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 <glib.h>
#include <glib/gstdio.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

/* recursively remove an entire file system */
void rmdir_recursive(char *path) {
  GDir *dir = g_dir_open(path, 0, NULL);
  if(dir) {
    const char *name = g_dir_read_name(dir);
    while(name) {
      char *fullname = g_strdup_printf("%s/%s", path, name);
      //      printf("deleting %s\n", fullname);
      
      if(g_file_test(fullname, G_FILE_TEST_IS_DIR)) 
        rmdir_recursive(fullname);
      else if(g_file_test(fullname, G_FILE_TEST_IS_REGULAR)) 
        g_remove(fullname);

      g_free(fullname);
      name = g_dir_read_name(dir);
    }

    g_dir_close(dir);
  }
  g_rmdir(path);
}

#ifdef ENABLE_BROWSER_INTERFACE
static void on_link_clicked(GtkButton *button, gpointer data) {
  appdata_t *appdata = (appdata_t*)data;
  char *url = g_object_get_data(G_OBJECT(button), "url"); 
  if(url) browser_url(appdata, url);
}
#endif

/* a button containing a weblink */
GtkWidget *link_button_attrib(appdata_t *appdata, char *str, char *url, 
                       int size, int strikethrough) {

#ifdef ENABLE_BROWSER_INTERFACE
  if(url) {
    GtkWidget *button = gtk_button_attrib(str, size, strikethrough);
    g_object_set_data(G_OBJECT(button), "url", url); 
    gtk_signal_connect(GTK_OBJECT(button), "clicked",
                       (GtkSignalFunc)on_link_clicked, appdata);

    return button;
  }
#endif
  return gtk_label_attrib(str, size, strikethrough);
}

#ifdef ENABLE_BROWSER_INTERFACE
static void on_link_id_clicked(GtkButton *button, gpointer data) {
  appdata_t *appdata = (appdata_t*)data;

  unsigned int id = (unsigned int)g_object_get_data(G_OBJECT(button), "id"); 
  char *type = g_object_get_data(G_OBJECT(button), "type"); 

  char *url = g_strdup_printf("http://www.geocaching.com/%s?id=%u", 
                              type, id);

  if(url) {
    browser_url(appdata, url);
    g_free(url);
  }
}
#endif

GtkWidget *link_button_by_id(appdata_t *appdata, char *str, 
                             const char *type, int id) {

#ifdef ENABLE_BROWSER_INTERFACE
  if(id) {
    GtkWidget *ref = gtk_button_new_with_label(str);
#if defined(USE_MAEMO) && (MAEMO_VERSION_MAJOR == 5)
    //    hildon_gtk_widget_set_theme_size(ref, 
    //         (HILDON_SIZE_FINGER_HEIGHT | HILDON_SIZE_AUTO_WIDTH));
#endif  
    g_object_set_data(G_OBJECT(ref), "id", (gpointer)id);
    g_object_set_data(G_OBJECT(ref), "type", (gpointer)type);
    gtk_signal_connect(GTK_OBJECT(ref), "clicked",
                       GTK_SIGNAL_FUNC(on_link_id_clicked), appdata);
    
    return ref;
  }
#endif
  return gtk_label_new(str);
}


GtkWidget *link_icon_button_by_id(appdata_t *appdata, GtkWidget *icon, 
                             const char *type, int id) {

#ifdef ENABLE_BROWSER_INTERFACE
  if(id) {
    GtkWidget *ref = gtk_button_new();
    gtk_button_set_image(GTK_BUTTON(ref), icon);

#if defined(USE_MAEMO) && (MAEMO_VERSION_MAJOR == 5)
    //    hildon_gtk_widget_set_theme_size(ref, 
    //         (HILDON_SIZE_FINGER_HEIGHT | HILDON_SIZE_AUTO_WIDTH));
#endif  
    g_object_set_data(G_OBJECT(ref), "id", (gpointer)id);
    g_object_set_data(G_OBJECT(ref), "type", (gpointer)type);
    gtk_signal_connect(GTK_OBJECT(ref), "clicked",
                       GTK_SIGNAL_FUNC(on_link_id_clicked), appdata);
    
    return ref;
  }
#endif
  return icon;
}

/* left aligned, word wrapped multiline widget */
GtkWidget *simple_text_widget(char *text) {
  GtkWidget *label = gtk_label_new(text);
  
  gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
  gtk_label_set_line_wrap_mode(GTK_LABEL(label), PANGO_WRAP_WORD);
  gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);

