trunk/src/geomath.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 "gpxview.h"
#include <math.h>

#if defined(USE_MAEMO) && (MAEMO_VERSION_MAJOR >= 5)
#include <hildon/hildon-entry.h>
#endif

#define STR_NAN  "----"

typedef struct {
  appdata_t *appdata;

  GtkWidget *lon1, *lat1, *dist1, *dir1;
  GtkWidget *lon2, *lat2;

  GtkWidget *distance, *proj_lat, *proj_lon;
  GtkWidget *middle_lat, *middle_lon;
} math_dialog_state_t;

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

/* a entry that is colored red when being "active" */
static GtkWidget *gtk_red_entry_new(void) {
  GdkColor color;
  GtkWidget *widget = entry_new();
  gdk_color_parse("#ff0000", &color);
  gtk_widget_modify_text(widget, TAG_STATE, &color);
  return widget;
}

/* a label that is colored red when being "active" */
static GtkWidget *gtk_red_label_new(char *str) {
  GdkColor color;
  GtkWidget *widget = left_label_new(str);
  gdk_color_parse("#ff0000", &color);
  gtk_widget_modify_fg(widget, TAG_STATE, &color);
  return widget;
}

static GtkWidget *gtk_dir_entry_new(float val) {
  char str[16];
  GtkWidget *w = gtk_red_entry_new();
  
  snprintf(str, sizeof(str), _("%.1f°"), val);
  gtk_entry_set_text(GTK_ENTRY(w), str);

  return w;
}

float pos_lat_eval_combo(GtkWidget *widget) {
  char *p = (char*)gtk_combo_box_get_active_text(GTK_COMBO_BOX(widget));
  float val = pos_parse_lat(p);
  mark(widget, !isnan(val));

  return val;
}

static float distance_eval(GtkWidget *widget, math_dialog_state_t *state) {
  char *p = (char*)gtk_entry_get_text(GTK_ENTRY(widget));
  float val = distance_parse(p, state->appdata->imperial);
  mark(widget, !isnan(val));

  return val;
}

float direction_eval(GtkWidget *widget) {
  char *p = (char*)gtk_entry_get_text(GTK_ENTRY(widget));
  float val;
  if(sscanf(p, _("%f°"), &val) != 1)
    val = NAN;

  mark(widget, !isnan(val));

  return val;
}

static void on_calc_clicked(GtkButton *button, gpointer user_data) {
  math_dialog_state_t *state = (math_dialog_state_t*)user_data;
  pos_t pos1, pos2;
  gboolean pos1_ok = FALSE, pos2_ok = FALSE;
  float dist1;
  gboolean dist1_ok = FALSE;
  float dir1;
  gboolean dir1_ok = FALSE;

  /* parse input */
  pos1.lat = lat_entry_get(state->lat1);
  pos1.lon = lon_entry_get(state->lon1);
  if(!isnan(pos1.lat) && !isnan(pos1.lon)) pos1_ok = TRUE;

  pos2.lat = lat_entry_get(state->lat2);
  pos2.lon = lon_entry_get(state->lon2);
  if(!isnan(pos2.lat) && !isnan(pos2.lon)) pos2_ok = TRUE;

  dist1 = distance_eval(state->dist1, state);
  if(!isnan(dist1)) dist1_ok = TRUE;

  dir1 = direction_eval(state->dir1);
  if(!isnan(dir1)) dir1_ok = TRUE;

  /* ------------------- do all calculations ------------------- */


  /* ------------------- distance of coo1 and coo2  ------------------- */
  if(mark(state->distance, pos1_ok && pos2_ok)) {
    char str[32];
    float dist = gpx_pos_get_distance(pos1, pos2, state->appdata->imperial);  
    distance_str(str, sizeof(str), dist, state->appdata->imperial);

    gtk_label_set_text(GTK_LABEL(state->distance), str);
  } else
    gtk_label_set_text(GTK_LABEL(state->distance), STR_NAN);

  // N 53° 09.033'  W 001° 50.666' 100km / 30° = N 53° 55.616, W001° 04.850
  /* ------------------- coordinate projection ---------------- */
  mark(state->proj_lat, pos1_ok && dist1_ok && dir1_ok);
  if(mark(state->proj_lon, pos1_ok && dist1_ok && dir1_ok)) {
    pos_t pro;

    /* get great circle radius in miles/kilometers */
    float gcrad = state->appdata->imperial?3959.0:6371.0;

