merge 3.0-panexp (pan experiments) branch, revisions 8534-8585 into 3.0, thus ending...
[ardour.git] / gtk2_ardour / midi_region_view.cc
index c78386ab02009c9fd5c02bec9e882c87ca954c44..60e07c17e08fc2784fd68ae741a858b635c53ba7 100644 (file)
@@ -40,6 +40,7 @@
 #include "ardour/session.h"
 
 #include "evoral/Parameter.hpp"
+#include "evoral/MIDIParameters.hpp"
 #include "evoral/Control.hpp"
 #include "evoral/midi_util.h"
 
@@ -47,7 +48,8 @@
 #include "automation_time_axis.h"
 #include "canvas-hit.h"
 #include "canvas-note.h"
-#include "canvas-program-change.h"
+#include "canvas_patch_change.h"
+#include "editor.h"
 #include "ghostregion.h"
 #include "gui_thread.h"
 #include "keyboard.h"
 #include "midi_region_view.h"
 #include "midi_streamview.h"
 #include "midi_time_axis.h"
-#include "midi_time_axis.h"
 #include "midi_util.h"
+#include "note_player.h"
 #include "public_editor.h"
+#include "rgb_macros.h"
 #include "selection.h"
 #include "simpleline.h"
 #include "streamview.h"
 #include "utils.h"
+#include "mouse_cursors.h"
+#include "patch_change_dialog.h"
 
 #include "i18n.h"
 
@@ -82,17 +87,29 @@ MidiRegionView::MidiRegionView (ArdourCanvas::Group *parent, RouteTimeAxisView &
        , _model_name(string())
        , _custom_device_mode(string())
        , _active_notes(0)
-       , _note_group(new ArdourCanvas::Group(*parent))
-       , _delta_command(0)
-       , _diff_command(0)
+       , _note_group(new ArdourCanvas::Group(*group))
+       , _note_diff_command (0)
+       , _ghost_note(0)
+        , _drag_rect (0)
+        , _step_edit_cursor (0)
+        , _step_edit_cursor_width (1.0)
+        , _step_edit_cursor_position (0.0)
+        , _channel_selection_scoped_note (0)
+       , _temporary_note_group (0)
        , _mouse_state(None)
        , _pressed_button(0)
        , _sort_needed (true)
        , _optimization_iterator (_events.end())
        , _list_editor (0)
        , no_sound_notes (false)
+       , _last_event_x (0)
+       , _last_event_y (0)
+        , pre_enter_cursor (0)
 {
        _note_group->raise_to_top();
+        PublicEditor::DropDownKeys.connect (sigc::mem_fun (*this, &MidiRegionView::drop_down_keys));
+
+       connect_to_diskstream ();
 }
 
 MidiRegionView::MidiRegionView (ArdourCanvas::Group *parent, RouteTimeAxisView &tv,
@@ -105,19 +122,28 @@ MidiRegionView::MidiRegionView (ArdourCanvas::Group *parent, RouteTimeAxisView &
        , _custom_device_mode(string())
        , _active_notes(0)
        , _note_group(new ArdourCanvas::Group(*parent))
-       , _delta_command(0)
-       , _diff_command(0)
+       , _note_diff_command (0)
+       , _ghost_note(0)
+        , _drag_rect (0)
+        , _step_edit_cursor (0)
+        , _step_edit_cursor_width (1.0)
+        , _step_edit_cursor_position (0.0)
+       , _channel_selection_scoped_note (0)
+       , _temporary_note_group (0)
        , _mouse_state(None)
        , _pressed_button(0)
        , _sort_needed (true)
        , _optimization_iterator (_events.end())
        , _list_editor (0)
        , no_sound_notes (false)
-
+       , _last_event_x (0)
+       , _last_event_y (0)
 {
        _note_group->raise_to_top();
-}
+        PublicEditor::DropDownKeys.connect (sigc::mem_fun (*this, &MidiRegionView::drop_down_keys));
 
+       connect_to_diskstream ();
+}
 
 MidiRegionView::MidiRegionView (const MidiRegionView& other)
        : sigc::trackable(other)
@@ -128,14 +154,22 @@ MidiRegionView::MidiRegionView (const MidiRegionView& other)
        , _custom_device_mode(string())
        , _active_notes(0)
        , _note_group(new ArdourCanvas::Group(*get_canvas_group()))
-       , _delta_command(0)
-       , _diff_command(0)
+       , _note_diff_command (0)
+       , _ghost_note(0)
+        , _drag_rect (0)
+        , _step_edit_cursor (0)
+        , _step_edit_cursor_width (1.0)
+        , _step_edit_cursor_position (0.0)
+        , _channel_selection_scoped_note (0)
+       , _temporary_note_group (0)
        , _mouse_state(None)
        , _pressed_button(0)
        , _sort_needed (true)
        , _optimization_iterator (_events.end())
        , _list_editor (0)
        , no_sound_notes (false)
+       , _last_event_x (0)
+       , _last_event_y (0)
 {
        Gdk::Color c;
        int r,g,b,a;
@@ -154,14 +188,22 @@ MidiRegionView::MidiRegionView (const MidiRegionView& other, boost::shared_ptr<M
        , _custom_device_mode(string())
        , _active_notes(0)
        , _note_group(new ArdourCanvas::Group(*get_canvas_group()))
-       , _delta_command(0)
-       , _diff_command(0)
+       , _note_diff_command (0)
+       , _ghost_note(0)
+        , _drag_rect (0)
+        , _step_edit_cursor (0)
+        , _step_edit_cursor_width (1.0)
+        , _step_edit_cursor_position (0.0)
+        , _channel_selection_scoped_note (0)
+       , _temporary_note_group (0)
        , _mouse_state(None)
        , _pressed_button(0)
        , _sort_needed (true)
        , _optimization_iterator (_events.end())
        , _list_editor (0)
        , no_sound_notes (false)
+       , _last_event_x (0)
+       , _last_event_y (0)
 {
        Gdk::Color c;
        int r,g,b,a;
@@ -175,6 +217,8 @@ MidiRegionView::MidiRegionView (const MidiRegionView& other, boost::shared_ptr<M
 void
 MidiRegionView::init (Gdk::Color const & basic_color, bool wfd)
 {
+        PublicEditor::DropDownKeys.connect (sigc::mem_fun (*this, &MidiRegionView::drop_down_keys));
+
         CanvasNoteEvent::CanvasNoteEventDeleted.connect (note_delete_connection, MISSING_INVALIDATOR, 
                                                          ui_bind (&MidiRegionView::maybe_remove_deleted_note_from_selection, this, _1),
                                                          gui_context());
@@ -216,328 +260,523 @@ MidiRegionView::init (Gdk::Color const & basic_color, bool wfd)
 
        midi_view()->signal_midi_patch_settings_changed().connect(
                        sigc::mem_fun(this, &MidiRegionView::midi_patch_settings_changed));
+
+       trackview.editor().SnapChanged.connect (snap_changed_connection, invalidator (*this), ui_bind (&MidiRegionView::snap_changed, this), gui_context ());
+
+       connect_to_diskstream ();
+}
+
+void
+MidiRegionView::connect_to_diskstream ()
+{
+       midi_view()->midi_track()->DataRecorded.connect (*this, invalidator (*this), ui_bind (&MidiRegionView::data_recorded, this, _1, _2), gui_context ());
 }
 
 bool
 MidiRegionView::canvas_event(GdkEvent* ev)
 {
-       PublicEditor& editor (trackview.editor());
-
-       if (!editor.internal_editing()) {
+       switch (ev->type) {
+       case GDK_ENTER_NOTIFY:
+       case GDK_LEAVE_NOTIFY:
+               _last_event_x = ev->crossing.x;
+               _last_event_y = ev->crossing.y;
+               break;
+       case GDK_MOTION_NOTIFY:
+               _last_event_x = ev->motion.x;
+               _last_event_y = ev->motion.y;
+               break;
+       default:
+               break;
+       }
+       
+       if (!trackview.editor().internal_editing()) {
                return false;
        }
 
-       static double drag_start_x, drag_start_y;
-       static double last_x, last_y;
-       double event_x, event_y;
-       nframes64_t event_frame = 0;
-       bool fine;
-
-       static ArdourCanvas::SimpleRect* drag_rect = 0;
-
-       /* XXX: note that as of August 2009, the GnomeCanvas does not propagate scroll events
+       /* XXX: note that until version 2.30, the GnomeCanvas did not propagate scroll events
           to its items, which means that ev->type == GDK_SCROLL will never be seen
        */
 
        switch (ev->type) {
        case GDK_SCROLL:
-               fine = Keyboard::modifier_state_equals (ev->scroll.state, Keyboard::Level4Modifier);
-
-               if (ev->scroll.direction == GDK_SCROLL_UP) {
-                       change_velocities (true, fine, false);
-                       return true;
-               } else if (ev->scroll.direction == GDK_SCROLL_DOWN) {
-                       change_velocities (false, fine, false);
-                       return true;
-               } else {
-                       return false;
-               }
-               break;
+                return scroll (&ev->scroll);
 
        case GDK_KEY_PRESS:
+                return key_press (&ev->key);
 
-               /* since GTK bindings are generally activated on press, and since
-                  detectable auto-repeat is the name of the game and only sends
-                  repeated presses, carry out key actions at key press, not release.
-               */
-
-               if (ev->key.keyval == GDK_Alt_L || ev->key.keyval == GDK_Alt_R){
-                       _mouse_state = SelectTouchDragging;
-                       return true;
+       case GDK_KEY_RELEASE:
+                return key_release (&ev->key);
 
-               } else if (ev->key.keyval == GDK_Escape) {
-                       clear_selection();
-                       _mouse_state = None;
+       case GDK_BUTTON_PRESS:
+                return button_press (&ev->button);
 
-               } else if (ev->key.keyval == GDK_comma || ev->key.keyval == GDK_period) {
+       case GDK_2BUTTON_PRESS:
+               return true;
 
-                       bool start = (ev->key.keyval == GDK_comma);
-                       bool end = (ev->key.keyval == GDK_period);
-                       bool shorter = Keyboard::modifier_state_contains (ev->key.state, Keyboard::PrimaryModifier);
-                       fine = Keyboard::modifier_state_contains (ev->key.state, Keyboard::SecondaryModifier);
+       case GDK_BUTTON_RELEASE:
+                return button_release (&ev->button);
+               
+       case GDK_ENTER_NOTIFY:
+                return enter_notify (&ev->crossing);
 
-                       change_note_lengths (fine, shorter, start, end);
+       case GDK_LEAVE_NOTIFY:
+                return leave_notify (&ev->crossing);
 
-                       return true;
+       case GDK_MOTION_NOTIFY:
+                return motion (&ev->motion);
 
-               } else if (ev->key.keyval == GDK_Delete) {
+       default: 
+                break;
+       }
 
-                       delete_selection();
-                       return true;
+       return false;
+}
 
-               } else if (ev->key.keyval == GDK_Tab) {
+void
+MidiRegionView::remove_ghost_note ()
+{
+        delete _ghost_note;
+        _ghost_note = 0;
+}
 
-                       if (Keyboard::modifier_state_equals (ev->key.state, Keyboard::PrimaryModifier)) {
-                               goto_previous_note ();
-                       } else {
-                               goto_next_note ();
-                       }
-                       return true;
+bool
+MidiRegionView::enter_notify (GdkEventCrossing* ev)
+{
+       trackview.editor().MouseModeChanged.connect (
+               _mouse_mode_connection, invalidator (*this), ui_bind (&MidiRegionView::mouse_mode_changed, this), gui_context ()
+               );
 
-               } else if (ev->key.keyval == GDK_Up) {
+        Keyboard::magic_widget_grab_focus();
+        group->grab_focus();
 
-                       bool allow_smush = Keyboard::modifier_state_contains (ev->key.state, Keyboard::SecondaryModifier);
-                       bool fine = Keyboard::modifier_state_contains (ev->key.state, Keyboard::TertiaryModifier);
+       if (trackview.editor().current_mouse_mode() == MouseRange) {
+               create_ghost_note (ev->x, ev->y);
+       }
 
-                       if (Keyboard::modifier_state_contains (ev->key.state, Keyboard::PrimaryModifier)) {
-                               change_velocities (true, fine, allow_smush);
-                       } else {
-                               transpose (true, fine, allow_smush);
-                       }
-                       return true;
+        return false;
+}
 
-               } else if (ev->key.keyval == GDK_Down) {
+bool
+MidiRegionView::leave_notify (GdkEventCrossing*)
+{
+       _mouse_mode_connection.disconnect ();
+       
+        trackview.editor().hide_verbose_canvas_cursor ();
+       remove_ghost_note ();
+        return false;
+}
 
-                       bool allow_smush = Keyboard::modifier_state_contains (ev->key.state, Keyboard::SecondaryModifier);
-                       fine = Keyboard::modifier_state_contains (ev->key.state, Keyboard::TertiaryModifier);
+void
+MidiRegionView::mouse_mode_changed ()
+{
+       if (trackview.editor().current_mouse_mode() == MouseRange && trackview.editor().internal_editing()) {
+               create_ghost_note (_last_event_x, _last_event_y);
+       } else {
+               remove_ghost_note ();
+               trackview.editor().hide_verbose_canvas_cursor ();
+       }
+}
 
-                       if (Keyboard::modifier_state_contains (ev->key.state, Keyboard::PrimaryModifier)) {
-                               change_velocities (false, fine, allow_smush);
-                       } else {
-                               transpose (false, fine, allow_smush);
-                       }
-                       return true;
+bool
+MidiRegionView::button_press (GdkEventButton* ev)
+{
+        _last_x = ev->x;
+        _last_y = ev->y;
+       
+        group->w2i (_last_x, _last_y);
+        
+        if (_mouse_state != SelectTouchDragging) {
+         
+                _pressed_button = ev->button;
+                _mouse_state = Pressed;
 
