2 Speedometer, shows your current speed using GPS
3 Copyright (C) 2008 Wellu Mäkinen <wellu@wellu.org>
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.
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.
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/>.
20 #include <glib/gprintf.h>
21 #include <gdk-pixbuf/gdk-pixbuf.h>
23 #include <gconf/gconf-client.h>
26 #include "callbacks.h"
28 #define GCONF_KEY "/apps/Maemo/speedometer/disclaimer"
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:
36 * m/s, km/h, mph, f/s, knot
38 gdouble conversion[] = { 1, 3.6, 2.237, 3.281, 1.944 };
41 // TODO: wrap this mess up somewhere
43 static GdkPixbuf* big_graphics[15];
44 static GdkPixbuf* small_graphics[15];
45 static GtkWidget* digits[5];
46 static GtkWidget* unit_graphic;
48 #define IMAGE_PATH "/usr/share/speedometer/%d.png"
50 static void set_widget_bg_black(GtkWidget* widget) {
56 gtk_widget_modify_bg(GTK_WIDGET(widget), GTK_STATE_NORMAL, &black);
60 /* Loads all the graphics from the disk and
61 * scales the images down to be used in several
62 * places. Might block for few seconds depending
65 void load_graphics() {
66 g_print("Loading and scaling images\n");
69 /* This loop will load all the images from the disk
70 * and store the pixbufs to the array. Pixbufs are
71 * correct size to be used in the big digits.
74 char* path = g_malloc(30);
75 g_sprintf(path, IMAGE_PATH, i);
79 big_graphics[i] = gdk_pixbuf_new_from_file_at_scale(path,
85 g_print("Error loading big graphics: %s\n", error->message);
89 small_graphics[i] = gdk_pixbuf_new_from_file_at_scale(path,
95 g_print("Error loading small graphics: %s\n", error->message);
105 void set_digits_to_zero() {
106 digits[0] = gtk_image_new_from_pixbuf(big_graphics[0]);
107 digits[1] = gtk_image_new_from_pixbuf(big_graphics[0]);
108 digits[2] = gtk_image_new_from_pixbuf(big_graphics[0]);
109 digits[3] = gtk_image_new_from_pixbuf(small_graphics[0]);
110 digits[4] = gtk_image_new_from_pixbuf(small_graphics[0]);
111 // TODO: load this from GConf
112 unit_graphic = gtk_image_new_from_pixbuf(small_graphics[11]);
115 static void set_nth_digit(guint n, guint value) {
116 g_assert(value < 10);
120 GtkWidget* image = digits[n];
121 GdkPixbuf* buf = big_graphics[value];
122 gtk_image_set_from_pixbuf(GTK_IMAGE(image), buf);
125 GtkWidget* image = digits[n];
126 GdkPixbuf* buf = small_graphics[value];
127 gtk_image_set_from_pixbuf(GTK_IMAGE(image), buf);
131 static void repaint_all_digits() {
132 gtk_widget_queue_draw(GTK_WIDGET(digits[0]));
133 gtk_widget_queue_draw(GTK_WIDGET(digits[1]));
134 gtk_widget_queue_draw(GTK_WIDGET(digits[2]));
137 void create_ui(AppData* appdata) {
141 GtkWidget *bottom_hbox;
144 vbox = gtk_vbox_new(FALSE, 0);
145 top_hbox = gtk_hbox_new(TRUE, 0);
146 bottom_hbox = gtk_hbox_new(TRUE, 0);
148 GtkWidget* event_box = gtk_event_box_new();
150 g_signal_connect(G_OBJECT(event_box),
152 G_CALLBACK(long_tap),
154 gtk_widget_tap_and_hold_setup(event_box, NULL, NULL, 0);
156 g_signal_connect(G_OBJECT(event_box),
157 "button_press_event",
158 G_CALLBACK(short_tap),
161 g_signal_connect(G_OBJECT(appdata->window),
163 G_CALLBACK(gtk_main_quit),
166 g_signal_connect(G_OBJECT(appdata->window),
168 G_CALLBACK(key_press_cb),
171 // add three big digits to the hbox
172 // creates the top row where big digits are placed
173 gtk_box_pack_start(GTK_BOX(top_hbox), GTK_WIDGET(digits[0]), FALSE, FALSE, 0);
