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), 3000);
  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                         flashlight_close (priv->flashlight);
  88                         return;
  89                 }
  90
  91                 if (flashlight_set_intensity (priv->flashlight, 1) < 0) {
  92                         flashlight_status_plugin_show_notification (plugin,
  93                                 _("Unable to turn on flashlight."));
  94                         flashlight_close (priv->flashlight);
  95                         return;
  96                 }
  97
  98                 hildon_button_set_value (HILDON_BUTTON (priv->button), MSG_FLASHLIGHT_ON);
  99                 hildon_button_set_image (HILDON_BUTTON (priv->button),
 100                                          gtk_image_new_from_icon_name (ICON_FLASHLIGHT_ON, -1));
 101
 102                 /* check status of controller every 1s */
 103                 priv->status_timer = g_timeout_add (1000, flashlight_status_plugin_status, plugin);
 104         } else {
 105                 /* cancel status timer */
 106                 if (priv->status_timer) {
 107                         g_source_remove (priv->status_timer);
 108                         priv->status_timer = 0;
 109                 }
 110
 111                 /* set intensity to 0 */
 112                 if (flashlight_set_intensity (priv->flashlight, 0) < 0) {
 113                         flashlight_status_plugin_show_notification (plugin,
 114                                 _("Unable to turn off flashlight."));
 115                         return;
 116                 }
 117
 118                 if (flashlight_close (priv->flashlight) < 0) {
 119                         return;
 120                 }
 121
 122                 hildon_button_set_value (HILDON_BUTTON (priv->button), MSG_FLASHLIGHT_OFF);
 123                 hildon_button_set_image (HILDON_BUTTON (priv->button),
 124                                          gtk_image_new_from_icon_name (ICON_FLASHLIGHT_OFF, -1));
 125         }
 126 }
 127
 128 static void
 129 flashlight_status_plugin_on_hal_property_modified (LibHalContext *ctx,
 130                                                    const char *udi,
 131                                                    const char *key,
 132                                                    dbus_bool_t is_removed,
 133                                                    dbus_bool_t is_added)
 134 {
 135         FlashlightPlugin *plugin = libhal_ctx_get_user_data (ctx);
 136         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 137         gboolean is_open;
 138         int intensity = 0;
 139
 140         g_return_if_fail (priv);
 141
 142         if (strcmp (udi, CAM_COVER_UDI) != 0)
 143                 return;
 144
 145         if (strcmp (key, CAM_COVER_STATE) != 0)
 146                 return;
 147
 148         is_open = !libhal_device_get_property_bool (ctx, udi, key, NULL);
 149
 150         if (is_open) {
 151                 /* show widget */
 152                 gtk_widget_show_all (GTK_WIDGET (plugin));
 153         } else {
 154                 /* turn off flashlight if flashlight is enabled */
 155                 if (flashlight_get_intensity (priv->flashlight, &intensity) == 0) {
 156                         if (intensity > 0) {
 157                                 flashlight_status_plugin_enable (plugin, FALSE);
 158                         }
 159                 }
 160
 161                 /* hide widget */
 162                 gtk_widget_hide_all (GTK_WIDGET (plugin));
 163         }
 164 }
 165
 166 static gboolean
 167 flashlight_status_plugin_status (gpointer data)
 168 {
 169         FlashlightPlugin *plugin = data;
 170         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 171         int status = 0;
 172
 173         if (flashlight_get_status (priv->flashlight, &status) < 0) {
 174                 flashlight_status_plugin_show_notification (plugin,
 175                                                             _("Unable to read status from driver."));
 176                 return FALSE;
 177         }
 178
 179         /* ops, something is wrong */
 180         if (status) {
 181                 /* turn off flashlight */
 182                 flashlight_status_plugin_enable (plugin, FALSE);
 183
 184                 if (status & FLASHLIGHT_STATUS_SHORT_CIRCUT_FAULT) {
 185                         flashlight_status_plugin_show_notification (plugin,
 186                                 _("Short-circut fault detected!\nTurning off flashlight."));
 187                 } else if (status & FLASHLIGHT_STATUS_OVERTEMPERATURE_FAULT) {
 188                         flashlight_status_plugin_show_notification (plugin,
 189                                 _("Overtemperature fault detected!\nTurning off flashlight."));
 190                 } else if (status & FLASHLIGHT_STATUS_TIMEOUT_FAULT) {
 191                         flashlight_status_plugin_show_notification (plugin,
 192                                 _("Timeout fault detected!\nTurning off flashlight."));
 193                 } else if (status & FLASHLIGHT_STATUS_OVERVOLTAGE_FAULT) {
 194                         flashlight_status_plugin_show_notification (plugin,
 195                                 _("Overvoltage fault detected!\nTurning off flashlight."));
 196                 }
 197         }
 198
 199         return TRUE;
 200 }
 201
 202 static void
 203 flashlight_status_plugin_on_clicked (HildonButton *button,