-               } else if (ev->key.keyval == GDK_Left) {
+                return true;
+        }
+        
+        _pressed_button = ev->button;
 
-                       nudge_notes (false);
-                       return true;
+        return true;
+}
 
-               } else if (ev->key.keyval == GDK_Right) {
+bool
+MidiRegionView::button_release (GdkEventButton* ev)
+{
+       double event_x, event_y;
+       framepos_t event_frame = 0;
 
-                       nudge_notes (true);
-                       return true;
+        event_x = ev->x;
+        event_y = ev->y;
+       
+        group->w2i(event_x, event_y);
+        group->ungrab(ev->time);
+        
+       event_frame = trackview.editor().pixel_to_frame(event_x);
+
+        switch (_mouse_state) {
+        case Pressed: // Clicked 
+
+                switch (trackview.editor().current_mouse_mode()) {
+                case MouseObject:
+                case MouseTimeFX:
+               {
+                        clear_selection();
+                       
+                       if (Keyboard::is_insert_note_event(ev)){
+                               
+                               double event_x, event_y;
+                               
+                               event_x = ev->x;
+                               event_y = ev->y;
+                               group->w2i(event_x, event_y);
 
-               } else if (ev->key.keyval == GDK_Control_L) {
-                       return true;
+                               bool success;
+                               Evoral::MusicalTime beats = trackview.editor().get_grid_type_as_beats (success, trackview.editor().pixel_to_frame (event_x));
+                               
+                               if (!success) {
+                                       beats = 1;
+                               }
+                               
+                               create_note_at (event_x, event_y, beats, true);
+                       }
 
-               } else if (ev->key.keyval == GDK_r) {
-                       /* if we're not step editing, this really doesn't matter */
-                       midi_view()->step_edit_rest ();
-                       return true;
+                        break;
                }
+                case MouseRange:
+                {
+                        bool success;
+                        Evoral::MusicalTime beats = trackview.editor().get_grid_type_as_beats (success, trackview.editor().pixel_to_frame (event_x));
+                        
+                       if (!success) {
+                                beats = 1;
+                        }
+                        
+                        create_note_at (event_x, event_y, beats, true);
+                        
+                       break;
+                }
+                default:
+                        break;
+                }
+                
+                _mouse_state = None;
+                break;
+               
+        case SelectRectDragging: // Select drag done
+         
+                _mouse_state = None;
+                delete _drag_rect;
+                _drag_rect = 0;
+                break;
 
-               return false;
+        case AddDragging: // Add drag done
 
-       case GDK_KEY_RELEASE:
-               if (ev->key.keyval == GDK_Alt_L || ev->key.keyval == GDK_Alt_R) {
-                       _mouse_state = None;
-                       return true;
-               }
-               return false;
+                _mouse_state = None;
+               
+               if (Keyboard::is_insert_note_event(ev) || trackview.editor().current_mouse_mode() == MouseRange){
+               
+                       if (_drag_rect->property_x2() > _drag_rect->property_x1() + 2) {
 
-       case GDK_BUTTON_PRESS:
-               last_x = ev->button.x;
-               last_y = ev->button.y;
-               group->w2i (last_x, last_y);
-
-               if (_mouse_state != SelectTouchDragging && ev->button.button == 1) {
-                       _pressed_button = ev->button.button;
-                       _mouse_state = Pressed;
-                       return true;
-               }
-               _pressed_button = ev->button.button;
-               return true;
+                               const double x  = _drag_rect->property_x1();
+                               const double length = trackview.editor().pixel_to_frame (_drag_rect->property_x2() - _drag_rect->property_x1());
 
-       case GDK_2BUTTON_PRESS:
-               return true;
+                               create_note_at (x, _drag_rect->property_y1(), frames_to_beats(length), true);
+                       }
+                }
 
-       case GDK_ENTER_NOTIFY:
-               /* FIXME: do this on switch to note tool, too, if the pointer is already in */
-               Keyboard::magic_widget_grab_focus();
-               group->grab_focus();
-               break;
+                delete _drag_rect;
+                _drag_rect = 0;
 
-       case GDK_MOTION_NOTIFY:
-               event_x = ev->motion.x;
-               event_y = ev->motion.y;
-               group->w2i(event_x, event_y);
-
-               // convert event_x to global frame
-               event_frame = trackview.editor().pixel_to_frame(event_x) + _region->position();
-               trackview.editor().snap_to(event_frame);
-               // convert event_frame back to local coordinates relative to position
-               event_frame -= _region->position();
-
-               switch (_mouse_state) {
-               case Pressed: // Maybe start a drag, if we've moved a bit
-
-                       if (fabs (event_x - last_x) < 1 && fabs (event_y - last_y) < 1) {
-                               /* no appreciable movement since the button was pressed */
-                               return false;
-                       }
+                create_ghost_note (ev->x, ev->y);
+               
+        default:
+                break;
+        }
 
-                       // Select drag start
-                       if (_pressed_button == 1 && editor.current_mouse_mode() == MouseObject) {
-                               group->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
-                                               Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
-                               last_x = event_x;
-                               last_y = event_y;
-                               drag_start_x = event_x;
-                               drag_start_y = event_y;
-
-                               drag_rect = new ArdourCanvas::SimpleRect(*group);
-                               drag_rect->property_x1() = event_x;
-                               drag_rect->property_y1() = event_y;
-                               drag_rect->property_x2() = event_x;
-                               drag_rect->property_y2() = event_y;
-                               drag_rect->property_outline_what() = 0xFF;
-                               drag_rect->property_outline_color_rgba()
-                                       = ARDOUR_UI::config()->canvasvar_MidiSelectRectOutline.get();
-                               drag_rect->property_fill_color_rgba()
-                                       = ARDOUR_UI::config()->canvasvar_MidiSelectRectFill.get();
-
-                               _mouse_state = SelectRectDragging;
-                               return true;
+        return false;
+}
 
-                       // Add note drag start
-                       } else if (editor.internal_editing()) {
-                               group->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
-                                               Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
-                               last_x = event_x;
-                               last_y = event_y;
-                               drag_start_x = event_x;
-                               drag_start_y = event_y;
-
-                               drag_rect = new ArdourCanvas::SimpleRect(*group);
-                               drag_rect->property_x1() = trackview.editor().frame_to_pixel(event_frame);
-
-                               drag_rect->property_y1() = midi_stream_view()->note_to_y(
-                                               midi_stream_view()->y_to_note(event_y));
-                               drag_rect->property_x2() = trackview.editor().frame_to_pixel(event_frame);
-                               drag_rect->property_y2() = drag_rect->property_y1()
-                                                        + floor(midi_stream_view()->note_height());
-                               drag_rect->property_outline_what() = 0xFF;
-                               drag_rect->property_outline_color_rgba() = 0xFFFFFF99;
-                               drag_rect->property_fill_color_rgba()    = 0xFFFFFF66;
-
-                               _mouse_state = AddDragging;
-                               return true;
-                       }
+bool
+MidiRegionView::motion (GdkEventMotion* ev)
+{
+       double event_x, event_y;
+       framepos_t event_frame = 0;
 
-                       return false;
-
-               case SelectRectDragging: // Select drag motion
-               case AddDragging: // Add note drag motion
-                       if (ev->motion.is_hint) {
-                               int t_x;
-                               int t_y;
-                               GdkModifierType state;
-                               gdk_window_get_pointer(ev->motion.window, &t_x, &t_y, &state);
-                               event_x = t_x;
-                               event_y = t_y;
-                       }
+        event_x = ev->x;
+        event_y = ev->y;
+        group->w2i(event_x, event_y);
 
-                       if (_mouse_state == AddDragging)
-                               event_x = trackview.editor().frame_to_pixel(event_frame);
+        // convert event_x to global frame
+        event_frame = trackview.editor().pixel_to_frame(event_x) + _region->position();
+        trackview.editor().snap_to(event_frame);
+        
+       // convert event_frame back to local coordinates relative to position
+        event_frame -= _region->position();
 
-                       if (drag_rect) {
-                               if (event_x > drag_start_x)
-                                       drag_rect->property_x2() = event_x;
-                               else
-                                       drag_rect->property_x1() = event_x;
-                       }
+        if (!_ghost_note && trackview.editor().current_mouse_mode() != MouseRange 
+                       && Keyboard::modifier_state_contains (ev->state, Keyboard::insert_note_modifier())  
+                       && _mouse_state != AddDragging){
+         
+               create_ghost_note (ev->x, ev->y);
+       }
+        else if (_ghost_note && trackview.editor().current_mouse_mode() != MouseRange 
+                       && Keyboard::modifier_state_contains (ev->state, Keyboard::insert_note_modifier())){
+         
+               update_ghost_note (ev->x, ev->y);
+       }
+        else if (_ghost_note && trackview.editor().current_mouse_mode() != MouseRange){
+               
+               delete _ghost_note;
+                _ghost_note = 0;
+               
+               trackview.editor().hide_verbose_canvas_cursor ();
+       }
+       else if (_ghost_note && trackview.editor().current_mouse_mode() == MouseRange) {
+                update_ghost_note (ev->x, ev->y);
+        }
+
+        /* any motion immediately hides velocity text that may have been visible */
+               
+       for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
+               (*i)->hide_velocity ();
+       }
 
-                       if (drag_rect && _mouse_state == SelectRectDragging) {
-                               if (event_y > drag_start_y)
-                                       drag_rect->property_y2() = event_y;
-                               else
-                                       drag_rect->property_y1() = event_y;
+        switch (_mouse_state) {
+        case Pressed: // Maybe start a drag, if we've moved a bit
+         
+                if (fabs (event_x - _last_x) < 1 && fabs (event_y - _last_y) < 1) {
+                        /* no appreciable movement since the button was pressed */
+                        return false;
+                }
+
+                // Select drag start
+                if (_pressed_button == 1 && trackview.editor().current_mouse_mode() == MouseObject 
+                       && !Keyboard::modifier_state_contains (ev->state, Keyboard::insert_note_modifier())) {
+                        
+                       group->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
+                                    Gdk::Cursor(Gdk::FLEUR), ev->time);
+                                   
+                        _last_x = event_x;
+                        _last_y = event_y;
+                        _drag_start_x = event_x;
+                        _drag_start_y = event_y;
+
+                        _drag_rect = new ArdourCanvas::SimpleRect(*group);
+                        _drag_rect->property_x1() = event_x;
+                        _drag_rect->property_y1() = event_y;
+                        _drag_rect->property_x2() = event_x;
+                        _drag_rect->property_y2() = event_y;
+                        _drag_rect->property_outline_what() = 0xFF;
+                        _drag_rect->property_outline_color_rgba()
+                                = ARDOUR_UI::config()->canvasvar_MidiSelectRectOutline.get();
+                        _drag_rect->property_fill_color_rgba()
+                                = ARDOUR_UI::config()->canvasvar_MidiSelectRectFill.get();
+
+                        _mouse_state = SelectRectDragging;
+                        return true;
 
-                               update_drag_selection(drag_start_x, event_x, drag_start_y, event_y);
+                       // Add note drag start
+                } else if (trackview.editor().internal_editing()) {
+
+                        delete _ghost_note;
+                        _ghost_note = 0;
+                               
+                        group->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
+                                    Gdk::Cursor(Gdk::FLEUR), ev->time);
+                                   
+                        _last_x = event_x;
+                        _last_y = event_y;
+                        _drag_start_x = event_x;
+                        _drag_start_y = event_y;
+
+                        _drag_rect = new ArdourCanvas::SimpleRect(*group);
+                        _drag_rect->property_x1() = trackview.editor().frame_to_pixel(event_frame);
+
+                        _drag_rect->property_y1() = midi_stream_view()->note_to_y(
+                                midi_stream_view()->y_to_note(event_y));
+                        _drag_rect->property_x2() = trackview.editor().frame_to_pixel(event_frame);
+                        _drag_rect->property_y2() = _drag_rect->property_y1()
+                                + floor(midi_stream_view()->note_height());
+                        _drag_rect->property_outline_what() = 0xFF;
+                        _drag_rect->property_outline_color_rgba() = 0xFFFFFF99;
+                        _drag_rect->property_fill_color_rgba()    = 0xFFFFFF66;
+
+                        _mouse_state = AddDragging;
+
+                       if (_ghost_note){
+               
+                               delete _ghost_note;
+                               _ghost_note = 0;
+               
+                               trackview.editor().hide_verbose_canvas_cursor ();
                        }
 
-                       last_x = event_x;
-                       last_y = event_y;
+                        return true;
+                }
 
-               case SelectTouchDragging:
-                       return false;
+                return false;
 
-               default:
-                       break;
-               }
-               break;
+        case SelectRectDragging: // Select drag motion
+        case AddDragging: // Add note drag motion
 
-       case GDK_BUTTON_RELEASE:
-               event_x = ev->motion.x;
-               event_y = ev->motion.y;
-               group->w2i(event_x, event_y);
-               group->ungrab(ev->button.time);
-               event_frame = trackview.editor().pixel_to_frame(event_x);
-
-               if (ev->button.button == 3) {
-                       return false;
-               } else if (_pressed_button != 1) {
-                       return false;
-               }
+                if (ev->is_hint) {
+                        int t_x;
+                        int t_y;
+                        GdkModifierType state;
+                        gdk_window_get_pointer(ev->window, &t_x, &t_y, &state);
+                        event_x = t_x;
+                        event_y = t_y;
+                }
 
