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

   1 /*
   2  *  Flashlight applet (widget) for Maemo.
   3  *  Copyright (C) 2009 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         LibHalContext *hal;
  55 };
  56
  57 HD_DEFINE_PLUGIN_MODULE (FlashlightPlugin, flashlight_status_plugin, HD_TYPE_STATUS_MENU_ITEM)
  58
  59 static gboolean flashlight_status_plugin_status (gpointer data);
  60 static void flashlight_status_plugin_finalize (GObject *object);
  61
  62 static void
  63 flashlight_status_plugin_show_notification (FlashlightPlugin *plugin,
  64                                             const gchar *text)
  65 {
  66         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
  67         GtkWidget *banner;
  68
  69         g_return_if_fail (priv);
  70
  71         banner = hildon_banner_show_information (GTK_WIDGET (priv->button), NULL, text);
  72         hildon_banner_set_timeout (HILDON_BANNER (banner), 9000);
  73 }
  74
  75 static void
  76 flashlight_status_plugin_enable (FlashlightPlugin *plugin,
  77                                  gboolean enable)
  78 {
  79         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
  80
  81         g_return_if_fail (priv);
  82
  83         if (enable) {
  84                 if (flashlight_open (priv->flashlight, "/dev/video0") < 0) {
  85                         flashlight_status_plugin_show_notification (plugin,
  86                                 _("Unable to initialize flashlight.\nCamera in use by another application."));
  87                         return;
  88                 }
  89
  90                 if (flashlight_set_intensity (priv->flashlight, 1) < 0) {
  91                         flashlight_status_plugin_show_notification (plugin,
  92                                 _("Unable to turn on flashlight."));
  93                         return;
  94                 }
  95
  96                 hildon_button_set_value (HILDON_BUTTON (priv->button), MSG_FLASHLIGHT_ON);
  97                 hildon_button_set_image (HILDON_BUTTON (priv->button),
  98                                          gtk_image_new_from_icon_name (ICON_FLASHLIGHT_ON, -1));
  99
 100                 /* check status of controller every 1s */
 101                 priv->status_timer = g_timeout_add (1000, flashlight_status_plugin_status, plugin);
 102         } else {
 103                 /* cancel status timer */
 104                 if (priv->status_timer) {
 105                         g_source_remove (priv->status_timer);
 106                         priv->status_timer = 0;
 107                 }
 108
 109                 /* set intensity to 0 */
 110                 if (flashlight_set_intensity (priv->flashlight, 0) < 0) {
 111                         flashlight_status_plugin_show_notification (plugin,
 112                                 _("Unable to turn off flashlight."));
 113                         return;
 114                 }
 115
 116                 if (flashlight_close (priv->flashlight) < 0) {
 117                         return;
 118                 }
 119
 120                 hildon_button_set_value (HILDON_BUTTON (priv->button), MSG_FLASHLIGHT_OFF);
 121                 hildon_button_set_image (HILDON_BUTTON (priv->button),
 122                                          gtk_image_new_from_icon_name (ICON_FLASHLIGHT_OFF, -1));
 123         }
 124 }
 125
 126 static void
 127 flashlight_status_plugin_on_hal_property_modified (LibHalContext *ctx,
 128                                                    const char *udi,
 129                                                    const char *key,
 130                                                    dbus_bool_t is_removed,
 131                                                    dbus_bool_t is_added)
 132 {
 133         FlashlightPlugin *plugin = libhal_ctx_get_user_data (ctx);
 134         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 135         gboolean is_open;
 136         int intensity = 0;
 137
 138         g_return_if_fail (priv);
 139
 140         if (strcmp (udi, CAM_COVER_UDI) != 0)
