Add some convenient public editor methods (for lua-bindings)
[ardour.git] / gtk2_ardour / editor_drag.cc
index e4c86f97b1cc35e3926b94f7e90ab086fcf9791c..ff3b03221037f36055fd152c76b31960ef0cf7d8 100644 (file)
@@ -37,6 +37,7 @@
 #include "ardour/midi_region.h"
 #include "ardour/midi_track.h"
 #include "ardour/operations.h"
+#include "ardour/profile.h"
 #include "ardour/region_factory.h"
 #include "ardour/session.h"
 
@@ -237,6 +238,7 @@ Drag::Drag (Editor* e, ArdourCanvas::Item* i, bool trackview_only)
        , _grab_frame (0)
        , _last_pointer_frame (0)
        , _snap_delta (0)
+       , _snap_delta_music (0.0)
        , _constraint_pressed (false)
 {
 
@@ -267,7 +269,7 @@ Drag::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
        _raw_grab_frame = _editor->canvas_event_sample (event, &_grab_x, &_grab_y);
 
        setup_pointer_frame_offset ();
-       _grab_frame = adjusted_frame (_raw_grab_frame, event);
+       _grab_frame = adjusted_frame (_raw_grab_frame, event).frame;
        _last_pointer_frame = _grab_frame;
        _last_pointer_x = _grab_x;
 
@@ -323,13 +325,13 @@ Drag::end_grab (GdkEvent* event)
        return _move_threshold_passed;
 }
 
-framepos_t
+MusicFrame
 Drag::adjusted_frame (framepos_t f, GdkEvent const * event, bool snap) const
 {
-       framepos_t pos = 0;
+       MusicFrame pos (0, 0);
 
        if (f > _pointer_frame_offset) {
-               pos = f - _pointer_frame_offset;
+               pos.frame = f - _pointer_frame_offset;
        }
 
        if (snap) {
@@ -342,7 +344,7 @@ Drag::adjusted_frame (framepos_t f, GdkEvent const * event, bool snap) const
 framepos_t
 Drag::adjusted_current_frame (GdkEvent const * event, bool snap) const
 {
-       return adjusted_frame (_drags->current_pointer_frame (), event, snap);
+       return adjusted_frame (_drags->current_pointer_frame (), event, snap).frame;
 }
 
 frameoffset_t
@@ -354,6 +356,15 @@ Drag::snap_delta (guint state) const
 
        return 0;
 }
+double
+Drag::snap_delta_music (guint state) const
+{
+       if (ArdourKeyboard::indicates_snap_delta (state)) {
+               return _snap_delta_music;
+       }
+
+       return 0.0;
+}
 
 double
 Drag::current_pointer_x() const
@@ -372,11 +383,18 @@ Drag::current_pointer_y () const
 }
 
 void
-Drag::setup_snap_delta (framepos_t pos)
+Drag::setup_snap_delta (MusicFrame pos)
 {
-       framepos_t temp = pos;
-       _editor->snap_to (temp, ARDOUR::RoundNearest, false, true);
-       _snap_delta = temp - pos;
+       TempoMap& map (_editor->session()->tempo_map());
+       MusicFrame snap (pos);
+       _editor->snap_to (snap, ARDOUR::RoundNearest, false, true);
+       _snap_delta = snap.frame - pos.frame;
+
+       _snap_delta_music = 0.0;
+
+       if (_snap_delta != 0) {
+               _snap_delta_music = map.exact_qn_at_frame (snap.frame, snap.division) - map.exact_qn_at_frame (pos.frame, pos.division);
+       }
 }
 
 bool
@@ -512,7 +530,7 @@ Drag::show_verbose_cursor_text (string const & text)
 }
 
 boost::shared_ptr<Region>
-Drag::add_midi_region (MidiTimeAxisView* view, bool commit, const int32_t sub_num)
+Drag::add_midi_region (MidiTimeAxisView* view, bool commit)
 {
        if (_editor->session()) {
                const TempoMap& map (_editor->session()->tempo_map());
@@ -521,7 +539,7 @@ Drag::add_midi_region (MidiTimeAxisView* view, bool commit, const int32_t sub_nu
                   might be wrong.
                */
                framecnt_t len = map.frame_at_beat (max (0.0, map.beat_at_frame (pos)) + 1.0) - pos;
-               return view->add_region (grab_frame(), len, commit, sub_num);
+               return view->add_region (grab_frame(), len, commit);
        }
 
        return boost::shared_ptr<Region>();
@@ -598,33 +616,11 @@ RegionDrag::find_time_axis_view (TimeAxisView* t) const
        return i;
 }
 
-/** determines if @pos is the closest frame to an exact musical division when using SnapMagnetic.
- *  (SnapMagnetic may snap to an exact division or no division at all).
- *  this is a hotfix for musical region position/trim. we should really
- *  deliver musical divisors when snapping magnetically to avoid this.
-*/
-int32_t
-RegionDrag::current_music_divisor (framepos_t pos, int32_t button_state)
-{
-       int32_t divisions = _editor->get_grid_music_divisions (button_state);
-
-       if (_editor->snap_mode() == Editing::SnapMagnetic && !ArdourKeyboard::indicates_snap (button_state)) {
-               TempoMap& tmap (_editor->session()->tempo_map());
-               const framepos_t exact_qn_pos = tmap.frame_at_quarter_note (tmap.exact_qn_at_frame (pos, divisions));
-
-               if (pos != exact_qn_pos) {
-                       /* magnetic has not snapped */
-                       divisions = 0;
-               }
-       }
-
-       return divisions;
-}
-
 RegionMotionDrag::RegionMotionDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v, bool b)
        : RegionDrag (e, i, p, v)
        , _brushing (b)
        , _ignore_video_lock (false)
+       , _last_position (0, 0)
        , _total_x_delta (0)
        , _last_pointer_time_axis_view (0)
        , _last_pointer_layer (0)
@@ -639,9 +635,9 @@ void
 RegionMotionDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 {
        Drag::start_grab (event, cursor);
-       setup_snap_delta (_last_frame_position);
+       setup_snap_delta (_last_position);
 
-       show_verbose_cursor_time (_last_frame_position);
+       show_verbose_cursor_time (_last_position.frame);
 
        pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (current_pointer_y ());
        if (tv.first) {
@@ -661,14 +657,13 @@ RegionMotionDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 }
 
 double
-RegionMotionDrag::compute_x_delta (GdkEvent const * event, framepos_t* pending_region_position)
+RegionMotionDrag::compute_x_delta (GdkEvent const * event, MusicFrame* pending_region_position)
 {
        /* compute the amount of pointer motion in frames, and where
           the region would be if we moved it by that much.
        */
        *pending_region_position = adjusted_frame (_drags->current_pointer_frame (), event, false);
 
-       framepos_t sync_frame;
        framecnt_t sync_offset;
        int32_t sync_dir;
 
@@ -676,47 +671,44 @@ RegionMotionDrag::compute_x_delta (GdkEvent const * event, framepos_t* pending_r
 
        /* we don't handle a sync point that lies before zero.
         */
-       if (sync_dir >= 0 || (sync_dir < 0 && *pending_region_position >= sync_offset)) {
+       if (sync_dir >= 0 || (sync_dir < 0 && pending_region_position->frame >= sync_offset)) {
 
                framecnt_t const sd = snap_delta (event->button.state);
-               sync_frame = *pending_region_position + (sync_dir * sync_offset) + sd;
-
-               _editor->snap_to_with_modifier (sync_frame, event);
-
-               *pending_region_position = _primary->region()->adjust_to_sync (sync_frame) - sd;
-
+               MusicFrame sync_snap (pending_region_position->frame + (sync_dir * sync_offset) + sd, 0);
+               _editor->snap_to_with_modifier (sync_snap, event);
+               if (sync_offset == 0 && sd == 0) {
+                       *pending_region_position = sync_snap;
+               } else {
+                       pending_region_position->set (_primary->region()->adjust_to_sync (sync_snap.frame) - sd, 0);
+               }
        } else {
-               *pending_region_position = _last_frame_position;
+               *pending_region_position = _last_position;
        }
 