  return label;
}
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 <glib.h>
25	#include <glib/gstdio.h>
26
27	#include "gpxview.h"
28
29	char strlastchr(char *str) {
30	return str[strlen(str)]-1;
31	}
32
33	/* make sure the entire path "dir" exists and create it if not */
34	int checkdir(char *dir) {
35	struct stat filestat;
36	char *p = dir, tmp;
37
38	/* don't try to create root dir */
39	if(p[0] == '/') p++;
40
41	do {
42	while(p && p != '/') p++;
43	tmp = *p;
44	*p = 0;
45
46	int err = stat(dir, &filestat);
47	if(err) {
48	if(mkdir(dir, S_IRWXU) != 0) {
49	perror("mkdir()");
50	*p++ = tmp;
51	return -1;
52	}
53	} else {
54	if(!filestat.st_mode & S_IFDIR) {
55	printf("File %s exists and is _no_ directory\n", dir);
56	*p++ = tmp;
57	return -1;
58	}
59	}
60
61	*p++ = tmp;
62	} while(tmp && strchr(p, '/'));
63
64	return 0;
65	}
66
67	void pos_lat_str(char *str, int len, float latitude) {
68	char *c = _("N");
69	float integral, fractional;
70
71	if(isnan(latitude))
72	str[0] = 0;
73	else {
74	if(latitude < 0) { latitude = fabs(latitude); c = _("S"); }
75	fractional = modff(latitude, &integral);
76
77	snprintf(str, len, "%s %02d° %06.3f'", c, (int)integral, fractional*60.0);
78	}
79	}
80
81	GtkWidget *pos_lat(float latitude, int size, int strikethrough) {
82	char str[32];
83
84	pos_lat_str(str, sizeof(str), latitude);
85	return gtk_label_attrib(str, size, strikethrough);
86	}
87
88	void pos_lon_str(char *str, int len, float longitude) {
89	char *c = _("E");
90	float integral, fractional;
91
92	if(isnan(longitude))
93	str[0] = 0;
94	else {
95	if(longitude < 0) { longitude = fabs(longitude); c = _("W"); }
96	fractional = modff(longitude, &integral);
97
98	snprintf(str, len, "%s %03d° %06.3f'", c, (int)integral, fractional*60.0);
99	}
100	}
101
102	GtkWidget *pos_lon(float longitude, int size, int strikethrough) {
103	char str[32];
104
105	pos_lon_str(str, sizeof(str), longitude);
106	return gtk_label_attrib(str, size, strikethrough);
107	}
108
109	float pos_parse_lat(char *str) {
110	int integral_int;
111	float fractional;
112	char c;
113
114	if(sscanf(str, "%c %d° %f'", &c, &integral_int, &fractional) == 3) {
115	c = toupper(c);
116
117	if(c != 'S' && c != 'N')
118	return NAN;
119
120	/* prevent -0.0 */
121	if(!integral_int && (fractional == 0.0))
122	return 0.0;
123
124	return ((c == 'S')?-1:+1) * (integral_int + fractional/60.0);
125	}
126
127	return NAN;
128	}
129
130	float pos_parse_lon(char *str) {
131	int integral_int;
132	float fractional;
133	char c;
134
135	if(sscanf(str, "%c %d° %f'", &c, &integral_int, &fractional) == 3) {
136	c = toupper(c);
137
138	/* O is german "Ost" for "East" */
139	if(c != 'E' && c != 'W' && c != 'O')
140	return NAN;
141
142	/* prevent -0.0 */
143	if(!integral_int && (fractional == 0.0))
144	return 0.0;
145
146	return ((c == 'W')?-1:+1) * (integral_int + fractional/60.0);
147	}
148
149	return NAN;
150	}
151
152	const char *pos_get_bearing_str(pos_t from, pos_t to) {
153	static const char *bear_str[]={
154	"N", "NE", "E", "SE", "S", "SW", "W", "NW" };
155	int idx = (gpx_pos_get_bearing(from, to)+22.5)/45.0;
156	/* make sure we stay in icon bounds */
157	while(idx < 0) idx += 8;
158	while(idx > 7) idx -= 8;
159	return _(bear_str[idx]);
160	}
161
162	/* the maemo font size is quite huge, so we adjust some fonts */
163	/* differently on maemo and non-maemo. Basically "BIG" does nothing */
164	/* on maemo and "SMALL" only does something on maemo */
165	#ifdef USE_MAEMO
166	#define MARKUP_SMALL "<span size='small'>%s</span>"
167	GtkWidget gtk_label_small(char str) {
168	GtkWidget *label = gtk_label_new("");