174 gtk_box_pack_start(GTK_BOX(top_hbox), GTK_WIDGET(digits[1]), FALSE, FALSE, 0);
175 gtk_box_pack_start(GTK_BOX(top_hbox), GTK_WIDGET(digits[2]), FALSE, FALSE, 0);
177 // add small digits to another hbox
178 // creates the bottom row with decimals and unit graphic
179 gtk_box_pack_start(GTK_BOX(bottom_hbox), GTK_WIDGET(unit_graphic), FALSE, FALSE, 0);
180 gtk_box_pack_start(GTK_BOX(bottom_hbox), GTK_WIDGET(digits[3]), FALSE, FALSE, 0);
181 gtk_box_pack_start(GTK_BOX(bottom_hbox), GTK_WIDGET(digits[4]), FALSE, FALSE, 0);
183 // add event boxes to the vbox
184 gtk_box_pack_start_defaults(GTK_BOX(vbox), top_hbox);
185 gtk_box_pack_start_defaults(GTK_BOX(vbox), bottom_hbox);
187 // add vertival box to the event box
188 gtk_container_add(GTK_CONTAINER(event_box), GTK_WIDGET(vbox));
190 // finally add the event box with all the children to the window
191 gtk_container_add(GTK_CONTAINER(appdata->window), GTK_WIDGET(event_box));
193 // set backgrounds black
194 set_widget_bg_black(GTK_WIDGET(appdata->window));
195 set_widget_bg_black(event_box);
197 gtk_window_fullscreen(GTK_WINDOW(appdata->window));
198 gtk_widget_show_all(GTK_WIDGET(appdata->window));
204 if(unit >= UNIT_COUNT) {
207 g_print("Unit used in conversion: %f\n", conversion[unit]);
209 GdkPixbuf* buf = small_graphics[10 + unit];
210 gtk_image_set_from_pixbuf(GTK_IMAGE(unit_graphic), buf);
213 void interpret_and_set_speed(gdouble speed) {
214 g_assert(!isnan(speed));
216 /* speed is in m/s so let's convert
217 * it to the unit that we are using
219 speed *= conversion[unit];
221 /* we need to limit the speed down to
222 * less than 1000 whatever or else hell
223 * breaks loose in the form of assert
225 if(!(fabs(speed) < 1000)) {
226 g_print("Ahem, may I suggest to limit the speed (%f) a bit, Sir.\n", speed);
230 /* Convert float to a 6 digits (including dot) wide
231 * string with leading zeros. After conversion
232 * the speed looks like:
234 * 009.20 (9,20 km/h) or
235 * 010.90 (10,90 km/h) or
236 * 120.10 (120,10 km/h)
238 * Now, regardless of speed we know the position
239 * of the digits and can access the array directly.
241 gchar* charspeed = g_malloc(10); // alloc
242 g_sprintf(charspeed, "%0*.2f", 6, speed);
244 g_print("Speed is %s km/h\n", charspeed);
246 // these three lines will set the big digits
247 set_nth_digit(0, g_ascii_digit_value(charspeed[0]));
248 set_nth_digit(1, g_ascii_digit_value(charspeed[1]));
249 set_nth_digit(2, g_ascii_digit_value(charspeed[2]));
251 // these two lines will set the small digits
252 set_nth_digit(3, g_ascii_digit_value(charspeed[4]));
253 set_nth_digit(4, g_ascii_digit_value(charspeed[5]));
255 repaint_all_digits();
260 static void show_dialog() {
261 GtkWidget *dialog = gtk_message_dialog_new(
266 "This program is licensed under GNU General Public License, "
267 "which means (among other things) that you don't have to pay "
269 "PS. Long-tapping on the screen will quit the program.");
270 gtk_dialog_run(GTK_DIALOG(dialog));
271 gtk_widget_destroy(dialog);
274 void show_cardware_dialog() {
275 GConfClient* client = gconf_client_get_default();
276 g_assert(GCONF_IS_CLIENT(client));
278 GConfValue* gcvalue = NULL;
279 gcvalue = gconf_client_get_without_default(client, GCONF_KEY, NULL);
281 if(gcvalue == NULL) {
282 g_print("GConf key not found so show dialog.\n");
284 gconf_client_set_bool(client, GCONF_KEY, TRUE, NULL);
286 g_object_unref(client);