+void ClipList::change_num_cameras(size_t num_cameras)
+{
+ assert(num_cameras >= this->num_cameras);
+ if (num_cameras == this->num_cameras) {
+ return;
+ }
+
+ beginInsertColumns(QModelIndex(), int(Column::NUM_NON_CAMERA_COLUMNS) + this->num_cameras, int(Column::NUM_NON_CAMERA_COLUMNS) + num_cameras - 1);
+ this->num_cameras = num_cameras;
+ endInsertColumns();
+ emit any_content_changed();
+}
+