169	char *markup = g_markup_printf_escaped(MARKUP_SMALL, str);
170	gtk_label_set_markup(GTK_LABEL(label), markup);
171	g_free(markup);
172	return label;
173	}
174	#else
175	#define MARKUP_BIG "<span size='x-large'>%s</span>"
176	GtkWidget gtk_label_big(char str) {
177	GtkWidget *label = gtk_label_new("");
178	char *markup = g_markup_printf_escaped(MARKUP_BIG, str);
179	gtk_label_set_markup(GTK_LABEL(label), markup);
180	g_free(markup);
181	return label;
182	}
183	#endif
184
185	void gtk_label_attrib_set(GtkWidget *label,
186	char *str, int size, int strikethrough) {
187	char format[80];
188
189	snprintf(format, sizeof(format), "<span%s%s%s>%%s</span>",
190	#ifdef USE_MAEMO
191	(size==SIZE_SMALL)?" size='small'":"",
192	#else
193	(size==SIZE_BIG)?" size='x-large'":"",
194	#endif
195	strikethrough?" strikethrough='yes'":"",
196	(strikethrough==STRIKETHROUGH_RED)?" strikethrough_color='red'":"");
197
198	char *markup = g_markup_printf_escaped(format, str);
199	// printf("markup = %s\n", markup);
200	gtk_label_set_markup(GTK_LABEL(label), markup);
201	g_free(markup);
202	}
203
204	GtkWidget gtk_label_attrib(char str, int size, int strikethrough) {
205	GtkWidget *label = gtk_label_new("");
206	gtk_label_attrib_set(label, str, size, strikethrough);
207	return label;
208	}
209
210	GtkWidget gtk_button_attrib(char str, int size, int strikethrough) {
211	GtkWidget *button = gtk_button_new_with_label("");
212	gtk_label_attrib_set(gtk_bin_get_child(GTK_BIN(button)),
213	str, size, strikethrough);
214	return button;
215	}
216
217	void textbox_disable(GtkWidget *widget) {
218	gtk_editable_set_editable(GTK_EDITABLE(widget), FALSE);
219	gtk_widget_set_sensitive(widget, FALSE);
220	}
221
222	void textbox_enable(GtkWidget *widget) {
223	gtk_widget_set_sensitive(widget, TRUE);
224	gtk_editable_set_editable(GTK_EDITABLE(widget), TRUE);
225	}
226
227	pos_t get_pos(appdata_t appdata) {
228	pos_t *pos = &appdata->home;
229
230	if(appdata->active_location) {
231	int i = appdata->active_location-1;
232	location_t *loc = appdata->location;
233	while(i--) loc = loc->next;
234	pos = &loc->pos;
235	}
236
237	if(appdata->use_gps) {
238	pos = gps_get_pos(appdata);
239
240	if(!pos) pos = &appdata->gps; /* use saved position */
241	else appdata->gps = pos; / save position */
242	}
243	return pos;
244	}
245
246	void distance_str(char *str, int len, float dist, gboolean imperial) {
247	if(isnan(dist))
248	snprintf(str, len, "---");
249	else if(imperial) {
250	/* 1 mil = 1760 yd = 5280 ft ... */
251	if(dist<0.018) snprintf(str, len, "%.1f ft", dist*5280.0);
252	else if(dist<0.055) snprintf(str, len, "%.1f yd", dist*1760.0);
253	else if(dist<0.55) snprintf(str, len, "%.0f yd", dist*1760.0);
254	else if(dist<10.0) snprintf(str, len, "%.2f mi", dist);
255	else if(dist<100.0) snprintf(str, len, "%.1f mi", dist);
256	else snprintf(str, len, "%.0f mi", dist);
257	} else {
258	if(dist<0.01) snprintf(str, len, "%.2f m", dist*1000.0);
259	else if(dist<0.1) snprintf(str, len, "%.1f m", dist*1000.0);
260	else if(dist<1.0) snprintf(str, len, "%.0f m", dist*1000.0);
261	else if(dist<100.0) snprintf(str, len, "%.1f km", dist);
262	else snprintf(str, len, "%.0f km", dist);
263	}
264	}
265
266	/* return distance in miles or kilometers */
267	float distance_parse(char *str, gboolean imperial) {
268	char unit[4];
269	float val = NAN;
270
271	if(sscanf(str, "%f %3s", &val, unit) == 2) {
272	gboolean fimp = FALSE;
273
274	if(strcasecmp(unit, "ft") == 0) { fimp = TRUE; val /= 5280.0; }
275	else if(strcasecmp(unit, "yd") == 0) { fimp = TRUE; val /= 1760.0; }
276	else if(strcasecmp(unit, "mi") == 0) { fimp = TRUE; }