    // from: http://www.movable-type.co.uk/scripts/latlong.html
    pro.lat = asin(sin(pos1.lat/180*M_PI) * cos(dist1/gcrad) + 
                   cos(pos1.lat/180*M_PI) * sin(dist1/gcrad) * 
                   cos(dir1/180*M_PI) )/M_PI*180;
    pro.lon = pos1.lon + atan2(sin(dir1/180*M_PI)*sin(dist1/gcrad)*
                               cos(pos1.lat/180*M_PI), 
                               cos(dist1/gcrad)-sin(pos1.lat/180*M_PI)*
                               sin(pro.lat/180*M_PI))/M_PI*180;
    pro.lon = fmodf(pro.lon+180,360) - 180;  // normalise to -180...+180

    lat_label_set(state->proj_lat, pro.lat);
    lon_label_set(state->proj_lon, pro.lon);

    if(!isnan(pro.lat) && !isnan(pro.lon)) 
      state->appdata->geomath = pro;
  } else {
    gtk_label_set_text(GTK_LABEL(state->proj_lat), STR_NAN);
    gtk_label_set_text(GTK_LABEL(state->proj_lon), STR_NAN);
  }
}

void geomath_dialog(appdata_t *appdata) {
  static pos_t pos1 = { 0.0, 0.0 }, pos2 = { 0.0, 0.0 };
  static float dist1 = 0.0;
  static float dir1 = 0.0;
  static gboolean is_imperial = FALSE;

  math_dialog_state_t state;

  /* this is quite ugly. It would be nice to run the entire system on */
  /* one specific system (e.g. metric) and only convert for in- and output */
  if(!appdata->imperial && is_imperial)
    dist1 *= 6371.0/3959.0;   /* we just switched to metric */
  if(appdata->imperial && !is_imperial)
    dist1 *= 3959.0/6371.0;   /* we just switched to imperial */
  is_imperial = appdata->imperial;

  state.appdata = appdata;

#ifdef USE_MAEMO
  if(appdata->cur_cache) 
    printf("current cache is %s\n", appdata->cur_cache->id);
  else
    printf("no current cache\n");
#endif

  GtkWidget *dialog = gtk_dialog_new_with_buttons(_("Geomath"),
                          GTK_WINDOW(appdata->window),
                          //      GTK_DIALOG_NO_SEPARATOR | 
                          GTK_DIALOG_MODAL | GTK_DIALOG_DESTROY_WITH_PARENT,
                          GTK_STOCK_CLOSE, GTK_RESPONSE_CLOSE,
                          NULL);

#if defined(USE_MAEMO) && defined(HILDON_HELP)
  hildon_help_dialog_help_enable(GTK_DIALOG(dialog), HELP_ID_GEOMATH, 
                                 appdata->osso_context);
#endif

  gtk_window_set_default_size(GTK_WINDOW(dialog), DIALOG_WIDTH, DIALOG_HEIGHT);

  /* do geomath dialog */
  GtkWidget *hbox = gtk_hbox_new(FALSE, 0);

  /* ------------------------- input area ------------------------- */
  GtkWidget *table = gtk_table_new(5, 5, FALSE);
  gtk_table_set_col_spacing(GTK_TABLE(table), 2, 20);

  gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Latitude:")),              0, 1, 1, 2);
  gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Longitude:")),             0, 1, 2, 3);

  gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Coordinate 1")),           1, 3, 0, 1);
  gtk_table_attach_defaults(GTK_TABLE(table), state.lat1 = lat_entry_new(pos1.lat),        1, 2, 1, 2);
  gtk_table_attach_defaults(GTK_TABLE(table), state.lon1 = lon_entry_new(pos1.lon),        1, 2, 2, 3);
  gtk_table_attach_defaults(GTK_TABLE(table), preset_coordinate_picker(appdata, state.lat1, state.lon1),  2, 3, 1, 2);

  gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Coordinate 2")),           3, 5, 0, 1);
  gtk_table_attach_defaults(GTK_TABLE(table), state.lat2 = lat_entry_new(pos2.lat),        3, 4, 1, 2);
  gtk_table_attach_defaults(GTK_TABLE(table), state.lon2 = lon_entry_new(pos2.lon),        3, 4, 2, 3);
  gtk_table_attach_defaults(GTK_TABLE(table), preset_coordinate_picker(appdata, state.lat2, state.lon2),  4, 5, 1, 2);

  gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Distance:")),              0, 1, 3, 4);
  gtk_table_attach_defaults(GTK_TABLE(table), state.dist1 = dist_entry_new(dist1, appdata->imperial), 1, 3, 3, 4);

  gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Direction:")),             0, 1, 4, 5);
  gtk_table_attach_defaults(GTK_TABLE(table), state.dir1 = gtk_dir_entry_new(dir1),        1, 3, 4, 5);

  gtk_box_pack_start(GTK_BOX(hbox), table, TRUE, TRUE, 0);

  gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), hbox, TRUE, TRUE, 0);

