Spelling correction patch from Debian
[ardour.git] / gtk2_ardour / midi_region_view.cc
index 6d4555731fbc203b1429ed62529a729ba6f153af..c00cc9b56523bce3d625c623ec29229f3a778d74 100644 (file)
@@ -33,6 +33,7 @@
 #include "pbd/stateful_diff_command.h"
 
 #include "ardour/midi_model.h"
+#include "ardour/midi_playlist.h"
 #include "ardour/midi_region.h"
 #include "ardour/midi_source.h"
 #include "ardour/midi_track.h"
 #include "streamview.h"
 #include "patch_change_dialog.h"
 #include "verbose_cursor.h"
-#include "ardour_ui.h"
 #include "note.h"
 #include "hit.h"
 #include "patch_change.h"
 #include "sys_ex.h"
+#include "ui_config.h"
 
 #include "i18n.h"
 
@@ -89,8 +90,6 @@ using namespace Editing;
 using namespace std;
 using Gtkmm2ext::Keyboard;
 
-PBD::Signal1<void, MidiRegionView *> MidiRegionView::SelectionCleared;
-
 #define MIDI_BP_ZERO ((Config->get_first_midi_bank_is_zero())?0:1)
 
 MidiRegionView::MidiRegionView (ArdourCanvas::Container*      parent,
@@ -103,6 +102,7 @@ MidiRegionView::MidiRegionView (ArdourCanvas::Container*      parent,
        , _current_range_max(0)
        , _region_relative_time_converter(r->session().tempo_map(), r->position())
        , _source_relative_time_converter(r->session().tempo_map(), r->position() - r->start())
+       , _region_relative_time_converter_double(r->session().tempo_map(), r->position())
        , _active_notes(0)
        , _note_group (new ArdourCanvas::Container (group))
        , _note_diff_command (0)
@@ -123,6 +123,7 @@ MidiRegionView::MidiRegionView (ArdourCanvas::Container*      parent,
        , _last_event_y (0)
        , _grabbed_keyboard (false)
        , _entered (false)
+       , _note_entered (false)
        , _mouse_changed_selection (false)
 {
        CANVAS_DEBUG_NAME (_note_group, string_compose ("note group for %1", get_item_name()));
@@ -131,11 +132,6 @@ MidiRegionView::MidiRegionView (ArdourCanvas::Container*      parent,
 
        Config->ParameterChanged.connect (*this, invalidator (*this), boost::bind (&MidiRegionView::parameter_changed, this, _1), gui_context());
        connect_to_diskstream ();
-
-       SelectionCleared.connect (_selection_cleared_connection, invalidator (*this), boost::bind (&MidiRegionView::selection_cleared, this, _1), gui_context ());
-
-       PublicEditor& editor (trackview.editor());
-       editor.get_selection().ClearMidiNoteSelection.connect (_clear_midi_selection_connection, invalidator (*this), boost::bind (&MidiRegionView::clear_midi_selection, this), gui_context ());
 }
 
 MidiRegionView::MidiRegionView (ArdourCanvas::Container*      parent,
@@ -150,6 +146,7 @@ MidiRegionView::MidiRegionView (ArdourCanvas::Container*      parent,
        , _current_range_max(0)
        , _region_relative_time_converter(r->session().tempo_map(), r->position())
        , _source_relative_time_converter(r->session().tempo_map(), r->position() - r->start())
+       , _region_relative_time_converter_double(r->session().tempo_map(), r->position())
        , _active_notes(0)
        , _note_group (new ArdourCanvas::Container (group))
        , _note_diff_command (0)
@@ -170,6 +167,7 @@ MidiRegionView::MidiRegionView (ArdourCanvas::Container*      parent,
        , _last_event_y (0)
        , _grabbed_keyboard (false)
        , _entered (false)
+       , _note_entered (false)
        , _mouse_changed_selection (false)
 {
        CANVAS_DEBUG_NAME (_note_group, string_compose ("note group for %1", get_item_name()));
@@ -178,11 +176,6 @@ MidiRegionView::MidiRegionView (ArdourCanvas::Container*      parent,
        PublicEditor::DropDownKeys.connect (sigc::mem_fun (*this, &MidiRegionView::drop_down_keys));
 
        connect_to_diskstream ();
-
-       SelectionCleared.connect (_selection_cleared_connection, invalidator (*this), boost::bind (&MidiRegionView::selection_cleared, this, _1), gui_context ());
-
-       PublicEditor& editor (trackview.editor());
-       editor.get_selection().ClearMidiNoteSelection.connect (_clear_midi_selection_connection, invalidator (*this), boost::bind (&MidiRegionView::clear_midi_selection, this), gui_context ());
 }
 
 void
@@ -202,6 +195,7 @@ MidiRegionView::MidiRegionView (const MidiRegionView& other)
        , _current_range_max(0)
        , _region_relative_time_converter(other.region_relative_time_converter())
        , _source_relative_time_converter(other.source_relative_time_converter())
+       , _region_relative_time_converter_double(other.region_relative_time_converter_double())
        , _active_notes(0)
        , _note_group (new ArdourCanvas::Container (get_canvas_group()))
        , _note_diff_command (0)
@@ -222,6 +216,7 @@ MidiRegionView::MidiRegionView (const MidiRegionView& other)
        , _last_event_y (0)
        , _grabbed_keyboard (false)
        , _entered (false)
+       , _note_entered (false)
        , _mouse_changed_selection (false)
 {
        init (false);
@@ -233,6 +228,7 @@ MidiRegionView::MidiRegionView (const MidiRegionView& other, boost::shared_ptr<M
        , _current_range_max(0)
        , _region_relative_time_converter(other.region_relative_time_converter())
        , _source_relative_time_converter(other.source_relative_time_converter())
+       , _region_relative_time_converter_double(other.region_relative_time_converter_double())
        , _active_notes(0)
        , _note_group (new ArdourCanvas::Container (get_canvas_group()))
        , _note_diff_command (0)
@@ -253,6 +249,7 @@ MidiRegionView::MidiRegionView (const MidiRegionView& other, boost::shared_ptr<M
        , _last_event_y (0)
        , _grabbed_keyboard (false)
        , _entered (false)
+       , _note_entered (false)
        , _mouse_changed_selection (false)
 {
        init (true);
@@ -263,10 +260,6 @@ MidiRegionView::init (bool wfd)
 {
        PublicEditor::DropDownKeys.connect (sigc::mem_fun (*this, &MidiRegionView::drop_down_keys));
 
-       NoteBase::NoteBaseDeleted.connect (note_delete_connection, MISSING_INVALIDATOR,
-                                          boost::bind (&MidiRegionView::maybe_remove_deleted_note_from_selection, this, _1),
-                                          gui_context());
-       
        if (wfd) {
                Glib::Threads::Mutex::Lock lm(midi_region()->midi_source(0)->mutex());
                midi_region()->midi_source(0)->load_model(lm);
@@ -298,7 +291,7 @@ MidiRegionView::init (bool wfd)
 
        group->raise_to_top();
 
-       midi_view()->midi_track()->PlaybackChannelModeChanged.connect (_channel_mode_changed_connection, invalidator (*this),
+       midi_view()->midi_track()->playback_filter().ChannelModeChanged.connect (_channel_mode_changed_connection, invalidator (*this),
                                                                       boost::bind (&MidiRegionView::midi_channel_mode_changed, this),
                                                                       gui_context ());
 
@@ -315,11 +308,6 @@ MidiRegionView::init (bool wfd)
 