277	else if(strcasecmp(unit, "m") == 0) { fimp = FALSE; val /= 1000.0; }
278	else if(strcasecmp(unit, "km") == 0) { fimp = FALSE; }
279	else val = NAN;
280
281	/* found imperial and metric requested? convert miles into kilometers */
282	if(fimp & !imperial) val *= 1.609344;
283
284	/* found metric and imperial requested? convert kilometers into miles */
285	if(!fimp & imperial) val /= 1.609344;
286	}
287	return val;
288	}
289
290	static gboolean mark(GtkWidget *widget, gboolean valid) {
291	gtk_widget_set_state(widget, valid?GTK_STATE_NORMAL:TAG_STATE);
292	return valid;
293	}
294
295	static void callback_modified_lat(GtkWidget *widget, gpointer data ) {
296	float i = pos_parse_lat((char*)gtk_entry_get_text(GTK_ENTRY(widget)));
297	mark(widget, !isnan(i));
298	}
299
300	/* a entry that is colored red when being "active" */
301	GtkWidget *lat_entry_new(float lat) {
302	GdkColor color;
303	GtkWidget *widget = gtk_entry_new();
304	gdk_color_parse("#ff0000", &color);
305	gtk_widget_modify_text(widget, TAG_STATE, &color);
306
307	char str[32];
308	pos_lat_str(str, sizeof(str), lat);
309	gtk_entry_set_text(GTK_ENTRY(widget), str);
310
311	g_signal_connect(G_OBJECT(widget), "changed",
312	G_CALLBACK(callback_modified_lat), NULL);
313
314	return widget;
315	}
316
317	static void callback_modified_lon(GtkWidget *widget, gpointer data ) {
318	float i = pos_parse_lon((char*)gtk_entry_get_text(GTK_ENTRY(widget)));
319	mark(widget, !isnan(i));
320	}
321
322	/* a entry that is colored red when filled with invalid coordinate */
323	GtkWidget *lon_entry_new(float lon) {
324	GdkColor color;
325	GtkWidget *widget = gtk_entry_new();
326	gdk_color_parse("#ff0000", &color);
327	gtk_widget_modify_text(widget, TAG_STATE, &color);
328
329	char str[32];
330	pos_lon_str(str, sizeof(str), lon);
331	gtk_entry_set_text(GTK_ENTRY(widget), str);
332
333	g_signal_connect(G_OBJECT(widget), "changed",
334	G_CALLBACK(callback_modified_lon), NULL);
335
336	return widget;
337	}
338
339
340	float lat_get(GtkWidget *widget) {
341	char p = (char)gtk_entry_get_text(GTK_ENTRY(widget));
342	return pos_parse_lat(p);
343	}
344
345	float lon_get(GtkWidget *widget) {
346	char p = (char)gtk_entry_get_text(GTK_ENTRY(widget));
347	return pos_parse_lon(p);
348	}
349
350	static void callback_modified_dist(GtkWidget *widget, gpointer data ) {
351	/* don't care for metric/imperial since we only want to know if this */
352	/* is parseable at all */
353	float i = distance_parse((char*)gtk_entry_get_text(GTK_ENTRY(widget)), FALSE);
354	mark(widget, !isnan(i));
355	}
356
357	/* a entry that is colored red when filled with invalid distance */
358	GtkWidget *dist_entry_new(float dist, gboolean mil) {
359	GdkColor color;
360	GtkWidget *widget = gtk_entry_new();
361	gdk_color_parse("#ff0000", &color);
362	gtk_widget_modify_text(widget, TAG_STATE, &color);
363
364	char str[32];
365	distance_str(str, sizeof(str), dist, mil);
366	gtk_entry_set_text(GTK_ENTRY(widget), str);
367
368	g_signal_connect(G_OBJECT(widget), "changed",
369	G_CALLBACK(callback_modified_dist), NULL);
370
371	return widget;
372	}
373
374	float dist_get(GtkWidget *widget, gboolean mil) {
375	char p = (char)gtk_entry_get_text(GTK_ENTRY(widget));
376	return distance_parse(p, mil);
377	}
378
379	#ifndef USE_MAEMO
380	#ifdef ENABLE_BROWSER_INTERFACE
381	#include <libgnome/gnome-url.h>
382
383	int browser_url(appdata_t appdata, char url) {
384	/* taken from gnome-open, part of libgnome */
385	GError *err = NULL;
386	gnome_url_show(url, &err);
387	return 0;
388	}
389	#endif
390	#endif
391