  /* ------------------------- do-it-button ------------------------- */

  GtkWidget *button = gtk_button_new_with_label(_("Calculate!"));
  g_signal_connect(button, "clicked", (GCallback)on_calc_clicked, &state);

#if defined(USE_MAEMO) && (MAEMO_VERSION_MAJOR == 5)
  hildon_gtk_widget_set_theme_size(button, 
                   (HILDON_SIZE_FINGER_HEIGHT | HILDON_SIZE_AUTO_WIDTH));
  gtk_table_attach(GTK_TABLE(table), button, 3,5,3,5, GTK_EXPAND, GTK_EXPAND, 0, 0);
#else
  /* in non-maemo5 the button has its own row */
  hbox = gtk_hbox_new(FALSE, 0);
  gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, FALSE, 0);
  gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), hbox, TRUE, FALSE, 0);
#endif  

  /* ------------------------- output area ------------------------- */
  
  table = gtk_table_new(3, 3, FALSE);

  gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Distance = ")),
                            0, 1, 0, 1);
  gtk_table_attach_defaults(GTK_TABLE(table), state.distance = gtk_red_label_new(STR_NAN),
                            1, 3, 0, 1);

  gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Projection = ")),
                            0, 1, 1, 2);
  gtk_table_attach_defaults(GTK_TABLE(table), state.proj_lat = gtk_red_label_new(STR_NAN),
                            1, 2, 1, 2);
  gtk_table_attach_defaults(GTK_TABLE(table), state.proj_lon = gtk_red_label_new(STR_NAN),
                            2, 3, 1, 2);
#if 0
  gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Middle = ")),
                            0, 1, 2, 3);
  gtk_table_attach_defaults(GTK_TABLE(table), state.middle_lat = gtk_red_label_new(STR_NAN),
                            1, 2, 2, 3);
  gtk_table_attach_defaults(GTK_TABLE(table), state.middle_lon = gtk_red_label_new(STR_NAN),
                            2, 3, 2, 3);
#endif

  gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), table, TRUE, TRUE, 0);
  

  gtk_dialog_set_default_response(GTK_DIALOG(dialog), GTK_RESPONSE_CLOSE);

  gtk_widget_show_all(dialog);
  gtk_dialog_run(GTK_DIALOG(dialog));

  /* copy values back to local static variables so they re-appear if */
  /* the dialog is re-opened, convert illegal values (NAN) to 0 */

  pos1.lat = lat_entry_get(state.lat1); if(isnan(pos1.lat)) pos1.lat=0; 
  pos1.lon = lon_entry_get(state.lon1); if(isnan(pos1.lon)) pos1.lon=0; 
  pos2.lat = lat_entry_get(state.lat2); if(isnan(pos2.lat)) pos2.lat=0; 
  pos2.lon = lon_entry_get(state.lon2); if(isnan(pos2.lon)) pos2.lon=0; 
  dist1 = distance_eval(state.dist1, &state); if(isnan(dist1)) dist1=0; 
  dir1 = direction_eval(state.dir1); if(isnan(dir1)) dir1=0; 

