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
  19 #include <math.h>
  20 #include <location/location-gps-device.h>
  21 #include <location/location-gpsd-control.h>
  22 #include <gconf/gconf-client.h>
  23
  24 #include "util.h"
  25 #include "appdata.h"
  26 #include "callbacks.h"
  27 #include "ui.h"
  28
  29
  30 gdouble unit_array[] = {3.6};
  31
  32 #define GCONF_KEY "/apps/Maemo/speedometer/disclaimer"
  33
  34 static LocationGPSDevice *device = NULL;
  35 static LocationGPSDControl *control = NULL;
  36
  37 void start_gps(AppData* appdata) {
  38 #ifdef __arm__
  39         g_assert(appdata);
  40         if(!device) {
  41                 device = g_object_new(LOCATION_TYPE_GPS_DEVICE, NULL);
  42                 g_signal_connect(device, "changed", G_CALLBACK(location_changed), appdata);
  43         }
  44         control = location_gpsd_control_get_default();
  45         location_gpsd_control_request_status(control);
  46         if(control->can_control) {
  47                 location_gpsd_control_start(control);
  48         }
  49 #endif // __arm__
  50 }
  51
  52 void stop_gps(AppData* appdata) {
  53 #ifdef __arm__
  54         g_assert(appdata);
  55         control = location_gpsd_control_get_default();
  56         location_gpsd_control_request_status(control);
  57         if(control->can_control) {
  58                 location_gpsd_control_stop(control);
  59         }
  60 #endif // __arm__
  61 }
  62
  63 void interpret_speed_from_gps(AppData* appdata, gdouble speed) {
  64         g_assert(appdata);
  65         g_assert(!isnan(speed));
  66
  67         // convert float to a 6 digits (including dot) wide string with leading zeros
  68         gchar* charspeed = g_malloc(10); // alloc
  69         g_sprintf(charspeed, "%0*.2f", 6, speed);
  70
  71         g_print("Speed is %s km/h\n", charspeed);
  72
  73         // set the main digits
  74         guint i = 3;
  75         while(i) {
  76                 i--;
  77                 set_nth_digit(appdata, i, g_ascii_digit_value(charspeed[i]));
  78         }
  79
  80         repaint_all_digits(appdata);
  81
  82         g_free(charspeed);
  83 }
  84
  85
  86 static show_dialog() {
  87         GtkWidget *dialog = gtk_message_dialog_new(
  88                         NULL,
  89                         GTK_DIALOG_MODAL,
  90                         GTK_MESSAGE_INFO,
  91                         GTK_BUTTONS_OK,
  92                         "This program is licensed under GNU General Public License, "
  93                         "which means (among other things) that you don't have to pay "
  94                         "a dime for it. "
  95                         "If you think, however, that this software is worth it, you "
  96                         "can always drop me a postcard. (or a speeding ticket :)\n\n"
  97                         "Wellu Mäkinen\n"
  98                         "PO BOX\n"
  99                         "33580 Tampere\n"
 100                         "FINLAND");
 101         gtk_dialog_run(GTK_DIALOG(dialog));
 102         gtk_widget_destroy(dialog);
 103 }
 104
 105 void show_cardware_dialog() {
 106         GConfClient* client = gconf_client_get_default();
 107         g_assert(GCONF_IS_CLIENT(client));
 108
 109         GConfValue* gcvalue = NULL;
 110         gcvalue = gconf_client_get_without_default(client, GCONF_KEY, NULL);
 111
 112         if(gcvalue == NULL) {
 113                 g_print("GConf key not found so show dialog.");
 114                 show_dialog();
 115                 gconf_client_set_bool(client, GCONF_KEY, TRUE, NULL);
 116         }
 117         g_object_unref(client);
 118 }
 119