 204                                      gpointer data)
 205 {
 206         FlashlightPlugin *plugin = data;
 207         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 208
 209         g_return_if_fail (priv);
 210
 211         if (!strcmp (hildon_button_get_value (button), MSG_FLASHLIGHT_ON)) {
 212                 flashlight_status_plugin_enable (plugin, FALSE);
 213         } else {
 214                 flashlight_status_plugin_enable (plugin, TRUE);
 215         }
 216 }
 217
 218 static GtkWidget *
 219 flashlight_status_plugin_ui (FlashlightPlugin *plugin)
 220 {
 221         GtkWidget *button;
 222
 223         g_return_val_if_fail (plugin, NULL);
 224
 225         button = hildon_button_new (HILDON_SIZE_FINGER_HEIGHT, HILDON_BUTTON_ARRANGEMENT_VERTICAL);
 226         gtk_button_set_alignment (GTK_BUTTON (button), 0.0, 0.5);
 227         hildon_button_set_title (HILDON_BUTTON (button), _("Flashlight"));
 228         hildon_button_set_value (HILDON_BUTTON (button), MSG_FLASHLIGHT_OFF);
 229         hildon_button_set_image (HILDON_BUTTON (button),
 230                                  gtk_image_new_from_icon_name (ICON_FLASHLIGHT_OFF, -1));
 231         hildon_button_set_image_position (HILDON_BUTTON (button), GTK_POS_LEFT);
 232
 233         g_signal_connect (button, "clicked",
 234                                         G_CALLBACK (flashlight_status_plugin_on_clicked), plugin);
 235
 236         return button;
 237 }
 238
 239 static void
 240 flashlight_status_plugin_class_init (FlashlightPluginClass *class)
 241 {
 242         GObjectClass *object_class = G_OBJECT_CLASS (class);
 243
 244         object_class->finalize = flashlight_status_plugin_finalize;
 245
 246         g_type_class_add_private (class, sizeof (FlashlightPluginPrivate));
 247 }
 248
 249 static void
 250 flashlight_status_plugin_class_finalize (FlashlightPluginClass *class)
 251 {
 252 }
 253
 254 static void
 255 flashlight_status_plugin_init (FlashlightPlugin *plugin)
 256 {
 257         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 258         DBusConnection *dbus_connection;
 259         DBusError error;
 260
 261         /* initialize dbus */
 262         dbus_error_init (&error);
 263         dbus_connection = dbus_bus_get (DBUS_BUS_SYSTEM, &error);
 264         if (dbus_error_is_set (&error)) {
 265                 g_critical ("flashlight_status_plugin_init: Could not get the system DBus connection, %s",
 266                             error.message);
 267                 dbus_error_free (&error);
 268                 return;
 269         }
 270
 271         /* initialize flashlight */
 272         if (flashlight_init (&priv->flashlight) < 0) {
 273                 g_critical ("flashlight_status_plugin_init: Unable to create Flashlight context\n");
 274                 return;
 275         }
 276
 277         /* initialize hal */
 278         priv->hal = libhal_ctx_new ();
 279         if (!priv->hal) {
 280                 g_critical ("flashlight_status_plugin_init: Unable to create HAL context\n");
 281                 return;
 282         }
 283
 284         libhal_ctx_set_dbus_connection (priv->hal, dbus_connection);
 285         libhal_ctx_set_user_data (priv->hal, plugin);
 286         libhal_ctx_set_device_property_modified (priv->hal,
 287                                                  flashlight_status_plugin_on_hal_property_modified);
 288
 289         if (!libhal_ctx_init (priv->hal, &error)) {
 290                 if (dbus_error_is_set (&error)) {
 291                         g_critical ("Could not initialize the HAL context, %s",
 292                                     error.message);
 293                         dbus_error_free (&error);
 294                 } else {
 295                         g_critical ("Could not initialize the HAL context, "
 296                                     "no error, is hald running?");
 297                 }
 298                 libhal_ctx_set_user_data (priv->hal, NULL);
 299                 libhal_ctx_free (priv->hal);
 300                 return;
 301         }
 302
 303         libhal_device_add_property_watch (priv->hal, CAM_COVER_UDI, NULL);
 304
 305         /* create plugin ui */
 306         priv->button = flashlight_status_plugin_ui (plugin);
 307         gtk_container_add (GTK_CONTAINER (plugin), priv->button);
 308
 309         /* show widget if camera cover is open */
 310         if ( !libhal_device_get_property_bool (priv->hal, CAM_COVER_UDI, CAM_COVER_STATE, NULL))
 311                 gtk_widget_show_all (GTK_WIDGET (plugin));
 312
 313 }
 314
 315 static void
 316 flashlight_status_plugin_finalize (GObject *object)
 317 {
 318         FlashlightPlugin *plugin = FLASHLIGHT_STATUS_PLUGIN (object);
 319         FlashlightPluginPrivate *priv = FLASHLIGHT_STATUS_PLUGIN_GET_PRIVATE (plugin);
 320
 321         g_return_if_fail (priv);
 322
 323         /* deinitialize hal */
 324         if (priv->hal) {
 325                 libhal_device_remove_property_watch (priv->hal, CAM_COVER_UDI, NULL);
 326                 libhal_ctx_set_user_data (priv->hal, NULL);
 327                 libhal_ctx_free (priv->hal);
 328         }
 329
 330         /* cancel status timer */
 331         if (priv->status_timer) {
 332                 g_source_remove (priv->status_timer);
 333         }
 334
 335         /* deinitialize flashlight */
 336         if (priv->flashlight) {
 337                 flashlight_deinit (priv->flashlight);
 338         }
 339
 340         G_OBJECT_CLASS (flashlight_status_plugin_parent_class)->finalize (object);
 341 }