Inform LocationFilterModel of changed dive site name

Since commit 01d961086c1d175732c597dc9acdba7cc4cd2d26, the location filter
list is updated if a dive site is edited. The problem is that if the
name of a selected dive site is changed, the selection is lost.

Therefore, before repopulating, inform the location filter that a dive
site changed its name. The location filter then internally changes the
name and can properly transfer the old selection on repopulate. This is
performed via the new LocationInformationWidget::nameChanged signal,
which is connected to the new LocationFilterModel::changeName slot.

A special case to be handled is the following:
 [ ] Site 1
 [x] Site 2
and "Site 2" being renamed to "Site 1", i.e. both sites being merged.
Here, the merging is detected and "Site 1" will likewise be checked:
 [x] Site 1
 [x] Site 1
No merging is performed, as the list will be repopulated anyway.

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

2 files changed, 19 insertions, 0 deletions

diff --git a/qt-models/filtermodels.cpp b/qt-models/filtermodels.cpp
index 51587edc8..568fcd9e2 100644
--- a/qt-models/filtermodels.cpp
+++ b/qt-models/filtermodels.cpp
@@ -315,6 +315,24 @@ void LocationFilterModel::repopulate()
 	updateList(list);
 }
 
+void LocationFilterModel::changeName(const QString &oldName, const QString &newName)
+{
+	if (oldName.isEmpty() || newName.isEmpty() || oldName == newName)
+		return;
+	QStringList list = stringList();
+	int oldIndex = list.indexOf(oldName);
+	if (oldIndex < 0)
+		return;
+	int newIndex = list.indexOf(newName);
+	list[oldIndex] = newName;
+	setStringList(list);
+
+	// If there was already an entry with the new name, we are merging entries.
+	// Thus, if the old entry was selected, also select the new entry.
+	if (newIndex >= 0 && checkState[oldIndex])
+		checkState[newIndex] = true;
+}
+
 MultiFilterSortModel::MultiFilterSortModel(QObject *parent) :
 	QSortFilterProxyModel(parent),
 	divesDisplayed(0),
diff --git a/qt-models/filtermodels.h b/qt-models/filtermodels.h
index 3060f7cf3..45f820984 100644
--- a/qt-models/filtermodels.h
+++ b/qt-models/filtermodels.h
@@ -68,6 +68,7 @@ public:
 public
 slots:
 	void repopulate();
+	void changeName(const QString &oldName, const QString &newName);
 
 private:
 	explicit LocationFilterModel(QObject *parent = 0);