-       if (*pending_region_position > max_framepos - _primary->region()->length()) {
-               *pending_region_position = _last_frame_position;
+       if (pending_region_position->frame > max_framepos - _primary->region()->length()) {
+               *pending_region_position = _last_position;
        }
 
        double dx = 0;
 
        bool const x_move_allowed = !_x_constrained;
 
-       if ((*pending_region_position != _last_frame_position) && x_move_allowed) {
+       if ((pending_region_position->frame != _last_position.frame) && x_move_allowed) {
 
                /* x movement since last time (in pixels) */
-               dx = (static_cast<double> (*pending_region_position) - _last_frame_position) / _editor->samples_per_pixel;
+               dx = _editor->sample_to_pixel_unrounded (pending_region_position->frame - _last_position.frame);
 
                /* total x movement */
-               framecnt_t total_dx = *pending_region_position;
-               if (regions_came_from_canvas()) {
-                       total_dx = total_dx - grab_frame ();
-               }
+               framecnt_t total_dx = _editor->pixel_to_sample (_total_x_delta + dx);
 
-               /* check that no regions have gone off the start of the session */
                for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ++i) {
-                       if ((i->view->region()->position() + total_dx) < 0) {
-                               dx = 0;
-                               *pending_region_position = _last_frame_position;
+                       frameoffset_t const off = i->view->region()->position() + total_dx;
+                       if (off < 0) {
+                               dx = dx - _editor->sample_to_pixel_unrounded (off);
+                               *pending_region_position = MusicFrame (pending_region_position->frame - off, 0);
                                break;
                        }
                }
-
        }
 
        return dx;
@@ -953,9 +945,14 @@ RegionMotionDrag::motion (GdkEvent* event, bool first_move)
        }
 
        /* Work out the change in x */
-       framepos_t pending_region_position;
+       TempoMap& tmap = _editor->session()->tempo_map();
+       MusicFrame pending_region_position (0, 0);
        double const x_delta = compute_x_delta (event, &pending_region_position);
-       _last_frame_position = pending_region_position;
+
+       double const last_pos_qn = tmap.exact_qn_at_frame (_last_position.frame, _last_position.division);
+       double const qn_delta = tmap.exact_qn_at_frame (pending_region_position.frame, pending_region_position.division) - last_pos_qn;
+
+       _last_position = pending_region_position;
 
        /* calculate hidden tracks in current y-axis delta */
        int delta_skip = 0;
@@ -1158,7 +1155,7 @@ RegionMotionDrag::motion (GdkEvent* event, bool first_move)
                        i->layer += this_delta_layer;
 
                        if (_brushing) {
-                               _editor->mouse_brush_insert_region (rv, pending_region_position);
+                               _editor->mouse_brush_insert_region (rv, pending_region_position.frame);
                        } else {
                                Duple track_origin;
 
@@ -1198,14 +1195,22 @@ RegionMotionDrag::motion (GdkEvent* event, bool first_move)
                }
 
                /* Now move the region view */
-               rv->move (x_delta, y_delta);
+               if (rv->region()->position_lock_style() == MusicTime) {
+                       double const last_qn = tmap.quarter_note_at_frame (rv->get_position());
+                       framepos_t const x_pos_music = tmap.frame_at_quarter_note (last_qn + qn_delta);
+
+                       rv->set_position (x_pos_music, 0);
+                       rv->move (0, y_delta);
+               } else {
+                       rv->move (x_delta, y_delta);
+               }
 
        } /* foreach region */
 
        _total_x_delta += x_delta;
 
        if (x_delta != 0 && !_brushing) {
-               show_verbose_cursor_time (_last_frame_position);
+               show_verbose_cursor_time (_last_position.frame);
        }
 
        /* keep track of pointer movement */
@@ -1295,12 +1300,7 @@ RegionMoveDrag::motion (GdkEvent* event, bool first_move)
                        const boost::shared_ptr<const Region> original = rv->region();
                        boost::shared_ptr<Region> region_copy;
 
-                       if (rv == _primary) {
-                               region_copy = RegionFactory::create (original, true
-                                                                    , current_music_divisor (original->position(), event->button.state));
-                       } else {
-                               region_copy = RegionFactory::create (original, true, 0);
-                       }
+                       region_copy = RegionFactory::create (original, true);
 
                        /* need to set this so that the drop zone code can work. This doesn't
                           actually put the region into the playlist, but just sets a weak pointer
@@ -1398,16 +1398,15 @@ RegionMoveDrag::finished (GdkEvent* ev, bool movement_occurred)
                i->view->get_canvas_group()->show ();
        }
 
-       bool const changed_position = (_last_frame_position != _primary->region()->position());
+       bool const changed_position = (_last_position.frame != _primary->region()->position());
        bool const changed_tracks = (_time_axis_views[_views.front().time_axis_view] != &_views.front().view->get_time_axis_view());
-       framecnt_t const drag_delta = _primary->region()->position() - _last_frame_position;
 
        if (_copy) {
 
                finished_copy (
                        changed_position,
                        changed_tracks,
-                       drag_delta,
+                       _last_position,
                        ev->button.state
                        );
 
@@ -1416,13 +1415,11 @@ RegionMoveDrag::finished (GdkEvent* ev, bool movement_occurred)
                finished_no_copy (
                        changed_position,
                        changed_tracks,
-                       drag_delta,
+                       _last_position,
                        ev->button.state
                        );
 
        }
-
-       _editor->maybe_locate_with_edit_preroll (_editor->get_selection().regions.start());
 }
 
 RouteTimeAxisView*
@@ -1444,7 +1441,9 @@ RegionMoveDrag::create_destination_time_axis (boost::shared_ptr<Region> region,
                } else {
                        ChanCount one_midi_port (DataType::MIDI, 1);
                        list<boost::shared_ptr<MidiTrack> > midi_tracks;
-                       midi_tracks = _editor->session()->new_midi_track (one_midi_port, one_midi_port, boost::shared_ptr<ARDOUR::PluginInfo>(),
+                       midi_tracks = _editor->session()->new_midi_track (one_midi_port, one_midi_port,
+                                                                         Config->get_strict_io () || Profile->get_mixbus (),
+                                                                         boost::shared_ptr<ARDOUR::PluginInfo>(),
                                                                          (ARDOUR::Plugin::PresetRecord*) 0,
                                                                          (ARDOUR::RouteGroup*) 0, 1, region->name(), PresentationInfo::max_order);
                        tav = _editor->axis_view_from_stripable (midi_tracks.front());
@@ -1461,15 +1460,16 @@ RegionMoveDrag::create_destination_time_axis (boost::shared_ptr<Region> region,
 }
 
 void
-RegionMoveDrag::finished_copy (bool const changed_position, bool const /*changed_tracks*/, framecnt_t const drag_delta, int32_t const ev_state)
+RegionMoveDrag::finished_copy (bool const changed_position, bool const /*changed_tracks*/, MusicFrame last_position, int32_t const ev_state)
 {
        RegionSelection new_views;
        PlaylistSet modified_playlists;
        RouteTimeAxisView* new_time_axis_view = 0;
+       framecnt_t const drag_delta = _primary->region()->position() - _last_position.frame;
 
-       int32_t divisor = current_music_divisor (_primary->region()->position() - drag_delta, ev_state);
        TempoMap& tmap (_editor->session()->tempo_map());
-       double qn_delta = _primary->region()->quarter_note() - tmap.exact_qn_at_frame (_primary->region()->position() - drag_delta, divisor);
+       const double last_pos_qn = tmap.exact_qn_at_frame (last_position.frame, last_position.division);
+       const double qn_delta = _primary->region()->quarter_note() - last_pos_qn;
 
        if (_brushing) {
                /* all changes were made during motion event handlers */
@@ -1494,12 +1494,16 @@ RegionMoveDrag::finished_copy (bool const changed_position, bool const /*changed
                        continue;
                }
 