-               switch (_mouse_state) {
-               case Pressed: // Clicked
-                       switch (editor.current_mouse_mode()) {
-                       case MouseObject:
-                       case MouseTimeFX:
-                               clear_selection();
-                               break;
-                       case MouseRange:
-                       {
-                               bool success;
-                               Evoral::MusicalTime beats = trackview.editor().get_grid_type_as_beats (success, trackview.editor().pixel_to_frame (event_x));
-                               if (!success) {
-                                       beats = 1;
-                               }
+                if (_mouse_state == AddDragging){
+                        event_x = trackview.editor().frame_to_pixel(event_frame);
+               }
 
-                               create_note_at (event_x, event_y, beats);
-                               break;
+                if (_drag_rect) {
+                 
+                        if (event_x > _drag_start_x){
+                                _drag_rect->property_x2() = event_x;
                        }
-                       default:
-                               break;
+                        else {
+                                _drag_rect->property_x1() = event_x;
                        }
-                       _mouse_state = None;
-                       break;
-               case SelectRectDragging: // Select drag done
-                       _mouse_state = None;
-                       delete drag_rect;
-                       drag_rect = 0;
-                       break;
-               case AddDragging: // Add drag done
-                       _mouse_state = None;
-                       if (drag_rect->property_x2() > drag_rect->property_x1() + 2) {
-                               const double x      = drag_rect->property_x1();
-                               const double length = trackview.editor().pixel_to_frame(
-                                                       drag_rect->property_x2() - drag_rect->property_x1());
-
-                               create_note_at(x, drag_rect->property_y1(), frames_to_beats(length));
+                }
+
+                if (_drag_rect && _mouse_state == SelectRectDragging) {
+                        
+                 if (event_y > _drag_start_y){
+                                _drag_rect->property_y2() = event_y;
+                       }
+                        else {
+                                _drag_rect->property_y1() = event_y;
                        }
 
-                       delete drag_rect;
-                       drag_rect = 0;
-               default: break;
-               }
+                       update_drag_selection(_drag_start_x, event_x, _drag_start_y, event_y);
+                }
 
-       default: break;
-       }
+                _last_x = event_x;
+                _last_y = event_y;
 
-       return false;
+        case SelectTouchDragging:
+                return false;
+
+        default:
+                break;
+        }
+
+        return false;
+}
+
+
+bool
+MidiRegionView::scroll (GdkEventScroll* ev)
+{
+        if (_selection.empty()) {
+                return false;
+        }
+
+       trackview.editor().hide_verbose_canvas_cursor ();
+
+        bool fine = !Keyboard::modifier_state_equals (ev->state, Keyboard::SecondaryModifier);
+        
+        if (ev->direction == GDK_SCROLL_UP) {
+                change_velocities (true, fine, false);
+        } else if (ev->direction == GDK_SCROLL_DOWN) {
+                change_velocities (false, fine, false);
+        } 
+        return true;
+}
+
+bool
+MidiRegionView::key_press (GdkEventKey* ev)
+{ 
+        /* since GTK bindings are generally activated on press, and since
+           detectable auto-repeat is the name of the game and only sends
+           repeated presses, carry out key actions at key press, not release.
+        */
+        
+        if (ev->keyval == GDK_Alt_L || ev->keyval == GDK_Alt_R){
+                _mouse_state = SelectTouchDragging;
+                return true;
+                
+        } else if (ev->keyval == GDK_Escape) {
+                clear_selection();
+                _mouse_state = None;
+                
+        } else if (ev->keyval == GDK_comma || ev->keyval == GDK_period) {
+                
+                bool start = (ev->keyval == GDK_comma);
+                bool end = (ev->keyval == GDK_period);
+                bool shorter = Keyboard::modifier_state_contains (ev->state, Keyboard::PrimaryModifier);
+                bool fine = Keyboard::modifier_state_contains (ev->state, Keyboard::SecondaryModifier);
+                
+                change_note_lengths (fine, shorter, 0.0, start, end);
+                
+                return true;
+                
+        } else if (ev->keyval == GDK_Delete) {
+                
+                delete_selection();
+                return true;
+                
+        } else if (ev->keyval == GDK_Tab) {
+                
+                if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
+                        goto_previous_note ();
+                } else {
+                        goto_next_note ();
+                }
+                return true;
+                
+        } else if (ev->keyval == GDK_Up) {
+                
+                bool allow_smush = Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier);
+                bool fine = !Keyboard::modifier_state_contains (ev->state, Keyboard::SecondaryModifier);
+                
+                if (Keyboard::modifier_state_contains (ev->state, Keyboard::PrimaryModifier)) {
+                        change_velocities (true, fine, allow_smush);
+                } else {
+                        transpose (true, fine, allow_smush);
+                }
+                return true;
+                
+        } else if (ev->keyval == GDK_Down) {
+                
+                bool allow_smush = Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier);
+                bool fine = !Keyboard::modifier_state_contains (ev->state, Keyboard::SecondaryModifier);
+                
+                if (Keyboard::modifier_state_contains (ev->state, Keyboard::PrimaryModifier)) {
+                        change_velocities (false, fine, allow_smush);
+                } else {
+                        transpose (false, fine, allow_smush);
+                }
+                return true;
+                
+        } else if (ev->keyval == GDK_Left) {
+                
+                nudge_notes (false);
+                return true;
+                
+        } else if (ev->keyval == GDK_Right) {
+                
+                nudge_notes (true);
+                return true;
+                
+        } else if (ev->keyval == GDK_Control_L) {
+                return true;
+
+        }
+        
+        return false;
+}
+
+bool
+MidiRegionView::key_release (GdkEventKey* ev)
+{
+        if (ev->keyval == GDK_Alt_L || ev->keyval == GDK_Alt_R) {
+                _mouse_state = None;
+                return true;
+        }
+        return false;
 }
 
 void
@@ -552,20 +791,22 @@ MidiRegionView::show_list_editor ()
 /** Add a note to the model, and the view, at a canvas (click) coordinate.
  * \param x horizontal position in pixels
  * \param y vertical position in pixels
- * \param length duration of the note in beats */
+ * \param length duration of the note in beats, which will be snapped to the grid
+ * \param sh true to make the note 1 frame shorter than the snapped version of \a length.
+ */
 void
-MidiRegionView::create_note_at(double x, double y, double length)
+MidiRegionView::create_note_at(double x, double y, double length, bool sh)
 {
        MidiTimeAxisView* const mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
        MidiStreamView* const view = mtv->midi_view();
 
-       double note = midi_stream_view()->y_to_note(y);
+       double note = view->y_to_note(y);
 
        assert(note >= 0.0);
        assert(note <= 127.0);
 
        // Start of note in frames relative to region start
-       nframes64_t const start_frames = snap_frame_to_frame(trackview.editor().pixel_to_frame(x));
+       framepos_t const start_frames = snap_frame_to_frame(trackview.editor().pixel_to_frame(x));
        assert(start_frames >= 0);
 
        // Snap length
@@ -574,9 +815,13 @@ MidiRegionView::create_note_at(double x, double y, double length)
 
        assert (length != 0);
 
-       const boost::shared_ptr<NoteType> new_note(new NoteType(0,
-                       frames_to_beats(start_frames + _region->start()), length,
-                       (uint8_t)note, 0x40));
+       if (sh) {
+               length = frames_to_beats (beats_to_frames (length) - 1);
+       }
+
+       const boost::shared_ptr<NoteType> new_note (new NoteType (get_channel_for_add (),
+                                                                  frames_to_beats(start_frames + _region->start()), length,
+                                                                  (uint8_t)note, 0x40));
 
         if (_model->contains (new_note)) {
                 return;
@@ -584,8 +829,8 @@ MidiRegionView::create_note_at(double x, double y, double length)
 
        view->update_note_range(new_note->note());
 
-       MidiModel::DeltaCommand* cmd = _model->new_delta_command("add note");
-       cmd->add(new_note);
+       MidiModel::NoteDiffCommand* cmd = _model->new_note_diff_command("add note");
+       cmd->add (new_note);
        _model->apply_command(*trackview.session(), cmd);
 
        play_midi_note (new_note);
@@ -608,16 +853,16 @@ MidiRegionView::clear_events()
        }
 
        _events.clear();
-       _pgm_changes.clear();
+       _patch_changes.clear();
        _sys_exes.clear();
        _optimization_iterator = _events.end();
 }
 
-
 void
 MidiRegionView::display_model(boost::shared_ptr<MidiModel> model)
 {
        _model = model;
+       
        content_connection.disconnect ();
        _model->ContentsChanged.connect (content_connection, invalidator (*this), boost::bind (&MidiRegionView::redisplay_model, this), gui_context());
 
@@ -628,28 +873,19 @@ MidiRegionView::display_model(boost::shared_ptr<MidiModel> model)
        }
 }
 
-
-void
-MidiRegionView::start_delta_command(string name)
-{
-       if (!_delta_command) {
-               _delta_command = _model->new_delta_command(name);
-       }
-}
-
 void
-MidiRegionView::start_diff_command(string name)
+MidiRegionView::start_note_diff_command (string name)
 {
-       if (!_diff_command) {
-               _diff_command = _model->new_diff_command(name);
+       if (!_note_diff_command) {
+               _note_diff_command = _model->new_note_diff_command (name);
        }
 }
 
 void
-MidiRegionView::delta_add_note(const boost::shared_ptr<NoteType> note, bool selected, bool show_velocity)
+MidiRegionView::note_diff_add_note (const boost::shared_ptr<NoteType> note, bool selected, bool show_velocity)
 {
-       if (_delta_command) {
-               _delta_command->add(note);
+       if (_note_diff_command) {
+               _note_diff_command->add (note);
        }
        if (selected) {
                _marked_for_selection.insert(note);
@@ -660,114 +896,92 @@ MidiRegionView::delta_add_note(const boost::shared_ptr<NoteType> note, bool sele
 }
 
 void
-MidiRegionView::delta_remove_note(ArdourCanvas::CanvasNoteEvent* ev)
+MidiRegionView::note_diff_remove_note (ArdourCanvas::CanvasNoteEvent* ev)
 {
-       if (_delta_command && ev->note()) {
-               _delta_command->remove(ev->note());
+       if (_note_diff_command && ev->note()) {
+               _note_diff_command->remove(ev->note());
        }
 }
 
 void
-MidiRegionView::diff_add_change (ArdourCanvas::CanvasNoteEvent* ev,
-                                MidiModel::DiffCommand::Property property,
-                                uint8_t val)
+MidiRegionView::note_diff_add_change (ArdourCanvas::CanvasNoteEvent* ev,
+                                     MidiModel::NoteDiffCommand::Property property,
+                                     uint8_t val)
 {
-       if (_diff_command) {
-               _diff_command->change (ev->note(), property, val);
+       if (_note_diff_command) {
+               _note_diff_command->change (ev->note(), property, val);
        }
 }
 
 void
-MidiRegionView::diff_add_change (ArdourCanvas::CanvasNoteEvent* ev,
-                                MidiModel::DiffCommand::Property property,
-                                Evoral::MusicalTime val)
+MidiRegionView::note_diff_add_change (ArdourCanvas::CanvasNoteEvent* ev,
+                                     MidiModel::NoteDiffCommand::Property property,
+                                     Evoral::MusicalTime val)
 {
-       if (_diff_command) {
-               _diff_command->change (ev->note(), property, val);
+       if (_note_diff_command) {
+               _note_diff_command->change (ev->note(), property, val);
        }
 }
 
-void
-MidiRegionView::apply_delta()
-{
-       if (!_delta_command) {
-               return;
-       }
-
-       // Mark all selected notes for selection when model reloads
-       for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
-               _marked_for_selection.insert((*i)->note());
-       }
-
-       _model->apply_command(*trackview.session(), _delta_command);
-       _delta_command = 0;
-       midi_view()->midi_track()->playlist_modified();
-
-       _marked_for_selection.clear();
-       _marked_for_velocity.clear();
-}
-
 void
 MidiRegionView::apply_diff ()
 {
-       if (!_diff_command) {
-               return;
-       }
-
-       _model->apply_command(*trackview.session(), _diff_command);
-       _diff_command = 0;
-       midi_view()->midi_track()->playlist_modified();
-
-       _marked_for_velocity.clear();
-}
+        bool add_or_remove;
 
-void
-MidiRegionView::apply_delta_as_subcommand()
-{
-       if (!_delta_command) {
+       if (!_note_diff_command) {
                return;
        }
 
-       // Mark all selected notes for selection when model reloads
-       for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
-               _marked_for_selection.insert((*i)->note());
-       }
+        if ((add_or_remove = _note_diff_command->adds_or_removes())) {
+                // Mark all selected notes for selection when model reloads
+                for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
+                        _marked_for_selection.insert((*i)->note());
+                }
+        }
 
-       _model->apply_command_as_subcommand(*trackview.session(), _delta_command);
-       _delta_command = 0;
+       _model->apply_command(*trackview.session(), _note_diff_command);
+       _note_diff_command = 0;
        midi_view()->midi_track()->playlist_modified();
+        
+        if (add_or_remove) {
+               _marked_for_selection.clear();
+        }
 
-       _marked_for_selection.clear();
        _marked_for_velocity.clear();
 }
 
 void
-MidiRegionView::apply_diff_as_subcommand()
+MidiRegionView::apply_diff_as_subcommand ()
 {
-       if (!_diff_command) {
+        bool add_or_remove;
+
+       if (!_note_diff_command) {
                return;
        }
 
-       // Mark all selected notes for selection when model reloads
-       for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
-               _marked_for_selection.insert((*i)->note());
-       }
+        if ((add_or_remove = _note_diff_command->adds_or_removes())) {
+                // Mark all selected notes for selection when model reloads
+                for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
+                        _marked_for_selection.insert((*i)->note());
+                }
+        }
 