        Config->ParameterChanged.connect (*this, invalidator (*this), boost::bind (&MidiRegionView::parameter_changed, this, _1), gui_context());
        connect_to_diskstream ();
-
-       SelectionCleared.connect (_selection_cleared_connection, invalidator (*this), boost::bind (&MidiRegionView::selection_cleared, this, _1), gui_context ());
-
-       PublicEditor& editor (trackview.editor());
-       editor.get_selection().ClearMidiNoteSelection.connect (_clear_midi_selection_connection, invalidator (*this), boost::bind (&MidiRegionView::clear_midi_selection, this), gui_context ());
 }
 
 InstrumentInfo&
@@ -390,7 +378,6 @@ MidiRegionView::canvas_group_event(GdkEvent* ev)
 
        case GDK_BUTTON_RELEASE:
                r = button_release (&ev->button);
-               _note_player.reset();
                return r;
 
        case GDK_MOTION_NOTIFY:
@@ -430,13 +417,26 @@ MidiRegionView::mouse_mode_changed ()
        set_frame_color();
 
        if (_entered) {
-               if (trackview.editor().internal_editing()) {
-                       // Switched in to internal editing mode while entered
-                       enter_internal();
-               } else {
-                       // Switched out of internal editing mode while entered
+               if (!trackview.editor().internal_editing()) {
+                       /* Switched out of internal editing mode while entered.
+                       Only necessary for leave as a mouse_mode_change over a region
+                       automatically triggers an enter event. */
                        leave_internal();
                }
+               else if (trackview.editor().current_mouse_mode() == MouseContent) {
+                       // hide cursor and ghost note after changing to internal edit mode
+                       remove_ghost_note ();
+
+                       /* XXX This is problematic as the function is executed for every region
+                       and only for one region _note_entered can be true. Still it's
+                       necessary as to hide the verbose cursor when we're changing from
+                       draw mode to internal edit mode. These lines are the reason why
+                       in some situations no verbose cursor is shown when we enter internal
+                       edit mode over a note. */
+                       if (!_note_entered) {
+                               hide_verbose_cursor ();
+                       }
+               }
        }
 }
 
@@ -466,8 +466,9 @@ MidiRegionView::enter_internal()
 void
 MidiRegionView::leave_internal()
 {
-       trackview.editor().verbose_cursor()->hide ();
+       hide_verbose_cursor ();
        remove_ghost_note ();
+       _note_entered = false;
 
        if (_grabbed_keyboard) {
                Keyboard::magic_widget_drop_focus();
@@ -498,10 +499,10 @@ MidiRegionView::button_press (GdkEventButton* ev)
        }
 
        if (_mouse_state != SelectTouchDragging) {
-               
+
                _pressed_button = ev->button;
                _mouse_state = Pressed;
-               
+
                return true;
        }
 
@@ -535,15 +536,14 @@ MidiRegionView::button_release (GdkEventButton* ev)
 
                switch (editor.current_mouse_mode()) {
                case MouseRange:
-                       /* no motion occured - simple click */
-                       clear_selection ();
+                       /* no motion occurred - simple click */
+                       clear_editor_note_selection ();
                        _mouse_changed_selection = true;
                        break;
 
                case MouseContent:
                case MouseTimeFX:
                        {
-                               clear_selection();
                                _mouse_changed_selection = true;
 
                                if (Keyboard::is_insert_note_event(ev)) {
@@ -555,13 +555,9 @@ MidiRegionView::button_release (GdkEventButton* ev)
                                        group->canvas_to_item (event_x, event_y);
 
                                        Evoral::Beats beats = get_grid_beats(editor.pixel_to_sample(event_x));
-
-                                       /* Shorten the length by 1 tick so that we can add a new note at the next
-                                          grid snap without it overlapping this one.
-                                       */
-                                       beats -= Evoral::Beats::tick();
-
                                        create_note_at (editor.pixel_to_sample (event_x), event_y, beats, true);
+                               } else {
+                                       clear_editor_note_selection ();
                                }
 
                                break;
@@ -569,14 +565,7 @@ MidiRegionView::button_release (GdkEventButton* ev)
                case MouseDraw:
                        {
                                Evoral::Beats beats = get_grid_beats(editor.pixel_to_sample(event_x));
-
-                               /* Shorten the length by 1 tick so that we can add a new note at the next
-                                  grid snap without it overlapping this one.
-                               */
-                               beats -= Evoral::Beats::tick();
-                               
                                create_note_at (editor.pixel_to_sample (event_x), event_y, beats, true);
-
                                break;
                        }
                default:
@@ -586,11 +575,12 @@ MidiRegionView::button_release (GdkEventButton* ev)
                _mouse_state = None;
                break;
 
-       case SelectRectDragging:
        case AddDragging:
+               /* Only create a ghost note when we added a note, not when we were drag-selecting. */
+               create_ghost_note (ev->x, ev->y);
+       case SelectRectDragging:
                editor.drags()->end_grab ((GdkEvent *) ev);
                _mouse_state = None;
-               create_ghost_note (ev->x, ev->y);
                break;
 
 
@@ -599,7 +589,7 @@ MidiRegionView::button_release (GdkEventButton* ev)
        }
 
        if (_mouse_changed_selection) {
-               trackview.editor().begin_reversible_selection_op (_("Mouse Selection Change"));
+               trackview.editor().begin_reversible_selection_op (X_("Mouse Selection Change"));
                trackview.editor().commit_reversible_selection_op ();
        }
 
@@ -611,25 +601,33 @@ MidiRegionView::motion (GdkEventMotion* ev)
 {
        PublicEditor& editor = trackview.editor ();
 
-       if (!_ghost_note && editor.current_mouse_mode() == MouseContent &&
-           Keyboard::modifier_state_contains (ev->state, Keyboard::insert_note_modifier()) &&
-           _mouse_state != AddDragging) {
+       if (!_note_entered) {
 
-               create_ghost_note (ev->x, ev->y);
+               if (!_ghost_note && editor.current_mouse_mode() == MouseContent &&
+                   Keyboard::modifier_state_contains (ev->state, Keyboard::insert_note_modifier()) &&
+                   _mouse_state != AddDragging) {
 
-       } else if (_ghost_note && editor.current_mouse_mode() == MouseContent &&
-                  Keyboard::modifier_state_contains (ev->state, Keyboard::insert_note_modifier())) {
+                       create_ghost_note (ev->x, ev->y);
 
-               update_ghost_note (ev->x, ev->y);
+               } else if (_ghost_note && editor.current_mouse_mode() == MouseContent &&
+                          Keyboard::modifier_state_contains (ev->state, Keyboard::insert_note_modifier())) {
 
-       } else if (_ghost_note && editor.current_mouse_mode() == MouseContent) {
+                       update_ghost_note (ev->x, ev->y);
 
-               remove_ghost_note ();
-               editor.verbose_cursor()->hide ();
+               } else if (_ghost_note && editor.current_mouse_mode() == MouseContent) {
+
+                       remove_ghost_note ();
+                       hide_verbose_cursor ();
 
-       } else if (_ghost_note && editor.current_mouse_mode() == MouseDraw) {
+               } else if (editor.current_mouse_mode() == MouseDraw) {
 
-               update_ghost_note (ev->x, ev->y);
+                       if (_ghost_note) {
+                               update_ghost_note (ev->x, ev->y);
+                       }
+                       else {
+                               create_ghost_note (ev->x, ev->y);
+                       }
+               }
        }
 