-               framepos_t where;
+               MusicFrame where (0, 0);
+               double quarter_note;
 
                if (changed_position && !_x_constrained) {
-                       where = i->view->region()->position() - drag_delta;
+                       where.set (i->view->region()->position() - drag_delta, 0);
+                       quarter_note = i->view->region()->quarter_note() - qn_delta;
                } else {
-                       where = i->view->region()->position();
+                       /* region has not moved - divisor will not affect musical pos */
+                       where.set (i->view->region()->position(), 0);
+                       quarter_note = i->view->region()->quarter_note();
                }
 
                if (i->time_axis_view < 0 || i->time_axis_view >= (int)_time_axis_views.size()) {
@@ -1527,17 +1531,16 @@ RegionMoveDrag::finished_copy (bool const changed_position, bool const /*changed
 
                if (dest_rtv != 0) {
                        RegionView* new_view;
-                       if (i->view == _primary) {
-                               new_view = insert_region_into_playlist (i->view->region(), dest_rtv, i->layer, where,
-                                                                       modified_playlists, current_music_divisor (where, ev_state));
+                       if (i->view == _primary && !_x_constrained) {
+                               new_view = insert_region_into_playlist (i->view->region(), dest_rtv, i->layer, last_position, last_pos_qn,
+                                                                       modified_playlists, true);
                        } else {
                                if (i->view->region()->position_lock_style() == AudioTime) {
-                                       new_view = insert_region_into_playlist (i->view->region(), dest_rtv, i->layer, where,
-                                                                               modified_playlists, 0);
+                                       new_view = insert_region_into_playlist (i->view->region(), dest_rtv, i->layer, where, quarter_note,
+                                                                               modified_playlists);
                                } else {
-                                       where = tmap.frame_at_quarter_note (i->view->region()->quarter_note() - qn_delta);
-                                       new_view = insert_region_into_playlist (i->view->region(), dest_rtv, i->layer, where,
-                                                                               modified_playlists, 0);
+                                       new_view = insert_region_into_playlist (i->view->region(), dest_rtv, i->layer, where, quarter_note,
+                                                                               modified_playlists, true);
                                }
                        }
 
@@ -1574,7 +1577,7 @@ void
 RegionMoveDrag::finished_no_copy (
        bool const changed_position,
        bool const changed_tracks,
-       framecnt_t const drag_delta,
+       MusicFrame last_position,
        int32_t const ev_state
        )
 {
@@ -1583,13 +1586,14 @@ RegionMoveDrag::finished_no_copy (
        PlaylistSet frozen_playlists;
        set<RouteTimeAxisView*> views_to_update;
        RouteTimeAxisView* new_time_axis_view = 0;
+       framecnt_t const drag_delta = _primary->region()->position() - _last_position.frame;
 
        typedef map<boost::shared_ptr<Playlist>, RouteTimeAxisView*> PlaylistMapping;
        PlaylistMapping playlist_mapping;
 
-       int32_t divisor = current_music_divisor (_primary->region()->position() - drag_delta, ev_state);
        TempoMap& tmap (_editor->session()->tempo_map());
-       double qn_delta = _primary->region()->quarter_note() - tmap.exact_qn_at_frame (_primary->region()->position() - drag_delta, divisor);
+       const double last_pos_qn = tmap.exact_qn_at_frame (last_position.frame, last_position.division);
+       const double qn_delta = _primary->region()->quarter_note() - last_pos_qn;
 
        std::set<boost::shared_ptr<const Region> > uniq;
        for (list<DraggingView>::const_iterator i = _views.begin(); i != _views.end(); ) {
@@ -1639,35 +1643,37 @@ RegionMoveDrag::finished_no_copy (
 
                views_to_update.insert (dest_rtv);
 
-               framepos_t where;
+               MusicFrame where (0, 0);
+               double quarter_note;
 
                if (changed_position && !_x_constrained) {
-                       where = rv->region()->position() - drag_delta;
+                       where.set (rv->region()->position() - drag_delta, 0);
+                       quarter_note = i->view->region()->quarter_note() - qn_delta;
                } else {
-                       where = rv->region()->position();
+                       where.set (rv->region()->position(), 0);
+                       quarter_note = i->view->region()->quarter_note();
                }
 
                if (changed_tracks) {
 
                        /* insert into new playlist */
                        RegionView* new_view;
-                       if (rv == _primary) {
+                       if (rv == _primary && !_x_constrained) {
                                new_view = insert_region_into_playlist (
-                                       RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, where,
-                                       modified_playlists, current_music_divisor (where, ev_state)
+                                       RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, last_position, last_pos_qn,
+                                       modified_playlists, true
                                        );
                        } else {
                                if (rv->region()->position_lock_style() == AudioTime) {
 
                                        new_view = insert_region_into_playlist (
-                                               RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, where,
-                                               modified_playlists, 0
+                                               RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, where, quarter_note,
+                                               modified_playlists
                                                );
                                } else {
-                                       where = tmap.frame_at_quarter_note (rv->region()->quarter_note() - qn_delta);
                                        new_view = insert_region_into_playlist (
-                                               RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, where,
-                                               modified_playlists, 0
+                                               RegionFactory::create (rv->region (), true), dest_rtv, dest_layer, where, quarter_note,
+                                               modified_playlists, true
                                                );
                                }
                        }
@@ -1729,13 +1735,14 @@ RegionMoveDrag::finished_no_copy (
                                playlist->freeze ();
                        }
                        if (rv == _primary) {
-                               rv->region()->set_position (where, current_music_divisor (where, ev_state));
+                               rv->region()->set_position (where.frame, last_position.division);
                        } else {
                                if (rv->region()->position_lock_style() == AudioTime) {
-                                       rv->region()->set_position (where, 0);
+                                       /* move by frame offset */
+                                       rv->region()->set_position (where.frame, 0);
                                } else {
-                                       rv->region()->set_position (tmap.frame_at_quarter_note (rv->region()->quarter_note() - qn_delta), 0);
-
+                                       /* move by music offset */
+                                       rv->region()->set_position_music (rv->region()->quarter_note() - qn_delta);
                                }
                        }
                        _editor->session()->add_command (new StatefulDiffCommand (rv->region()));
@@ -1837,11 +1844,12 @@ RegionMoveDrag::remove_region_from_playlist (
 RegionView *
 RegionMoveDrag::insert_region_into_playlist (
        boost::shared_ptr<Region> region,
-       RouteTimeAxisView* dest_rtv,
-       layer_t dest_layer,
-       framecnt_t where,
-       PlaylistSet& modified_playlists,
-       const int32_t sub_num
+       RouteTimeAxisView*        dest_rtv,
+       layer_t                   dest_layer,
+       MusicFrame                where,
+       double                    quarter_note,
+       PlaylistSet&              modified_playlists,
+       bool                      for_music
        )
 {
        boost::shared_ptr<Playlist> dest_playlist = dest_rtv->playlist ();
@@ -1858,7 +1866,11 @@ RegionMoveDrag::insert_region_into_playlist (
        if (r.second) {
                dest_playlist->clear_changes ();
        }
-       dest_playlist->add_region (region, where, 1.0, false, sub_num);
+       if (for_music) {
+               dest_playlist->add_region (region, where.frame, 1.0, false, where.division, quarter_note, true);
+       } else {
+               dest_playlist->add_region (region, where.frame, 1.0, false, where.division);
+       }
 
        if (dest_rtv->view()->layer_display() == Stacked || dest_rtv->view()->layer_display() == Expanded) {
                dest_playlist->set_layer (region, dest_layer);
@@ -1953,13 +1965,13 @@ RegionMoveDrag::RegionMoveDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p,
                speed = rtv->track()->speed ();
        }
 
-       _last_frame_position = static_cast<framepos_t> (_primary->region()->position() / speed);
+       _last_position = MusicFrame (static_cast<framepos_t> (_primary->region()->position() / speed), 0);
 }
 
 void
 RegionMoveDrag::setup_pointer_frame_offset ()
 {
-       _pointer_frame_offset = raw_grab_frame() - _last_frame_position;
+       _pointer_frame_offset = raw_grab_frame() - _last_position.frame;
 }
 
