return_val_if_fail (plugin, NULL);
 225
 226         button = hildon_button_new (HILDON_SIZE_FINGER_HEIGHT, HILDON_BUTTON_ARRANGEMENT_VERTICAL);
 227         gtk_button_set_alignment (GTK_BUTTON (button), 0.0, 0.5);
 228         hildon_button_set_title (HILDON_BUTTON (button), _("Flashlight"));
 229         hildon_button_set_value (HILDON_BUTTON (button), MSG_FLASHLIGHT_OFF);
 230         hildon_button_set_image (HILDON_BUTTON (button),
 231                                  gtk_image_new_from_icon_name (ICON_FLASHLIGHT_OFF, -1));
 232         hildon_button_set_image_position (HILDON_BUTTON (button), GTK_POS_LEFT);
 233
 234         g_signal_connect (button, "clicked",
 235                                         G_CALLBACK (flashlight_status_plugin_on_clicked), plugin);
 236
 237         return button;
 238 }
 239
 240 static void
 241 flashlight_status_plugin_class_init (FlashlightPluginClass *class)
 242 {
 243         GObjectClass *object_class = G_OBJECT_CLASS (class);
 244
 245         object_class->finalize = flashlight_status_plugin_finalize;
 246
 247         g_type_class_add_private (class, sizeof (FlashlightPluginPrivate));
 248 }
 249
 250 static void
 251 flashlight_status_plugin_class_finalize (FlashlightPluginClass *class)
 252 {
 253 }
 254
 255 static void
 256 flashlight_status_plugin_init (FlashlightPlugin *plugin)
 257 {
 258         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 259         DBusConnection *dbus_connection;
 260         DBusError error;
 261
 262         /* initialize dbus */
 263         dbus_error_init (&error);
 264         priv->dbus_connection = dbus_bus_get (DBUS_BUS_SYSTEM, &error);
 265         if (dbus_error_is_set (&error)) {
 266                 g_critical ("flashlight_status_plugin_init: Could not get the system DBus connection, %s",
 267                             error.message);
 268                 dbus_error_free (&error);
 269                 return;
 270         }
 271
 272         /* initialize flashlight */
 273         if (flashlight_init (&priv->flashlight) < 0) {
 274                 g_critical ("flashlight_status_plugin_init: Unable to create Flashlight context\n");
 275                 return;
 276         }
 277
 278         /* initialize hal */
 279         priv->hal = libhal_ctx_new ();
 280         if (!priv->hal) {
 281                 g_critical ("flashlight_status_plugin_init: Unable to create HAL context\n");
 282                 return;
 283         }
 284
 285         libhal_ctx_set_dbus_connection (priv->hal, priv->dbus_connection);
 286         libhal_ctx_set_user_data (priv->hal, plugin);
 287         libhal_ctx_set_device_property_modified (priv->hal,
 288                                                  flashlight_status_plugin_on_hal_property_modified);
 289
 290         if (!libhal_ctx_init (priv->hal, &error)) {
 291                 if (dbus_error_is_set (&error)) {
 292                         g_critical ("Could not initialize the HAL context, %s",
 293                                     error.message);
 294                         dbus_error_free (&error);
 295                 } else {
 296                         g_critical ("Could not initialize the HAL context, "
 297                                     "no error, is hald running?");
 298                 }
 299                 libhal_ctx_set_user_data (priv->hal, NULL);
 300                 libhal_ctx_free (priv->hal);
 301                 priv->hal = NULL;
 302                 return;
 303         }
 304
 305         libhal_device_add_property_watch (priv->hal, CAM_COVER_UDI, NULL);
 306
 307         /* create plugin ui */
 308         priv->button = flashlight_status_plugin_ui (plugin);
 309         gtk_container_add (GTK_CONTAINER (plugin), priv->button);
 310
 311         /* show widget if camera cover is open */
 312         if ( !libhal_device_get_property_bool (priv->hal, CAM_COVER_UDI, CAM_COVER_STATE, NULL))
 313                 gtk_widget_show_all (GTK_WIDGET (plugin));
 314
 315 }
 316
 317 static void
 318 flashlight_status_plugin_finalize (GObject *object)
 319 {
 320         FlashlightPlugin *plugin = FLASHLIGHT_STATUS_PLUGIN (object);
 321         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 322
 323         g_return_if_fail (priv);
 324
 325         /* deinitialize hal */
 326         if (priv->hal) {
 327                 libhal_device_remove_property_watch (priv->hal, CAM_COVER_UDI, NULL);
 328                 libhal_ctx_set_user_data (priv->hal, NULL);
 329                 libhal_ctx_shutdown (priv->hal, NULL);
 330                 libhal_ctx_free (priv->hal);
 331         }
 332         priv->hal = NULL;
 333
 334         /* unreference dbus connection */
 335         if (priv->dbus_connection) {
 336                 dbus_connection_unref (priv->dbus_connection);
 337         }
 338         priv->dbus_connection = NULL;
 339
 340         /* cancel status timer */
 341         if (priv->status_timer) {
 342                 g_source_remove (priv->status_timer);
 343         }
 344
 345         /* deinitialize flashlight */
 346         if (priv->flashlight) {
 347                 flashlight_deinit (priv->flashlight);
 348         }
 349
 350         G_OBJECT_CLASS (flashlight_status_plugin_parent_class)->finalize (object);
 351 }