        /* any motion immediately hides velocity text that may have been visible */
@@ -642,19 +640,19 @@ MidiRegionView::motion (GdkEventMotion* ev)
        case Pressed:
 
                if (_pressed_button == 1) {
-                       
+
                        MouseMode m = editor.current_mouse_mode();
-                       
+
                        if (m == MouseDraw || (m == MouseContent && Keyboard::modifier_state_contains (ev->state, Keyboard::insert_note_modifier()))) {
                                editor.drags()->set (new NoteCreateDrag (dynamic_cast<Editor *> (&editor), group, this), (GdkEvent *) ev);
                                _mouse_state = AddDragging;
                                remove_ghost_note ();
-                               editor.verbose_cursor()->hide ();
+                               hide_verbose_cursor ();
                                return true;
                        } else if (m == MouseContent) {
                                editor.drags()->set (new MidiRubberbandSelectDrag (dynamic_cast<Editor *> (&editor), this), (GdkEvent *) ev);
                                if (!Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
-                                       clear_selection ();
+                                       clear_editor_note_selection ();
                                        _mouse_changed_selection = true;
                                }
                                _mouse_state = SelectRectDragging;
@@ -673,7 +671,7 @@ MidiRegionView::motion (GdkEventMotion* ev)
        case AddDragging:
                editor.drags()->motion_handler ((GdkEvent *) ev, false);
                break;
-               
+
        case SelectTouchDragging:
                return false;
 
@@ -682,7 +680,7 @@ MidiRegionView::motion (GdkEventMotion* ev)
 
        }
 
-       /* we may be dragging some non-note object (eg. patch-change, sysex) 
+       /* we may be dragging some non-note object (eg. patch-change, sysex)
         */
 
        return editor.drags()->motion_handler ((GdkEvent *) ev, false);
@@ -696,17 +694,19 @@ MidiRegionView::scroll (GdkEventScroll* ev)
                return false;
        }
 
-       if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
-               /* XXX: bit of a hack; allow PrimaryModifier scroll through so that
-                  it still works for zoom.
+       if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier) ||
+           Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
+               /* XXX: bit of a hack; allow PrimaryModifier and TertiaryModifier scroll
+                * through so that it still works for navigation.
                */
                return false;
        }
 
-       trackview.editor().verbose_cursor()->hide ();
+       hide_verbose_cursor ();
 
        bool fine = !Keyboard::modifier_state_contains (ev->state, Keyboard::SecondaryModifier);
-       bool together = Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier);
+       Keyboard::ModifierMask mask_together(Keyboard::PrimaryModifier|Keyboard::TertiaryModifier);
+       bool together = Keyboard::modifier_state_contains (ev->state, mask_together);
 
        if (ev->direction == GDK_SCROLL_UP) {
                change_velocities (true, fine, false, together);
@@ -729,13 +729,13 @@ MidiRegionView::key_press (GdkEventKey* ev)
        */
 
        bool unmodified = Keyboard::no_modifier_keys_pressed (ev);
-       
+
        if (unmodified && (ev->keyval == GDK_Alt_L || ev->keyval == GDK_Alt_R)) {
                _mouse_state = SelectTouchDragging;
                return true;
 
        } else if (ev->keyval == GDK_Escape && unmodified) {
-               clear_selection();
+               clear_editor_note_selection ();
                _mouse_state = None;
 
        } else if (ev->keyval == GDK_comma || ev->keyval == GDK_period) {
@@ -760,7 +760,7 @@ MidiRegionView::key_press (GdkEventKey* ev)
 
        } else if (ev->keyval == GDK_Tab || ev->keyval == GDK_ISO_Left_Tab) {
 
-               trackview.editor().begin_reversible_selection_op (_("Select Adjacent Note"));
+               trackview.editor().begin_reversible_selection_op (X_("Select Adjacent Note"));
 
                if (Keyboard::modifier_state_contains (ev->state, Keyboard::PrimaryModifier)) {
                        goto_previous_note (Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier));
@@ -874,7 +874,7 @@ MidiRegionView::velocity_edit ()
        if (_selection.empty()) {
                return;
        }
-       
+
        /* pick a note somewhat at random (since Selection is a set<>) to
         * provide the "current" velocity for the dialog.
         */
@@ -951,19 +951,21 @@ MidiRegionView::create_note_at (framepos_t t, double y, Evoral::Beats length, bo
 
        view->update_note_range(new_note->note());
 
-       trackview.editor().begin_reversible_command(_("add note"));
-       MidiModel::NoteDiffCommand* cmd = _model->new_note_diff_command(_("add note"));
-       cmd->add (new_note);
-       _model->apply_command(*trackview.session(), cmd);
-       trackview.editor().commit_reversible_command();
+       start_note_diff_command(_("add note"));
+
+       clear_editor_note_selection ();
+       note_diff_add_note (new_note, true, false);
+
+       apply_diff();
 
        play_midi_note (new_note);
 }
 
 void
-MidiRegionView::clear_events (bool with_selection_signal)
+MidiRegionView::clear_events ()
 {
-       clear_selection (with_selection_signal);
+       // clear selection without signaling
+       clear_selection_internal ();
 
        MidiGhostRegion* gr;
        for (std::vector<GhostRegion*>::iterator g = ghosts.begin(); g != ghosts.end(); ++g) {
@@ -990,7 +992,7 @@ MidiRegionView::display_model(boost::shared_ptr<MidiModel> model)
        content_connection.disconnect ();
        _model->ContentsChanged.connect (content_connection, invalidator (*this), boost::bind (&MidiRegionView::redisplay_model, this), gui_context());
        /* Don't signal as nobody else needs to know until selection has been altered. */
-       clear_events (false);
+       clear_events ();
 
        if (_enable_display) {
                redisplay_model();
@@ -1065,6 +1067,9 @@ MidiRegionView::apply_diff (bool as_subcommand)
                }
        }
 
+       midi_view()->midi_track()->midi_playlist()->region_edited(
+               _region, _note_diff_command);
+
        if (as_subcommand) {
                _model->apply_command_as_subcommand (*trackview.session(), _note_diff_command);
        } else {
@@ -1073,7 +1078,6 @@ MidiRegionView::apply_diff (bool as_subcommand)
        }
 
        _note_diff_command = 0;
-       midi_view()->midi_track()->playlist_modified();
 
        if (add_or_remove) {
                _marked_for_selection.clear();
@@ -1090,7 +1094,7 @@ MidiRegionView::abort_command()
 {
        delete _note_diff_command;
        _note_diff_command = 0;
-       clear_selection();
+       clear_editor_note_selection();
 }
 
 NoteBase*
@@ -1184,7 +1188,7 @@ MidiRegionView::redisplay_model()
                bool visible;
 
                if (note_in_region_range (note, visible)) {
-                       
+
                        if (!empty_when_starting && (cne = find_canvas_note (note)) != 0) {
 
                                cne->validate ();
@@ -1209,7 +1213,7 @@ MidiRegionView::redisplay_model()
                        }
 
                } else {
-                       
+
                        if (!empty_when_starting && (cne = find_canvas_note (note)) != 0) {
                                cne->validate ();
                                cne->hide ();
@@ -1222,17 +1226,17 @@ MidiRegionView::redisplay_model()
        if (!empty_when_starting) {
                for (Events::iterator i = _events.begin(); i != _events.end(); ) {
                        if (!(*i)->valid ()) {
-                               
+
                                for (vector<GhostRegion*>::iterator j = ghosts.begin(); j != ghosts.end(); ++j) {
                                        MidiGhostRegion* gr = dynamic_cast<MidiGhostRegion*> (*j);
                                        if (gr) {
                                                gr->remove_note (*i);
                                        }
                                }
-                               
+
                                delete *i;
                                i = _events.erase (i);
-                               
+
                        } else {
                                ++i;
                        }
@@ -1291,12 +1295,12 @@ MidiRegionView::display_sysexes()
        bool have_periodic_system_messages = false;
        bool display_periodic_messages = true;
 