 RegionInsertDrag::RegionInsertDrag (Editor* e, boost::shared_ptr<Region> r, RouteTimeAxisView* v, framepos_t pos)
@@ -1976,7 +1988,7 @@ RegionInsertDrag::RegionInsertDrag (Editor* e, boost::shared_ptr<Region> r, Rout
        _primary->set_position (pos, 0);
        _views.push_back (DraggingView (_primary, this, v));
 
-       _last_frame_position = pos;
+       _last_position = MusicFrame (pos, 0);
 
        _item = _primary->get_canvas_group ();
 }
@@ -1996,11 +2008,13 @@ RegionInsertDrag::finished (GdkEvent * event, bool)
 
        _editor->begin_reversible_command (Operations::insert_region);
        playlist->clear_changes ();
-       playlist->add_region (_primary->region (), _last_frame_position);
+       _editor->snap_to_with_modifier (_last_position, event);
+
+       playlist->add_region (_primary->region (), _last_position.frame, 1.0, false, _last_position.division);
 
        // Mixbus doesn't seem to ripple when inserting regions from the list: should we? yes, probably
        if (Config->get_edit_mode() == Ripple) {
-               playlist->ripple (_last_frame_position, _primary->region()->length(), _primary->region());
+               playlist->ripple (_last_position.frame, _primary->region()->length(), _primary->region());
        }
 
        _editor->session()->add_command (new StatefulDiffCommand (playlist));
@@ -2277,7 +2291,7 @@ RegionRippleDrag::motion (GdkEvent* event, bool first_move)
 
        framepos_t where = adjusted_current_frame (event);
        assert (where >= 0);
-       framepos_t after;
+       MusicFrame after (0, 0);
        double delta = compute_x_delta (event, &after);
 
        framecnt_t amount = _editor->pixel_to_sample (delta);
@@ -2327,7 +2341,7 @@ RegionRippleDrag::motion (GdkEvent* event, bool first_move)
                prev_amount += amount;
        }
 
-       _last_frame_position = after;
+       _last_position = after;
 }
 
 void
@@ -2408,7 +2422,7 @@ RegionCreateDrag::motion (GdkEvent* event, bool first_move)
 {
        if (first_move) {
                _editor->begin_reversible_command (_("create region"));
-               _region = add_midi_region (_view, false, _editor->get_grid_music_divisions (event->button.state));
+               _region = add_midi_region (_view, false);
                _view->playlist()->freeze ();
        } else {
                if (_region) {
@@ -2434,7 +2448,7 @@ void
 RegionCreateDrag::finished (GdkEvent* event, bool movement_occurred)
 {
        if (!movement_occurred) {
-               add_midi_region (_view, true, _editor->get_grid_music_divisions (event->button.state));
+               add_midi_region (_view, true);
        } else {
                _view->playlist()->thaw ();
                _editor->commit_reversible_command();
@@ -2866,7 +2880,7 @@ TrimDrag::start_grab (GdkEvent* event, Gdk::Cursor*)
        framecnt_t const region_length = (framecnt_t) (_primary->region()->length() / speed);
 
        framepos_t const pf = adjusted_current_frame (event);
-       setup_snap_delta (region_start);
+       setup_snap_delta (MusicFrame(region_start, 0));
 
        if (Keyboard::modifier_state_equals (event->button.state, ArdourKeyboard::trim_contents_modifier ())) {
                /* Move the contents of the region around without changing the region bounds */
@@ -2929,8 +2943,8 @@ TrimDrag::motion (GdkEvent* event, bool first_move)
        if (tv && tv->is_track()) {
                speed = tv->track()->speed();
        }
-       framecnt_t adj_frame = adjusted_frame (_drags->current_pointer_frame () + snap_delta (event->button.state), event, true);
-       framecnt_t dt = adj_frame - raw_grab_frame () + _pointer_frame_offset - snap_delta (event->button.state);
+       MusicFrame adj_frame = adjusted_frame (_drags->current_pointer_frame () + snap_delta (event->button.state), event, true);
+       framecnt_t dt = adj_frame.frame - raw_grab_frame () + _pointer_frame_offset - snap_delta (event->button.state);
 
        if (first_move) {
 
@@ -3011,13 +3025,11 @@ TrimDrag::motion (GdkEvent* event, bool first_move)
                }
        }
 
-       int32_t divisions = current_music_divisor (adj_frame, event->button.state);
-
        switch (_operation) {
        case StartTrim:
                for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
                        bool changed = i->view->trim_front (i->initial_position + dt, non_overlap_trim
-                                                           , divisions);
+                                                           , adj_frame.division);
 
                        if (changed && _preserve_fade_anchor) {
                                AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
@@ -3036,7 +3048,7 @@ TrimDrag::motion (GdkEvent* event, bool first_move)
 
        case EndTrim:
                for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
-                       bool changed = i->view->trim_end (i->initial_end + dt, non_overlap_trim, divisions);
+                       bool changed = i->view->trim_end (i->initial_end + dt, non_overlap_trim, adj_frame.division);
                        if (changed && _preserve_fade_anchor) {
                                AudioRegionView* arv = dynamic_cast<AudioRegionView*> (i->view);
                                if (arv) {
@@ -3121,18 +3133,6 @@ TrimDrag::finished (GdkEvent* event, bool movement_occurred)
                        }
                }
 
-               if (!_views.empty()) {
-                       if (_operation == StartTrim) {
-                               _editor->maybe_locate_with_edit_preroll(
-                                       _views.begin()->view->region()->position());
-                       }
-                       if (_operation == EndTrim) {
-                               _editor->maybe_locate_with_edit_preroll(
-                                       _views.begin()->view->region()->position() +
-                                       _views.begin()->view->region()->length());
-                       }
-               }
-
                if (!_editor->selection->selected (_primary)) {
                        _primary->thaw_after_trim ();
                } else {
@@ -3167,7 +3167,7 @@ TrimDrag::finished (GdkEvent* event, bool movement_occurred)
 
        } else {
                /* no mouse movement */
-               if (adjusted_current_frame (event) != adjusted_frame (_drags->current_pointer_frame(), event, false)) {
+               if (adjusted_current_frame (event) != adjusted_frame (_drags->current_pointer_frame(), event, false).frame) {
                        _editor->point_trim (event, adjusted_current_frame (event));
                }
        }
@@ -3310,7 +3310,7 @@ MeterMarkerDrag::motion (GdkEvent* event, bool first_move)
                pf = adjusted_current_frame (event, false);
        }
 
-       _editor->session()->tempo_map().gui_move_meter (_real_section, pf);
+       _editor->session()->tempo_map().gui_set_meter_position (_real_section, pf);
 
        /* fake marker meeds to stay under the mouse, unlike the real one. */
        _marker->set_position (adjusted_current_frame (event, false));
@@ -3473,7 +3473,7 @@ TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
                /* snap to beat is 1, snap to bar is -1 (sorry) */
                const int sub_num = _editor->get_grid_music_divisions (event->button.state);
 
-               map.gui_move_tempo (_real_section, pf, sub_num);
+               map.gui_set_tempo_position (_real_section, pf, sub_num);
 
                show_verbose_cursor_time (_real_section->frame());
        }
@@ -3572,7 +3572,7 @@ BBTRulerDrag::motion (GdkEvent* event, bool first_move)
        if (first_move) {
                /* get current state */
                before_state = &map.get_state();
-               _editor->begin_reversible_command (_("dilate tempo"));
+               _editor->begin_reversible_command (_("stretch tempo"));
        }
 
        framepos_t pf;
@@ -3585,7 +3585,7 @@ BBTRulerDrag::motion (GdkEvent* event, bool first_move)
 
        if (ArdourKeyboard::indicates_constraint (event->button.state)) {
                /* adjust previous tempo to match pointer frame */
-               _editor->session()->tempo_map().gui_dilate_tempo (_tempo, map.frame_at_quarter_note (_grab_qn), pf);
+               _editor->session()->tempo_map().gui_stretch_tempo (_tempo, map.frame_at_quarter_note (_grab_qn), pf);
        }
        ostringstream sstr;
        sstr << "^" << fixed << setprecision(3) << map.tempo_at_frame (pf).note_types_per_minute() << "\n";
@@ -3659,15 +3659,15 @@ void
 CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
 {
        Drag::start_grab (event, c);
-       setup_snap_delta (_editor->playhead_cursor->current_frame ());
+       setup_snap_delta (MusicFrame (_editor->playhead_cursor->current_frame(), 0));
 