-       _model->apply_command_as_subcommand(*trackview.session(), _diff_command);
-       _diff_command = 0;
+       _model->apply_command_as_subcommand(*trackview.session(), _note_diff_command);
+       _note_diff_command = 0;
        midi_view()->midi_track()->playlist_modified();
 
-       _marked_for_selection.clear();
+        if (add_or_remove) {
+                _marked_for_selection.clear();
+        }
        _marked_for_velocity.clear();
 }
 
+
 void
 MidiRegionView::abort_command()
 {
-       delete _delta_command;
-       _delta_command = 0;
-       delete _diff_command;
-       _diff_command = 0;
+       delete _note_diff_command;
+       _note_diff_command = 0;
        clear_selection();
 }
 
@@ -791,6 +1005,20 @@ MidiRegionView::find_canvas_note (boost::shared_ptr<NoteType> note)
        return 0;
 }
 
+void
+MidiRegionView::get_events (Events& e, Evoral::Sequence<Evoral::MusicalTime>::NoteOperator op, uint8_t val, int chan_mask)
+{
+        MidiModel::Notes notes;
+        _model->get_notes (notes, op, val, chan_mask);
+
+        for (MidiModel::Notes::iterator n = notes.begin(); n != notes.end(); ++n) {
+                CanvasNoteEvent* cne = find_canvas_note (*n);
+                if (cne) {
+                        e.push_back (cne);
+                }
+        }
+}
+
 void
 MidiRegionView::redisplay_model()
 {
@@ -866,8 +1094,11 @@ MidiRegionView::redisplay_model()
                }
        }
 
+       _patch_changes.clear();
+       _sys_exes.clear();
+       
        display_sysexes();
-       display_program_changes();
+       display_patch_changes ();
 
        _marked_for_selection.clear ();
        _marked_for_velocity.clear ();
@@ -881,52 +1112,40 @@ MidiRegionView::redisplay_model()
 }
 
 void
-MidiRegionView::display_program_changes()
+MidiRegionView::display_patch_changes ()
 {
-       boost::shared_ptr<Evoral::Control> control = _model->control(MidiPgmChangeAutomation);
-       if (!control) {
-               return;
-       }
-
-       Glib::Mutex::Lock lock (control->list()->lock());
-
-       uint8_t channel = control->parameter().channel();
+       MidiTimeAxisView* const mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
+       uint16_t chn_mask = mtv->channel_selector().get_selected_channels();
 
-       for (AutomationList::const_iterator event = control->list()->begin();
-                       event != control->list()->end(); ++event) {
-               double event_time     = (*event)->when;
-               double program_number = floor((*event)->value + 0.5);
+        for (uint8_t i = 0; i < 16; ++i) {
+                if (chn_mask & (1<<i)) {
+                        display_patch_changes_on_channel (i);
+                }
+        }
+}
 
-               // Get current value of bank select MSB at time of the program change
-               Evoral::Parameter bank_select_msb(MidiCCAutomation, channel, MIDI_CTL_MSB_BANK);
-               boost::shared_ptr<Evoral::Control> msb_control = _model->control(bank_select_msb);
-               uint8_t msb = 0;
-               if (msb_control != 0) {
-                       msb = uint8_t(floor(msb_control->get_float(true, event_time) + 0.5));
-               }
+void
+MidiRegionView::display_patch_changes_on_channel (uint8_t channel)
+{
+       for (MidiModel::PatchChanges::const_iterator i = _model->patch_changes().begin(); i != _model->patch_changes().end(); ++i) {
 
-               // Get current value of bank select LSB at time of the program change
-               Evoral::Parameter bank_select_lsb(MidiCCAutomation, channel, MIDI_CTL_LSB_BANK);
-               boost::shared_ptr<Evoral::Control> lsb_control = _model->control(bank_select_lsb);
-               uint8_t lsb = 0;
-               if (lsb_control != 0) {
-                       lsb = uint8_t(floor(lsb_control->get_float(true, event_time) + 0.5));
+               if ((*i)->channel() != channel) {
+                       continue;
                }
-
-               MIDI::Name::PatchPrimaryKey patch_key(msb, lsb, program_number);
+               
+               MIDI::Name::PatchPrimaryKey patch_key ((*i)->bank_msb (), (*i)->bank_lsb (), (*i)->program ());
 
                boost::shared_ptr<MIDI::Name::Patch> patch =
                        MIDI::Name::MidiPatchManager::instance().find_patch(
                                        _model_name, _custom_device_mode, channel, patch_key);
 
-               PCEvent program_change(event_time, uint8_t(program_number), channel);
-
                if (patch != 0) {
-                       add_pgm_change(program_change, patch->name());
+                       add_canvas_patch_change (*i, patch->name());
                } else {
                        char buf[4];
-                       snprintf(buf, 4, "%d", int(program_number));
-                       add_pgm_change(program_change, buf);
+                        // program_number is zero-based: convert to one-based
+                       snprintf (buf, 4, "%d", (*i)->program() + 1);
+                       add_canvas_patch_change (*i, buf);
                }
        }
 }
@@ -948,16 +1167,14 @@ MidiRegionView::display_sysexes()
                }
                string text = str.str();
 
-               ArdourCanvas::Group* const group = (ArdourCanvas::Group*)get_canvas_group();
-
                const double x = trackview.editor().frame_to_pixel(beats_to_frames(time));
 
                double height = midi_stream_view()->contents_height();
 
                boost::shared_ptr<CanvasSysEx> sysex = boost::shared_ptr<CanvasSysEx>(
-                               new CanvasSysEx(*this, *group, text, height, x, 1.0));
+                               new CanvasSysEx(*this, *_note_group, text, height, x, 1.0));
 
-               // Show unless program change is beyond the region bounds
+               // Show unless patch change is beyond the region bounds
                if (time - _region->start() >= _region->length() || time < _region->start()) {
                        sysex->hide();
                } else {
@@ -973,6 +1190,8 @@ MidiRegionView::~MidiRegionView ()
 {
        in_destructor = true;
 
+       trackview.editor().hide_verbose_canvas_cursor ();
+
         note_delete_connection.disconnect ();
 
        delete _list_editor;
@@ -985,8 +1204,11 @@ MidiRegionView::~MidiRegionView ()
 
        _selection.clear();
        clear_events();
+
        delete _note_group;
-       delete _delta_command;
+       delete _note_diff_command;
+        delete _step_edit_cursor;
+       delete _temporary_note_group;
 }
 
 void
@@ -1011,6 +1233,9 @@ MidiRegionView::reset_width_dependent_items (double pixel_width)
        if (_enable_display) {
                redisplay_model();
        }
+        
+        move_step_edit_cursor (_step_edit_cursor_position);
+        set_step_edit_cursor_width (_step_edit_cursor_width);
 }
 
 void
@@ -1028,6 +1253,14 @@ MidiRegionView::set_height (double height)
        if (name_pixbuf) {
                name_pixbuf->raise_to_top();
        }
+        
+        for (PatchChanges::iterator x = _patch_changes.begin(); x != _patch_changes.end(); ++x) {
+                (*x)->set_height (midi_stream_view()->contents_height());
+        }
+
+        if (_step_edit_cursor) {
+                _step_edit_cursor->property_y2() = midi_stream_view()->contents_height();
+        }
 }
 
 
@@ -1069,15 +1302,9 @@ MidiRegionView::apply_note_range (uint8_t min, uint8_t max, bool force)
 
                } else if (CanvasHit* chit = dynamic_cast<CanvasHit*>(event)) {
 
-                       double x = trackview.editor().frame_to_pixel(
-                               beats_to_frames(note->time()) - _region->start());
-                       const double diamond_size = midi_stream_view()->note_height() / 2.0;
-                       double y = midi_stream_view()->note_to_y(event->note()->note())
-                               + ((diamond_size-2.0) / 4.0);
+                       const double diamond_size = update_hit (chit);
 
                        chit->set_height (diamond_size);
-                       chit->move (x - chit->x1(), y - chit->y1());
-                       chit->show ();
                }
        }
 }
@@ -1151,7 +1378,9 @@ MidiRegionView::resolve_note(uint8_t note, double end_time)
        }
 
        if (_active_notes && _active_notes[note]) {
-               const nframes64_t end_time_frames = beats_to_frames(end_time);
+
+               const framepos_t end_time_frames = beats_to_frames(end_time);
+
                _active_notes[note]->property_x2() = trackview.editor().frame_to_pixel(end_time_frames);
                _active_notes[note]->property_outline_what() = (guint32) 0xF; // all edges
                _active_notes[note] = 0;
@@ -1175,6 +1404,7 @@ MidiRegionView::extend_active_notes()
        }
 }
 
+
 void
 MidiRegionView::play_midi_note(boost::shared_ptr<NoteType> note)
 {
@@ -1183,34 +1413,43 @@ MidiRegionView::play_midi_note(boost::shared_ptr<NoteType> note)
        }
 
        RouteUI* route_ui = dynamic_cast<RouteUI*> (&trackview);
-       assert(route_ui);
-
-       route_ui->midi_track()->write_immediate_event(
-                       note->on_event().size(), note->on_event().buffer());
+        
+        if (!route_ui || !route_ui->midi_track()) {
+                return;
+        }
 
-       const double note_length_beats = (note->off_event().time() - note->on_event().time());
-       nframes_t note_length_ms = beats_to_frames(note_length_beats)
-                       * (1000 / (double)route_ui->session()->nominal_frame_rate());
-       Glib::signal_timeout().connect(sigc::bind(sigc::mem_fun(this, &MidiRegionView::play_midi_note_off), note),
-                       note_length_ms, G_PRIORITY_DEFAULT);
+        NotePlayer* np = new NotePlayer (route_ui->midi_track());
+        np->add (note);
+        np->play ();
 }
 
-bool
-MidiRegionView::play_midi_note_off(boost::shared_ptr<NoteType> note)
+void
+MidiRegionView::play_midi_chord (vector<boost::shared_ptr<NoteType> > notes)
 {
+       if (no_sound_notes || !trackview.editor().sound_notes()) {
+               return;
+       }
+
        RouteUI* route_ui = dynamic_cast<RouteUI*> (&trackview);
-       assert(route_ui);
+        
+        if (!route_ui || !route_ui->midi_track()) {
+                return;
+        }
 
-       route_ui->midi_track()->write_immediate_event(
-                       note->off_event().size(), note->off_event().buffer());
+        NotePlayer* np = new NotePlayer (route_ui->midi_track());
 
-       return false;
+        for (vector<boost::shared_ptr<NoteType> >::iterator n = notes.begin(); n != notes.end(); ++n) {
+                np->add (*n);
+        }
+
+        np->play ();
 }
 
+
 bool
 MidiRegionView::note_in_region_range(const boost::shared_ptr<NoteType> note, bool& visible) const
 {
-       const nframes64_t note_start_frames = beats_to_frames(note->time());
+       const framepos_t note_start_frames = beats_to_frames(note->time());
 
        bool outside = (note_start_frames - _region->start() >= _region->length()) ||
                (note_start_frames < _region->start());
@@ -1226,21 +1465,24 @@ MidiRegionView::update_note (CanvasNote* ev)
 {
        boost::shared_ptr<NoteType> note = ev->note();
 
-       const nframes64_t note_start_frames = beats_to_frames(note->time());
-       const nframes64_t note_end_frames   = beats_to_frames(note->end_time());
+       const framepos_t note_start_frames = beats_to_frames(note->time());
+
+       /* trim note display to not overlap the end of its region */
+       const framepos_t note_end_frames = min (beats_to_frames (note->end_time()), _region->start() + _region->length());
 
        const double x = trackview.editor().frame_to_pixel(note_start_frames - _region->start());
        const double y1 = midi_stream_view()->note_to_y(note->note());
-       const double note_endpixel =
-               trackview.editor().frame_to_pixel(note_end_frames - _region->start());
+       const double note_endpixel = trackview.editor().frame_to_pixel(note_end_frames - _region->start());
 
        ev->property_x1() = x;
        ev->property_y1() = y1;
+       
        if (note->length() > 0) {
                ev->property_x2() = note_endpixel;
        } else {
                ev->property_x2() = trackview.editor().frame_to_pixel(_region->length());
        }
+       
        ev->property_y2() = y1 + floor(midi_stream_view()->note_height());
 
        if (note->length() == 0) {
@@ -1264,17 +1506,19 @@ MidiRegionView::update_note (CanvasNote* ev)
        }
 }
 
-void
+double
 MidiRegionView::update_hit (CanvasHit* ev)
 {
        boost::shared_ptr<NoteType> note = ev->note();
 
-       const nframes64_t note_start_frames = beats_to_frames(note->time());
+       const framepos_t note_start_frames = beats_to_frames(note->time());
        const double x = trackview.editor().frame_to_pixel(note_start_frames - _region->start());
        const double diamond_size = midi_stream_view()->note_height() / 2.0;
        const double y = midi_stream_view()->note_to_y(note->note()) + ((diamond_size-2) / 4.0);
 
        ev->move_to (x, y);
+
+       return diamond_size;
 }
 
 /** Add a MIDI note to the view (with length).
@@ -1291,11 +1535,11 @@ MidiRegionView::add_note(const boost::shared_ptr<NoteType> note, bool visible)
        assert(note->time() >= 0);
        assert(midi_view()->note_mode() == Sustained || midi_view()->note_mode() == Percussive);
 
-       ArdourCanvas::Group* const group = (ArdourCanvas::Group*)get_canvas_group();
+       //ArdourCanvas::Group* const group = (ArdourCanvas::Group*) get_canvas_group();
 
        if (midi_view()->note_mode() == Sustained) {
 
-               CanvasNote* ev_rect = new CanvasNote(*this, *group, note);
+               CanvasNote* ev_rect = new CanvasNote(*this, *_note_group, note);
 
                update_note (ev_rect);
 