-       if (!ARDOUR_UI::config()->get_never_display_periodic_midi()) {
+       if (!UIConfiguration::instance().get_never_display_periodic_midi()) {
 
                for (MidiModel::SysExes::const_iterator i = _model->sysexes().begin(); i != _model->sysexes().end(); ++i) {
-                       const boost::shared_ptr<const Evoral::MIDIEvent<Evoral::Beats> > mev = 
+                       const boost::shared_ptr<const Evoral::MIDIEvent<Evoral::Beats> > mev =
                                boost::static_pointer_cast<const Evoral::MIDIEvent<Evoral::Beats> > (*i);
-                       
+
                        if (mev) {
                                if (mev->is_spp() || mev->is_mtc_quarter() || mev->is_mtc_full()) {
                                        have_periodic_system_messages = true;
@@ -1304,22 +1308,22 @@ MidiRegionView::display_sysexes()
                                }
                        }
                }
-               
+
                if (have_periodic_system_messages) {
                        double zoom = trackview.editor().get_current_zoom (); // frames per pixel
-                       
+
                        /* get an approximate value for the number of samples per video frame */
-                       
+
                        double video_frame = trackview.session()->frame_rate() * (1.0/30);
-                       
+
                        /* if we are zoomed out beyond than the cutoff (i.e. more
                         * frames per pixel than frames per 4 video frames), don't
                         * show periodic sysex messages.
                         */
-                       
+
                        if (zoom > (video_frame*4)) {
                                display_periodic_messages = false;
-                       } 
+                       }
                }
        } else {
                display_periodic_messages = false;
@@ -1327,7 +1331,7 @@ MidiRegionView::display_sysexes()
 
        for (MidiModel::SysExes::const_iterator i = _model->sysexes().begin(); i != _model->sysexes().end(); ++i) {
 
-               const boost::shared_ptr<const Evoral::MIDIEvent<Evoral::Beats> > mev = 
+               const boost::shared_ptr<const Evoral::MIDIEvent<Evoral::Beats> > mev =
                        boost::static_pointer_cast<const Evoral::MIDIEvent<Evoral::Beats> > (*i);
 
                Evoral::Beats time = (*i)->time();
@@ -1375,9 +1379,7 @@ MidiRegionView::~MidiRegionView ()
 {
        in_destructor = true;
 
-       trackview.editor().verbose_cursor()->hide ();
-
-       note_delete_connection.disconnect ();
+       hide_verbose_cursor ();
 
        delete _list_editor;
 
@@ -1387,10 +1389,8 @@ MidiRegionView::~MidiRegionView ()
                end_write();
        }
 
-       _selection_cleared_connection.disconnect ();
-
        _selection.clear();
-       clear_events (false);
+       clear_events ();
 
        delete _note_group;
        delete _note_diff_command;
@@ -1405,6 +1405,7 @@ MidiRegionView::region_resized (const PropertyChange& what_changed)
 
        if (what_changed.contains (ARDOUR::Properties::position)) {
                _region_relative_time_converter.set_origin_b(_region->position());
+               _region_relative_time_converter_double.set_origin_b(_region->position());
                set_duration(_region->length(), 0);
                if (_enable_display) {
                        redisplay_model();
@@ -1495,6 +1496,21 @@ MidiRegionView::apply_note_range (uint8_t min, uint8_t max, bool force)
                        const double y0 = 1. + floor (midi_stream_view()->note_to_y(note->note()));
                        const double y1 = y0 + std::max(1., floor(midi_stream_view()->note_height()) - 1.);
 
+                       if (y0 < 0 || y1 >= _height) {
+                               /* During DnD, the region uses the 'old/current'
+                                * midi_stream_view()'s range and its position/height calculation.
+                                *
+                                * Ideally DnD would decouple the midi_stream_view() for the
+                                * region(s) being dragged and set it to the target's range
+                                * (or in case of the drop-zone, FullRange).
+                                * but I don't see how this can be done without major rework.
+                                *
+                                * For now, just prevent visual bleeding of events in case
+                                * the target-track is smaller.
+                                */
+                               event->hide();
+                               continue;
+                       }
                        cnote->set_y0 (y0);
                        cnote->set_y1 (y1);
 
@@ -1515,9 +1531,9 @@ MidiRegionView::add_ghost (TimeAxisView& tv)
                /* if ghost is inserted into midi track, use a dedicated midi ghost canvas group
                   to allow having midi notes on top of note lines and waveforms.
                */
-               ghost = new MidiGhostRegion (*mtv->midi_view(), trackview, unit_position);
+               ghost = new MidiGhostRegion (*this, *mtv->midi_view(), trackview, unit_position);
        } else {
-               ghost = new MidiGhostRegion (tv, trackview, unit_position);
+               ghost = new MidiGhostRegion (*this, tv, trackview, unit_position);
        }
 
        for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
@@ -1528,8 +1544,6 @@ MidiRegionView::add_ghost (TimeAxisView& tv)
        ghost->set_duration (_region->length() / samples_per_pixel);
        ghosts.push_back (ghost);
 
-       GhostRegion::CatchDeletion.connect (*this, invalidator (*this), boost::bind (&RegionView::remove_ghost, this, _1), gui_context());
-
        return ghost;
 }
 
@@ -1606,7 +1620,7 @@ MidiRegionView::extend_active_notes()
 void
 MidiRegionView::play_midi_note(boost::shared_ptr<NoteType> note)
 {
-       if (_no_sound_notes || !ARDOUR_UI::config()->get_sound_midi_notes()) {
+       if (_no_sound_notes || !UIConfiguration::instance().get_sound_midi_notes()) {
                return;
        }
 
@@ -1633,7 +1647,7 @@ MidiRegionView::start_playing_midi_note(boost::shared_ptr<NoteType> note)
 void
 MidiRegionView::start_playing_midi_chord (vector<boost::shared_ptr<NoteType> > notes)
 {
-       if (_no_sound_notes || !ARDOUR_UI::config()->get_sound_midi_notes()) {
+       if (_no_sound_notes || !UIConfiguration::instance().get_sound_midi_notes()) {
                return;
        }
 
@@ -1643,21 +1657,25 @@ MidiRegionView::start_playing_midi_chord (vector<boost::shared_ptr<NoteType> > n
                return;
        }
 
-       _note_player = boost::shared_ptr<NotePlayer>(new NotePlayer(route_ui->midi_track()));
+       NotePlayer* player = new NotePlayer (route_ui->midi_track());
 
        for (vector<boost::shared_ptr<NoteType> >::iterator n = notes.begin(); n != notes.end(); ++n) {
-               _note_player->add (*n);
+               player->add (*n);
        }
 
