trunk/src/misc.c

/*
 * Copyright (C) 2008 Till Harbaum <till@harbaum.org>.
 *
 * This file is part of GPXView.
 *
 * GPXView is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * GPXView is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GPXView.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <math.h>
#include <string.h>
#include <ctype.h>

#include "gpxview.h"

char strlastchr(char *str) {
  return str[strlen(str)]-1;
}

/* make sure the entire path "dir" exists and create it if not */
int checkdir(char *dir) {
  struct stat filestat;
  char *p = dir, tmp;

  /* don't try to create root dir */
  if(p[0] == '/') p++;

  do {
    while(*p && *p != '/') p++;
    tmp = *p;
    *p = 0;

    int err = stat(dir, &filestat);
    if(err) {
      if(mkdir(dir, S_IRWXU) != 0) {
        perror("mkdir()");
        *p++ = tmp;
        return -1;
      }
    } else {
      if(!filestat.st_mode & S_IFDIR) {
        printf("File %s exists and is _no_ directory\n", dir);
        *p++ = tmp;
        return -1;
      }
    }
    
    *p++ = tmp;
  } while(tmp && strchr(p, '/'));

  return 0;
}

void pos_lat_str(char *str, int len, float latitude) {
  char *c = _("N");
  float integral, fractional;

  if(isnan(latitude)) 
    str[0] = 0;
  else {
    if(latitude < 0) { latitude = fabs(latitude); c = _("S"); }
    fractional = modff(latitude, &integral);

    snprintf(str, len, "%s %02d° %06.3f'", c, (int)integral, fractional*60.0);
  }
}

GtkWidget *pos_lat(float latitude, int size, int strikethrough) {
  char str[32];

  pos_lat_str(str, sizeof(str), latitude);
  return gtk_label_attrib(str, size, strikethrough);
}

void pos_lon_str(char *str, int len, float longitude) {
  char *c = _("E");
  float integral, fractional;

  if(isnan(longitude)) 
    str[0] = 0;
  else {
    if(longitude < 0) { longitude = fabs(longitude); c = _("W"); }
    fractional = modff(longitude, &integral);

    snprintf(str, len, "%s %03d° %06.3f'", c, (int)integral, fractional*60.0);
  }
}

GtkWidget *pos_lon(float longitude, int size, int strikethrough) {
  char str[32];

  pos_lon_str(str, sizeof(str), longitude);
  return gtk_label_attrib(str, size, strikethrough);
}

float pos_parse_lat(char *str) {
  int integral_int;
  float fractional;
  char c;

  if(sscanf(str, "%c %d° %f'", &c, &integral_int, &fractional) == 3) {
    c = toupper(c);
    
    if(c != 'S' && c != 'N')
      return NAN;
    
    /* prevent -0.0 */
    if(!integral_int && (fractional == 0.0))
      return 0.0;

    return ((c == 'S')?-1:+1) * (integral_int + fractional/60.0);
  }
  
  return NAN;
}

float pos_parse_lon(char *str) {
  int integral_int;
  float fractional;
  char c;

  if(sscanf(str, "%c %d° %f'", &c, &integral_int, &fractional) == 3) {
    c = toupper(c);

    /* O is german "Ost" for "East" */
    if(c != 'E' && c != 'W' && c != 'O')
      return NAN;

    /* prevent -0.0 */
    if(!integral_int && (fractional == 0.0))
      return 0.0;

    return ((c == 'W')?-1:+1) * (integral_int + fractional/60.0);
  }

  return NAN;
}

const char *pos_get_bearing_str(pos_t from, pos_t to) {
  static const char *bear_str[]={ 
    "N", "NE", "E", "SE", "S", "SW", "W", "NW" };
  int idx = (gpx_pos_get_bearing(from, to)+22.5)/45.0;
  /* make sure we stay in icon bounds */
  while(idx < 0) idx += 8;
  while(idx > 7) idx -= 8;
  return _(bear_str[idx]);
}