  gtk_widget_destroy(dialog);
}
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 "gpxview.h"
21			#include <math.h>
22
23	harbaum	198	#if defined(USE_MAEMO) && (MAEMO_VERSION_MAJOR >= 5)
24			#include <hildon/hildon-entry.h>
25			#endif
26
27	harbaum	1	#define STR_NAN "----"
28
29			typedef struct {
30			appdata_t *appdata;
31
32			GtkWidget lon1, lat1, dist1, dir1;
33			GtkWidget lon2, lat2;
34
35			GtkWidget distance, proj_lat, *proj_lon;
36			GtkWidget middle_lat, middle_lon;
37			} math_dialog_state_t;
38
39			static gboolean mark(GtkWidget *widget, gboolean valid) {
40			gtk_widget_set_state(widget, valid?GTK_STATE_NORMAL:TAG_STATE);
41			return valid;
42			}
43
44			/* a entry that is colored red when being "active" */
45			static GtkWidget *gtk_red_entry_new(void) {
46			GdkColor color;
47	harbaum	212	GtkWidget *widget = entry_new();
48	harbaum	1	gdk_color_parse("#ff0000", &color);
49			gtk_widget_modify_text(widget, TAG_STATE, &color);
50			return widget;
51			}
52
53			/* a label that is colored red when being "active" */
54			static GtkWidget gtk_red_label_new(char str) {
55			GdkColor color;
56	harbaum	198	GtkWidget *widget = left_label_new(str);
57	harbaum	1	gdk_color_parse("#ff0000", &color);
58			gtk_widget_modify_fg(widget, TAG_STATE, &color);
59			return widget;
60			}
61
62			static GtkWidget *gtk_dir_entry_new(float val) {
63			char str[16];
64			GtkWidget *w = gtk_red_entry_new();
65
66			snprintf(str, sizeof(str), _("%.1f°"), val);
67			gtk_entry_set_text(GTK_ENTRY(w), str);
68
69			return w;
70			}
71
72			float pos_lat_eval_combo(GtkWidget *widget) {
73			char p = (char)gtk_combo_box_get_active_text(GTK_COMBO_BOX(widget));
74			float val = pos_parse_lat(p);
75			mark(widget, !isnan(val));
76
77			return val;
78			}
79
80			static float distance_eval(GtkWidget widget, math_dialog_state_t state) {
81			char p = (char)gtk_entry_get_text(GTK_ENTRY(widget));
82			float val = distance_parse(p, state->appdata->imperial);
83			mark(widget, !isnan(val));
84
85			return val;
86			}
87
88			float direction_eval(GtkWidget *widget) {
89			char p = (char)gtk_entry_get_text(GTK_ENTRY(widget));
90			float val;
91			if(sscanf(p, _("%f°"), &val) != 1)
92			val = NAN;
93
94			mark(widget, !isnan(val));
95
96			return val;
97			}
98
99			static void on_calc_clicked(GtkButton *button, gpointer user_data) {
100			math_dialog_state_t state = (math_dialog_state_t)user_data;
101			pos_t pos1, pos2;
102			gboolean pos1_ok = FALSE, pos2_ok = FALSE;
103			float dist1;
104			gboolean dist1_ok = FALSE;
105			float dir1;
106			gboolean dir1_ok = FALSE;
107
108			/* parse input */
109	harbaum	221	pos1.lat = lat_entry_get(state->lat1);
110			pos1.lon = lon_entry_get(state->lon1);
111	harbaum	1	if(!isnan(pos1.lat) && !isnan(pos1.lon)) pos1_ok = TRUE;
112
113	harbaum	221	pos2.lat = lat_entry_get(state->lat2);
114			pos2.lon = lon_entry_get(state->lon2);
115	harbaum	1	if(!isnan(pos2.lat) && !isnan(pos2.lon)) pos2_ok = TRUE;
116
117			dist1 = distance_eval(state->dist1, state);
118			if(!isnan(dist1)) dist1_ok = TRUE;
119
120			dir1 = direction_eval(state->dir1);
121			if(!isnan(dir1)) dir1_ok = TRUE;
122
123			/* ------------------- do all calculations ------------------- */
124
125
126			/* ------------------- distance of coo1 and coo2 ------------------- */
127			if(mark(state->distance, pos1_ok && pos2_ok)) {
128			char str[32];
129			float dist = gpx_pos_get_distance(pos1, pos2, state->appdata->imperial);
130			distance_str(str, sizeof(str), dist, state->appdata->imperial);
131
132			gtk_label_set_text(GTK_LABEL(state->distance), str);
133			} else
134			gtk_label_set_text(GTK_LABEL(state->distance), STR_NAN);
135
136			// N 53° 09.033' W 001° 50.666' 100km / 30° = N 53° 55.616, W001° 04.850
