+ RegionList audio;
+ RegionList midi;
+ int aret;
+
+ begin_reversible_command (_("stretch/shrink"));
+
+ for (RegionSelection::iterator i = regions.begin(); i != regions.end(); ++i) {
+ if ((*i)->region()->data_type() == DataType::AUDIO) {
+ audio.push_back ((*i)->region());
+ } else if ((*i)->region()->data_type() == DataType::MIDI) {
+ midi.push_back ((*i)->region());
+ }
+ }
+
+ if ((aret = time_fx (audio, fraction, false)) != 0) {
+ return aret;
+ }
+
+ set<boost::shared_ptr<Playlist> > midi_playlists_affected;
+
+ for (RegionList::iterator i = midi.begin(); i != midi.end(); ++i) {
+ boost::shared_ptr<Playlist> playlist = (*i)->playlist();
+
+ if (playlist) {
+ playlist->clear_changes ();
+ }
+
+ }
+
+ ARDOUR::TimeFXRequest request;
+ request.time_fraction = fraction;
+
+ for (RegionList::iterator i = midi.begin(); i != midi.end(); ++i) {
+ boost::shared_ptr<Playlist> playlist = (*i)->playlist();
+
+ if (!playlist) {
+ continue;
+ }
+
+ MidiStretch stretch (*_session, request);
+ stretch.run (*i);