/* the maemo font size is quite huge, so we adjust some fonts */
/* differently on maemo and non-maemo. Basically "BIG" does nothing */
/* on maemo and "SMALL" only does something on maemo */
#ifdef USE_MAEMO
#define MARKUP_SMALL "<span size='small'>%s</span>"
GtkWidget *gtk_label_small(char *str) {
  GtkWidget *label = gtk_label_new("");
  char *markup = g_markup_printf_escaped(MARKUP_SMALL, str);
  gtk_label_set_markup(GTK_LABEL(label), markup);
  g_free(markup);
  return label;
}
#else
#define MARKUP_BIG "<span size='x-large'>%s</span>"
GtkWidget *gtk_label_big(char *str) {
  GtkWidget *label = gtk_label_new("");
  char *markup = g_markup_printf_escaped(MARKUP_BIG, str);
  gtk_label_set_markup(GTK_LABEL(label), markup);
  g_free(markup);
  return label;
}
#endif

void gtk_label_attrib_set(GtkWidget *label, 
                          char *str, int size, int strikethrough) {
  char format[80];

  snprintf(format, sizeof(format), "<span%s%s%s>%%s</span>", 
#ifdef USE_MAEMO
   (size==SIZE_SMALL)?" size='small'":"",
#else
   (size==SIZE_BIG)?" size='x-large'":"",
#endif
   strikethrough?" strikethrough='yes'":"",
   (strikethrough==STRIKETHROUGH_RED)?" strikethrough_color='red'":"");

  char *markup = g_markup_printf_escaped(format, str);
  //  printf("markup = %s\n", markup);
  gtk_label_set_markup(GTK_LABEL(label), markup);
  g_free(markup);
}

GtkWidget *gtk_label_attrib(char *str, int size, int strikethrough) {
  GtkWidget *label = gtk_label_new("");
  gtk_label_attrib_set(label, str, size, strikethrough);
  return label;
}

GtkWidget *gtk_button_attrib(char *str, int size, int strikethrough) {
  GtkWidget *button = gtk_button_new_with_label("");
  gtk_label_attrib_set(gtk_bin_get_child(GTK_BIN(button)), 
                       str, size, strikethrough);
  return button;
}

void textbox_disable(GtkWidget *widget) {
  gtk_editable_set_editable(GTK_EDITABLE(widget), FALSE);
  gtk_widget_set_sensitive(widget, FALSE);
}

void textbox_enable(GtkWidget *widget) {
  gtk_widget_set_sensitive(widget, TRUE);
  gtk_editable_set_editable(GTK_EDITABLE(widget), TRUE);
}

pos_t *get_pos(appdata_t *appdata) {
  pos_t *pos = &appdata->home;

  if(appdata->active_location) {
    int i = appdata->active_location-1;
    location_t *loc = appdata->location;
    while(i--) loc = loc->next;
    pos = &loc->pos;
  }

  if(appdata->use_gps) {
    pos = gps_get_pos(appdata);

    if(!pos) pos = &appdata->gps;   /* use saved position */
    else     appdata->gps = *pos;   /* save position */
  }
  return pos;
}

void distance_str(char *str, int len, float dist, gboolean imperial) {
  if(isnan(dist))
    snprintf(str, len, "---");
  else if(imperial) {
    /* 1 mil = 1760 yd = 5280 ft ... */
    if(dist<0.018)      snprintf(str, len, "%.1f ft", dist*5280.0);
    else if(dist<0.055) snprintf(str, len, "%.1f yd", dist*1760.0);
    else if(dist<0.55)  snprintf(str, len, "%.0f yd", dist*1760.0);
    else if(dist<10.0)  snprintf(str, len, "%.2f mi", dist);
    else if(dist<100.0) snprintf(str, len, "%.1f mi", dist);
    else                snprintf(str, len, "%.0f mi", dist);
  } else {
    if(dist<0.01)       snprintf(str, len, "%.2f m",  dist*1000.0);
    else if(dist<0.1)   snprintf(str, len, "%.1f m",  dist*1000.0);
    else if(dist<1.0)   snprintf(str, len, "%.0f m",  dist*1000.0);
    else if(dist<100.0) snprintf(str, len, "%.1f km", dist);
    else                snprintf(str, len, "%.0f km", dist);
  }
}