        _grab_zoom = _editor->samples_per_pixel;
 
-       framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
+       MusicFrame where (_editor->canvas_event_sample (event) + snap_delta (event->button.state), 0);
 
        _editor->snap_to_with_modifier (where, event);
-
        _editor->_dragging_playhead = true;
+       _editor->_control_scroll_target = where.frame;
 
        Session* s = _editor->session ();
 
@@ -3701,16 +3701,18 @@ CursorDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
                }
        }
 
-       fake_locate (where - snap_delta (event->button.state));
+       fake_locate (where.frame - snap_delta (event->button.state));
 }
 
 void
 CursorDrag::motion (GdkEvent* event, bool)
 {
-       framepos_t where = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
+       MusicFrame where (_editor->canvas_event_sample (event) + snap_delta (event->button.state), 0);
+
        _editor->snap_to_with_modifier (where, event);
-       if (where != last_pointer_frame()) {
-               fake_locate (where - snap_delta (event->button.state));
+
+       if (where.frame != last_pointer_frame()) {
+               fake_locate (where.frame - snap_delta (event->button.state));
        }
 }
 
@@ -3745,7 +3747,7 @@ CursorDrag::aborted (bool)
                _editor->_dragging_playhead = false;
        }
 
-       _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false));
+       _editor->playhead_cursor->set_position (adjusted_frame (grab_frame (), 0, false).frame);
 }
 
 FadeInDrag::FadeInDrag (Editor* e, ArdourCanvas::Item* i, RegionView* p, list<RegionView*> const & v)
@@ -3761,7 +3763,7 @@ FadeInDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 
        AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
        boost::shared_ptr<AudioRegion> const r = arv->audio_region ();
-       setup_snap_delta (r->position ());
+       setup_snap_delta (MusicFrame (r->position(), 0));
 
        show_verbose_cursor_duration (r->position(), r->position() + r->fade_in()->back()->when, 32);
 }
@@ -3779,18 +3781,19 @@ FadeInDrag::motion (GdkEvent* event, bool)
 {
        framecnt_t fade_length;
 
-       framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
+       MusicFrame pos (_editor->canvas_event_sample (event) + snap_delta (event->button.state), 0);
        _editor->snap_to_with_modifier (pos, event);
-       pos -= snap_delta (event->button.state);
+
+       pos.frame -= snap_delta (event->button.state);
 
        boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
 
-       if (pos < (region->position() + 64)) {
+       if (pos.frame < (region->position() + 64)) {
                fade_length = 64; // this should be a minimum defined somewhere
-       } else if (pos > region->position() + region->length() - region->fade_out()->back()->when) {
+       } else if (pos.frame > region->position() + region->length() - region->fade_out()->back()->when) {
                fade_length = region->length() - region->fade_out()->back()->when - 1;
        } else {
-               fade_length = pos - region->position();
+               fade_length = pos.frame - region->position();
        }
 
        for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
@@ -3815,18 +3818,19 @@ FadeInDrag::finished (GdkEvent* event, bool movement_occurred)
        }
 
        framecnt_t fade_length;
-       framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
+       MusicFrame pos (_editor->canvas_event_sample (event) + snap_delta (event->button.state), 0);
+
        _editor->snap_to_with_modifier (pos, event);
-       pos -= snap_delta (event->button.state);
+       pos.frame -= snap_delta (event->button.state);
 
        boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
 
-       if (pos < (region->position() + 64)) {
+       if (pos.frame < (region->position() + 64)) {
                fade_length = 64; // this should be a minimum defined somewhere
-       } else if (pos >= region->position() + region->length() - region->fade_out()->back()->when) {
+       } else if (pos.frame >= region->position() + region->length() - region->fade_out()->back()->when) {
                fade_length = region->length() - region->fade_out()->back()->when - 1;
        } else {
-               fade_length = pos - region->position();
+               fade_length = pos.frame - region->position();
        }
 
        bool in_command = false;
@@ -3885,7 +3889,7 @@ FadeOutDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 
        AudioRegionView* arv = dynamic_cast<AudioRegionView*> (_primary);
        boost::shared_ptr<AudioRegion> r = arv->audio_region ();
-       setup_snap_delta (r->last_frame ());
+       setup_snap_delta (MusicFrame (r->last_frame(), 0));
 
        show_verbose_cursor_duration (r->last_frame() - r->fade_out()->back()->when, r->last_frame());
 }
@@ -3902,19 +3906,19 @@ void
 FadeOutDrag::motion (GdkEvent* event, bool)
 {
        framecnt_t fade_length;
+       MusicFrame pos (_editor->canvas_event_sample (event) + snap_delta (event->button.state), 0);
 
-       framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
        _editor->snap_to_with_modifier (pos, event);
-       pos -= snap_delta (event->button.state);
+       pos.frame -= snap_delta (event->button.state);
 
        boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
 
-       if (pos > (region->last_frame() - 64)) {
+       if (pos.frame > (region->last_frame() - 64)) {
                fade_length = 64; // this should really be a minimum fade defined somewhere
-       } else if (pos <= region->position() + region->fade_in()->back()->when) {
+       } else if (pos.frame <= region->position() + region->fade_in()->back()->when) {
                fade_length = region->length() - region->fade_in()->back()->when - 1;
        } else {
-               fade_length = region->last_frame() - pos;
+               fade_length = region->last_frame() - pos.frame;
        }
 
        for (list<DraggingView>::iterator i = _views.begin(); i != _views.end(); ++i) {
@@ -3939,19 +3943,19 @@ FadeOutDrag::finished (GdkEvent* event, bool movement_occurred)
        }
 
        framecnt_t fade_length;
+       MusicFrame pos (_editor->canvas_event_sample (event) + snap_delta (event->button.state), 0);
 
-       framepos_t pos = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
        _editor->snap_to_with_modifier (pos, event);
-       pos -= snap_delta (event->button.state);
+       pos.frame -= snap_delta (event->button.state);
 
        boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (_primary->region ());
 
-       if (pos > (region->last_frame() - 64)) {
+       if (pos.frame > (region->last_frame() - 64)) {
                fade_length = 64; // this should really be a minimum fade defined somewhere
-       } else if (pos <= region->position() + region->fade_in()->back()->when) {
+       } else if (pos.frame <= region->position() + region->fade_in()->back()->when) {
                fade_length = region->length() - region->fade_in()->back()->when - 1;
        } else {
-               fade_length = region->last_frame() - pos;
+               fade_length = region->last_frame() - pos.frame;
        }
 
        bool in_command = false;
@@ -4046,7 +4050,7 @@ MarkerDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
        } else {
                show_verbose_cursor_time (location->end());
        }
-       setup_snap_delta (is_start ? location->start() : location->end());
+       setup_snap_delta (MusicFrame (is_start ? location->start() : location->end(), 0));
 
        Selection::Operation op = ArdourKeyboard::selection_type (event->button.state);
 
@@ -4150,7 +4154,7 @@ MarkerDrag::motion (GdkEvent* event, bool)
        Location *copy_location = 0;
        framecnt_t const sd = snap_delta (event->button.state);
 
-       framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true) - sd;
+       framecnt_t const newframe = adjusted_frame (_drags->current_pointer_frame () + sd, event, true).frame - sd;
        framepos_t next = newframe;
 
        if (Keyboard::modifier_state_contains (event->button.state, ArdourKeyboard::push_points_modifier ())) {
@@ -4210,6 +4214,8 @@ MarkerDrag::motion (GdkEvent* event, bool)
                return;
        }
 