@@ -1313,7 +1557,7 @@ MidiRegionView::add_note(const boost::shared_ptr<NoteType> note, bool visible)
 
                const double diamond_size = midi_stream_view()->note_height() / 2.0;
 
-               CanvasHit* ev_diamond = new CanvasHit(*this, *group, diamond_size, note);
+               CanvasHit* ev_diamond = new CanvasHit(*this, *_note_group, diamond_size, note);
 
                update_hit (ev_diamond);
 
@@ -1326,11 +1570,12 @@ MidiRegionView::add_note(const boost::shared_ptr<NoteType> note, bool visible)
        if (event) {
                if (_marked_for_selection.find(note) != _marked_for_selection.end()) {
                        note_selected(event, true);
-               }
+                }
 
                if (_marked_for_velocity.find(note) != _marked_for_velocity.end()) {
                        event->show_velocity();
                }
+               
                event->on_channel_selection_change(_last_channel_selection);
                _events.push_back(event);
 
@@ -1340,163 +1585,208 @@ MidiRegionView::add_note(const boost::shared_ptr<NoteType> note, bool visible)
                        event->hide ();
                }
        }
+       
+       MidiTimeAxisView* const mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
+       MidiStreamView* const view = mtv->midi_view();
+
+       view->update_note_range(note->note());
 }
 
 void
-MidiRegionView::add_note (uint8_t channel, uint8_t number, uint8_t velocity,
-                         Evoral::MusicalTime pos, Evoral::MusicalTime len)
+MidiRegionView::step_add_note (uint8_t channel, uint8_t number, uint8_t velocity,
+                               Evoral::MusicalTime pos, Evoral::MusicalTime len)
 {
        boost::shared_ptr<NoteType> new_note (new NoteType (channel, pos, len, number, velocity));
 
-       start_delta_command (_("step add"));
-       delta_add_note (new_note, true, false);
-       apply_delta();
-
        /* potentially extend region to hold new note */
 
-       nframes64_t end_frame = _region->position() + beats_to_frames (new_note->end_time());
-       nframes64_t region_end = _region->position() + _region->length() - 1;
+       framepos_t end_frame = _region->position() + beats_to_frames (new_note->end_time());
+       framepos_t region_end = _region->position() + _region->length() - 1;
 
        if (end_frame > region_end) {
-               _region->set_length (end_frame, this);
-       } else {
-               redisplay_model ();
+               _region->set_length (end_frame - _region->position(), this);
        }
+       
+       MidiTimeAxisView* const mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
+       MidiStreamView* const view = mtv->midi_view();
+
+       view->update_note_range(new_note->note());
+
+        _marked_for_selection.clear ();
+        clear_selection ();
+
+       start_note_diff_command (_("step add"));
+       note_diff_add_note (new_note, true, false);
+       apply_diff();
+
+        // last_step_edit_note = new_note;
 }
 
 void
-MidiRegionView::add_pgm_change(PCEvent& program, const string& displaytext)
+MidiRegionView::step_sustain (Evoral::MusicalTime beats)
 {
-       assert(program.time >= 0);
+        change_note_lengths (false, false, beats, false, true);
+}
 
-       ArdourCanvas::Group* const group = (ArdourCanvas::Group*)get_canvas_group();
-       const double x = trackview.editor().frame_to_pixel(beats_to_frames(program.time));
+void
+MidiRegionView::add_canvas_patch_change (MidiModel::PatchChangePtr patch, const string& displaytext)
+{
+       assert (patch->time() >= 0);
+
+       const double x = trackview.editor().frame_to_pixel (beats_to_frames (patch->time()));
 
-       double height = midi_stream_view()->contents_height();
+       double const height = midi_stream_view()->contents_height();
 
-       boost::shared_ptr<CanvasProgramChange> pgm_change = boost::shared_ptr<CanvasProgramChange>(
-                       new CanvasProgramChange(*this, *group,
+       boost::shared_ptr<CanvasPatchChange> patch_change = boost::shared_ptr<CanvasPatchChange>(
+               new CanvasPatchChange(*this, *_note_group,
                                        displaytext,
                                        height,
                                        x, 1.0,
                                        _model_name,
                                        _custom_device_mode,
-                                       program.time, program.channel, program.value));
+                                       patch)
+               );
+
+       // Show unless patch change is beyond the region bounds
+       if (patch->time() - _region->start() >= _region->length() || patch->time() < _region->start()) {
+               patch_change->hide();
+       } else {
+               patch_change->show();
+       }
+
+       _patch_changes.push_back (patch_change);
+}
 
-       // Show unless program change is beyond the region bounds
-       if (program.time - _region->start() >= _region->length() || program.time < _region->start()) {
-               pgm_change->hide();
+void
+MidiRegionView::get_patch_key_at (Evoral::MusicalTime time, uint8_t channel, MIDI::Name::PatchPrimaryKey& key)
+{
+       MidiModel::PatchChanges::iterator i = _model->patch_change_lower_bound (time);
+       while (i != _model->patch_changes().end() && (*i)->channel() != channel) {
+               ++i;
+       }
+       
+       if (i != _model->patch_changes().end()) {
+               key.msb = (*i)->bank_msb ();
+               key.lsb = (*i)->bank_lsb ();
+               key.program_number = (*i)->program ();
        } else {
-               pgm_change->show();
+               key.msb = key.lsb = key.program_number = 0;
        }
-
-       _pgm_changes.push_back(pgm_change);
+               
+       assert (key.is_sane());
 }
 
+
 void
-MidiRegionView::get_patch_key_at(double time, uint8_t channel, MIDI::Name::PatchPrimaryKey& key)
+MidiRegionView::change_patch_change (CanvasPatchChange& pc, const MIDI::Name::PatchPrimaryKey& new_patch)
 {
-       cerr << "getting patch key at " << time << " for channel " << channel << endl;
-       Evoral::Parameter bank_select_msb(MidiCCAutomation, channel, MIDI_CTL_MSB_BANK);
-       boost::shared_ptr<Evoral::Control> msb_control = _model->control(bank_select_msb);
-       float msb = -1.0;
-       if (msb_control != 0) {
-               msb = int(msb_control->get_float(true, time));
-               cerr << "got msb " << msb;
+       MidiModel::PatchChangeDiffCommand* c = _model->new_patch_change_diff_command (_("alter patch change"));
+       
+       if (pc.patch()->program() != new_patch.program_number) {
+               c->change_program (pc.patch (), new_patch.program_number);
        }
 
-       Evoral::Parameter bank_select_lsb(MidiCCAutomation, channel, MIDI_CTL_LSB_BANK);
-       boost::shared_ptr<Evoral::Control> lsb_control = _model->control(bank_select_lsb);
-       float lsb = -1.0;
-       if (lsb_control != 0) {
-               lsb = lsb_control->get_float(true, time);
-               cerr << " got lsb " << lsb;
+       int const new_bank = (new_patch.msb << 7) | new_patch.lsb;
+       if (pc.patch()->bank() != new_bank) {
+               c->change_bank (pc.patch (), new_bank);
        }
 
-       Evoral::Parameter program_change(MidiPgmChangeAutomation, channel, 0);
-       boost::shared_ptr<Evoral::Control> program_control = _model->control(program_change);
-       float program_number = -1.0;
-       if (program_control != 0) {
-               program_number = program_control->get_float(true, time);
-               cerr << " got program " << program_number << endl;
-       }
+       _model->apply_command (*trackview.session(), c);
 
-       key.msb = (int) floor(msb + 0.5);
-       key.lsb = (int) floor(lsb + 0.5);
-       key.program_number = (int) floor(program_number + 0.5);
-       assert(key.is_sane());
+        _patch_changes.clear ();
+        display_patch_changes ();
 }
 
-
 void
-MidiRegionView::alter_program_change(PCEvent& old_program, const MIDI::Name::PatchPrimaryKey& new_patch)
+MidiRegionView::change_patch_change (MidiModel::PatchChangePtr old_change, const Evoral::PatchChange<Evoral::MusicalTime> & new_change)
 {
-       // TODO: Get the real event here and alter them at the original times
-       Evoral::Parameter bank_select_msb(MidiCCAutomation, old_program.channel, MIDI_CTL_MSB_BANK);
-       boost::shared_ptr<Evoral::Control> msb_control = _model->control(bank_select_msb);
-       if (msb_control != 0) {
-               msb_control->set_float(float(new_patch.msb), true, old_program.time);
+       MidiModel::PatchChangeDiffCommand* c = _model->new_patch_change_diff_command (_("alter patch change"));
+       
+       if (old_change->time() != new_change.time()) {
+               c->change_time (old_change, new_change.time());
        }
 
-       // TODO: Get the real event here and alter them at the original times
-       Evoral::Parameter bank_select_lsb(MidiCCAutomation, old_program.channel, MIDI_CTL_LSB_BANK);
-       boost::shared_ptr<Evoral::Control> lsb_control = _model->control(bank_select_lsb);
-       if (lsb_control != 0) {
-               lsb_control->set_float(float(new_patch.lsb), true, old_program.time);
+       if (old_change->channel() != new_change.channel()) {
+               c->change_channel (old_change, new_change.channel());
+       }
+       
+       if (old_change->program() != new_change.program()) {
+               c->change_program (old_change, new_change.program());
        }
 
-       Evoral::Parameter program_change(MidiPgmChangeAutomation, old_program.channel, 0);
-       boost::shared_ptr<Evoral::Control> program_control = _model->control(program_change);
+       if (old_change->bank() != new_change.bank()) {
+               c->change_bank (old_change, new_change.bank());
+       }
 
-       assert(program_control != 0);
-       program_control->set_float(float(new_patch.program_number), true, old_program.time);
+       _model->apply_command (*trackview.session(), c);
 
-       redisplay_model();
+        _patch_changes.clear ();
+        display_patch_changes ();
 }
 
+/** Add a patch change to the region.
+ *  @param t Time in frames relative to region position
+ *  @param patch Patch to add; time and channel are ignored (time is converted from t, and channel comes from
+ *  get_channel_for_add())
+ */
 void
-MidiRegionView::program_selected(CanvasProgramChange& program, const MIDI::Name::PatchPrimaryKey& new_patch)
+MidiRegionView::add_patch_change (framecnt_t t, Evoral::PatchChange<Evoral::MusicalTime> const & patch)
 {
-       PCEvent program_change_event(program.event_time(), program.program(), program.channel());
-       alter_program_change(program_change_event, new_patch);
+       MidiModel::PatchChangeDiffCommand* c = _model->new_patch_change_diff_command (_("add patch change"));
+       c->add (MidiModel::PatchChangePtr (
+                       new Evoral::PatchChange<Evoral::MusicalTime> (
+                               frames_to_beats (t + midi_region()->start()), get_channel_for_add(), patch.program(), patch.bank()
+                               )
+                       ));
+                       
+       _model->apply_command (*trackview.session(), c);
+       
+       _patch_changes.clear ();
+       display_patch_changes ();
 }
 
 void
-MidiRegionView::previous_program(CanvasProgramChange& program)
+MidiRegionView::move_patch_change (CanvasPatchChange& pc, Evoral::MusicalTime t)
 {
-       MIDI::Name::PatchPrimaryKey key;
-       get_patch_key_at(program.event_time(), program.channel(), key);
+       MidiModel::PatchChangeDiffCommand* c = _model->new_patch_change_diff_command (_("move patch change"));
+       c->change_time (pc.patch (), t);
+       _model->apply_command (*trackview.session(), c);
 
-       boost::shared_ptr<MIDI::Name::Patch> patch =
-               MIDI::Name::MidiPatchManager::instance().previous_patch(
-                               _model_name,
-                               _custom_device_mode,
-                               program.channel(),
-                               key);
-
-       PCEvent program_change_event(program.event_time(), program.program(), program.channel());
-       if (patch) {
-               alter_program_change(program_change_event, patch->patch_primary_key());
-       }
+       _patch_changes.clear ();
+       display_patch_changes ();
 }
 
 void
-MidiRegionView::next_program(CanvasProgramChange& program)
+MidiRegionView::delete_patch_change (CanvasPatchChange* pc)
 {
-       MIDI::Name::PatchPrimaryKey key;
-       get_patch_key_at(program.event_time(), program.channel(), key);
+       MidiModel::PatchChangeDiffCommand* c = _model->new_patch_change_diff_command (_("delete patch change"));
+       c->remove (pc->patch ());
+       _model->apply_command (*trackview.session(), c);
 
-       boost::shared_ptr<MIDI::Name::Patch> patch =
-               MIDI::Name::MidiPatchManager::instance().next_patch(
-                               _model_name,
-                               _custom_device_mode,
-                               program.channel(),
-                               key);
+       _patch_changes.clear ();
+       display_patch_changes ();
+}
+                          
+void
+MidiRegionView::previous_patch (CanvasPatchChange& patch)
+{
+        if (patch.patch()->program() < 127) {
+                MIDI::Name::PatchPrimaryKey key;
+                get_patch_key_at (patch.patch()->time(), patch.patch()->channel(), key);
+                key.program_number++;
+                change_patch_change (patch, key);
+        }
+}
 
-       PCEvent program_change_event(program.event_time(), program.program(), program.channel());
-       if (patch) {
-               alter_program_change(program_change_event, patch->patch_primary_key());
-       }
+void
+MidiRegionView::next_patch (CanvasPatchChange& patch)
+{
+        if (patch.patch()->program() > 0) {
+                MIDI::Name::PatchPrimaryKey key;
+                get_patch_key_at (patch.patch()->time(), patch.patch()->channel(), key);
+                key.program_number--;
+                change_patch_change (patch, key);
+        }
 }
 
 void
@@ -1518,25 +1808,25 @@ MidiRegionView::delete_selection()
                return;
        }
 