/* return distance in miles or kilometers */
float distance_parse(char *str, gboolean imperial) {
  char unit[4];
  float val = NAN;

  if(sscanf(str, "%f %3s", &val, unit) == 2) {
    gboolean fimp = FALSE;

    if(strcasecmp(unit, "ft") == 0)      { fimp = TRUE;  val /= 5280.0; }
    else if(strcasecmp(unit, "yd") == 0) { fimp = TRUE;  val /= 1760.0; }
    else if(strcasecmp(unit, "mi") == 0) { fimp = TRUE;  }
    else if(strcasecmp(unit, "m")  == 0) { fimp = FALSE; val /= 1000.0; }
    else if(strcasecmp(unit, "km") == 0) { fimp = FALSE; }
    else val = NAN;

    /* found imperial and metric requested? convert miles into kilometers */
    if(fimp & !imperial) val *= 1.609344;

    /* found metric and imperial requested? convert kilometers into miles */
    if(!fimp & imperial) val /= 1.609344;
  }
  return val;
}

static gboolean mark(GtkWidget *widget, gboolean valid) {
  gtk_widget_set_state(widget, valid?GTK_STATE_NORMAL:TAG_STATE);
  return valid;
}

static void callback_modified_lat(GtkWidget *widget, gpointer data ) {
  float i = pos_parse_lat((char*)gtk_entry_get_text(GTK_ENTRY(widget)));
  mark(widget, !isnan(i));
}

/* a entry that is colored red when being "active" */
GtkWidget *lat_entry_new(float lat) {
  GdkColor color;
  GtkWidget *widget = gtk_entry_new();
  gdk_color_parse("#ff0000", &color);
  gtk_widget_modify_text(widget, TAG_STATE, &color);

  char str[32];
  pos_lat_str(str, sizeof(str), lat);
  gtk_entry_set_text(GTK_ENTRY(widget), str);

  g_signal_connect(G_OBJECT(widget), "changed",
                   G_CALLBACK(callback_modified_lat), NULL);
 
  return widget;
}

static void callback_modified_lon(GtkWidget *widget, gpointer data ) {
  float i = pos_parse_lon((char*)gtk_entry_get_text(GTK_ENTRY(widget)));
  mark(widget, !isnan(i));
}

/* a entry that is colored red when filled with invalid coordinate */
GtkWidget *lon_entry_new(float lon) {
  GdkColor color;
  GtkWidget *widget = gtk_entry_new();
  gdk_color_parse("#ff0000", &color);
  gtk_widget_modify_text(widget, TAG_STATE, &color);

  char str[32];
  pos_lon_str(str, sizeof(str), lon);
  gtk_entry_set_text(GTK_ENTRY(widget), str);

  g_signal_connect(G_OBJECT(widget), "changed",
                   G_CALLBACK(callback_modified_lon), NULL);
 
  return widget;
}


float lat_get(GtkWidget *widget) {
  char *p = (char*)gtk_entry_get_text(GTK_ENTRY(widget));
  return pos_parse_lat(p);
}

float lon_get(GtkWidget *widget) {
  char *p = (char*)gtk_entry_get_text(GTK_ENTRY(widget));
  return pos_parse_lon(p);
}

static void callback_modified_dist(GtkWidget *widget, gpointer data ) {
  /* don't care for metric/imperial since we only want to know if this */
  /* is parseable at all */
  float i = distance_parse((char*)gtk_entry_get_text(GTK_ENTRY(widget)), FALSE);
  mark(widget, !isnan(i));
}

