Map: show all dive sites when in dive-site filter mode

When on the dive site tab or editing a dive site, we want
to show all dive sites so that the user can related different
dive sites. Therefore export a "in dive site mode" flag from
the filter model and don't filter in that case in MapWidgetHelper.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

map-widget/qmlmapwidgethelper.cpp

@@ -8,6 +8,9 @@
 #include "core/divesite.h"
 #include "core/qthelper.h"
 #include "qt-models/maplocationmodel.h"
+#ifndef SUBSURFACE_MOBILE
+#include "qt-models/filtermodels.h"
+#endif
 
 #define MIN_DISTANCE_BETWEEN_DIVE_SITES_M 50.0
 #define SMALL_CIRCLE_RADIUS_PX            26.0
@@ -114,10 +117,18 @@ void MapWidgetHelper::reloadMapLocations()
 	QVector<struct dive_site *> locations;
 	qreal latitude, longitude;
 
+#ifdef SUBSURFACE_MOBILE
+	bool diveSiteMode = false;
+#else
+	// In dive site mode (that is when either editing a dive site or on
+	// the dive site tab), we want to show all dive sites, not only those
+	// of the non-hidden dives.
+	bool diveSiteMode = MultiFilterSortModel::instance()->diveSiteMode();
+#endif
 	for_each_dive(idx, dive) {
 		// Don't show dive sites of hidden dives, unless this is the currently
-		// displayed (edited) dive.
-		if (dive->hidden_by_filter && dive != current_dive)
+		// displayed (edited) dive or we're in dive site edit mode.
+		if (!diveSiteMode && dive->hidden_by_filter && dive != current_dive)
 			continue;
 		struct dive_site *ds = get_dive_site_for_dive(dive);
 		if (!dive_site_has_gps_location(ds) || locations.contains(ds))

qt-models/filtermodels.cpp

@@ -278,6 +278,11 @@ void MultiFilterSortModel::stopFilterDiveSites()
 	myInvalidate();
 }
 
+bool MultiFilterSortModel::diveSiteMode() const
+{
+	return !dive_sites.isEmpty();
+}
+
 bool MultiFilterSortModel::lessThan(const QModelIndex &i1, const QModelIndex &i2) const
 {
 	// Hand sorting down to the source model.

qt-models/filtermodels.h

@@ -63,6 +63,7 @@ public:
 	bool updateDive(struct dive *d); // returns true if visibility status changed
 	int divesDisplayed;
 	bool lessThan(const QModelIndex &, const QModelIndex &) const override;
+	bool diveSiteMode() const; // returns true if we're filtering on dive site
 public
 slots:
 	void myInvalidate();