+       const int32_t divisions = _editor->get_grid_music_divisions (event->button.state);
+
        /* now move them all */
 
        for (x = _copied_locations.begin(); x != _copied_locations.end(); ++x) {
@@ -4227,8 +4233,7 @@ MarkerDrag::motion (GdkEvent* event, bool)
                if (copy_location->is_mark()) {
 
                        /* now move it */
-
-                       copy_location->set_start (copy_location->start() + f_delta);
+                       copy_location->set_start (copy_location->start() + f_delta, false, true, divisions);
 
                } else {
 
@@ -4238,27 +4243,27 @@ MarkerDrag::motion (GdkEvent* event, bool)
                        if (is_start) { // start-of-range marker
 
                                if (move_both || (*x).move_both) {
-                                       copy_location->set_start (new_start);
-                                       copy_location->set_end (new_end);
+                                       copy_location->set_start (new_start, false, true, divisions);
+                                       copy_location->set_end (new_end, false, true, divisions);
                                } else  if (new_start < copy_location->end()) {
-                                       copy_location->set_start (new_start);
+                                       copy_location->set_start (new_start, false, true, divisions);
                                } else if (newframe > 0) {
                                        //_editor->snap_to (next, RoundUpAlways, true);
-                                       copy_location->set_end (next);
-                                       copy_location->set_start (newframe);
+                                       copy_location->set_end (next, false, true, divisions);
+                                       copy_location->set_start (newframe, false, true, divisions);
                                }
 
                        } else { // end marker
 
                                if (move_both || (*x).move_both) {
-                                       copy_location->set_end (new_end);
-                                       copy_location->set_start (new_start);
+                                       copy_location->set_end (new_end, divisions);
+                                       copy_location->set_start (new_start, false, true, divisions);
                                } else if (new_end > copy_location->start()) {
-                                       copy_location->set_end (new_end);
+                                       copy_location->set_end (new_end, false, true, divisions);
                                } else if (newframe > 0) {
                                        //_editor->snap_to (next, RoundDownAlways, true);
-                                       copy_location->set_start (next);
-                                       copy_location->set_end (newframe);
+                                       copy_location->set_start (next, false, true, divisions);
+                                       copy_location->set_end (newframe, false, true, divisions);
                                }
                        }
                }
@@ -4335,6 +4340,7 @@ MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
 
        MarkerSelection::iterator i;
        CopiedLocationInfo::iterator x;
+       const int32_t divisions = _editor->get_grid_music_divisions (event->button.state);
        bool is_start;
 
        for (i = _editor->selection->markers.begin(), x = _copied_locations.begin();
@@ -4353,9 +4359,9 @@ MarkerDrag::finished (GdkEvent* event, bool movement_occurred)
                                in_command = true;
                        }
                        if (location->is_mark()) {
-                               location->set_start (((*x).location)->start());
+                               location->set_start (((*x).location)->start(), false, true, divisions);
                        } else {
-                               location->set (((*x).location)->start(), ((*x).location)->end());
+                               location->set (((*x).location)->start(), ((*x).location)->end(), true, divisions);
                        }
 
                        if (location->is_session_range()) {
@@ -4431,8 +4437,7 @@ ControlPointDrag::start_grab (GdkEvent* event, Gdk::Cursor* /*cursor*/)
        _fixed_grab_x = _point->get_x() + _editor->sample_to_pixel_unrounded (_point->line().offset());
        _fixed_grab_y = _point->get_y();
 
-       framepos_t pos = _editor->pixel_to_sample (_fixed_grab_x);
-       setup_snap_delta (pos);
+       setup_snap_delta (MusicFrame (_editor->pixel_to_sample (_fixed_grab_x), 0));
 
        float const fraction = 1 - (_point->get_y() / _point->line().height());
        show_verbose_cursor_text (_point->line().get_verbose_cursor_string (fraction));
@@ -4485,13 +4490,14 @@ ControlPointDrag::motion (GdkEvent* event, bool first_motion)
                cy = zero_gain_y;
        }
 
-       framepos_t cx_frames = _editor->pixel_to_sample (cx) + snap_delta (event->button.state);
+       MusicFrame cx_mf (_editor->pixel_to_sample (cx) + snap_delta (event->button.state), 0);
+
        if (!_x_constrained && need_snap) {
-               _editor->snap_to_with_modifier (cx_frames, event);
+               _editor->snap_to_with_modifier (cx_mf, event);
        }
 
-       cx_frames -= snap_delta (event->button.state);
-       cx_frames = min (cx_frames, _point->line().maximum_time() + _point->line().offset());
+       cx_mf.frame -= snap_delta (event->button.state);
+       cx_mf.frame = min (cx_mf.frame, _point->line().maximum_time() + _point->line().offset());
 
        float const fraction = 1.0 - (cy / _point->line().height());
 
@@ -4501,7 +4507,7 @@ ControlPointDrag::motion (GdkEvent* event, bool first_motion)
                _point->line().start_drag_single (_point, _fixed_grab_x, initial_fraction);
        }
        pair<double, float> result;
-       result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_frames), fraction, false, _pushing, _final_index);
+       result = _point->line().drag_motion (_editor->sample_to_pixel_unrounded (cx_mf.frame), fraction, false, _pushing, _final_index);
 
        show_verbose_cursor_text (_point->line().get_verbose_cursor_string (result.second));
 }
@@ -4764,24 +4770,23 @@ RubberbandSelectDrag::motion (GdkEvent* event, bool)
        framepos_t end;
        double y1;
        double y2;
-
        framepos_t const pf = adjusted_current_frame (event, UIConfiguration::instance().get_rubberbanding_snaps_to_grid());
+       MusicFrame grab (grab_frame (), 0);
 
-       framepos_t grab = grab_frame ();
        if (UIConfiguration::instance().get_rubberbanding_snaps_to_grid ()) {
                _editor->snap_to_with_modifier (grab, event);
        } else {
-               grab = raw_grab_frame ();
+               grab.frame = raw_grab_frame ();
        }
 
        /* base start and end on initial click position */
 
-       if (pf < grab) {
+       if (pf < grab.frame) {
                start = pf;
-               end = grab;
+               end = grab.frame;
        } else {
                end = pf;
-               start = grab;
+               start = grab.frame;
        }
 
        if (current_pointer_y() < grab_y()) {
@@ -4891,7 +4896,7 @@ RubberbandSelectDrag::finished (GdkEvent* event, bool movement_occurred)
                        /* MIDI track */
                        if (_editor->selection->empty() && _editor->mouse_mode == MouseDraw) {
                                /* nothing selected */
-                               add_midi_region (mtv, true, _editor->get_grid_music_divisions(event->button.state));
+                               add_midi_region (mtv, true);
                                do_deselect = false;
                        }
                }
@@ -4930,10 +4935,10 @@ TimeFXDrag::start_grab (GdkEvent* event, Gdk::Cursor* cursor)
 
        _editor->get_selection().add (_primary);
 
-       framepos_t where = _primary->region()->position();
+       MusicFrame where (_primary->region()->position(), 0);
        setup_snap_delta (where);
 
-       show_verbose_cursor_duration (where, adjusted_current_frame (event), 0);
+       show_verbose_cursor_duration (where.frame, adjusted_current_frame (event), 0);
 }
 
 void
@@ -4941,19 +4946,19 @@ TimeFXDrag::motion (GdkEvent* event, bool)
 {
        RegionView* rv = _primary;
        StreamView* cv = rv->get_time_axis_view().view ();
-
        pair<TimeAxisView*, double> const tv = _editor->trackview_by_y_position (grab_y());
        int layer = tv.first->layer_display() == Overlaid ? 0 : tv.second;
        int layers = tv.first->layer_display() == Overlaid ? 1 : cv->layers();
-       framepos_t pf = _editor->canvas_event_sample (event) + snap_delta (event->button.state);
+       MusicFrame pf (_editor->canvas_event_sample (event) + snap_delta (event->button.state), 0);
+
        _editor->snap_to_with_modifier (pf, event);
-       pf -= snap_delta (event->button.state);
+       pf.frame -= snap_delta (event->button.state);
 