-       _note_player->on ();
+       player->play ();
 }
 
 
 bool
 MidiRegionView::note_in_region_range (const boost::shared_ptr<NoteType> note, bool& visible) const
 {
+       /* This is imprecise due to all the conversion conversion involved, so only
+          hide notes if they seem to start more than one tick before the start. */
+       const framecnt_t tick_frames       = Evoral::Beats::tick().to_ticks(trackview.session()->frame_rate());
        const framepos_t note_start_frames = source_beats_to_region_frames (note->time());
-       bool outside = (note_start_frames  < 0) || (note_start_frames > _region->last_frame());
+       const bool       outside           = ((note_start_frames <= -tick_frames) ||
+                                             (note_start_frames >= _region->length()));
 
        visible = (note->note() >= midi_stream_view()->lowest_note()) &&
                (note->note() <= midi_stream_view()->highest_note());
@@ -1695,9 +1713,9 @@ MidiRegionView::update_sustained (Note* ev, bool update_ghost_regions)
 
        if (note->length() > 0) {
                const framepos_t note_end_frames = min (source_beats_to_region_frames (note->end_time()), _region->length());
-               ev->set_x1 (trackview.editor().sample_to_pixel (note_end_frames));
+               ev->set_x1 (std::max(1., trackview.editor().sample_to_pixel (note_end_frames)) - 1);
        } else {
-               ev->set_x1 (trackview.editor().sample_to_pixel (_region->length()));
+               ev->set_x1 (std::max(1., trackview.editor().sample_to_pixel (_region->length())) - 1);
        }
 
        ev->set_y1 (y0 + std::max(1., floor(midi_stream_view()->note_height()) - 1));
@@ -1747,6 +1765,13 @@ MidiRegionView::update_hit (Hit* ev, bool update_ghost_regions)
        const double diamond_size = std::max(1., floor(midi_stream_view()->note_height()) - 2.);
        const double y = 1.5 + floor(midi_stream_view()->note_to_y(note->note())) + diamond_size * .5;
 
+       // see DnD note in MidiRegionView::apply_note_range() above
+       if (y <= 0 || y >= _height) {
+               ev->hide();
+       } else {
+               ev->show();
+       }
+
        ev->set_position (ArdourCanvas::Duple (x, y));
        ev->set_height (diamond_size);
 
@@ -1852,10 +1877,12 @@ MidiRegionView::step_add_note (uint8_t channel, uint8_t number, uint8_t velocity
        view->update_note_range(new_note->note());
 
        _marked_for_selection.clear ();
-       clear_selection ();
 
        start_note_diff_command (_("step add"));
+
+       clear_editor_note_selection ();
        note_diff_add_note (new_note, true, false);
+
        apply_diff();
 
        // last_step_edit_note = new_note;
@@ -1919,8 +1946,8 @@ patch_applies (const ARDOUR::MidiModel::constPatchChangePtr pc, Evoral::Beats ti
 {
        return pc->time() <= time && pc->channel() == channel;
 }
-       
-void 
+
+void
 MidiRegionView::get_patch_key_at (Evoral::Beats time, uint8_t channel, MIDI::Name::PatchPrimaryKey& key) const
 {
        // The earliest event not before time
@@ -2062,7 +2089,7 @@ MidiRegionView::step_patch (PatchChange& patch, bool bank, int delta)
 }
 
 void
-MidiRegionView::maybe_remove_deleted_note_from_selection (NoteBase* cne)
+MidiRegionView::note_deleted (NoteBase* cne)
 {
        if (_selection.empty()) {
                return;
@@ -2089,6 +2116,7 @@ MidiRegionView::delete_selection()
        _selection.clear();
 
        apply_diff ();
+       hide_verbose_cursor ();
 }
 
 void
@@ -2098,69 +2126,54 @@ MidiRegionView::delete_note (boost::shared_ptr<NoteType> n)
        _note_diff_command->remove (n);
        apply_diff ();
 
-       trackview.editor().verbose_cursor()->hide ();
+       hide_verbose_cursor ();
 }
 
 void
-MidiRegionView::clear_selection_except (NoteBase* ev, bool signal)
+MidiRegionView::clear_editor_note_selection ()
 {
-       for (Selection::iterator i = _selection.begin(); i != _selection.end(); ) {
-               if ((*i) != ev) {
-                       Selection::iterator tmp = i;
-                       ++tmp;
+       DEBUG_TRACE(DEBUG::Selection, "MRV::clear_editor_note_selection\n");
+       PublicEditor& editor(trackview.editor());
+       editor.get_selection().clear_midi_notes();
+}
 
-                       (*i)->set_selected (false);
-                       (*i)->hide_velocity ();
-                       _selection.erase (i);
+void
+MidiRegionView::clear_selection ()
+{
+       clear_selection_internal();
+       PublicEditor& editor(trackview.editor());
+       editor.get_selection().remove(this);
+}
 
-                       i = tmp;
-               } else {
-                       ++i;
-               }
+void
+MidiRegionView::clear_selection_internal ()
+{
+       DEBUG_TRACE(DEBUG::Selection, "MRV::clear_selection_internal\n");
+
+       for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
+               (*i)->set_selected(false);
+               (*i)->hide_velocity();
        }
+       _selection.clear();
 
-       if (!ev && _entered) {
+       if (_entered) {
                // Clearing selection entirely, ungrab keyboard
                Keyboard::magic_widget_drop_focus();
                _grabbed_keyboard = false;
        }
-
-       /* this does not change the status of this regionview w.r.t the editor
-          selection.
-       */
-
-       if (signal) {
-               SelectionCleared (this); /* EMIT SIGNAL */
-       }
 }
 
 void
 MidiRegionView::unique_select(NoteBase* ev)
 {
-       const bool selection_was_empty = _selection.empty();
-
-       clear_selection_except (ev);
-
-       /* don't bother with checking to see if we should remove this
-          regionview from the editor selection, since we're about to add
-          another note, and thus put/keep this regionview in the editor
-          selection anyway.
-       */
-
-       if (!ev->selected()) {
-               add_to_selection (ev);
-               if (selection_was_empty && _entered) {
-                       // Grab keyboard for moving notes with arrow keys
-                       Keyboard::magic_widget_grab_focus();
-                       _grabbed_keyboard = true;
-               }
-       }
+       clear_editor_note_selection();
+       add_to_selection(ev);
 }
 
 void
 MidiRegionView::select_all_notes ()
 {
-       clear_selection ();
+       clear_editor_note_selection ();
 
        for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
                add_to_selection (*i);
@@ -2170,7 +2183,7 @@ MidiRegionView::select_all_notes ()
 void
 MidiRegionView::select_range (framepos_t start, framepos_t end)
 {
-       clear_selection ();
+       clear_editor_note_selection ();
 
        for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
                framepos_t t = source_beats_to_absolute_frames((*i)->note()->time());
@@ -2218,13 +2231,13 @@ MidiRegionView::select_matching_notes (uint8_t notenum, uint16_t channel_mask, b
        uint8_t high_note = 0;
        MidiModel::Notes& notes (_model->notes());
        _optimization_iterator = _events.begin();
-       
+
        if (extend && !have_selection) {
                extend = false;
        }
 
        /* scan existing selection to get note range */
-       
+
        for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
                if ((*i)->note()->note() < low_note) {
                        low_note = (*i)->note()->note();
@@ -2233,9 +2246,9 @@ MidiRegionView::select_matching_notes (uint8_t notenum, uint16_t channel_mask, b
                        high_note = (*i)->note()->note();
                }
        }
-       
+
        if (!add) {
-               clear_selection ();
+               clear_editor_note_selection ();
 
                if (!extend && (low_note == high_note) && (high_note == notenum)) {
                        /* only note previously selected is the one we are
@@ -2310,11 +2323,8 @@ void
 MidiRegionView::note_selected (NoteBase* ev, bool add, bool extend)
 {
        if (!add) {
-               clear_selection_except (ev);
-               if (!_selection.empty()) {
-                       PublicEditor& editor (trackview.editor());
-                       editor.get_selection().add (this);
-               }
+               clear_editor_note_selection();
+               add_to_selection (ev);
        }
 
        if (!extend) {
@@ -2500,7 +2510,7 @@ MidiRegionView::move_selection(double dx, double dy, double cumulative_dy)
                (*i)->move_event(dx, dy);
        }
 