 141                 return;
 142
 143         if (strcmp (key, CAM_COVER_STATE) != 0)
 144                 return;
 145
 146         is_open = !libhal_device_get_property_bool (ctx, udi, key, NULL);
 147
 148         if (is_open) {
 149                 /* show widget */
 150                 gtk_widget_show_all (GTK_WIDGET (plugin));
 151         } else {
 152                 /* turn off flashlight if flashlight is enabled */
 153                 if (flashlight_get_intensity (priv->flashlight, &intensity) == 0) {
 154                         if (intensity > 0) {
 155                                 flashlight_status_plugin_enable (plugin, FALSE);
 156                         }
 157                 }
 158
 159                 /* hide widget */
 160                 gtk_widget_hide_all (GTK_WIDGET (plugin));
 161         }
 162 }
 163
 164 static gboolean
 165 flashlight_status_plugin_status (gpointer data)
 166 {
 167         FlashlightPlugin *plugin = data;
 168         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 169         int status = 0;
 170
 171         if (flashlight_get_status (priv->flashlight, &status) < 0) {
 172                 flashlight_status_plugin_show_notification (plugin,
 173                                                             _("Unable to read status from driver."));
 174                 return FALSE;
 175         }
 176
 177         /* ops, something is wrong */
 178         if (status) {
 179                 /* turn off flashlight */
 180                 flashlight_status_plugin_enable (plugin, FALSE);
 181
 182                 if (status & FLASHLIGHT_STATUS_SHORT_CIRCUT_FAULT) {
 183                         flashlight_status_plugin_show_notification (plugin,
 184                                 _("Short-circut fault detected!\nTurning off flashlight."));
 185                 } else if (status & FLASHLIGHT_STATUS_OVERTEMPERATURE_FAULT) {
 186                         flashlight_status_plugin_show_notification (plugin,
 187                                 _("Overtemperature fault detected!\nTurning off flashlight."));
 188                 } else if (status & FLASHLIGHT_STATUS_TIMEOUT_FAULT) {
 189                         flashlight_status_plugin_show_notification (plugin,
 190                                 _("Timeout fault detected!\nTurning off flashlight."));
 191                 } else if (status & FLASHLIGHT_STATUS_OVERVOLTAGE_FAULT) {
 192                         flashlight_status_plugin_show_notification (plugin,
 193                                 _("Overvoltage fault detected!\nTurning off flashlight."));
 194                 }
 195         }
 196
 197         return TRUE;
 198 }
 199
 200 static void
 201 flashlight_status_plugin_on_clicked (HildonButton *button,
 202                                      gpointer data)
 203 {
 204         FlashlightPlugin *plugin = data;
 205         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 206
 207         g_return_if_fail (priv);
 208
 209         if (!strcmp (hildon_button_get_value (button), MSG_FLASHLIGHT_ON)) {
 210                 flashlight_status_plugin_enable (plugin, FALSE);
 211         } else {
 212                 flashlight_status_plugin_enable (plugin, TRUE);
 213         }
 214 }
 215
 216 static GtkWidget *
 217 flashlight_status_plugin_ui (FlashlightPlugin *plugin)
 218 {
 219         GtkWidget *button;
 220
 221         button = hildon_button_new (HILDON_SIZE_FINGER_HEIGHT, HILDON_BUTTON_ARRANGEMENT_VERTICAL);
 222         gtk_button_set_alignment (GTK_BUTTON (button), 0.0, 0.5);
 223         hildon_button_set_title (HILDON_BUTTON (button), _("Flashlight"));
 224         hildon_button_set_value (HILDON_BUTTON (button), MSG_FLASHLIGHT_OFF);
 225         hildon_button_set_image (HILDON_BUTTON (button),
 226                                  gtk_image_new_from_icon_name (ICON_FLASHLIGHT_OFF, -1));
 227         hildon_button_set_image_position (HILDON_BUTTON (button), GTK_POS_LEFT);
 228
 229         g_signal_connect (button, "clicked",
 230                                         G_CALLBACK (flashlight_status_plugin_on_clicked), plugin);
