vcs.maemo.org Git - speedometer/blob - util.c

   1 /****
   2         Speedometer, shows your current speed using GPS
   3         Copyright (C) 2008 Wellu Mäkinen <wellu@wellu.org>
   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 3 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, see <http://www.gnu.org/licenses/>.
  17  ****/
  18 #include <math.h>
  19 #include <location/location-gps-device.h>
  20 #include <location/location-gpsd-control.h>
  21 #include <gconf/gconf-client.h>
  22
  23 #include "util.h"
  24 #include "appdata.h"
  25 #include "callbacks.h"
  26 #include "ui.h"
  27
  28 #define GCONF_KEY "/apps/Maemo/speedometer/disclaimer"
  29
  30 static LocationGPSDevice *device = NULL;
  31 static LocationGPSDControl *control = NULL;
  32
  33 void start_gps(AppData* appdata) {
  34 #ifdef __arm__
  35         g_assert(appdata);
  36         if(!device) {
  37                 device = g_object_new(LOCATION_TYPE_GPS_DEVICE, NULL);
  38                 g_signal_connect(device, "changed", G_CALLBACK(location_changed), appdata);
  39         }
  40         control = location_gpsd_control_get_default();
  41         location_gpsd_control_request_status(control);
  42         if(control->can_control) {
  43                 location_gpsd_control_start(control);
  44         }
  45 #endif // __arm__
  46 }
  47
  48 void stop_gps(AppData* appdata) {
  49 #ifdef __arm__
  50         g_assert(appdata);
  51         control = location_gpsd_control_get_default();
  52         location_gpsd_control_request_status(control);
  53         if(control->can_control) {
  54                 location_gpsd_control_stop(control);
  55         }
  56 #endif // __arm__
  57 }
  58
  59 void interpret_speed_from_gps(AppData* appdata, gdouble speed) {
  60         g_assert(appdata);
  61         g_assert(!isnan(speed));
  62
  63         // convert float to a 6 digits (including dot) wide string with leading zeros
  64         gchar* charspeed = g_malloc(10); // alloc
  65         g_sprintf(charspeed, "%0*.2f", 6, speed);
  66
  67         g_print("Speed is %s km/h\n", charspeed);
  68
  69         guint i = 3;
  70         while(i) {
  71                 i--;
  72                 set_nth_digit(appdata, i, g_ascii_digit_value(charspeed[i]));
  73         }
  74         repaint_all_digits(appdata);
  75
  76         g_free(charspeed);
  77 }
  78
  79
  80 static show_dialog() {
  81         GtkWidget *dialog = gtk_message_dialog_new(
  82                         NULL,
  83                         GTK_DIALOG_MODAL,
  84                         GTK_MESSAGE_INFO,
  85                         GTK_BUTTONS_OK,
  86                         "This program is licensed under GNU General Public License, "
  87                         "which means (among other things) that you don't have to pay "
  88                         "a dime for it. "
  89                         "If you think, however, that this software is worth it, you "
  90                         "can always drop me a postcard.\n\n"
  91                         "Wellu Mäkinen\n"
  92                         "PO BOX\n"
  93                         "33580 Tampere\n"
  94                         "FINLAND");
  95         gtk_dialog_run(GTK_DIALOG(dialog));
  96         gtk_widget_destroy(dialog);
  97 }
  98
  99 void show_cardware_dialog() {
 100         GConfClient* client = gconf_client_get_default();
 101         g_assert(GCONF_IS_CLIENT(client));
 102
 103         GConfValue* gcvalue = NULL;
 104         gcvalue = gconf_client_get_without_default(client, GCONF_KEY, NULL);
 105
 106         if(gcvalue == NULL) {
 107                 g_print("GConf key not found so show dialog.");
 108                 show_dialog();
 109                 gconf_client_set_bool(client, GCONF_KEY, TRUE, NULL);
 110         }
 111         g_object_unref(client);
 112 }
 113