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 #include <glib/gprintf.h>
  24
  25 #include "util.h"
  26 #include "appdata.h"
  27 #include "callbacks.h"
  28 #include "ui.h"
  29
  30 /* This is used when converting to other units
  31  * number represents a multiplier which is used
  32  * when converting the base unit to other units.
  33  * Base unit is m/s thus the first multiplier is
  34  * one. Units are in following order:
  35  *
  36  * m/s, km/h, mph
  37  */
  38 gdouble conversion[] = { 1, 3.6, 2.237 };
  39
  40 #define GCONF_KEY "/apps/Maemo/speedometer/disclaimer"
  41
  42 static LocationGPSDevice *device = NULL;
  43 static LocationGPSDControl *control = NULL;
  44
  45 void start_gps(AppData* appdata) {
  46 #ifdef __arm__
  47         g_assert(appdata);
  48         if(!device) {
  49                 device = g_object_new(LOCATION_TYPE_GPS_DEVICE, NULL);
  50                 g_signal_connect(device, "changed", G_CALLBACK(location_changed), appdata);
  51         }
  52         control = location_gpsd_control_get_default();
  53         location_gpsd_control_request_status(control);
  54         if(control->can_control) {
  55                 location_gpsd_control_start(control);
  56         }
  57 #endif // __arm__
  58 }
  59
  60 void stop_gps(AppData* appdata) {
  61 #ifdef __arm__
  62         g_assert(appdata);
  63         control = location_gpsd_control_get_default();
  64         location_gpsd_control_request_status(control);
  65         if(control->can_control) {
  66                 location_gpsd_control_stop(control);
  67         }
  68 #endif // __arm__
  69 }
  70
  71 void interpret_speed_from_gps(AppData* appdata, gdouble speed) {
  72         g_assert(appdata);
  73         g_assert(!isnan(speed));
  74
  75         /* speed is in m/s so let's convert
  76          * it to the unit that we are using
  77          */
  78         speed *= conversion[appdata->unit];
  79
  80         // convert float to a 6 digits (including dot) wide string with leading zeros
  81         gchar* charspeed = g_malloc(10); // alloc
  82         g_sprintf(charspeed, "%0*.2f", 6, speed);
  83
  84         g_print("Speed is %s km/h\n", charspeed);
  85
  86         // set the main digits
  87         guint i = 3;
  88         while(i) {
  89                 i--;
  90                 set_nth_digit(appdata, i, g_ascii_digit_value(charspeed[i]));
  91         }
  92
  93         repaint_all_digits(appdata);
  94
  95         g_free(charspeed);
  96 }
  97
  98
  99 static void show_dialog() {
 100         GtkWidget *dialog = gtk_message_dialog_new(
 101                         NULL,
 102                         GTK_DIALOG_MODAL,
 103                         GTK_MESSAGE_INFO,
 104                         GTK_BUTTONS_OK,
 105                         "This program is licensed under GNU General Public License, "
 106                         "which means (among other things) that you don't have to pay "
 107                         "a dime for it. "
 108                         "If you think, however, that this software is worth it, you "
 109                         "can always drop me a postcard.\n\n"
 110                         "Wellu Mäkinen\n"
 111                         "PO BOX\n"
 112                         "33580 Tampere\n"
 113                         "FINLAND");
 114         gtk_dialog_run(GTK_DIALOG(dialog));
 115         gtk_widget_destroy(dialog);
 116 }
 117
 118 void show_cardware_dialog() {
 119         GConfClient* client = gconf_client_get_default();
 120         g_assert(GCONF_IS_CLIENT(client));
 121
 122         GConfValue* gcvalue = NULL;
 123         gcvalue = gconf_client_get_without_default(client, GCONF_KEY, NULL);
 124
 125         if(gcvalue == NULL) {
 126                 g_print("GConf key not found so show dialog.");
 127                 show_dialog();
 128                 gconf_client_set_bool(client, GCONF_KEY, TRUE, NULL);
 129         }
 130         g_object_unref(client);
 131 }
 132
 133 void load_settings() {
 134
 135 }