/* a entry that is colored red when filled with invalid distance */
GtkWidget *dist_entry_new(float dist, gboolean mil) {
  GdkColor color;
  GtkWidget *widget = gtk_entry_new();
  gdk_color_parse("#ff0000", &color);
  gtk_widget_modify_text(widget, TAG_STATE, &color);

  char str[32];
  distance_str(str, sizeof(str), dist, mil);
  gtk_entry_set_text(GTK_ENTRY(widget), str);

  g_signal_connect(G_OBJECT(widget), "changed",
                   G_CALLBACK(callback_modified_dist), NULL);
 
  return widget;
}

float dist_get(GtkWidget *widget, gboolean mil) {
  char *p = (char*)gtk_entry_get_text(GTK_ENTRY(widget));
  return distance_parse(p, mil);
}

#ifndef USE_MAEMO
#ifdef ENABLE_BROWSER_INTERFACE
#include <libgnome/gnome-url.h>

int browser_url(appdata_t *appdata, char *url) {
  /* taken from gnome-open, part of libgnome */
  GError *err = NULL;
  gnome_url_show(url, &err);
  return 0;
}
#endif
#endif
1	harbaum	1	/*
2			* Copyright (C) 2008 Till Harbaum <till@harbaum.org>.
3			*
4			* This file is part of GPXView.
5			*
6			* GPXView is free software: you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation, either version 3 of the License, or
9			* (at your option) any later version.
10			*
11			* GPXView is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with GPXView. If not, see <http://www.gnu.org/licenses/>.
18			*/
19
20			#include <math.h>
21			#include <string.h>
22			#include <ctype.h>
23
24			#include "gpxview.h"
25
26			char strlastchr(char *str) {
27			return str[strlen(str)]-1;
28			}
29
30			/* make sure the entire path "dir" exists and create it if not */
31			int checkdir(char *dir) {
32			struct stat filestat;
33			char *p = dir, tmp;
34
35			/* don't try to create root dir */
36			if(p[0] == '/') p++;
37
38			do {
39			while(p && p != '/') p++;
40			tmp = *p;
41			*p = 0;
42
43			int err = stat(dir, &filestat);
44			if(err) {
45			if(mkdir(dir, S_IRWXU) != 0) {
46			perror("mkdir()");
47			*p++ = tmp;
48			return -1;
49			}
50			} else {
51			if(!filestat.st_mode & S_IFDIR) {
52			printf("File %s exists and is _no_ directory\n", dir);
53			*p++ = tmp;
54			return -1;
55			}
56			}
57
58			*p++ = tmp;
59			} while(tmp && strchr(p, '/'));
60
61			return 0;
62			}
63
64			void pos_lat_str(char *str, int len, float latitude) {
65			char *c = _("N");
66			float integral, fractional;
67
68	harbaum	13	if(isnan(latitude))
69			str[0] = 0;
70			else {
71			if(latitude < 0) { latitude = fabs(latitude); c = _("S"); }
72			fractional = modff(latitude, &integral);
73	harbaum	1
74	harbaum	13	snprintf(str, len, "%s %02d° %06.3f'", c, (int)integral, fractional*60.0);
75			}
76	harbaum	1	}
77
78			GtkWidget *pos_lat(float latitude, int size, int strikethrough) {
79			char str[32];
80
81			pos_lat_str(str, sizeof(str), latitude);
82			return gtk_label_attrib(str, size, strikethrough);
83			}
84
85			void pos_lon_str(char *str, int len, float longitude) {
86			char *c = _("E");
87			float integral, fractional;
88
89	harbaum	13	if(isnan(longitude))
90			str[0] = 0;
91			else {
92			if(longitude < 0) { longitude = fabs(longitude); c = _("W"); }
93			fractional = modff(longitude, &integral);
94	harbaum	1