137			/* ------------------- coordinate projection ---------------- */
138			mark(state->proj_lat, pos1_ok && dist1_ok && dir1_ok);
139			if(mark(state->proj_lon, pos1_ok && dist1_ok && dir1_ok)) {
140			pos_t pro;
141
142			/* get great circle radius in miles/kilometers */
143			float gcrad = state->appdata->imperial?3959.0:6371.0;
144
145			// from: http://www.movable-type.co.uk/scripts/latlong.html
146			pro.lat = asin(sin(pos1.lat/180M_PI) cos(dist1/gcrad) +
147			cos(pos1.lat/180M_PI) sin(dist1/gcrad) *
148			cos(dir1/180M_PI) )/M_PI180;
149			pro.lon = pos1.lon + atan2(sin(dir1/180M_PI)sin(dist1/gcrad)*
150			cos(pos1.lat/180*M_PI),
151			cos(dist1/gcrad)-sin(pos1.lat/180M_PI)
152			sin(pro.lat/180M_PI))/M_PI180;
153			pro.lon = fmodf(pro.lon+180,360) - 180; // normalise to -180...+180
154
155	harbaum	221	lat_label_set(state->proj_lat, pro.lat);
156			lon_label_set(state->proj_lon, pro.lon);
157	harbaum	1
158			if(!isnan(pro.lat) && !isnan(pro.lon))
159			state->appdata->geomath = pro;
160			} else {
161			gtk_label_set_text(GTK_LABEL(state->proj_lat), STR_NAN);
162			gtk_label_set_text(GTK_LABEL(state->proj_lon), STR_NAN);
163			}
164			}
165
166			void geomath_dialog(appdata_t *appdata) {
167			static pos_t pos1 = { 0.0, 0.0 }, pos2 = { 0.0, 0.0 };
168			static float dist1 = 0.0;
169			static float dir1 = 0.0;
170			static gboolean is_imperial = FALSE;
171
172			math_dialog_state_t state;
173
174			/* this is quite ugly. It would be nice to run the entire system on */
175			/* one specific system (e.g. metric) and only convert for in- and output */
176			if(!appdata->imperial && is_imperial)
177			dist1 = 6371.0/3959.0; / we just switched to metric */
178			if(appdata->imperial && !is_imperial)
179			dist1 = 3959.0/6371.0; / we just switched to imperial */
180			is_imperial = appdata->imperial;
181
182			state.appdata = appdata;
183
184			#ifdef USE_MAEMO
185			if(appdata->cur_cache)
186			printf("current cache is %s\n", appdata->cur_cache->id);
187			else
188			printf("no current cache\n");
189			#endif
190
191			GtkWidget *dialog = gtk_dialog_new_with_buttons(_("Geomath"),
192			GTK_WINDOW(appdata->window),
193			// GTK_DIALOG_NO_SEPARATOR \|
194			GTK_DIALOG_MODAL \| GTK_DIALOG_DESTROY_WITH_PARENT,
195			GTK_STOCK_CLOSE, GTK_RESPONSE_CLOSE,
196			NULL);
197
198			#if defined(USE_MAEMO) && defined(HILDON_HELP)
199			hildon_help_dialog_help_enable(GTK_DIALOG(dialog), HELP_ID_GEOMATH,
200			appdata->osso_context);
201			#endif
202
203			gtk_window_set_default_size(GTK_WINDOW(dialog), DIALOG_WIDTH, DIALOG_HEIGHT);
204
205			/* do geomath dialog */
206			GtkWidget *hbox = gtk_hbox_new(FALSE, 0);
207
208			/* ------------------------- input area ------------------------- */
209	harbaum	214	GtkWidget *table = gtk_table_new(5, 5, FALSE);
210			gtk_table_set_col_spacing(GTK_TABLE(table), 2, 20);
211	harbaum	1
212	harbaum	214	gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Latitude:")), 0, 1, 1, 2);
213			gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Longitude:")), 0, 1, 2, 3);
214	harbaum	1
215	harbaum	214	gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Coordinate 1")), 1, 3, 0, 1);
216			gtk_table_attach_defaults(GTK_TABLE(table), state.lat1 = lat_entry_new(pos1.lat), 1, 2, 1, 2);
217			gtk_table_attach_defaults(GTK_TABLE(table), state.lon1 = lon_entry_new(pos1.lon), 1, 2, 2, 3);
218	harbaum	221	gtk_table_attach_defaults(GTK_TABLE(table), preset_coordinate_picker(appdata, state.lat1, state.lon1), 2, 3, 1, 2);
219	harbaum	1
220	harbaum	214	gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Coordinate 2")), 3, 5, 0, 1);
221			gtk_table_attach_defaults(GTK_TABLE(table), state.lat2 = lat_entry_new(pos2.lat), 3, 4, 1, 2);
