Map: show multiple selected dive sites

If multiple dives are selected, highlight all corresponding sites.
For that, replace the MapLocationModel::m_selectedDs pointer by
a QVector<>. Fill the vector in MapLocationModel::reload() and
add a isSelected() member function.

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

map-widget/qml/MapWidget.qml

@@ -56,17 +56,17 @@ Item {
 				anchorPoint.x: 0
 				anchorPoint.y: mapItemImage.height
 				coordinate:  model.coordinate
-				z: mapHelper.model.selectedDs === model.divesite ? mapHelper.model.count - 1 : 0
+				z: mapHelper.model.isSelected(model.divesite) ? mapHelper.model.count - 1 : 0
 				sourceItem: Image {
 					id: mapItemImage
-					source: "qrc:///dive-location-marker" + (mapHelper.model.selectedDs === model.divesite ? "-selected" : (mapHelper.editMode ? "-inactive" : "")) + "-icon"
+					source: "qrc:///dive-location-marker" + (mapHelper.model.isSelected(model.divesite) ? "-selected" : (mapHelper.editMode ? "-inactive" : "")) + "-icon"
 					SequentialAnimation {
 						id: mapItemImageAnimation
 						PropertyAnimation { target: mapItemImage; property: "scale"; from: 1.0; to: 0.7; duration: 120 }
 						PropertyAnimation { target: mapItemImage; property: "scale"; from: 0.7; to: 1.0; duration: 80 }
 					}
 					MouseArea {
-						drag.target: (mapHelper.editMode && mapHelper.model.selectedDs === model.divesite) ? mapItem : undefined
+						drag.target: (mapHelper.editMode && mapHelper.model.isSelected(model.divesite)) ? mapItem : undefined
 						anchors.fill: parent
 						onClicked: {
 							if (!mapHelper.editMode)
@@ -74,8 +74,8 @@ Item {
 						}
 						onDoubleClicked: map.doubleClickHandler(mapItem.coordinate)
 						onReleased: {
-							if (mapHelper.editMode && mapHelper.model.selectedDs === model.divesite) {
+							if (mapHelper.editMode && mapHelper.model.isSelected(model.divesite)) {
-								mapHelper.updateCurrentDiveSiteCoordinatesFromMap(mapHelper.model.selectedDs, mapItem.coordinate)
+								mapHelper.updateCurrentDiveSiteCoordinatesFromMap(model.divesite, mapItem.coordinate)
 							}
 						}
 					}
@@ -94,7 +94,7 @@ Item {
 							id: mapItemText
 							text: model.name
 							font.pointSize: 11.0
-							color: mapHelper.model.selectedDs === model.divesite ? "white" : "lightgrey"
+							color: mapHelper.model.isSelected(model.divesite) ? "white" : "lightgrey"
 						}
 					}
 				}

qt-models/maplocationmodel.cpp

@@ -61,8 +61,7 @@ QVariant MapLocation::divesiteVariant()
 	return QVariant::fromValue(m_ds);
 }
 
-MapLocationModel::MapLocationModel(QObject *parent) : QAbstractListModel(parent),
+MapLocationModel::MapLocationModel(QObject *parent) : QAbstractListModel(parent)
-	m_selectedDs(nullptr)
 {
 	m_roles[MapLocation::Roles::RoleDivesite] = MapLocation::PROPERTY_NAME_DIVESITE;
 	m_roles[MapLocation::Roles::RoleCoordinate] = MapLocation::PROPERTY_NAME_COORDINATE;
@@ -120,6 +119,7 @@ void MapLocationModel::reload()
 
 	qDeleteAll(m_mapLocations);
 	m_mapLocations.clear();
+	m_selectedDs.clear();
 
 	QMap<QString, MapLocation *> locationNameMap;
 	MapLocation *location;
@@ -140,7 +140,11 @@ void MapLocationModel::reload()
 		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))
+		if (!dive_site_has_gps_location(ds))
+			continue;
+		if (dive->selected && !m_selectedDs.contains(ds))
+			m_selectedDs.append(ds);
+		if (locations.contains(ds))
 			continue;
 		latitude = ds->location.lat.udeg * 0.000001;
 		longitude = ds->location.lon.udeg * 0.000001;
@@ -165,15 +169,16 @@ void MapLocationModel::reload()
 
 void MapLocationModel::setSelected(struct dive_site *ds, bool fromClick)
 {
-	m_selectedDs = ds;
+	m_selectedDs.clear();
-	emit selectedDsChanged();
+	m_selectedDs.append(ds);
 	if (fromClick)
-		emit selectedLocationChanged(getMapLocation(m_selectedDs));
+		emit selectedLocationChanged(getMapLocation(ds));
 }
 
-QVariant MapLocationModel::selectedDs()
+bool MapLocationModel::isSelected(const QVariant &dsVariant) const
 {
-	return QVariant::fromValue(m_selectedDs);
+	dive_site *ds = dsVariant.value<dive_site *>();
+	return ds && m_selectedDs.contains(ds);
 }
 
 MapLocation *MapLocationModel::getMapLocation(const struct dive_site *ds)

qt-models/maplocationmodel.h

@@ -50,7 +50,6 @@ class MapLocationModel : public QAbstractListModel
 {
 	Q_OBJECT
 	Q_PROPERTY(int count READ count NOTIFY countChanged)
-	Q_PROPERTY(QVariant selectedDs READ selectedDs NOTIFY selectedDsChanged)
 
 public:
 	MapLocationModel(QObject *parent = NULL);
@@ -65,7 +64,9 @@ public:
 	MapLocation *getMapLocation(const struct dive_site *ds);
 	void updateMapLocationCoordinates(const struct dive_site *ds, QGeoCoordinate coord);
 	Q_INVOKABLE void setSelected(struct dive_site *ds, bool fromClick = true);
-	QVariant selectedDs();
+	// The dive site is passed as a QVariant, because a null-QVariant is not automatically
+	// transformed into a null pointer and warning messages are spewed onto the console.
+	Q_INVOKABLE bool isSelected(const QVariant &ds) const;
 
 protected:
 	QHash<int, QByteArray> roleNames() const override;
@@ -73,11 +74,10 @@ protected:
 private:
 	QVector<MapLocation *> m_mapLocations;
 	QHash<int, QByteArray> m_roles;
-	struct dive_site *m_selectedDs;
+	QVector<dive_site *> m_selectedDs;
 
 signals:
 	void countChanged(int c);
-	void selectedDsChanged();
 	void selectedLocationChanged(MapLocation *);
 };