-       if (pf > rv->region()->position()) {
-               rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf, layers, layer);
+       if (pf.frame > rv->region()->position()) {
+               rv->get_time_axis_view().show_timestretch (rv->region()->position(), pf.frame, layers, layer);
        }
 
-       show_verbose_cursor_duration (_primary->region()->position(), pf, 0);
+       show_verbose_cursor_duration (_primary->region()->position(), pf.frame, 0);
 }
 
 void
@@ -5047,6 +5052,7 @@ SelectionDrag::SelectionDrag (Editor* e, ArdourCanvas::Item* i, Operation o)
        : Drag (e, i)
        , _operation (o)
        , _add (false)
+       , _track_selection_at_start (e)
        , _time_selection_at_start (!_editor->get_selection().time.empty())
 {
        DEBUG_TRACE (DEBUG::Drags, "New SelectionDrag\n");
@@ -5136,33 +5142,36 @@ SelectionDrag::motion (GdkEvent* event, bool first_move)
        framepos_t end = 0;
        framecnt_t length = 0;
        framecnt_t distance = 0;
-
+       MusicFrame start_mf (0, 0);
        framepos_t const pending_position = adjusted_current_frame (event);
 
        if (_operation != CreateSelection && pending_position == last_pointer_frame()) {
                return;
        }
 
+       if (first_move) {
+               _track_selection_at_start = _editor->selection->tracks;
+       }
+
        switch (_operation) {
        case CreateSelection:
        {
-               framepos_t grab = grab_frame ();
-
+               MusicFrame grab (grab_frame (), 0);
                if (first_move) {
-                       grab = adjusted_current_frame (event, false);
-                       if (grab < pending_position) {
+                       grab.frame = adjusted_current_frame (event, false);
+                       if (grab.frame < pending_position) {
                                _editor->snap_to (grab, RoundDownMaybe);
                        }  else {
                                _editor->snap_to (grab, RoundUpMaybe);
                        }
                }
 
-               if (pending_position < grab) {
+               if (pending_position < grab.frame) {
                        start = pending_position;
-                       end = grab;
+                       end = grab.frame;
                } else {
                        end = pending_position;
-                       start = grab;
+                       start = grab.frame;
                }
 
                /* first drag: Either add to the selection
@@ -5214,32 +5223,59 @@ SelectionDrag::motion (GdkEvent* event, bool first_move)
                                }
                        }
 
-                       //now find any tracks that are GROUPED with the tracks we selected
-                       TrackViewList grouped_add = new_selection;
+                       //now compare our list with the current selection, and add as necessary
+                       //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
+                       TrackViewList tracks_to_add;
+                       TrackViewList tracks_to_remove;
+                       vector<RouteGroup*> selected_route_groups;
+
+                       if (!first_move) {
+                               for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i) {
+                                       if (!new_selection.contains (*i) && !_track_selection_at_start.contains (*i)) {
+                                               tracks_to_remove.push_back (*i);
+                                       } else {
+                                               RouteGroup* rg = (*i)->route_group();
+                                               if (rg && rg->is_active() && rg->is_select()) {
+                                                       selected_route_groups.push_back (rg);
+                                               }
+                                       }
+                               }
+                       }
+
                        for (TrackViewList::const_iterator i = new_selection.begin(); i != new_selection.end(); ++i) {
-                               RouteTimeAxisView *n = dynamic_cast<RouteTimeAxisView *>(*i);
-                               if ( n && n->route()->route_group() && n->route()->route_group()->is_active() && n->route()->route_group()->enabled_property (ARDOUR::Properties::group_select.property_id) ) {
-                                       for (TrackViewList::const_iterator j = all_tracks.begin(); j != all_tracks.end(); ++j) {
-                                               RouteTimeAxisView *check = dynamic_cast<RouteTimeAxisView *>(*j);
-                                               if ( check && (n != check) && (check->route()->route_group() == n->route()->route_group()) )
-                                                       grouped_add.push_back (*j);
+                               if (!_editor->selection->tracks.contains (*i)) {
+                                       tracks_to_add.push_back (*i);
+                                       RouteGroup* rg = (*i)->route_group();
+
+                                       if (rg && rg->is_active() && rg->is_select()) {
+                                               selected_route_groups.push_back (rg);
                                        }
                                }
                        }
 
-                       //now compare our list with the current selection, and add or remove as necessary
-                       //( NOTE: most mouse moves don't change the selection so we can't just SET it for every mouse move; it gets clunky )
-                       TrackViewList tracks_to_add;
-                       TrackViewList tracks_to_remove;
-                       for (TrackViewList::const_iterator i = grouped_add.begin(); i != grouped_add.end(); ++i)
-                               if ( !_editor->selection->tracks.contains ( *i ) )
-                                       tracks_to_add.push_back ( *i );
-                       for (TrackViewList::const_iterator i = _editor->selection->tracks.begin(); i != _editor->selection->tracks.end(); ++i)
-                               if ( !grouped_add.contains ( *i ) )
-                                       tracks_to_remove.push_back ( *i );
-                       _editor->selection->add(tracks_to_add);
-                       _editor->selection->remove(tracks_to_remove);
+                       _editor->selection->add (tracks_to_add);
+
+                       if (!tracks_to_remove.empty()) {
 
+                               /* check all these to-be-removed tracks against the
+                                * possibility that they are selected by being
+                                * in the same group as an approved track.
+                                */
+
+                               for (TrackViewList::iterator i = tracks_to_remove.begin(); i != tracks_to_remove.end(); ) {
+                                       RouteGroup* rg = (*i)->route_group();
+
+                                       if (rg && find (selected_route_groups.begin(), selected_route_groups.end(), rg) != selected_route_groups.end()) {
+                                               i = tracks_to_remove.erase (i);
+                                       } else {
+                                               ++i;
+                                       }
+                               }
+
+                               /* remove whatever is left */
+
+                               _editor->selection->remove (tracks_to_remove);
+                       }
                }
        }
        break;
@@ -5275,9 +5311,11 @@ SelectionDrag::motion (GdkEvent* event, bool first_move)
                length = end - start;
                distance = pending_position - start;
                start = pending_position;
-               _editor->snap_to (start);
 
-               end = start + length;
+               start_mf.frame = start;
+               _editor->snap_to (start_mf);
+
+               end = start_mf.frame + length;
 
                break;
 
@@ -5323,10 +5361,7 @@ SelectionDrag::finished (GdkEvent* event, bool movement_occurred)
                                s->request_play_range (&_editor->selection->time, true);
                        } else if (!s->config.get_external_sync()) {
                                if (UIConfiguration::instance().get_follow_edits() && !s->transport_rolling()) {
-                                       if (_operation == SelectionEndTrim)
-                                               _editor->maybe_locate_with_edit_preroll( _editor->get_selection().time.end_frame());
-                                       else
-                                               s->request_locate (_editor->get_selection().time.start());
+                                       s->request_locate (_editor->get_selection().time.start());
                                }
                        }
 
@@ -5475,15 +5510,15 @@ RangeMarkerBarDrag::motion (GdkEvent* event, bool first_move)
        framepos_t const pf = adjusted_current_frame (event);
 
        if (_operation == CreateSkipMarker || _operation == CreateRangeMarker || _operation == CreateTransportMarker || _operation == CreateCDMarker) {
-               framepos_t grab = grab_frame ();
+               MusicFrame grab (grab_frame (), 0);
                _editor->snap_to (grab);
 
                if (pf < grab_frame()) {
                        start = pf;
-                       end = grab;
+                       end = grab.frame;
                } else {
                        end = pf;
-                       start = grab;
+                       start = grab.frame;
                }
 
