desktop: disable animation when selecting multiple dives

Selecting many dives when the animation was active
was increadibly slow, so disable it.

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

CHANGELOG.md

@@ -1,3 +1,4 @@
+- desktop: make selection of multiple dives reasonable fast
 - mobile: add GF fields to adjust Buhlmann algorithm parameters for calculated ceiling
 - undo: save to git after editing weights [#3159]
 - undo: reset dive-mode on undo of set-point addition

desktop-widgets/divelistview.cpp

@@ -248,11 +248,16 @@ void DiveListView::diveSelectionChanged(const QVector<QModelIndex> &indices)
 		if (std::find(affectedTrips.begin(), affectedTrips.end(), row) == affectedTrips.end())
 			affectedTrips.push_back(row);
 	}
+	// Disable animations when expanding trips. Otherwise, selection of
+	// a large number of dives becomes increadibly slow.
+	bool oldAnimated = isAnimated();
+	setAnimated(false);
 	MultiFilterSortModel *m = MultiFilterSortModel::instance();
 	for (int row: affectedTrips) {
 		QModelIndex idx = m->index(row, 0);
 		expand(idx);
 	}
+	setAnimated(oldAnimated);
 
 	selectionChangeDone();
 	programmaticalSelectionChange = false;