Add support for visibility tracking and allow manual entry air temp

Turns out we had a data field for visibility as a length unit - but never
used it. I can never guess how much visibility we actually had on a dive -
but I think most everyone can assign a rating between abysmal (zero stars,
"I couldn't read my dive computer even right in front of my mask" - trust
me, I had some of those dives) to amazing ("five stars, I could see farther
than I though possible" - and I had one or two of those, too). So I
changed this to an integer and am re-using the star infrastructure we have
for the overall dive rating.

When displaying this I was dismayed that we are running out of space in
the "Dive Notes" notbook. So I moved this to the "Dive Info" notebook.
This is not consistent and not logical. I think we need to revisit the
notebooks and think about what we want to display where.

While adding the infrastructure to manually enter the visibility I went
ahead and added the ability to manually enter the air temperature as well
(that was one of the things missing in the previous commit).

Fixes #7

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

dive.h

@@ -267,7 +267,7 @@ struct dive {
 	double latitude, longitude;
 	depth_t maxdepth, meandepth;
 	duration_t duration, surfacetime;
-	depth_t visibility;
+	int visibility; /* 0 - 5 star rating */
 	temperature_t airtemp, watertemp;
 	cylinder_t cylinder[MAX_CYLINDERS];
 	weightsystem_t weightsystem[MAX_WEIGHTSYSTEMS];

info.c

@@ -238,6 +238,19 @@ static GtkEntry *text_value(GtkWidget *box, const char *label)
 	return GTK_ENTRY(widget);
 }
 
+static GtkEntry *single_text_entry(GtkWidget *box, const char *label, const char *text)
+{
+	GtkEntry *entry;
+	GtkWidget *frame = gtk_frame_new(label);
+
+	gtk_box_pack_start(GTK_BOX(box), frame, FALSE, TRUE, 0);
+	entry = GTK_ENTRY(gtk_entry_new());
+	gtk_container_add(GTK_CONTAINER(frame), GTK_WIDGET(entry));
+	if (text && *text)
+		gtk_entry_set_text(entry, text);
+	return entry;
+}
+
 static GtkComboBoxEntry *text_entry(GtkWidget *box, const char *label, GtkListStore *completions, const char *text)
 {
 	GtkEntry *entry;
@@ -387,7 +400,8 @@ static int get_rating(const char *string)
 }
 
 struct dive_info {
-	GtkComboBoxEntry *location, *divemaster, *buddy, *rating, *suit;
+	GtkComboBoxEntry *location, *divemaster, *buddy, *rating, *suit, *viz;
+	GtkEntry *airtemp;
 	GtkTextView *notes;
 };
 
@@ -395,6 +409,7 @@ static void save_dive_info_changes(struct dive *dive, struct dive *master, struc
 {
 	char *old_text, *new_text;
 	char *rating_string;
+	double newtemp;
 	int changed = 0;
 
 	new_text = get_combo_box_entry_text(info->location, &dive->location, master->location);
@@ -429,6 +444,33 @@ static void save_dive_info_changes(struct dive *dive, struct dive *master, struc
 	}
 	free(rating_string);
 
+	rating_string = strdup(star_strings[dive->visibility]);
+	new_text = get_combo_box_entry_text(info->viz, &rating_string, star_strings[master->visibility]);
+	if (new_text) {
+		dive->visibility = get_rating(rating_string);
+		changed = 1;
+	}
+	free(rating_string);
+
+	new_text = (char *)gtk_entry_get_text(info->airtemp);
+	if(sscanf(new_text, "%lf", &newtemp) == 1) {
+		unsigned long mkelvin;
+		switch (output_units.temperature) {
+		case CELSIUS:
+			mkelvin = C_to_mkelvin(newtemp);
+			break;
+		case FAHRENHEIT:
+			mkelvin = F_to_mkelvin(newtemp);
+			break;
+		default:
+			mkelvin = 0;
+		}
+		if (mkelvin != dive->airtemp.mkelvin) {
+			dive->airtemp.mkelvin = mkelvin;
+			changed = 1;
+		}
+	}
+
 	if (info->notes) {
 		old_text = dive->notes;
 		dive->notes = get_text(info->notes);
@@ -465,6 +507,9 @@ static void dive_info_widget(GtkWidget *box, struct dive *dive, struct dive_info
 {
 	GtkWidget *hbox, *label, *frame, *equipment;
 	char buffer[128];
+	char airtemp[6];
+	const char *unit;
+	double value;
 
 	snprintf(buffer, sizeof(buffer), "%s", _("Edit multiple dives"));
 