                /* first drag: Either add to the selection
@@ -5553,7 +5588,7 @@ RangeMarkerBarDrag::finished (GdkEvent* event, bool movement_occurred)
                        }
                        newloc = new Location (
                                *_editor->session(), _editor->temp_location->start(), _editor->temp_location->end(), rangename, (Location::Flags) flags
-                               );
+                               , _editor->get_grid_music_divisions (event->button.state));
 
                        _editor->session()->locations()->add (newloc, true);
                        XMLNode &after = _editor->session()->locations()->get_state();
@@ -5640,7 +5675,9 @@ NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
        : Drag (e, i)
        , _cumulative_dx (0)
        , _cumulative_dy (0)
+       , _earliest (0.0)
        , _was_selected (false)
+       , _copy (false)
 {
        DEBUG_TRACE (DEBUG::Drags, "New NoteDrag\n");
 
@@ -5650,11 +5687,25 @@ NoteDrag::NoteDrag (Editor* e, ArdourCanvas::Item* i)
        _note_height = _region->midi_stream_view()->note_height ();
 }
 
+void
+NoteDrag::setup_pointer_frame_offset ()
+{
+       _pointer_frame_offset = raw_grab_frame()
+               - _editor->session()->tempo_map().frame_at_quarter_note (_region->session_relative_qn (_primary->note()->time().to_double()));
+}
+
 void
 NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
 {
        Drag::start_grab (event);
-       setup_snap_delta (_region->source_beats_to_absolute_frames (_primary->note()->time ()));
+
+       if (ArdourKeyboard::indicates_copy (event->button.state)) {
+               _copy = true;
+       } else {
+               _copy = false;
+       }
+
+       setup_snap_delta (MusicFrame (_region->source_beats_to_absolute_frames (_primary->note()->time ()), 0));
 
        if (!(_was_selected = _primary->selected())) {
 
@@ -5678,55 +5729,38 @@ NoteDrag::start_grab (GdkEvent* event, Gdk::Cursor *)
        }
 }
 
-/** @return Current total drag x change in frames */
-frameoffset_t
-NoteDrag::total_dx (const guint state) const
+/** @return Current total drag x change in quarter notes */
+double
+NoteDrag::total_dx (GdkEvent * event) const
 {
        if (_x_constrained) {
                return 0;
        }
+
        TempoMap& map (_editor->session()->tempo_map());
 
        /* dx in frames */
        frameoffset_t const dx = _editor->pixel_to_sample (_drags->current_pointer_x() - grab_x());
 
        /* primary note time */
-       double const quarter_note_start = _region->region()->quarter_note() - _region->midi_region()->start_beats();
-       frameoffset_t const n = map.frame_at_quarter_note (quarter_note_start + _primary->note()->time().to_double());
-
-       /* new time of the primary note in session frames */
-       frameoffset_t st = n + dx + snap_delta (state);
-
-       framepos_t const rp = _region->region()->position ();
+       frameoffset_t const n = map.frame_at_quarter_note (_region->session_relative_qn (_primary->note()->time().to_double()));
 
-       /* prevent the note being dragged earlier than the region's position */
-       st = max (st, rp);
+       /* primary note time in quarter notes */
+       double const n_qn = _region->session_relative_qn (_primary->note()->time().to_double());
 
-       /* possibly snap and return corresponding delta */
+       /* new time of the primary note in session frames */
+       frameoffset_t st = n + dx + snap_delta (event->button.state);
 
-       bool snap = true;
+       /* possibly snap and return corresponding delta in quarter notes */
+       MusicFrame snap (st, 0);
+       _editor->snap_to_with_modifier (snap, event);
+       double ret = map.exact_qn_at_frame (snap.frame, snap.division) - n_qn - snap_delta_music (event->button.state);
 
-       if (ArdourKeyboard::indicates_snap (state)) {
-               if (_editor->snap_mode () != SnapOff) {
-                       snap = false;
-               }
-       } else {
-               if (_editor->snap_mode () == SnapOff) {
-                       snap = false;
-                       /* inverted logic here - we;re in snapoff but we've pressed the snap delta modifier */
-                       if (ArdourKeyboard::indicates_snap_delta (state)) {
-                               snap = true;
-                       }
-               }
+       /* prevent the earliest note being dragged earlier than the region's start position */
+       if (_earliest + ret < _region->midi_region()->start_beats()) {
+               ret -= (_earliest + ret) - _region->midi_region()->start_beats();
        }
 
-       frameoffset_t ret;
-       if (snap) {
-               bool const ensure_snap = _editor->snap_mode () != SnapMagnetic;
-               ret =  _region->snap_frame_to_frame (st - rp, ensure_snap) + rp - n - snap_delta (state);
-       } else {
-               ret = st - n - snap_delta (state);
-       }
        return ret;
 }
 
@@ -5750,24 +5784,36 @@ NoteDrag::total_dy () const
 }
 
 void
-NoteDrag::motion (GdkEvent * event, bool)
+NoteDrag::motion (GdkEvent * event, bool first_move)
 {
+       if (first_move) {
+               _earliest = _region->earliest_in_selection().to_double();
+               if (_copy) {
+                       /* make copies of all the selected notes */
+                       _primary = _region->copy_selection (_primary);
+               }
+       }
+
        /* Total change in x and y since the start of the drag */
-       frameoffset_t const dx = total_dx (event->button.state);
+       double const dx_qn = total_dx (event);
        int8_t const dy = total_dy ();
 
        /* Now work out what we have to do to the note canvas items to set this new drag delta */
-       double const tdx = _x_constrained ? 0 : _editor->sample_to_pixel (dx) - _cumulative_dx;
+       double const tdx = _x_constrained ? 0 : dx_qn - _cumulative_dx;
        double const tdy = _y_constrained ? 0 : -dy * _note_height - _cumulative_dy;
 
        if (tdx || tdy) {
-               _cumulative_dx += tdx;
+               _cumulative_dx = dx_qn;
                _cumulative_dy += tdy;
 
                int8_t note_delta = total_dy();
 
                if (tdx || tdy) {
-                       _region->move_selection (tdx, tdy, note_delta);
+                       if (_copy) {
+                               _region->move_copies (dx_qn, tdy, note_delta);
+                       } else {
+                               _region->move_selection (dx_qn, tdy, note_delta);
+                       }
 
                        /* the new note value may be the same as the old one, but we
                         * don't know what that means because the selection may have
@@ -5827,7 +5873,7 @@ NoteDrag::finished (GdkEvent* ev, bool moved)
                        }
                }
        } else {
-               _region->note_dropped (_primary, total_dx (ev->button.state), total_dy());
+               _region->note_dropped (_primary, total_dx (ev), total_dy(), _copy);
        }
 }
 
@@ -6608,10 +6654,10 @@ RegionCutDrag::start_grab (GdkEvent* event, Gdk::Cursor* c)
 void
 RegionCutDrag::motion (GdkEvent* event, bool)
 {
-       framepos_t pos = _drags->current_pointer_frame();
+       MusicFrame pos (_drags->current_pointer_frame(), 0);
        _editor->snap_to_with_modifier (pos, event);
 
-       line->set_position (pos);
+       line->set_position (pos.frame);
 }
 
 void
@@ -6619,19 +6665,18 @@ RegionCutDrag::finished (GdkEvent* event, bool)
 {
        _editor->get_track_canvas()->canvas()->re_enter();
 
-       framepos_t pos = _drags->current_pointer_frame();
-       _editor->snap_to_with_modifier (pos, event);
 
+       MusicFrame pos (_drags->current_pointer_frame(), 0);
+       _editor->snap_to_with_modifier (pos, event);
        line->hide ();
 
-       RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos);
+       RegionSelection rs = _editor->get_regions_from_selection_and_mouse (pos.frame);
 
        if (rs.empty()) {
                return;
        }
 
-       _editor->split_regions_at (pos, rs, _editor->get_grid_music_divisions (event->button.state),
-                                  false);
+       _editor->split_regions_at (pos, rs, false);
 }
 
 void