-       start_delta_command (_("delete selection"));
+       start_note_diff_command (_("delete selection"));
 
        for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
                if ((*i)->selected()) {
-                       _delta_command->remove((*i)->note());
+                       _note_diff_command->remove((*i)->note());
                }
        }
 
        _selection.clear();
 
-       apply_delta ();
+       apply_diff ();
 }
 
 void
 MidiRegionView::delete_note (boost::shared_ptr<NoteType> n)
 {
-       start_delta_command (_("delete note"));
-       _delta_command->remove (n);
-       apply_delta ();
+       start_note_diff_command (_("delete note"));
+       _note_diff_command->remove (n);
+       apply_diff ();
 
        trackview.editor().hide_verbose_canvas_cursor ();
 }
@@ -1546,7 +1836,7 @@ MidiRegionView::clear_selection_except(ArdourCanvas::CanvasNoteEvent* ev)
 {
        for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
                if ((*i)->selected() && (*i) != ev) {
-                       (*i)->selected(false);
+                       (*i)->set_selected(false);
                        (*i)->hide_velocity();
                }
        }
@@ -1563,7 +1853,7 @@ MidiRegionView::unique_select(ArdourCanvas::CanvasNoteEvent* ev)
                        Selection::iterator tmp = i;
                        ++tmp;
 
-                       (*i)->selected (false);
+                       (*i)->set_selected (false);
                        _selection.erase (i);
 
                        i = tmp;
@@ -1583,6 +1873,16 @@ MidiRegionView::unique_select(ArdourCanvas::CanvasNoteEvent* ev)
        }
 }
 
+void
+MidiRegionView::select_all_notes ()
+{
+        clear_selection ();
+
+       for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
+                add_to_selection (*i);
+        }
+}
+
 void
 MidiRegionView::select_matching_notes (uint8_t notenum, uint16_t channel_mask, bool add, bool extend)
 {
@@ -1591,6 +1891,10 @@ MidiRegionView::select_matching_notes (uint8_t notenum, uint16_t channel_mask, b
        MidiModel::Notes& notes (_model->notes());
        _optimization_iterator = _events.begin();
 
+        if (!add) {
+                clear_selection ();
+        }
+
        if (extend && _selection.empty()) {
                extend = false;
        }
@@ -1620,7 +1924,7 @@ MidiRegionView::select_matching_notes (uint8_t notenum, uint16_t channel_mask, b
                CanvasNoteEvent* cne;
                bool select = false;
 
-               if (((0x0001 << note->channel()) & channel_mask) != 0) {
+               if (((1 << note->channel()) & channel_mask) != 0) {
                        if (extend) {
                                if ((note->note() >= low_note && note->note() <= high_note)) {
                                        select = true;
@@ -1684,7 +1988,7 @@ MidiRegionView::note_selected(ArdourCanvas::CanvasNoteEvent* ev, bool add, bool
        } else {
                /* find end of latest note selected, select all between that and the start of "ev" */
 
-               Evoral::MusicalTime earliest = DBL_MAX;
+               Evoral::MusicalTime earliest = Evoral::MaxMusicalTime;
                Evoral::MusicalTime latest = 0;
 
                for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
@@ -1786,7 +2090,7 @@ MidiRegionView::remove_from_selection (CanvasNoteEvent* ev)
                _selection.erase (i);
        }
 
-       ev->selected (false);
+       ev->set_selected (false);
        ev->hide_velocity ();
 
        if (_selection.empty()) {
@@ -1805,9 +2109,9 @@ MidiRegionView::add_to_selection (CanvasNoteEvent* ev)
        }
 
        if (_selection.insert (ev).second) {
-               ev->selected (true);
+               ev->set_selected (true);
                play_midi_note ((ev)->note());
-       }
+        }
 
        if (add_mrv_selection) {
                PublicEditor& editor (trackview.editor());
@@ -1816,15 +2120,50 @@ MidiRegionView::add_to_selection (CanvasNoteEvent* ev)
 }
 
 void
-MidiRegionView::move_selection(double dx, double dy)
+MidiRegionView::move_selection(double dx, double dy, double cumulative_dy)
 {
+        typedef vector<boost::shared_ptr<NoteType> > PossibleChord;
+        PossibleChord to_play;
+        Evoral::MusicalTime earliest = Evoral::MaxMusicalTime;
+
+       for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
+                if ((*i)->note()->time() < earliest) {
+                        earliest = (*i)->note()->time();
+                }
+        }
+
        for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
+                if (Evoral::musical_time_equal ((*i)->note()->time(), earliest)) {
+                        to_play.push_back ((*i)->note());
+                }
                (*i)->move_event(dx, dy);
-       }
+        }
+
+        if (dy && !_selection.empty() && !no_sound_notes && trackview.editor().sound_notes()) {
+
+                if (to_play.size() > 1) {
+
+                        PossibleChord shifted;
+
+                        for (PossibleChord::iterator n = to_play.begin(); n != to_play.end(); ++n) {
+                                boost::shared_ptr<NoteType> moved_note (new NoteType (**n));
+                                moved_note->set_note (moved_note->note() + cumulative_dy);
+                                shifted.push_back (moved_note);
+                        }
+
+                        play_midi_chord (shifted);
+
+                } else if (!to_play.empty()) {
+
+                        boost::shared_ptr<NoteType> moved_note (new NoteType (*to_play.front()));
+                        moved_note->set_note (moved_note->note() + cumulative_dy);
+                        play_midi_note (moved_note);
+                }
+        }
 }
 
 void
-MidiRegionView::note_dropped(CanvasNoteEvent *, double dt, int8_t dnote)
+MidiRegionView::note_dropped(CanvasNoteEvent *, frameoffset_t dt, int8_t dnote)
 {
        assert (!_selection.empty());
 
@@ -1855,25 +2194,17 @@ MidiRegionView::note_dropped(CanvasNoteEvent *, double dt, int8_t dnote)
                highest_note_difference = highest_note_in_selection - 127;
        }
 
-       start_diff_command(_("move notes"));
+       start_note_diff_command (_("move notes"));
 
        for (Selection::iterator i = _selection.begin(); i != _selection.end() ; ++i) {
 
-               nframes64_t start_frames = beats_to_frames((*i)->note()->time());
-
-               if (dt >= 0) {
-                       start_frames += snap_frame_to_frame(trackview.editor().pixel_to_frame(dt));
-               } else {
-                       start_frames -= snap_frame_to_frame(trackview.editor().pixel_to_frame(-dt));
-               }
-
-               Evoral::MusicalTime new_time = frames_to_beats(start_frames);
+               Evoral::MusicalTime new_time = frames_to_beats (beats_to_frames ((*i)->note()->time()) + dt);
 
                if (new_time < 0) {
                        continue;
                }
 
-               diff_add_change (*i, MidiModel::DiffCommand::StartTime, new_time);
+               note_diff_add_change (*i, MidiModel::NoteDiffCommand::StartTime, new_time);
 
                uint8_t original_pitch = (*i)->note()->note();
                uint8_t new_pitch      = original_pitch + dnote - highest_note_difference;
@@ -1890,7 +2221,7 @@ MidiRegionView::note_dropped(CanvasNoteEvent *, double dt, int8_t dnote)
                lowest_note_in_selection  = std::min(lowest_note_in_selection,  new_pitch);
                highest_note_in_selection = std::max(highest_note_in_selection, new_pitch);
 
-               diff_add_change (*i, MidiModel::DiffCommand::NoteNumber, new_pitch);
+               note_diff_add_change (*i, MidiModel::NoteDiffCommand::NoteNumber, new_pitch);
        }
 
        apply_diff();
@@ -1902,22 +2233,22 @@ MidiRegionView::note_dropped(CanvasNoteEvent *, double dt, int8_t dnote)
        }
 }
 
-nframes64_t
+framepos_t
 MidiRegionView::snap_pixel_to_frame(double x)
 {
        PublicEditor& editor = trackview.editor();
        // x is region relative, convert it to global absolute frames
-       nframes64_t frame = editor.pixel_to_frame(x) + _region->position();
+       framepos_t frame = editor.pixel_to_frame(x) + _region->position();
        editor.snap_to(frame);
        return frame - _region->position(); // convert back to region relative
 }
 
-nframes64_t
-MidiRegionView::snap_frame_to_frame(nframes64_t x)
+framepos_t
+MidiRegionView::snap_frame_to_frame(framepos_t x)
 {
        PublicEditor& editor = trackview.editor();
        // x is region relative, convert it to global absolute frames
-       nframes64_t frame = x + _region->position();
+       framepos_t frame = x + _region->position();
        editor.snap_to(frame);
        return frame - _region->position(); // convert back to region relative
 }
@@ -1931,25 +2262,25 @@ MidiRegionView::snap_to_pixel(double x)
 double
 MidiRegionView::get_position_pixels()
 {
-       nframes64_t region_frame = get_position();
+       framepos_t region_frame = get_position();
        return trackview.editor().frame_to_pixel(region_frame);
 }
 
 double
 MidiRegionView::get_end_position_pixels()
 {
-       nframes64_t frame = get_position() + get_duration ();
+       framepos_t frame = get_position() + get_duration ();
        return trackview.editor().frame_to_pixel(frame);
 }
 
-nframes64_t
+framepos_t
 MidiRegionView::beats_to_frames(double beats) const
 {
        return _time_converter.to(beats);
 }
 
 double
-MidiRegionView::frames_to_beats(nframes64_t frames) const
+MidiRegionView::frames_to_beats(framepos_t frames) const
 {
        return _time_converter.from(frames);
 }
@@ -1969,7 +2300,7 @@ MidiRegionView::begin_resizing (bool /*at_front*/)
 
                        // create a new SimpleRect from the note which will be the resize preview
                        SimpleRect *resize_rect = new SimpleRect(
-                                       *group, note->x1(), note->y1(), note->x2(), note->y2());
+                                       *_note_group, note->x1(), note->y1(), note->x2(), note->y2());
 
                        // calculate the colors: get the color settings
                        uint32_t fill_color = UINT_RGBA_CHANGE_A(
@@ -1981,7 +2312,7 @@ MidiRegionView::begin_resizing (bool /*at_front*/)
 
                        // calculate color based on note velocity
                        resize_rect->property_fill_color_rgba() = UINT_INTERPOLATE(
-                                       CanvasNoteEvent::meter_style_fill_color(note->note()->velocity()),
+                                CanvasNoteEvent::meter_style_fill_color(note->note()->velocity(), note->selected()),
                                        fill_color,
                                        0.85);
 
@@ -1994,9 +2325,20 @@ MidiRegionView::begin_resizing (bool /*at_front*/)
        }
 }
 
+/** Update resizing notes while user drags.
+ * @param primary `primary' note for the drag; ie the one that is used as the reference in non-relative mode.
+ * @param at_front which end of the note (true == note on, false == note off)
+ * @param delta_x change in mouse position since the start of the drag 
+ * @param relative true if relative resizing is taking place, false if absolute resizing.  This only makes
+ * 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.
+ */
 void
-MidiRegionView::update_resizing (bool at_front, double delta_x, bool relative)
+MidiRegionView::update_resizing (ArdourCanvas::CanvasNoteEvent* primary, bool at_front, double delta_x, bool relative)
 {
+        bool cursor_set = false;
+
        for (std::vector<NoteResizeData *>::iterator i = _resize_data.begin(); i != _resize_data.end(); ++i) {
                SimpleRect* resize_rect = (*i)->resize_rect;
                CanvasNote* canvas_note = (*i)->canvas_note;
@@ -2006,15 +2348,13 @@ MidiRegionView::update_resizing (bool at_front, double delta_x, bool relative)
                        if (relative) {
                                current_x = canvas_note->x1() + delta_x;
                        } else {
-                               // x is in track relative, transform it to region relative
-                               current_x = delta_x - get_position_pixels();
+                               current_x = primary->x1() + delta_x;
                        }
                } else {
                        if (relative) {
                                current_x = canvas_note->x2() + delta_x;
                        } else {
-                               // x is in track relative, transform it to region relative
-                               current_x = delta_x - get_end_position_pixels ();
+                               current_x = primary->x2() + delta_x;
                        }
                }
 
@@ -2025,33 +2365,65 @@ MidiRegionView::update_resizing (bool at_front, double delta_x, bool relative)
                        resize_rect->property_x2() = snap_to_pixel(current_x);
                        resize_rect->property_x1() = canvas_note->x1();
                }
+
+                if (!cursor_set) {
+                        double beats;
+
+                        beats = snap_pixel_to_frame (current_x);
+                        beats = frames_to_beats (beats);
+                        
+                        double len;
+
+                        if (at_front) {
+                                if (beats < canvas_note->note()->end_time()) {
+                                        len = canvas_note->note()->time() - beats;
+                                        len += canvas_note->note()->length();
+                                } else {
+                                        len = 0;
+                                }
+                        } else {
+                                if (beats >= canvas_note->note()->time()) { 
+                                        len = beats - canvas_note->note()->time();
+                                } else {
+                                        len = 0;
+                                }
+                        }
+
+                        char buf[16];
+                        snprintf (buf, sizeof (buf), "%.3g beats", len);
+                        trackview.editor().show_verbose_canvas_cursor_with (buf);
+
+                        cursor_set = true;
+                }
+
        }
 }
 