-       if (dy && !_selection.empty() && !_no_sound_notes && ARDOUR_UI::config()->get_sound_midi_notes()) {
+       if (dy && !_selection.empty() && !_no_sound_notes && UIConfiguration::instance().get_sound_midi_notes()) {
 
                if (to_play.size() > 1) {
 
@@ -2556,7 +2566,7 @@ MidiRegionView::note_dropped(NoteBase *, frameoffset_t dt, int8_t dnote)
        start_note_diff_command (_("move notes"));
 
        for (Selection::iterator i = _selection.begin(); i != _selection.end() ; ++i) {
-               
+
                framepos_t new_frames = source_beats_to_absolute_frames ((*i)->note()->time()) + dt;
                Evoral::Beats new_time = absolute_frames_to_source_beats (new_frames);
 
@@ -2588,22 +2598,25 @@ MidiRegionView::note_dropped(NoteBase *, frameoffset_t dt, int8_t dnote)
 }
 
 /** @param x Pixel relative to the region position.
+ *  @param ensure_snap defaults to false. true = snap always, ignoring snap mode and magnetic snap.
+ *  Used for inverting the snap logic with key modifiers and snap delta calculation.
  *  @return Snapped frame relative to the region position.
  */
 framepos_t
-MidiRegionView::snap_pixel_to_sample(double x)
+MidiRegionView::snap_pixel_to_sample(double x, bool ensure_snap)
 {
        PublicEditor& editor (trackview.editor());
-       return snap_frame_to_frame (editor.pixel_to_sample (x));
+       return snap_frame_to_frame (editor.pixel_to_sample (x), ensure_snap);
 }
 
 /** @param x Pixel relative to the region position.
+ *  @param ensure_snap defaults to false. true = ignore magnetic snap and snap mode (used for snap delta calculation).
  *  @return Snapped pixel relative to the region position.
  */
 double
-MidiRegionView::snap_to_pixel(double x)
+MidiRegionView::snap_to_pixel(double x, bool ensure_snap)
 {
-       return (double) trackview.editor().sample_to_pixel(snap_pixel_to_sample(x));
+       return (double) trackview.editor().sample_to_pixel(snap_pixel_to_sample(x, ensure_snap));
 }
 
 double
@@ -2654,6 +2667,12 @@ MidiRegionView::region_frames_to_region_beats(framepos_t frames) const
        return _region_relative_time_converter.from(frames);
 }
 
+double
+MidiRegionView::region_frames_to_region_beats_double (framepos_t frames) const
+{
+       return _region_relative_time_converter_double.from(frames);
+}
+
 void
 MidiRegionView::begin_resizing (bool /*at_front*/)
 {
@@ -2668,12 +2687,12 @@ MidiRegionView::begin_resizing (bool /*at_front*/)
                        resize_data->note = note;
 
                        // create a new SimpleRect from the note which will be the resize preview
-                       ArdourCanvas::Rectangle *resize_rect = new ArdourCanvas::Rectangle (_note_group, 
+                       ArdourCanvas::Rectangle *resize_rect = new ArdourCanvas::Rectangle (_note_group,
                                                                                            ArdourCanvas::Rect (note->x0(), note->y0(), note->x0(), note->y1()));
 
                        // calculate the colors: get the color settings
                        uint32_t fill_color = UINT_RGBA_CHANGE_A(
-                               ARDOUR_UI::config()->color ("midi note selected"),
+                               UIConfiguration::instance().color ("midi note selected"),
                                128);
 
                        // make the resize preview notes more transparent and bright
@@ -2686,7 +2705,7 @@ MidiRegionView::begin_resizing (bool /*at_front*/)
                                0.85));
 
                        resize_rect->set_outline_color (NoteBase::calculate_outline (
-                                                               ARDOUR_UI::config()->color ("midi note selected")));
+                                                               UIConfiguration::instance().color ("midi note selected")));
 
                        resize_data->resize_rect = resize_rect;
                        _resize_data.push_back(resize_data);
@@ -2702,11 +2721,14 @@ MidiRegionView::begin_resizing (bool /*at_front*/)
  * a difference when multiple notes are being resized; in relative mode, each note's length is changed by the
  * amount of the drag.  In non-relative mode, all selected notes are set to have the same start or end point
  * as the \a primary note.
+ * @param snap_delta snap offset of the primary note in pixels. used in SnapRelative SnapDelta mode.
+ * @param with_snap true if snap is to be used to determine the position, false if no snap is to be used.
  */
 void
-MidiRegionView::update_resizing (NoteBase* primary, bool at_front, double delta_x, bool relative)
+MidiRegionView::update_resizing (NoteBase* primary, bool at_front, double delta_x, bool relative, double snap_delta, bool with_snap)
 {
        bool cursor_set = false;
+       bool const ensure_snap = trackview.editor().snap_mode () != SnapMagnetic;
 
        for (std::vector<NoteResizeData *>::iterator i = _resize_data.begin(); i != _resize_data.end(); ++i) {
                ArdourCanvas::Rectangle* resize_rect = (*i)->resize_rect;
@@ -2715,15 +2737,15 @@ MidiRegionView::update_resizing (NoteBase* primary, bool at_front, double delta_
 
                if (at_front) {
                        if (relative) {
-                               current_x = canvas_note->x0() + delta_x;
+                               current_x = canvas_note->x0() + delta_x + snap_delta;
                        } else {
-                               current_x = primary->x0() + delta_x;
+                               current_x = primary->x0() + delta_x + snap_delta;
                        }
                } else {
                        if (relative) {
-                               current_x = canvas_note->x1() + delta_x;
+                               current_x = canvas_note->x1() + delta_x + snap_delta;
                        } else {
-                               current_x = primary->x1() + delta_x;
+                               current_x = primary->x1() + delta_x + snap_delta;
                        }
                }
 
@@ -2737,26 +2759,47 @@ MidiRegionView::update_resizing (NoteBase* primary, bool at_front, double delta_
                }
 
                if (at_front) {
-                       resize_rect->set_x0 (snap_to_pixel(current_x));
+                       if (with_snap) {
+                               resize_rect->set_x0 (snap_to_pixel (current_x, ensure_snap) - snap_delta);
+                       } else {
+                               resize_rect->set_x0 (current_x - snap_delta);
+                       }
                        resize_rect->set_x1 (canvas_note->x1());
                } else {
-                       resize_rect->set_x1 (snap_to_pixel(current_x));
+                       if (with_snap) {
+                               resize_rect->set_x1 (snap_to_pixel (current_x, ensure_snap) - snap_delta);
+                       } else {
+                               resize_rect->set_x1 (current_x - snap_delta);
+                       }
                        resize_rect->set_x0 (canvas_note->x0());
                }
 
                if (!cursor_set) {
-                       const double  snapped_x = snap_pixel_to_sample (current_x);
+                       /* Convert snap delta from pixels to beats. */
+                       framepos_t snap_delta_samps = trackview.editor().pixel_to_sample (snap_delta);
+                       double snap_delta_beats = 0.0;
+                       int sign = 1;
+
+                       /* negative beat offsets aren't allowed */
+                       if (snap_delta_samps > 0) {
+                               snap_delta_beats = region_frames_to_region_beats_double (snap_delta_samps);
+                       } else if (snap_delta_samps < 0) {
+                               snap_delta_beats = region_frames_to_region_beats_double ( - snap_delta_samps);
+                               sign = -1;
+                       }
+
+                       const double  snapped_x = (with_snap ? snap_pixel_to_sample (current_x, ensure_snap) : trackview.editor ().pixel_to_sample (current_x));
                        Evoral::Beats beats     = region_frames_to_region_beats (snapped_x);
                        Evoral::Beats len       = Evoral::Beats();
 