222			gtk_table_attach_defaults(GTK_TABLE(table), state.lon2 = lon_entry_new(pos2.lon), 3, 4, 2, 3);
223	harbaum	221	gtk_table_attach_defaults(GTK_TABLE(table), preset_coordinate_picker(appdata, state.lat2, state.lon2), 4, 5, 1, 2);
224	harbaum	1
225	harbaum	198	gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Distance:")), 0, 1, 3, 4);
226	harbaum	214	gtk_table_attach_defaults(GTK_TABLE(table), state.dist1 = dist_entry_new(dist1, appdata->imperial), 1, 3, 3, 4);
227
228	harbaum	198	gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Direction:")), 0, 1, 4, 5);
229	harbaum	214	gtk_table_attach_defaults(GTK_TABLE(table), state.dir1 = gtk_dir_entry_new(dir1), 1, 3, 4, 5);
230	harbaum	1
231			gtk_box_pack_start(GTK_BOX(hbox), table, TRUE, TRUE, 0);
232
233			gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), hbox, TRUE, TRUE, 0);
234
235			/* ------------------------- do-it-button ------------------------- */
236
237			GtkWidget *button = gtk_button_new_with_label(_("Calculate!"));
238	harbaum	198	g_signal_connect(button, "clicked", (GCallback)on_calc_clicked, &state);
239
240	harbaum	133	#if defined(USE_MAEMO) && (MAEMO_VERSION_MAJOR == 5)
241			hildon_gtk_widget_set_theme_size(button,
242			(HILDON_SIZE_FINGER_HEIGHT \| HILDON_SIZE_AUTO_WIDTH));
243	harbaum	214	gtk_table_attach(GTK_TABLE(table), button, 3,5,3,5, GTK_EXPAND, GTK_EXPAND, 0, 0);
244	harbaum	198	#else
245			/* in non-maemo5 the button has its own row */
246			hbox = gtk_hbox_new(FALSE, 0);
247	harbaum	1	gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, FALSE, 0);
248			gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), hbox, TRUE, FALSE, 0);
249	harbaum	198	#endif
250	harbaum	1
251			/* ------------------------- output area ------------------------- */
252
253			table = gtk_table_new(3, 3, FALSE);
254
255	harbaum	198	gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Distance = ")),
256	harbaum	1	0, 1, 0, 1);
257			gtk_table_attach_defaults(GTK_TABLE(table), state.distance = gtk_red_label_new(STR_NAN),
258			1, 3, 0, 1);
259
260	harbaum	198	gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Projection = ")),
261	harbaum	1	0, 1, 1, 2);
262			gtk_table_attach_defaults(GTK_TABLE(table), state.proj_lat = gtk_red_label_new(STR_NAN),
263			1, 2, 1, 2);
264			gtk_table_attach_defaults(GTK_TABLE(table), state.proj_lon = gtk_red_label_new(STR_NAN),
265			2, 3, 1, 2);
266			#if 0
267	harbaum	198	gtk_table_attach_defaults(GTK_TABLE(table), left_label_new(_("Middle = ")),
268	harbaum	1	0, 1, 2, 3);
269			gtk_table_attach_defaults(GTK_TABLE(table), state.middle_lat = gtk_red_label_new(STR_NAN),
270			1, 2, 2, 3);
271			gtk_table_attach_defaults(GTK_TABLE(table), state.middle_lon = gtk_red_label_new(STR_NAN),
272			2, 3, 2, 3);
273			#endif
274
275			gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), table, TRUE, TRUE, 0);
276
277
278			gtk_dialog_set_default_response(GTK_DIALOG(dialog), GTK_RESPONSE_CLOSE);
279
280			gtk_widget_show_all(dialog);
281			gtk_dialog_run(GTK_DIALOG(dialog));
282
283			/* copy values back to local static variables so they re-appear if */
284			/* the dialog is re-opened, convert illegal values (NAN) to 0 */
285
286	harbaum	221	pos1.lat = lat_entry_get(state.lat1); if(isnan(pos1.lat)) pos1.lat=0;
287			pos1.lon = lon_entry_get(state.lon1); if(isnan(pos1.lon)) pos1.lon=0;
288			pos2.lat = lat_entry_get(state.lat2); if(isnan(pos2.lat)) pos2.lat=0;
289			pos2.lon = lon_entry_get(state.lon2); if(isnan(pos2.lon)) pos2.lon=0;
290	harbaum	1	dist1 = distance_eval(state.dist1, &state); if(isnan(dist1)) dist1=0;
291			dir1 = direction_eval(state.dir1); if(isnan(dir1)) dir1=0;
292
293			gtk_widget_destroy(dialog);
294			}