+
+/** Finish resizing notes when the user releases the mouse button.
+ *  Parameters the same as for \a update_resizing().
+ */
 void
-MidiRegionView::commit_resizing (bool at_front, double delta_x, bool relative)
+MidiRegionView::commit_resizing (ArdourCanvas::CanvasNoteEvent* primary, bool at_front, double delta_x, bool relative)
 {
-       start_diff_command(_("resize notes"));
+       start_note_diff_command (_("resize notes"));
 
        for (std::vector<NoteResizeData *>::iterator i = _resize_data.begin(); i != _resize_data.end(); ++i) {
                CanvasNote*  canvas_note = (*i)->canvas_note;
                SimpleRect*  resize_rect = (*i)->resize_rect;
-               const double region_start = get_position_pixels();
                double current_x;
 
                if (at_front) {
                        if (relative) {
                                current_x = canvas_note->x1() + delta_x;
                        } else {
-                               // x is in track relative, transform it to region relative
-                               current_x = region_start + delta_x;
+                               current_x = primary->x1() + delta_x;
                        }
                } else {
                        if (relative) {
                                current_x = canvas_note->x2() + delta_x;
                        } else {
-                               // x is in track relative, transform it to region relative
-                               current_x = region_start + delta_x;
+                               current_x = primary->x2() + delta_x;
                        }
                }
 
@@ -2059,14 +2431,14 @@ MidiRegionView::commit_resizing (bool at_front, double delta_x, bool relative)
                current_x = frames_to_beats (current_x);
 
                if (at_front && current_x < canvas_note->note()->end_time()) {
-                       diff_add_change (canvas_note, MidiModel::DiffCommand::StartTime, current_x);
+                       note_diff_add_change (canvas_note, MidiModel::NoteDiffCommand::StartTime, current_x);
 
                        double len = canvas_note->note()->time() - current_x;
                        len += canvas_note->note()->length();
 
                        if (len > 0) {
                                /* XXX convert to beats */
-                               diff_add_change (canvas_note, MidiModel::DiffCommand::Length, len);
+                               note_diff_add_change (canvas_note, MidiModel::NoteDiffCommand::Length, len);
                        }
                }
 
@@ -2075,7 +2447,7 @@ MidiRegionView::commit_resizing (bool at_front, double delta_x, bool relative)
 
                        if (len > 0) {
                                /* XXX convert to beats */
-                               diff_add_change (canvas_note, MidiModel::DiffCommand::Length, len);
+                               note_diff_add_change (canvas_note, MidiModel::NoteDiffCommand::Length, len);
                        }
                }
 
@@ -2087,6 +2459,12 @@ MidiRegionView::commit_resizing (bool at_front, double delta_x, bool relative)
        apply_diff();
 }
 
+void
+MidiRegionView::change_note_channel (CanvasNoteEvent* event, int8_t channel)
+{
+       note_diff_add_change (event, MidiModel::NoteDiffCommand::Channel, (uint8_t) channel);
+}
+
 void
 MidiRegionView::change_note_velocity(CanvasNoteEvent* event, int8_t velocity, bool relative)
 {
@@ -2099,7 +2477,9 @@ MidiRegionView::change_note_velocity(CanvasNoteEvent* event, int8_t velocity, bo
                new_velocity = velocity;
        }
 
-       diff_add_change (event, MidiModel::DiffCommand::Velocity, new_velocity);
+        event->set_selected (event->selected()); // change color 
+        
+       note_diff_add_change (event, MidiModel::NoteDiffCommand::Velocity, new_velocity);
 }
 
 void
@@ -2114,7 +2494,7 @@ MidiRegionView::change_note_note (CanvasNoteEvent* event, int8_t note, bool rela
        }
 
        clamp_to_0_127 (new_note);
-       diff_add_change (event, MidiModel::DiffCommand::NoteNumber, new_note);
+       note_diff_add_change (event, MidiModel::NoteDiffCommand::NoteNumber, new_note);
 }
 
 void
@@ -2122,8 +2502,8 @@ MidiRegionView::trim_note (CanvasNoteEvent* event, Evoral::MusicalTime front_del
 {
        bool change_start = false;
        bool change_length = false;
-       Evoral::MusicalTime new_start;
-       Evoral::MusicalTime new_length;
+       Evoral::MusicalTime new_start = 0;
+       Evoral::MusicalTime new_length = 0;
 
        /* NOTE: the semantics of the two delta arguments are slightly subtle:
 
@@ -2181,11 +2561,11 @@ MidiRegionView::trim_note (CanvasNoteEvent* event, Evoral::MusicalTime front_del
        }
 
        if (change_start) {
-               diff_add_change (event, MidiModel::DiffCommand::StartTime, new_start);
+               note_diff_add_change (event, MidiModel::NoteDiffCommand::StartTime, new_start);
        }
 
        if (change_length) {
-               diff_add_change (event, MidiModel::DiffCommand::Length, new_length);
+               note_diff_add_change (event, MidiModel::NoteDiffCommand::Length, new_length);
        }
 }
 
@@ -2208,7 +2588,13 @@ MidiRegionView::change_note_time (CanvasNoteEvent* event, Evoral::MusicalTime de
                new_time = delta;
        }
 
-       diff_add_change (event, MidiModel::DiffCommand::StartTime, new_time);
+       note_diff_add_change (event, MidiModel::NoteDiffCommand::StartTime, new_time);
+}
+
+void
+MidiRegionView::change_note_length (CanvasNoteEvent* event, Evoral::MusicalTime t)
+{
+       note_diff_add_change (event, MidiModel::NoteDiffCommand::Length, t);
 }
 
 void
@@ -2238,7 +2624,7 @@ MidiRegionView::change_velocities (bool up, bool fine, bool allow_smush)
                }
        }
 
-       start_diff_command(_("change velocities"));
+       start_note_diff_command (_("change velocities"));
 
        for (Selection::iterator i = _selection.begin(); i != _selection.end();) {
                Selection::iterator next = i;
@@ -2248,6 +2634,13 @@ MidiRegionView::change_velocities (bool up, bool fine, bool allow_smush)
        }
 
        apply_diff();
+       
+        if (!_selection.empty()) {
+                char buf[24];
+                snprintf (buf, sizeof (buf), "Vel %d", 
+                          (int) (*_selection.begin())->note()->velocity());
+                trackview.editor().show_verbose_canvas_cursor_with (buf, 10, 10);
+        }
 }
 
 
@@ -2284,7 +2677,7 @@ MidiRegionView::transpose (bool up, bool fine, bool allow_smush)
                }
        }
 
-       start_diff_command (_("transpose"));
+       start_note_diff_command (_("transpose"));
 
        for (Selection::iterator i = _selection.begin(); i != _selection.end(); ) {
                Selection::iterator next = i;
@@ -2297,28 +2690,28 @@ MidiRegionView::transpose (bool up, bool fine, bool allow_smush)
 }
 
 void
-MidiRegionView::change_note_lengths (bool fine, bool shorter, bool start, bool end)
+MidiRegionView::change_note_lengths (bool fine, bool shorter, Evoral::MusicalTime delta, bool start, bool end)
 {
-       Evoral::MusicalTime delta;
-
-       if (fine) {
-               delta = 1.0/128.0;
-       } else {
-               /* grab the current grid distance */
-               bool success;
-               delta = trackview.editor().get_grid_type_as_beats (success, _region->position());
-               if (!success) {
-                       /* XXX cannot get grid type as beats ... should always be possible ... FIX ME */
-                       cerr << "Grid type not available as beats - TO BE FIXED\n";
-                       return;
-               }
-       }
+        if (delta == 0.0) {
+                if (fine) {
+                        delta = 1.0/128.0;
+                } else {
+                        /* grab the current grid distance */
+                        bool success;
+                        delta = trackview.editor().get_grid_type_as_beats (success, _region->position());
+                        if (!success) {
+                                /* XXX cannot get grid type as beats ... should always be possible ... FIX ME */
+                                cerr << "Grid type not available as beats - TO BE FIXED\n";
+                                return;
+                        }
+                }
+        }
 
        if (shorter) {
                delta = -delta;
        }
 
-       start_diff_command (_("change note lengths"));
+       start_note_diff_command (_("change note lengths"));
 
        for (Selection::iterator i = _selection.begin(); i != _selection.end(); ) {
                Selection::iterator next = i;
@@ -2346,9 +2739,9 @@ MidiRegionView::nudge_notes (bool forward)
           into a vector and sort before using the first one.
        */
 
-       nframes64_t ref_point = _region->position() + beats_to_frames ((*(_selection.begin()))->note()->time());
-       nframes64_t unused;
-       nframes64_t distance;
+       framepos_t ref_point = _region->position() + beats_to_frames ((*(_selection.begin()))->note()->time());
+       framepos_t unused;
+       framepos_t distance;
 
        if (trackview.editor().snap_mode() == Editing::SnapOff) {
                
@@ -2360,11 +2753,12 @@ MidiRegionView::nudge_notes (bool forward)
 
                /* use grid */
 
-               nframes64_t next_pos = ref_point;
+               framepos_t next_pos = ref_point;
 
                if (forward) {
-                       /* XXX need check on max_frames, but that needs max_frames64 or something */
-                       next_pos += 1;
+                       if (max_framepos - 1 < next_pos) {
+                                next_pos += 1;
+                        }
                } else {
                        if (next_pos == 0) {
                                return;
@@ -2372,10 +2766,8 @@ MidiRegionView::nudge_notes (bool forward)
                        next_pos -= 1;
                }
 
-               cerr << "ref point was " << ref_point << " next was " << next_pos;
                trackview.editor().snap_to (next_pos, (forward ? 1 : -1), false);
                distance = ref_point - next_pos;
-               cerr << " final is " << next_pos << " distance = " << distance << endl;
        }
 
        if (distance == 0) {
@@ -2388,7 +2780,7 @@ MidiRegionView::nudge_notes (bool forward)
                delta = -delta;
        }
 
-       start_diff_command (_("nudge"));
+       start_note_diff_command (_("nudge"));
 
        for (Selection::iterator i = _selection.begin(); i != _selection.end(); ) {
                Selection::iterator next = i;
@@ -2403,10 +2795,11 @@ MidiRegionView::nudge_notes (bool forward)
 void
 MidiRegionView::change_channel(uint8_t channel)
 {
-       start_diff_command(_("change channel"));
+       start_note_diff_command(_("change channel"));
        for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
-               diff_add_change (*i, MidiModel::DiffCommand::Channel, channel);
+               note_diff_add_change (*i, MidiModel::NoteDiffCommand::Channel, channel);
        }
+
        apply_diff();
 }
 
@@ -2414,30 +2807,62 @@ MidiRegionView::change_channel(uint8_t channel)
 void
 MidiRegionView::note_entered(ArdourCanvas::CanvasNoteEvent* ev)
 {
+       Editor* editor = dynamic_cast<Editor*>(&trackview.editor());
+        
+        pre_enter_cursor = editor->get_canvas_cursor ();
+
        if (_mouse_state == SelectTouchDragging) {
-               note_selected(ev, true);
+               note_selected (ev, true);
        }
 
-       char buf[12];
-       snprintf (buf, sizeof (buf), "%s (%d)", Evoral::midi_note_name (ev->note()->note()).c_str(), (int) ev->note()->note());
-       PublicEditor& editor (trackview.editor());
-       editor.show_verbose_canvas_cursor_with (buf);
+       show_verbose_canvas_cursor (ev->note ());
 }
 
 void
 MidiRegionView::note_left (ArdourCanvas::CanvasNoteEvent*)
 {
-       PublicEditor& editor (trackview.editor());
-       editor.hide_verbose_canvas_cursor ();
+       Editor* editor = dynamic_cast<Editor*>(&trackview.editor());
+
+       for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
+               (*i)->hide_velocity ();
+       }
+
+       editor->hide_verbose_canvas_cursor ();
+
+        if (pre_enter_cursor) {
+                editor->set_canvas_cursor (pre_enter_cursor);
+                pre_enter_cursor = 0;
+        }
+}
+
+void
+MidiRegionView::patch_entered (ArdourCanvas::CanvasPatchChange* ev)
+{
+       ostringstream s;
+       s << ((int) ev->patch()->program() + 1) << ":" << (ev->patch()->bank() + 1);
+       trackview.editor().show_verbose_canvas_cursor_with (s.str().c_str(), 10, 20);
 }
 
+void
+MidiRegionView::patch_left (ArdourCanvas::CanvasPatchChange *)
+{
+       trackview.editor().hide_verbose_canvas_cursor ();
+}
 
 void
-MidiRegionView::switch_source(boost::shared_ptr<Source> src)
+MidiRegionView::note_mouse_position (float x_fraction, float /*y_fraction*/, bool can_set_cursor)
 {
-       boost::shared_ptr<MidiSource> msrc = boost::dynamic_pointer_cast<MidiSource>(src);
-       if (msrc)
-               display_model(msrc->model());
+       Editor* editor = dynamic_cast<Editor*>(&trackview.editor());
+
+        if (x_fraction > 0.0 && x_fraction < 0.25) {
+                editor->set_canvas_cursor (editor->cursors()->left_side_trim);
+        } else if (x_fraction >= 0.75 && x_fraction < 1.0) {
+                editor->set_canvas_cursor (editor->cursors()->right_side_trim);
+        } else {
+                if (pre_enter_cursor && can_set_cursor) {
+                        editor->set_canvas_cursor (pre_enter_cursor);
+                }
+        }
 }
 
 void
@@ -2471,6 +2896,9 @@ MidiRegionView::midi_channel_mode_changed(ChannelMode mode, uint16_t mask)
        }
 