392	/* recursively remove an entire file system */
393	void rmdir_recursive(char *path) {
394	GDir *dir = g_dir_open(path, 0, NULL);
395	if(dir) {
396	const char *name = g_dir_read_name(dir);
397	while(name) {
398	char *fullname = g_strdup_printf("%s/%s", path, name);
399	// printf("deleting %s\n", fullname);
400
401	if(g_file_test(fullname, G_FILE_TEST_IS_DIR))
402	rmdir_recursive(fullname);
403	else if(g_file_test(fullname, G_FILE_TEST_IS_REGULAR))
404	g_remove(fullname);
405
406	g_free(fullname);
407	name = g_dir_read_name(dir);
408	}
409
410	g_dir_close(dir);
411	}
412	g_rmdir(path);
413	}
414
415	#ifdef ENABLE_BROWSER_INTERFACE
416	static void on_link_clicked(GtkButton *button, gpointer data) {
417	appdata_t appdata = (appdata_t)data;
418	char *url = g_object_get_data(G_OBJECT(button), "url");
419	if(url) browser_url(appdata, url);
420	}
421	#endif
422
423	/* a button containing a weblink */
424	GtkWidget link_button_attrib(appdata_t appdata, char str, char url,
425	int size, int strikethrough) {
426
427	#ifdef ENABLE_BROWSER_INTERFACE
428	if(url) {
429	GtkWidget *button = gtk_button_attrib(str, size, strikethrough);
430	g_object_set_data(G_OBJECT(button), "url", url);
431	gtk_signal_connect(GTK_OBJECT(button), "clicked",
432	(GtkSignalFunc)on_link_clicked, appdata);
433
434	return button;
435	}
436	#endif
437	return gtk_label_attrib(str, size, strikethrough);
438	}
439
440	#ifdef ENABLE_BROWSER_INTERFACE
441	static void on_link_id_clicked(GtkButton *button, gpointer data) {
442	appdata_t appdata = (appdata_t)data;
443
444	unsigned int id = (unsigned int)g_object_get_data(G_OBJECT(button), "id");
445	char *type = g_object_get_data(G_OBJECT(button), "type");
446
447	char *url = g_strdup_printf("http://www.geocaching.com/%s?id=%u",
448	type, id);
449
450	if(url) {
451	browser_url(appdata, url);
452	g_free(url);
453	}
454	}
455	#endif
456
457	GtkWidget link_button_by_id(appdata_t appdata, char *str,
458	const char *type, int id) {
459
460	#ifdef ENABLE_BROWSER_INTERFACE
461	if(id) {
462	GtkWidget *ref = gtk_button_new_with_label(str);
463	#if defined(USE_MAEMO) && (MAEMO_VERSION_MAJOR == 5)
464	// hildon_gtk_widget_set_theme_size(ref,
465	// (HILDON_SIZE_FINGER_HEIGHT \| HILDON_SIZE_AUTO_WIDTH));
466	#endif
467	g_object_set_data(G_OBJECT(ref), "id", (gpointer)id);
468	g_object_set_data(G_OBJECT(ref), "type", (gpointer)type);
469	gtk_signal_connect(GTK_OBJECT(ref), "clicked",
470	GTK_SIGNAL_FUNC(on_link_id_clicked), appdata);
471
472	return ref;
473	}
474	#endif
475	return gtk_label_new(str);
476	}
477
478
479	GtkWidget link_icon_button_by_id(appdata_t appdata, GtkWidget *icon,
480	const char *type, int id) {
481
482	#ifdef ENABLE_BROWSER_INTERFACE
483	if(id) {
484	GtkWidget *ref = gtk_button_new();
485	gtk_button_set_image(GTK_BUTTON(ref), icon);
486
487	#if defined(USE_MAEMO) && (MAEMO_VERSION_MAJOR == 5)
488	// hildon_gtk_widget_set_theme_size(ref,
489	// (HILDON_SIZE_FINGER_HEIGHT \| HILDON_SIZE_AUTO_WIDTH));
490	#endif
491	g_object_set_data(G_OBJECT(ref), "id", (gpointer)id);
492	g_object_set_data(G_OBJECT(ref), "type", (gpointer)type);
493	gtk_signal_connect(GTK_OBJECT(ref), "clicked",
494	GTK_SIGNAL_FUNC(on_link_id_clicked), appdata);
495
496	return ref;
497	}
498	#endif
499	return icon;
500	}
501
502	/* left aligned, word wrapped multiline widget */
503	GtkWidget simple_text_widget(char text) {
504	GtkWidget *label = gtk_label_new(text);
505
506	gtk_label_set_line_wrap(GTK_LABEL(label), TRUE);
507	gtk_label_set_line_wrap_mode(GTK_LABEL(label), PANGO_WRAP_WORD);
508	gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);
509
510	return label;
511	}