95	harbaum	13	snprintf(str, len, "%s %03d° %06.3f'", c, (int)integral, fractional*60.0);
96			}
97	harbaum	1	}
98
99			GtkWidget *pos_lon(float longitude, int size, int strikethrough) {
100			char str[32];
101
102			pos_lon_str(str, sizeof(str), longitude);
103			return gtk_label_attrib(str, size, strikethrough);
104			}
105
106			float pos_parse_lat(char *str) {
107			int integral_int;
108			float fractional;
109			char c;
110
111			if(sscanf(str, "%c %d° %f'", &c, &integral_int, &fractional) == 3) {
112			c = toupper(c);
113
114			if(c != 'S' && c != 'N')
115			return NAN;
116
117			/* prevent -0.0 */
118			if(!integral_int && (fractional == 0.0))
119			return 0.0;
120
121			return ((c == 'S')?-1:+1) * (integral_int + fractional/60.0);
122			}
123
124			return NAN;
125			}
126
127			float pos_parse_lon(char *str) {
128			int integral_int;
129			float fractional;
130			char c;
131
132			if(sscanf(str, "%c %d° %f'", &c, &integral_int, &fractional) == 3) {
133			c = toupper(c);
134
135			/* O is german "Ost" for "East" */
136			if(c != 'E' && c != 'W' && c != 'O')
137			return NAN;
138
139			/* prevent -0.0 */
140			if(!integral_int && (fractional == 0.0))
141			return 0.0;
142
143			return ((c == 'W')?-1:+1) * (integral_int + fractional/60.0);
144			}
145
146			return NAN;
147			}
148
149			const char *pos_get_bearing_str(pos_t from, pos_t to) {
150			static const char *bear_str[]={
151			"N", "NE", "E", "SE", "S", "SW", "W", "NW" };
152			int idx = (gpx_pos_get_bearing(from, to)+22.5)/45.0;
153			/* make sure we stay in icon bounds */
154			while(idx < 0) idx += 8;
155			while(idx > 7) idx -= 8;
156			return _(bear_str[idx]);
157			}
158
159			/* the maemo font size is quite huge, so we adjust some fonts */
160			/* differently on maemo and non-maemo. Basically "BIG" does nothing */
161			/* on maemo and "SMALL" only does something on maemo */
162			#ifdef USE_MAEMO
163			#define MARKUP_SMALL "<span size='small'>%s</span>"
164			GtkWidget gtk_label_small(char str) {
165			GtkWidget *label = gtk_label_new("");
166			char *markup = g_markup_printf_escaped(MARKUP_SMALL, str);
167			gtk_label_set_markup(GTK_LABEL(label), markup);
168			g_free(markup);
169			return label;
170			}
171			#else
172			#define MARKUP_BIG "<span size='x-large'>%s</span>"
173			GtkWidget gtk_label_big(char str) {
174			GtkWidget *label = gtk_label_new("");
175			char *markup = g_markup_printf_escaped(MARKUP_BIG, str);
176			gtk_label_set_markup(GTK_LABEL(label), markup);
177			g_free(markup);
178			return label;
179			}
180			#endif
181
182			void gtk_label_attrib_set(GtkWidget *label,
183			char *str, int size, int strikethrough) {
184			char format[80];
185
186			snprintf(format, sizeof(format), "<span%s%s%s>%%s</span>",
187			#ifdef USE_MAEMO
188			(size==SIZE_SMALL)?" size='small'":"",
189			#else
190			(size==SIZE_BIG)?" size='x-large'":"",
191			#endif
192			strikethrough?" strikethrough='yes'":"",
193			(strikethrough==STRIKETHROUGH_RED)?" strikethrough_color='red'":"");
194
195			char *markup = g_markup_printf_escaped(format, str);
196			// printf("markup = %s\n", markup);
197			gtk_label_set_markup(GTK_LABEL(label), markup);
198			g_free(markup);
199			}
200
