Undo: keep frontend informed of changes to dive site count

Add a new signal to DiveListNotifier. Send signal if dives are
added or removed and therefore the dive count of a dive site
changes. The dive sites are collected and the signal is sent
at the end of the command.

Add code to update the table view.

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

2 files changed, 13 insertions, 0 deletions

diff --git a/qt-models/divelocationmodel.cpp b/qt-models/divelocationmodel.cpp
index b9bf5702b..03c07a5e0 100644
--- a/qt-models/divelocationmodel.cpp
+++ b/qt-models/divelocationmodel.cpp
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "core/units.h"
 #include "qt-models/divelocationmodel.h"
+#include "core/subsurface-qt/DiveListNotifier.h"
 #include "core/qthelper.h"
 #include "core/divesite.h"
 #include "core/metrics.h"
@@ -23,6 +24,7 @@ LocationInformationModel *LocationInformationModel::instance()
 
 LocationInformationModel::LocationInformationModel(QObject *obj) : QAbstractTableModel(obj)
 {
+	connect(&diveListNotifier, &DiveListNotifier::diveSiteDiveCountChanged, this, &LocationInformationModel::diveSiteDiveCountChanged);
 }
 
 int LocationInformationModel::columnCount(const QModelIndex &) const
@@ -154,6 +156,13 @@ bool LocationInformationModel::removeRows(int row, int, const QModelIndex&)
 	return true;
 }
 
+void LocationInformationModel::diveSiteDiveCountChanged(dive_site *ds)
+{
+	int idx = get_divesite_idx(ds, &dive_site_table);
+	if (idx >= 0)
+		dataChanged(createIndex(idx, NUM_DIVES), createIndex(idx, NUM_DIVES));
+}
+
 GeoReferencingOptionsModel *GeoReferencingOptionsModel::instance()
 {
 	static GeoReferencingOptionsModel *self = new GeoReferencingOptionsModel();
diff --git a/qt-models/divelocationmodel.h b/qt-models/divelocationmodel.h
index 4840bff21..794056324 100644
--- a/qt-models/divelocationmodel.h
+++ b/qt-models/divelocationmodel.h
@@ -9,6 +9,9 @@
 
 #define RECENTLY_ADDED_DIVESITE ((struct dive_site *)~0)
 
+struct dive;
+struct dive_trip;
+
 class LocationInformationModel : public QAbstractTableModel {
 Q_OBJECT
 public:
@@ -30,6 +33,7 @@ public:
 public slots:
 	void update();
 	QStringList allSiteNames() const;
+	void diveSiteDiveCountChanged(struct dive_site *ds);
 private:
 	QStringList locationNames;
 };