        _last_channel_selection = mask;
+
+       _patch_changes.clear ();
+       display_patch_changes ();
 }
 
 void
@@ -2501,7 +2929,7 @@ MidiRegionView::cut_copy_clear (Editing::CutCopyOp op)
 
         if (op != Copy) {
 
-                start_delta_command();
+                start_note_diff_command();
                 
                 for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
                         switch (op) {
@@ -2509,12 +2937,12 @@ MidiRegionView::cut_copy_clear (Editing::CutCopyOp op)
                                 break;
                         case Cut:
                         case Clear:
-                                delta_remove_note (*i);
+                                note_diff_remove_note (*i);
                                 break;
                         }
                 }
                 
-                apply_delta();
+                apply_diff();
         }
 }
 
@@ -2535,30 +2963,28 @@ MidiRegionView::selection_as_cut_buffer () const
 }
 
 void
-MidiRegionView::paste (nframes64_t pos, float times, const MidiCutBuffer& mcb)
+MidiRegionView::paste (framepos_t pos, float times, const MidiCutBuffer& mcb)
 {
        if (mcb.empty()) {
                return;
        }
 
-       start_delta_command (_("paste"));
+       start_note_diff_command (_("paste"));
 
        Evoral::MusicalTime beat_delta;
        Evoral::MusicalTime paste_pos_beats;
        Evoral::MusicalTime duration;
-       Evoral::MusicalTime end_point;
+       Evoral::MusicalTime end_point = 0;
 
        duration = (*mcb.notes().rbegin())->end_time() - (*mcb.notes().begin())->time();
        paste_pos_beats = frames_to_beats (pos - _region->position());
        beat_delta = (*mcb.notes().begin())->time() - paste_pos_beats;
        paste_pos_beats = 0;
 
-       _selection.clear ();
+        clear_selection ();
 
        for (int n = 0; n < (int) times; ++n) {
 
-                cerr << "Pasting " << mcb.notes().size() << " for the " << n+1 << "th time\n";
-                
                for (Notes::const_iterator i = mcb.notes().begin(); i != mcb.notes().end(); ++i) {
 
                        boost::shared_ptr<NoteType> copied_note (new NoteType (*((*i).get())));
@@ -2566,7 +2992,7 @@ MidiRegionView::paste (nframes64_t pos, float times, const MidiCutBuffer& mcb)
 
                        /* make all newly added notes selected */
 
-                       delta_add_note (copied_note, true);
+                       note_diff_add_note (copied_note, true);
                        end_point = copied_note->end_time();
                }
 
@@ -2575,22 +3001,19 @@ MidiRegionView::paste (nframes64_t pos, float times, const MidiCutBuffer& mcb)
 
        /* if we pasted past the current end of the region, extend the region */
 
-       nframes64_t end_frame = _region->position() + beats_to_frames (end_point);
-       nframes64_t region_end = _region->position() + _region->length() - 1;
+       framepos_t end_frame = _region->position() + beats_to_frames (end_point);
+       framepos_t region_end = _region->position() + _region->length() - 1;
 
        if (end_frame > region_end) {
 
-                cerr << "region end is now " << end_frame << " to extend from " << region_end << endl;
-
                trackview.session()->begin_reversible_command (_("paste"));
 
-                _region->clear_history ();
+                _region->clear_changes ();
                _region->set_length (end_frame, this);
                trackview.session()->add_command (new StatefulDiffCommand (_region));
        }
 
-        cerr << "region end finally at " << _region->position() + _region->length() - 1;
-       apply_delta ();
+       apply_diff ();
 }
 
 struct EventNoteTimeEarlyFirstComparator {
@@ -2615,7 +3038,7 @@ MidiRegionView::time_sort_events ()
 void
 MidiRegionView::goto_next_note ()
 {
-       // nframes64_t pos = -1;
+       // framepos_t pos = -1;
        bool use_next = false;
 
        if (_events.back()->selected()) {
@@ -2644,7 +3067,7 @@ MidiRegionView::goto_next_note ()
 void
 MidiRegionView::goto_previous_note ()
 {
-       // nframes64_t pos = -1;
+       // framepos_t pos = -1;
        bool use_next = false;
 
        if (_events.front()->selected()) {
@@ -2689,3 +3112,297 @@ MidiRegionView::selection_as_notelist (Notes& selected, bool allow_all_if_none_s
                }
        }
 }
+
+void
+MidiRegionView::update_ghost_note (double x, double y)
+{
+       _last_ghost_x = x;
+       _last_ghost_y = y;
+       
+       _note_group->w2i (x, y);
+       framepos_t f = trackview.editor().pixel_to_frame (x) + _region->position ();
+       trackview.editor().snap_to (f);
+       f -= _region->position ();
+
+       bool success;
+       Evoral::MusicalTime beats = trackview.editor().get_grid_type_as_beats (success, f);
+
+       if (!success) {
+               beats = 1;
+       }
+       
+       double length = frames_to_beats (snap_frame_to_frame (f + beats_to_frames (beats)) - f);
+       
+       _ghost_note->note()->set_time (frames_to_beats (f + _region->start()));
+       _ghost_note->note()->set_length (length);
+       _ghost_note->note()->set_note (midi_stream_view()->y_to_note (y));
+
+       update_note (_ghost_note);
+
+       show_verbose_canvas_cursor (_ghost_note->note ());
+}
+
+void
+MidiRegionView::create_ghost_note (double x, double y)
+{
+       delete _ghost_note;
+       _ghost_note = 0;
+
+       boost::shared_ptr<NoteType> g (new NoteType);
+       _ghost_note = new NoEventCanvasNote (*this, *_note_group, g);
+       update_ghost_note (x, y);
+       _ghost_note->show ();
+
+       _last_ghost_x = x;
+       _last_ghost_y = y;
+
+       show_verbose_canvas_cursor (_ghost_note->note ());
+}
+
+void
+MidiRegionView::snap_changed ()
+{
+       if (!_ghost_note) {
+               return;
+       }
+       
+       create_ghost_note (_last_ghost_x, _last_ghost_y);
+}
+
+void
+MidiRegionView::show_verbose_canvas_cursor (boost::shared_ptr<NoteType> n) const
+{
+       char buf[24];
+       snprintf (buf, sizeof (buf), "%s (%d)\nVel %d", 
+                  Evoral::midi_note_name (n->note()).c_str(), 
+                  (int) n->note (),
+                  (int) n->velocity());
+       trackview.editor().show_verbose_canvas_cursor_with (buf, 10, 20);
+}
+
+void
+MidiRegionView::drop_down_keys ()
+{
+        _mouse_state = None;
+}
+
+void
+MidiRegionView::maybe_select_by_position (GdkEventButton* ev, double /*x*/, double y)
+{
+       double note = midi_stream_view()->y_to_note(y);
+        Events e;
+       MidiTimeAxisView* const mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
+
+       uint16_t chn_mask = mtv->channel_selector().get_selected_channels();
+
+        if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
+                get_events (e, Evoral::Sequence<Evoral::MusicalTime>::PitchGreaterThanOrEqual, (uint8_t) floor (note), chn_mask);
+        } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
+                get_events (e, Evoral::Sequence<Evoral::MusicalTime>::PitchLessThanOrEqual, (uint8_t) floor (note), chn_mask);
+        } else {
+                return;
+        }
+
+       bool add_mrv_selection = false;
+
+       if (_selection.empty()) {
+               add_mrv_selection = true;
+       }
+
+        for (Events::iterator i = e.begin(); i != e.end(); ++i) {
+                if (_selection.insert (*i).second) {
+                        (*i)->set_selected (true);
+                }
+       }
+
+       if (add_mrv_selection) {
+               PublicEditor& editor (trackview.editor());
+               editor.get_selection().add (this);
+       }
+}                
+
+void
+MidiRegionView::color_handler ()
+{
+        RegionView::color_handler ();
+
+       for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
+                (*i)->set_selected ((*i)->selected()); // will change color
+        }
+
+        /* XXX probably more to do here */
+}
+
+void
+MidiRegionView::enable_display (bool yn)
+{
+       RegionView::enable_display (yn);
+       if (yn) {
+               redisplay_model ();
+       }
+}
+
+void
+MidiRegionView::show_step_edit_cursor (Evoral::MusicalTime pos)
+{
+        if (_step_edit_cursor == 0) {
+                ArdourCanvas::Group* const group = (ArdourCanvas::Group*)get_canvas_group();
+
+                _step_edit_cursor = new ArdourCanvas::SimpleRect (*group);
+                _step_edit_cursor->property_y1() = 0;
+                _step_edit_cursor->property_y2() = midi_stream_view()->contents_height();
+                _step_edit_cursor->property_fill_color_rgba() = RGBA_TO_UINT (45,0,0,90);
+                _step_edit_cursor->property_outline_color_rgba() = RGBA_TO_UINT (85,0,0,90);
+        }
+
+        move_step_edit_cursor (pos);
+        _step_edit_cursor->show ();
+}
+
+void
+MidiRegionView::move_step_edit_cursor (Evoral::MusicalTime pos)
+{
+        _step_edit_cursor_position = pos;
+
+        if (_step_edit_cursor) {
+                double pixel = trackview.editor().frame_to_pixel (beats_to_frames (pos));
+                _step_edit_cursor->property_x1() = pixel;
+                set_step_edit_cursor_width (_step_edit_cursor_width);
+        }
+}
+
+void
+MidiRegionView::hide_step_edit_cursor ()
+{
+        if (_step_edit_cursor) {
+                _step_edit_cursor->hide ();
+        }
+}
+
+void
+MidiRegionView::set_step_edit_cursor_width (Evoral::MusicalTime beats)
+{
+        _step_edit_cursor_width = beats;
+
+        if (_step_edit_cursor) {
+                _step_edit_cursor->property_x2() = _step_edit_cursor->property_x1() + trackview.editor().frame_to_pixel (beats_to_frames (beats));
+        }
+}
+
+/** Called when a diskstream on our track has received some data.  Update the view, if applicable.
+ *  @param buf Data that has been recorded.
+ *  @param w Source that this data will end up in.
+ */
+void
+MidiRegionView::data_recorded (boost::shared_ptr<MidiBuffer> buf, boost::weak_ptr<MidiSource> w)
+{
+       if (!_active_notes) {
+               /* we aren't actively being recorded to */
+               return;
+       }
+       
+       boost::shared_ptr<MidiSource> src = w.lock ();
+       if (!src || src != midi_region()->midi_source()) {
+               /* recorded data was not destined for our source */
+               return;
+       }
+
+       MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*> (&trackview);
+       BeatsFramesConverter converter (trackview.session()->tempo_map(), mtv->midi_track()->get_capture_start_frame (0));
+
+       framepos_t back = max_framepos;
+       
+       for (MidiBuffer::iterator i = buf->begin(); i != buf->end(); ++i) {
+               Evoral::MIDIEvent<MidiBuffer::TimeType> const ev (*i, false);
+               assert (ev.buffer ());
+
+               Evoral::MusicalTime const time_beats = converter.from (ev.time () - converter.origin_b ());
+
+               if (ev.type() == MIDI_CMD_NOTE_ON) {
+
+                       boost::shared_ptr<Evoral::Note<Evoral::MusicalTime> > note (
+                               new Evoral::Note<Evoral::MusicalTime> (ev.channel(), time_beats, 0, ev.note(), ev.velocity())
+                               );
+
+                       add_note (note, true);
+
+                       /* fix up our note range */
+                       if (ev.note() < _current_range_min) {
+                               midi_stream_view()->apply_note_range (ev.note(), _current_range_max, true);
+                       } else if (ev.note() > _current_range_max) {
+                               midi_stream_view()->apply_note_range (_current_range_min, ev.note(), true);
+                       }
+                       
+               } else if (ev.type() == MIDI_CMD_NOTE_OFF) {
+                       resolve_note (ev.note (), time_beats);
+               }
+
+               back = ev.time ();
+       }
+
+       midi_stream_view()->check_record_layers (region(), back);
+}
+
+void
+MidiRegionView::trim_front_starting ()
+{
+       /* Reparent the note group to the region view's parent, so that it doesn't change
+          when the region view is trimmed.
+       */
+       _temporary_note_group = new ArdourCanvas::Group (*group->property_parent ());
+       _temporary_note_group->move (group->property_x(), group->property_y());
+       _note_group->reparent (*_temporary_note_group);
+}
+
+void
+MidiRegionView::trim_front_ending ()
+{
+       _note_group->reparent (*group);
+       delete _temporary_note_group;
+       _temporary_note_group = 0;
+
+       if (_region->start() < 0) {
+               /* Trim drag made start time -ve; fix this */
+               midi_region()->fix_negative_start ();
+       }
+}
+
+/** @return channel (counted from 0) to add an event to, based on the current setting
+ *  of the channel selector.
+ */
+uint8_t
+MidiRegionView::get_channel_for_add () const
+{
+       MidiTimeAxisView* const mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
+       uint16_t const chn_mask = mtv->channel_selector().get_selected_channels();
+       int chn_cnt = 0;
+       uint8_t channel = 0;
+
+       /* pick the highest selected channel, unless all channels are selected,
+          which is interpreted to mean channel 1 (zero)
+       */
+
+        for (uint16_t i = 0; i < 16; ++i) {
+                if (chn_mask & (1<<i)) {
+                        channel = i;
+                        chn_cnt++;
+                }
+        }
+
+        if (chn_cnt == 16) {
+                channel = 0;
+        }
+
+       return channel;
+}
+
+void
+MidiRegionView::edit_patch_change (ArdourCanvas::CanvasPatchChange* pc)
+{
+       PatchChangeDialog d (&_time_converter, trackview.session(), *pc->patch (), Gtk::Stock::APPLY);
+       if (d.run () != Gtk::RESPONSE_ACCEPT) {
+               return;
+       }
+
+       change_patch_change (pc->patch(), d.patch ());
+}