201			GtkWidget gtk_label_attrib(char str, int size, int strikethrough) {
202			GtkWidget *label = gtk_label_new("");
203			gtk_label_attrib_set(label, str, size, strikethrough);
204			return label;
205			}
206
207			GtkWidget gtk_button_attrib(char str, int size, int strikethrough) {
208			GtkWidget *button = gtk_button_new_with_label("");
209			gtk_label_attrib_set(gtk_bin_get_child(GTK_BIN(button)),
210			str, size, strikethrough);
211			return button;
212			}
213
214			void textbox_disable(GtkWidget *widget) {
215			gtk_editable_set_editable(GTK_EDITABLE(widget), FALSE);
216			gtk_widget_set_sensitive(widget, FALSE);
217			}
218
219			void textbox_enable(GtkWidget *widget) {
220			gtk_widget_set_sensitive(widget, TRUE);
221			gtk_editable_set_editable(GTK_EDITABLE(widget), TRUE);
222			}
223
224			pos_t get_pos(appdata_t appdata) {
225			pos_t *pos = &appdata->home;
226
227			if(appdata->active_location) {
228			int i = appdata->active_location-1;
229			location_t *loc = appdata->location;
230			while(i--) loc = loc->next;
231			pos = &loc->pos;
232			}
233
234			if(appdata->use_gps) {
235			pos = gps_get_pos(appdata);
236
237			if(!pos) pos = &appdata->gps; /* use saved position */
238			else appdata->gps = pos; / save position */
239			}
240			return pos;
241			}
242
243			void distance_str(char *str, int len, float dist, gboolean imperial) {
244	harbaum	34	if(isnan(dist))
245			snprintf(str, len, "---");
246			else if(imperial) {
247	harbaum	1	/* 1 mil = 1760 yd = 5280 ft ... */
248			if(dist<0.018) snprintf(str, len, "%.1f ft", dist*5280.0);
249			else if(dist<0.055) snprintf(str, len, "%.1f yd", dist*1760.0);
250			else if(dist<0.55) snprintf(str, len, "%.0f yd", dist*1760.0);
251			else if(dist<10.0) snprintf(str, len, "%.2f mi", dist);
252			else if(dist<100.0) snprintf(str, len, "%.1f mi", dist);
253			else snprintf(str, len, "%.0f mi", dist);
254			} else {
255			if(dist<0.01) snprintf(str, len, "%.2f m", dist*1000.0);
256			else if(dist<0.1) snprintf(str, len, "%.1f m", dist*1000.0);
257			else if(dist<1.0) snprintf(str, len, "%.0f m", dist*1000.0);
258			else if(dist<100.0) snprintf(str, len, "%.1f km", dist);
259			else snprintf(str, len, "%.0f km", dist);
260			}
261			}
262
263			/* return distance in miles or kilometers */
264			float distance_parse(char *str, gboolean imperial) {
265			char unit[4];
266			float val = NAN;
267
268			if(sscanf(str, "%f %3s", &val, unit) == 2) {
269			gboolean fimp = FALSE;
270
271			if(strcasecmp(unit, "ft") == 0) { fimp = TRUE; val /= 5280.0; }
272			else if(strcasecmp(unit, "yd") == 0) { fimp = TRUE; val /= 1760.0; }
273			else if(strcasecmp(unit, "mi") == 0) { fimp = TRUE; }
274			else if(strcasecmp(unit, "m") == 0) { fimp = FALSE; val /= 1000.0; }
275			else if(strcasecmp(unit, "km") == 0) { fimp = FALSE; }
276			else val = NAN;
277
278			/* found imperial and metric requested? convert miles into kilometers */
279			if(fimp & !imperial) val *= 1.609344;
280
281			/* found metric and imperial requested? convert kilometers into miles */
282			if(!fimp & imperial) val /= 1.609344;
283			}
284			return val;
285			}
286
287			static gboolean mark(GtkWidget *widget, gboolean valid) {