@@ -487,6 +532,19 @@ static void dive_info_widget(GtkWidget *box, struct dive *dive, struct dive_info
 	info->rating = text_entry(hbox, _("Rating"), star_list, star_strings[dive->rating]);
 	info->suit = text_entry(hbox, _("Suit"), suit_list, dive->suit);
 
+	hbox = gtk_hbox_new(FALSE, 3);
+	gtk_box_pack_start(GTK_BOX(box), hbox, FALSE, TRUE, 0);
+
+	info->viz = text_entry(hbox, _("Visibility"), star_list, star_strings[dive->visibility]);
+
+	value = get_temp_units(dive->airtemp.mkelvin, &unit);
+	snprintf(buffer, sizeof(buffer), _("Air Temp in %s"), unit);
+	if (dive->airtemp.mkelvin)
+		snprintf(airtemp, sizeof(airtemp), "%.1f", value);
+	else
+		airtemp[0] = '\0';
+	info->airtemp = single_text_entry(hbox, buffer, airtemp);
+
 	/* only show notes if editing a single dive */
 	if (multi) {
 		info->notes = NULL;

parse-xml.c

@@ -1126,6 +1126,8 @@ static void try_to_fill_dive(struct dive **divep, const char *name, char *buf)
 		return;
 	if (MATCH(".rating", get_index, &dive->rating))
 		return;
+	if (MATCH(".visibility", get_index, &dive->visibility))
+		return;
 	if (MATCH(".cylinder.size", cylindersize, &dive->cylinder[cur_cylinder_index].type.size))
 		return;
 	if (MATCH(".cylinder.workpressure", pressure, &dive->cylinder[cur_cylinder_index].type.workingpressure))

save-xml.c

@@ -329,6 +329,8 @@ static void save_dive(FILE *f, struct dive *dive)
 		fprintf(f, " tripflag='%s'", tripflag_names[dive->tripflag]);
 	if (dive->rating)
 		fprintf(f, " rating='%d'", dive->rating);
+	if (dive->visibility)
+		fprintf(f, " visibility='%d'", dive->visibility);
 	fprintf(f, " date='%04u-%02u-%02u'",
 		tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday);
 	fprintf(f, " time='%02u:%02u:%02u'",

statistics.c

@@ -27,6 +27,7 @@ typedef struct {
 		*surf_intv,
 		*max_depth,
 		*avg_depth,
+		*viz,
 		*water_temp,
 		*air_temp,
 		*sac,
@@ -544,6 +545,7 @@ static void show_single_dive_stats(struct dive *dive)
 	set_label(single_w.max_depth, "%.*f %s", decimals, value, unit);
 	value = get_depth_units(dive->meandepth.mm, &decimals, &unit);
 	set_label(single_w.avg_depth, "%.*f %s", decimals, value, unit);
+	set_label(single_w.viz, star_strings[dive->visibility]);
 	if (dive->watertemp.mkelvin) {
 		value = get_temp_units(dive->watertemp.mkelvin, &unit);
 		set_label(single_w.water_temp, "%.1f %s", value, unit);
@@ -733,10 +735,16 @@ GtkWidget *single_stats_widget(void)
 
 	single_w.max_depth = new_info_label_in_frame(hbox, _("Max Depth"));
 	single_w.avg_depth = new_info_label_in_frame(hbox, _("Avg Depth"));
+	single_w.viz = new_info_label_in_frame(hbox, _("Visibility"));
+
+	/* third row */
+	hbox = gtk_hbox_new(FALSE, 3);
+	gtk_box_pack_start(GTK_BOX(framebox), hbox, TRUE, FALSE, 3);
+
 	single_w.water_temp = new_info_label_in_frame(hbox, _("Water Temp"));
 	single_w.air_temp = new_info_label_in_frame(hbox, _("Air Temp"));
 
-	/* third row */
+	/* fourth row */
 	hbox = gtk_hbox_new(FALSE, 3);
 	gtk_box_pack_start(GTK_BOX(framebox), hbox, TRUE, FALSE, 3);
 
@@ -755,6 +763,7 @@ void clear_stats_widgets(void)
 	set_label(single_w.surf_intv, "");
 	set_label(single_w.max_depth, "");
 	set_label(single_w.avg_depth, "");
+	set_label(single_w.viz, "");
 	set_label(single_w.water_temp, "");
 	set_label(single_w.air_temp, "");
 	set_label(single_w.sac, "");