                        if (at_front) {
                                if (beats < canvas_note->note()->end_time()) {
-                                       len = canvas_note->note()->time() - beats;
+                                       len = canvas_note->note()->time() - beats + (sign * snap_delta_beats);
                                        len += canvas_note->note()->length();
                                }
                        } else {
                                if (beats >= canvas_note->note()->time()) {
-                                       len = beats - canvas_note->note()->time();
+                                       len = beats - canvas_note->note()->time() - (sign * snap_delta_beats);
                                }
                        }
 
@@ -2777,9 +2820,12 @@ MidiRegionView::update_resizing (NoteBase* primary, bool at_front, double delta_
  *  Parameters the same as for \a update_resizing().
  */
 void
-MidiRegionView::commit_resizing (NoteBase* primary, bool at_front, double delta_x, bool relative)
+MidiRegionView::commit_resizing (NoteBase* primary, bool at_front, double delta_x, bool relative, double snap_delta, bool with_snap)
 {
-       start_note_diff_command (_("resize notes"));
+       _note_diff_command = _model->new_note_diff_command (_("resize notes"));
+
+       /* XX why doesn't snap_pixel_to_sample() handle this properly? */
+       bool const ensure_snap = trackview.editor().snap_mode () != SnapMagnetic;
 
        for (std::vector<NoteResizeData *>::iterator i = _resize_data.begin(); i != _resize_data.end(); ++i) {
                Note*  canvas_note = (*i)->note;
@@ -2788,20 +2834,20 @@ MidiRegionView::commit_resizing (NoteBase* primary, bool at_front, double delta_
                /* Get the new x position for this resize, which is in pixels relative
                 * to the region position.
                 */
-               
+
                double current_x;
 
                if (at_front) {
                        if (relative) {
-                               current_x = canvas_note->x0() + delta_x;
+                               current_x = canvas_note->x0() + delta_x + snap_delta;
                        } else {
-                               current_x = primary->x0() + delta_x;
+                               current_x = primary->x0() + delta_x + snap_delta;
                        }
                } else {
                        if (relative) {
-                               current_x = canvas_note->x1() + delta_x;
+                               current_x = canvas_note->x1() + delta_x + snap_delta;
                        } else {
-                               current_x = primary->x1() + delta_x;
+                               current_x = primary->x1() + delta_x + snap_delta;
                        }
                }
 
@@ -2812,16 +2858,32 @@ MidiRegionView::commit_resizing (NoteBase* primary, bool at_front, double delta_
                        current_x = trackview.editor().sample_to_pixel(_region->length());
                }
 
-               /* Convert that to a frame within the source */
-               current_x = snap_pixel_to_sample (current_x) + _region->start ();
+               /* Convert snap delta from pixels to beats with sign. */
+               framepos_t snap_delta_samps = trackview.editor().pixel_to_sample (snap_delta);
+               double snap_delta_beats = 0.0;
+               int sign = 1;
+
+               if (snap_delta_samps > 0) {
+                       snap_delta_beats = region_frames_to_region_beats_double (snap_delta_samps);
+               } else if (snap_delta_samps < 0) {
+                       snap_delta_beats = region_frames_to_region_beats_double ( - snap_delta_samps);
+                       sign = -1;
+               }
+
+               /* Convert the new x position to a frame within the source */
+               framepos_t current_fr;
+               if (with_snap) {
+                       current_fr = snap_pixel_to_sample (current_x, ensure_snap) + _region->start ();
+               } else {
+                       current_fr = trackview.editor().pixel_to_sample (current_x) + _region->start ();
+               }
 
                /* and then to beats */
-               const Evoral::Beats x_beats = region_frames_to_region_beats (current_x);
+               const Evoral::Beats x_beats = region_frames_to_region_beats (current_fr);
 
                if (at_front && x_beats < canvas_note->note()->end_time()) {
-                       note_diff_add_change (canvas_note, MidiModel::NoteDiffCommand::StartTime, x_beats);
-
-                       Evoral::Beats len = canvas_note->note()->time() - x_beats;
+                       note_diff_add_change (canvas_note, MidiModel::NoteDiffCommand::StartTime, x_beats - (sign * snap_delta_beats));
+                       Evoral::Beats len = canvas_note->note()->time() - x_beats + (sign * snap_delta_beats);
                        len += canvas_note->note()->length();
 
                        if (!!len) {
@@ -2830,8 +2892,8 @@ MidiRegionView::commit_resizing (NoteBase* primary, bool at_front, double delta_
                }
 
                if (!at_front) {
-                       const Evoral::Beats len = std::max(Evoral::Beats(1 / 512.0),
-                                                          x_beats - canvas_note->note()->time());
+                       Evoral::Beats len = std::max(Evoral::Beats(1 / 512.0),
+                                                    x_beats - canvas_note->note()->time() - (sign * snap_delta_beats));
                        note_diff_add_change (canvas_note, MidiModel::NoteDiffCommand::Length, len);
                }
 
@@ -2840,7 +2902,7 @@ MidiRegionView::commit_resizing (NoteBase* primary, bool at_front, double delta_
        }
 
        _resize_data.clear();
-       apply_diff();
+       apply_diff(true);
 }
 
 void
@@ -3233,13 +3295,22 @@ MidiRegionView::change_channel(uint8_t channel)
 void
 MidiRegionView::note_entered(NoteBase* ev)
 {
+       _note_entered = true;
+
        Editor* editor = dynamic_cast<Editor*>(&trackview.editor());
 
        if (_mouse_state == SelectTouchDragging) {
+
                note_selected (ev, true);
+
        } else if (editor->current_mouse_mode() == MouseContent) {
+
+               remove_ghost_note ();
                show_verbose_cursor (ev->note ());
+
        } else if (editor->current_mouse_mode() == MouseDraw) {
+
+               remove_ghost_note ();
                show_verbose_cursor (ev->note ());
        }
 }
@@ -3247,13 +3318,13 @@ MidiRegionView::note_entered(NoteBase* ev)
 void
 MidiRegionView::note_left (NoteBase*)
 {
-       Editor* editor = dynamic_cast<Editor*>(&trackview.editor());
+       _note_entered = false;
 
        for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
                (*i)->hide_velocity ();
        }
 