288			gtk_widget_set_state(widget, valid?GTK_STATE_NORMAL:TAG_STATE);
289			return valid;
290			}
291
292			static void callback_modified_lat(GtkWidget *widget, gpointer data ) {
293			float i = pos_parse_lat((char*)gtk_entry_get_text(GTK_ENTRY(widget)));
294			mark(widget, !isnan(i));
295			}
296
297			/* a entry that is colored red when being "active" */
298			GtkWidget *lat_entry_new(float lat) {
299			GdkColor color;
300			GtkWidget *widget = gtk_entry_new();
301			gdk_color_parse("#ff0000", &color);
302			gtk_widget_modify_text(widget, TAG_STATE, &color);
303
304			char str[32];
305			pos_lat_str(str, sizeof(str), lat);
306			gtk_entry_set_text(GTK_ENTRY(widget), str);
307
308			g_signal_connect(G_OBJECT(widget), "changed",
309			G_CALLBACK(callback_modified_lat), NULL);
310
311			return widget;
312			}
313
314			static void callback_modified_lon(GtkWidget *widget, gpointer data ) {
315			float i = pos_parse_lon((char*)gtk_entry_get_text(GTK_ENTRY(widget)));
316			mark(widget, !isnan(i));
317			}
318
319			/* a entry that is colored red when filled with invalid coordinate */
320			GtkWidget *lon_entry_new(float lon) {
321			GdkColor color;
322			GtkWidget *widget = gtk_entry_new();
323			gdk_color_parse("#ff0000", &color);
324			gtk_widget_modify_text(widget, TAG_STATE, &color);
325
326			char str[32];
327			pos_lon_str(str, sizeof(str), lon);
328			gtk_entry_set_text(GTK_ENTRY(widget), str);
329
330			g_signal_connect(G_OBJECT(widget), "changed",
331			G_CALLBACK(callback_modified_lon), NULL);
332
333			return widget;
334			}
335
336
337			float lat_get(GtkWidget *widget) {
338			char p = (char)gtk_entry_get_text(GTK_ENTRY(widget));
339			return pos_parse_lat(p);
340			}
341
342			float lon_get(GtkWidget *widget) {
343			char p = (char)gtk_entry_get_text(GTK_ENTRY(widget));
344			return pos_parse_lon(p);
345			}
346
347			static void callback_modified_dist(GtkWidget *widget, gpointer data ) {
348			/* don't care for metric/imperial since we only want to know if this */
349			/* is parseable at all */
350			float i = distance_parse((char*)gtk_entry_get_text(GTK_ENTRY(widget)), FALSE);
351			mark(widget, !isnan(i));
352			}
353
354			/* a entry that is colored red when filled with invalid distance */
355			GtkWidget *dist_entry_new(float dist, gboolean mil) {
356			GdkColor color;
357			GtkWidget *widget = gtk_entry_new();
358			gdk_color_parse("#ff0000", &color);
359			gtk_widget_modify_text(widget, TAG_STATE, &color);
360
361			char str[32];
362			distance_str(str, sizeof(str), dist, mil);
363			gtk_entry_set_text(GTK_ENTRY(widget), str);
364
365			g_signal_connect(G_OBJECT(widget), "changed",
366			G_CALLBACK(callback_modified_dist), NULL);
367
368			return widget;
369			}
370
371			float dist_get(GtkWidget *widget, gboolean mil) {
372			char p = (char)gtk_entry_get_text(GTK_ENTRY(widget));
373			return distance_parse(p, mil);
374			}
375
376			#ifndef USE_MAEMO
377			#ifdef ENABLE_BROWSER_INTERFACE
378			#include <libgnome/gnome-url.h>
379
380			int browser_url(appdata_t appdata, char url) {
381			/* taken from gnome-open, part of libgnome */
382			GError *err = NULL;
383			gnome_url_show(url, &err);
384			return 0;
385			}
386			#endif
387			#endif