 231
 232         return button;
 233 }
 234
 235 static void
 236 flashlight_status_plugin_class_init (FlashlightPluginClass *class)
 237 {
 238         GObjectClass *object_class = G_OBJECT_CLASS (class);
 239
 240         object_class->finalize = flashlight_status_plugin_finalize;
 241
 242         g_type_class_add_private (class, sizeof (FlashlightPluginPrivate));
 243 }
 244
 245 static void
 246 flashlight_status_plugin_class_finalize (FlashlightPluginClass *class)
 247 {
 248 }
 249
 250 static void
 251 flashlight_status_plugin_init (FlashlightPlugin *plugin)
 252 {
 253         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 254         DBusConnection *dbus_connection;
 255         DBusError error;
 256
 257         /* initialize dbus */
 258         dbus_error_init (&error);
 259         dbus_connection = dbus_bus_get (DBUS_BUS_SYSTEM, &error);
 260         if (dbus_error_is_set (&error)) {
 261                 g_critical ("flashlight_status_plugin_init: Could not get the system DBus connection, %s",
 262                             error.message);
 263                 dbus_error_free (&error);
 264                 return;
 265         }
 266
 267         /* initialize flashlight */
 268         if (flashlight_init (&priv->flashlight) < 0) {
 269                 g_critical ("flashlight_status_plugin_init: Unable to create Flashlight context\n");
 270                 return;
 271         }
 272
 273         /* initialize hal */
 274         priv->hal = libhal_ctx_new ();
 275         if (!priv->hal) {
 276                 g_critical ("flashlight_status_plugin_init: Unable to create HAL context\n");
 277                 return;
 278         }
 279
 280         libhal_ctx_set_dbus_connection (priv->hal, dbus_connection);
 281         libhal_ctx_set_user_data (priv->hal, plugin);
 282         libhal_ctx_set_device_property_modified (priv->hal,
 283                                                  flashlight_status_plugin_on_hal_property_modified);
 284
 285         if (!libhal_ctx_init (priv->hal, &error)) {
 286                 if (dbus_error_is_set (&error)) {
 287                         g_critical ("Could not initialize the HAL context, %s",
 288                                     error.message);
 289                         dbus_error_free (&error);
 290                 } else {
 291                         g_critical ("Could not initialize the HAL context, "
 292                                     "no error, is hald running?");
 293                 }
 294                 libhal_ctx_set_user_data (priv->hal, NULL);
 295                 libhal_ctx_free (priv->hal);
 296         }
 297
 298         libhal_device_add_property_watch (priv->hal, CAM_COVER_UDI, NULL);
 299
 300         /* create plugin ui */
 301         priv->button = flashlight_status_plugin_ui (plugin);
 302         gtk_container_add (GTK_CONTAINER (plugin), priv->button);
 303
 304         /* show widget if camera cover is open */
 305         if ( !libhal_device_get_property_bool (priv->hal, CAM_COVER_UDI, CAM_COVER_STATE, NULL))
 306                 gtk_widget_show_all (GTK_WIDGET (plugin));
 307
 308 }
 309
 310 static void
 311 flashlight_status_plugin_finalize (GObject *object)
 312 {
 313         FlashlightPlugin *plugin = FLASHLIGHT_STATUS_PLUGIN (object);
 314         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 315
 316         /* deinitialize hal */
 317         if (priv->hal) {
 318                 libhal_device_remove_property_watch (priv->hal, CAM_COVER_UDI, NULL);
 319                 libhal_ctx_set_user_data (priv->hal, NULL);
 320                 libhal_ctx_free (priv->hal);
 321         }
 322
 323         /* cancel status timer */
 324         if (priv->status_timer) {
 325                 g_source_remove (priv->status_timer);
 326         }
 327
 328         /* deinitialize flashlight */
 329         if (priv->flashlight) {
 330                 flashlight_deinit (priv->flashlight);
 331         }
 332
 333         G_OBJECT_CLASS (flashlight_status_plugin_parent_class)->finalize (object);
 334 }