-       editor->verbose_cursor()->hide ();
+       hide_verbose_cursor ();
 }
 
 void
@@ -3261,8 +3332,8 @@ MidiRegionView::patch_entered (PatchChange* p)
 {
        ostringstream s;
        /* XXX should get patch name if we can */
-       s << _("Bank ") << (p->patch()->bank() + MIDI_BP_ZERO) << '\n' 
-         << _("Program ") << ((int) p->patch()->program()) + MIDI_BP_ZERO << '\n' 
+       s << _("Bank ") << (p->patch()->bank() + MIDI_BP_ZERO) << '\n'
+         << _("Program ") << ((int) p->patch()->program()) + MIDI_BP_ZERO << '\n'
          << _("Channel ") << ((int) p->patch()->channel() + 1);
        show_verbose_cursor (s.str(), 10, 20);
        p->item().grab_focus();
@@ -3271,7 +3342,7 @@ MidiRegionView::patch_entered (PatchChange* p)
 void
 MidiRegionView::patch_left (PatchChange *)
 {
-       trackview.editor().verbose_cursor()->hide ();
+       hide_verbose_cursor ();
        /* focus will transfer back via the enter-notify event sent to this
         * midi region view.
         */
@@ -3291,7 +3362,7 @@ MidiRegionView::sysex_entered (SysEx* p)
 void
 MidiRegionView::sysex_left (SysEx *)
 {
-       trackview.editor().verbose_cursor()->hide ();
+       hide_verbose_cursor ();
        /* focus will transfer back via the enter-notify event sent to this
         * midi region view.
         */
@@ -3323,12 +3394,12 @@ MidiRegionView::get_fill_color() const
                                      trackview.editor().internal_editing() ? "editable region" :
                                      "midi frame base");
        if (_selected) {
-               return ARDOUR_UI::config()->color_mod ("selected region base", mod_name);
-       } else if ((!ARDOUR_UI::config()->get_show_name_highlight() || high_enough_for_name) &&
-                  !ARDOUR_UI::config()->get_color_regions_using_track_color()) {
-               return ARDOUR_UI::config()->color_mod ("midi frame base", mod_name);
+               return UIConfiguration::instance().color_mod ("selected region base", mod_name);
+       } else if ((!UIConfiguration::instance().get_show_name_highlight() || high_enough_for_name) &&
+                  !UIConfiguration::instance().get_color_regions_using_track_color()) {
+               return UIConfiguration::instance().color_mod ("midi frame base", mod_name);
        }
-       return ARDOUR_UI::config()->color_mod (fill_color, mod_name);
+       return UIConfiguration::instance().color_mod (fill_color, mod_name);
 }
 
 void
@@ -3418,10 +3489,12 @@ MidiRegionView::selection_as_cut_buffer () const
 bool
 MidiRegionView::paste (framepos_t pos, const ::Selection& selection, PasteContext& ctx)
 {
+       bool commit = false;
        // Paste notes, if available
        MidiNoteSelection::const_iterator m = selection.midi_notes.get_nth(ctx.counts.n_notes());
        if (m != selection.midi_notes.end()) {
                ctx.counts.increase_n_notes();
+               if (!(*m)->empty()) { commit = true; }
                paste_internal(pos, ctx.count, ctx.times, **m);
        }
 
@@ -3429,9 +3502,14 @@ MidiRegionView::paste (framepos_t pos, const ::Selection& selection, PasteContex
        typedef RouteTimeAxisView::AutomationTracks ATracks;
        const ATracks& atracks = midi_view()->automation_tracks();
        for (ATracks::const_iterator a = atracks.begin(); a != atracks.end(); ++a) {
-               a->second->paste(pos, selection, ctx);
+               if (a->second->paste(pos, selection, ctx)) {
+                       commit = true;
+               }
        }
 
+       if (commit) {
+               trackview.editor().commit_reversible_command ();
+       }
        return true;
 }
 
@@ -3460,7 +3538,7 @@ MidiRegionView::paste_internal (framepos_t pos, unsigned paste_count, float time
                                                       duration, pos, _region->position(),
                                                       pos_beats));
 
-       clear_selection ();
+       clear_editor_note_selection ();
 
        for (int n = 0; n < (int) times; ++n) {
 
@@ -3468,6 +3546,7 @@ MidiRegionView::paste_internal (framepos_t pos, unsigned paste_count, float time
 
                        boost::shared_ptr<NoteType> copied_note (new NoteType (*((*i).get())));
                        copied_note->set_time (pos_beats + copied_note->time() - first_time);
+                       copied_note->set_id (Evoral::next_event_id());
 
                        /* make all newly added notes selected */
 
@@ -3620,7 +3699,7 @@ MidiRegionView::update_ghost_note (double x, double y)
        _note_group->canvas_to_item (x, y);
 
        PublicEditor& editor = trackview.editor ();
-       
+
        framepos_t const unsnapped_frame = editor.pixel_to_sample (x);
        framecnt_t grid_frames;
        framepos_t const f = snap_frame_to_grid_underneath (unsnapped_frame, grid_frames);
@@ -3669,6 +3748,16 @@ MidiRegionView::remove_ghost_note ()
        _ghost_note = 0;
 }
 
+void
+MidiRegionView::hide_verbose_cursor ()
+{
+       trackview.editor().verbose_cursor()->hide ();
+       MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
+       if (mtv) {
+               mtv->set_note_highlight (NO_MIDI_NOTE);
+       }
+}
+
 void
 MidiRegionView::snap_changed ()
 {
@@ -3908,14 +3997,13 @@ MidiRegionView::delete_sysex (SysEx* /*sysex*/)
        // display_sysexes();
 }
 
-void
-MidiRegionView::show_verbose_cursor (boost::shared_ptr<NoteType> n) const
+std::string
+MidiRegionView::get_note_name (boost::shared_ptr<NoteType> n, uint8_t note_value) const
 {
        using namespace MIDI::Name;
-
        std::string name;
 
-       MidiTimeAxisView* const mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
+       MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
        if (mtv) {
                boost::shared_ptr<MasterDeviceNames> device_names(mtv->get_device_names());
                if (device_names) {
@@ -3925,18 +4013,36 @@ MidiRegionView::show_verbose_cursor (boost::shared_ptr<NoteType> n) const
                                                       n->channel(),
                                                       patch_key.bank(),
                                                       patch_key.program(),
-                                                      n->note());
+                                                      note_value);
                }
        }
 
        char buf[128];
        snprintf (buf, sizeof (buf), "%d %s\nCh %d Vel %d",
-                 (int) n->note (),
-                 name.empty() ? Evoral::midi_note_name (n->note()).c_str() : name.c_str(),
+                 (int) note_value,
+                 name.empty() ? Evoral::midi_note_name (note_value).c_str() : name.c_str(),
                  (int) n->channel() + 1,
                  (int) n->velocity());
 
-       show_verbose_cursor(buf, 10, 20);
+       return buf;
+}
+
+void
+MidiRegionView::show_verbose_cursor_for_new_note_value(boost::shared_ptr<NoteType> current_note,
+                                                       uint8_t new_value) const
+{
+       MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
+       if (mtv) {
+               mtv->set_note_highlight (new_value);
+       }
+
+       show_verbose_cursor(get_note_name(current_note, new_value), 10, 20);
+}
+
+void
+MidiRegionView::show_verbose_cursor (boost::shared_ptr<NoteType> n) const
+{
+       show_verbose_cursor_for_new_note_value(n, n->note());
 }
 
 void
@@ -3982,7 +4088,7 @@ framepos_t
 MidiRegionView::snap_frame_to_grid_underneath (framepos_t p, framecnt_t& grid_frames) const
 {
        PublicEditor& editor = trackview.editor ();
-       
+
        const Evoral::Beats grid_beats = get_grid_beats(p);
 
        grid_frames = region_beats_to_region_frames (grid_beats);
@@ -3997,26 +4103,6 @@ MidiRegionView::snap_frame_to_grid_underneath (framepos_t p, framecnt_t& grid_fr
        return snap_frame_to_frame (p);
 }
 
-/** Called when the selection has been cleared in any MidiRegionView.
- *  @param rv MidiRegionView that the selection was cleared in.
- */
-void
-MidiRegionView::selection_cleared (MidiRegionView* rv)
-{
-       if (rv == this) {
-               return;
-       }
-
-       /* Clear our selection in sympathy; but don't signal the fact */
-       clear_selection (false);
-}
-
-void
-MidiRegionView::note_button_release ()
-{
-       _note_player.reset();
-}
-
 ChannelMode
 MidiRegionView::get_channel_mode () const
 {