git.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 <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
  62         // if speed is below one then it's zero
  63         if(speed < 1) {
  64                 set_nth_digit(appdata, 0, 0);
  65                 set_nth_digit(appdata, 1, 0);
  66                 set_nth_digit(appdata, 2, 0);
  67                 return;
  68         }
  69
  70         // speed => 1
  71         // first let's convert the number to string
  72         gchar* cspeed = g_malloc(30); // alloc
  73         g_sprintf(cspeed, "%f", speed);
  74
  75         // split the string using comma as delimiter
  76         gchar** splitted = g_strsplit(cspeed, ",", 2); // alloc
  77
  78         gchar* ckm = splitted[0]; // contains the km/h part e.g 123 assuming speed was 123,034510
  79         gchar* cm = splitted[1]; // contains the m/h part e.g 034510 assuming speed was 123,034510
  80
  81         g_print("Original speed %c, splitted speed %c and %c\n", cspeed, ckm, cm);
  82
  83         // we need to pad km part in order to ensure it is *atleast* 3 digits long
  84         gchar* padding = "00";
  85         gchar* padded = g_strconcat(padding, cm, NULL); // alloc
  86
  87         g_print("Original speed %c, padded speed %c (km) and %c (m)\n", cspeed, padded, cm);
  88
  89
  90         guint i = 2;
  91         guint pspeedl = strlen(padded);
  92
  93         while(i+1) {
  94                 guint value = g_ascii_digit_value(padded[pspeedl]);
  95                 set_nth_digit(appdata, i, value);
  96                 i--;
  97         }
  98         repaint_all_digits(appdata);
  99
 100         g_free(padded);
 101         g_free(cspeed);
 102         g_strfreev(splitted);
 103 }
 104
 105 static show_dialog() {
 106         GtkWidget *dialog = gtk_message_dialog_new(
 107                         NULL,
 108                         GTK_DIALOG_MODAL,
 109                         GTK_MESSAGE_INFO,
 110                         GTK_BUTTONS_OK,
 111                         "This program is licensed under GNU General Public License, "
 112                         "which means (among other things) that you don't have to pay "
 113                         "a dime for it. "
 114                         "If you think, however, that this software is worth it, you "
 115                         "can always drop me a postcard.\n\n"
 116                         "Wellu Mäkinen\n"
 117                         "PO BOX\n"
 118                         "33580 Tampere\n"
 119                         "FINLAND");
 120         gtk_dialog_run(GTK_DIALOG(dialog));
 121         gtk_widget_destroy(dialog);
 122 }
 123
 124 void show_cardware_dialog() {
 125         GConfClient* client = gconf_client_get_default();
 126         g_assert(GCONF_IS_CLIENT(client));
 127
 128         GConfValue* gcvalue = NULL;
 129         gcvalue = gconf_client_get_without_default(client, GCONF_KEY, NULL);
 130
 131         if(gcvalue == NULL) {
 132                 g_print("GConf key not found so show dialog.");
 133                 show_dialog();
 134                 gconf_client_set_bool(client, GCONF_KEY, TRUE, NULL);
 135         }
 136         g_object_unref(client);
 137 }
 138