HIG-ify the locations UI a bit. Should fix #3526.
[ardour.git] / gtk2_ardour / editor_mouse.cc
index cecddd092a5c0a3cde51b451930b292d9af21395..f2d49fa1d711ce812f303b97bb75a697b2174777 100644 (file)
 #include <gtkmm2ext/tearoff.h>
 #include "pbd/memento_command.h"
 #include "pbd/basename.h"
+#include "pbd/stateful_diff_command.h"
 
 #include "ardour_ui.h"
 #include "actions.h"
+#include "canvas-note.h"
 #include "editor.h"
 #include "time_axis_view.h"
 #include "audio_time_axis.h"
@@ -52,6 +54,8 @@
 #include "rgb_macros.h"
 #include "control_point_dialog.h"
 #include "editor_drag.h"
+#include "automation_region_view.h"
+#include "edit_note_dialog.h"
 
 #include "ardour/types.h"
 #include "ardour/profile.h"
@@ -81,7 +85,7 @@ using namespace Editing;
 using Gtkmm2ext::Keyboard;
 
 bool
-Editor::mouse_frame (nframes64_t& where, bool& in_track_canvas) const
+Editor::mouse_frame (framepos_t& where, bool& in_track_canvas) const
 {
        int x, y;
        double wx, wy;
@@ -114,7 +118,7 @@ Editor::mouse_frame (nframes64_t& where, bool& in_track_canvas) const
        return true;
 }
 
-nframes64_t
+framepos_t
 Editor::event_frame (GdkEvent const * event, double* pcx, double* pcy) const
 {
        double cx, cy;
@@ -134,13 +138,11 @@ Editor::event_frame (GdkEvent const * event, double* pcx, double* pcy) const
        case GDK_BUTTON_PRESS:
        case GDK_2BUTTON_PRESS:
        case GDK_3BUTTON_PRESS:
-
                *pcx = event->button.x;
                *pcy = event->button.y;
                _trackview_group->w2i(*pcx, *pcy);
                break;
        case GDK_MOTION_NOTIFY:
-
                *pcx = event->motion.x;
                *pcy = event->motion.y;
                _trackview_group->w2i(*pcx, *pcy);
@@ -178,7 +180,7 @@ Editor::which_grabber_cursor ()
                        break;
 
                case MouseObject:
-                       c = grabber_cursor;
+                       c = grabber_note_cursor;
                        break;
 
                case MouseTimeFX:
@@ -196,6 +198,10 @@ Editor::which_grabber_cursor ()
                        c = grabber_edit_point_cursor;
                        break;
                default:
+                        boost::shared_ptr<Movable> m = _movable.lock();
+                        if (m && m->locked()) {
+                                c = speaker_cursor;
+                        } 
                        break;
                }
        }
@@ -203,6 +209,29 @@ Editor::which_grabber_cursor ()
        return c;
 }
 
+void
+Editor::set_current_trimmable (boost::shared_ptr<Trimmable> t)
+{
+        boost::shared_ptr<Trimmable> st = _trimmable.lock();
+
+        if (!st || st == t) {
+                _trimmable = t;
+                set_canvas_cursor ();
+        } 
+        
+}
+
+void
+Editor::set_current_movable (boost::shared_ptr<Movable> m)
+{
+        boost::shared_ptr<Movable> sm = _movable.lock();
+
+        if (!sm || sm != m) {
+                _movable = m;
+                set_canvas_cursor ();
+        }
+}
+
 void
 Editor::set_canvas_cursor ()
 {
@@ -241,7 +270,11 @@ Editor::set_canvas_cursor ()
                        break;
 
                case MouseZoom:
-                       current_canvas_cursor = zoom_cursor;
+                       if (Keyboard::the_keyboard().key_is_down (GDK_Control_L)) {
+                               current_canvas_cursor = zoom_out_cursor;
+                       } else {
+                               current_canvas_cursor = zoom_in_cursor;
+                       }
                        break;
 
                case MouseTimeFX:
@@ -254,15 +287,34 @@ Editor::set_canvas_cursor ()
                }
        }
 
-       if (is_drawable()) {
-               track_canvas->get_window()->set_cursor(*current_canvas_cursor);
+       switch (_join_object_range_state) {
+       case JOIN_OBJECT_RANGE_NONE:
+               break;
+       case JOIN_OBJECT_RANGE_OBJECT:
+               current_canvas_cursor = which_grabber_cursor ();
+               break;
+       case JOIN_OBJECT_RANGE_RANGE:
+               current_canvas_cursor = selector_cursor;
+               break;
+       }
+
+       /* up-down cursor as a cue that automation can be dragged up and down when in join object/range mode */
+       if (join_object_range_button.get_active() && last_item_entered) {
+               if (last_item_entered->property_parent() && (*last_item_entered->property_parent()).get_data (X_("timeselection"))) {
+                       pair<TimeAxisView*, int> tvp = trackview_by_y_position (_last_motion_y + vertical_adjustment.get_value() - canvas_timebars_vsize);
+                       if (dynamic_cast<AutomationTimeAxisView*> (tvp.first)) {
+                               current_canvas_cursor = up_down_cursor;
+                       }
+               }
        }
+
+        set_canvas_cursor (current_canvas_cursor, true);
 }
 
 void
 Editor::set_mouse_mode (MouseMode m, bool force)
 {
-       if (_drag) {
+       if (_drags->active ()) {
                return;
        }
 
@@ -314,30 +366,32 @@ Editor::mouse_mode_toggled (MouseMode m)
        mouse_mode = m;
 
        instant_save ();
-
-       if (mouse_mode != MouseRange) {
-
-               /* in all modes except range, hide the range selection,
-                  show the object (region) selection.
-               */
-
-               for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-                       (*i)->set_should_show_selection (true);
-               }
-               for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-                       (*i)->hide_selection ();
-               }
-
-       } else {
-
-               /*
-                  in range mode, show the range selection.
-               */
-
-               for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
-                       (*i)->show_selection (selection->time);
-               }
-       }
+        
+        if (!internal_editing()) {
+                if (mouse_mode != MouseRange && _join_object_range_state == JOIN_OBJECT_RANGE_NONE) {
+                        
+                        /* in all modes except range and joined object/range, hide the range selection,
+                           show the object (region) selection.
+                        */
+                        
+                        for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+                                (*i)->set_should_show_selection (true);
+                        }
+                        for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
+                                (*i)->hide_selection ();
+                        }
+                        
+                } else {
+                        
+                        /*
+                          in range or object/range mode, show the range selection.
+                        */
+                        
+                        for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
+                                (*i)->show_selection (selection->time);
+                        }
+                }
+        }
 
        set_canvas_cursor ();
 }
@@ -413,15 +467,20 @@ Editor::button_selection (ArdourCanvas::Item* /*item*/, GdkEvent* event, ItemTyp
           region alignment.
 
           note: not dbl-click or triple-click
+
+          Also note that there is no region selection in internal edit mode, otherwise
+          for operations operating on the selection (e.g. cut) it is not obvious whether
+          to cut notes or regions.
        */
 
        if (((mouse_mode != MouseObject) &&
+            (_join_object_range_state != JOIN_OBJECT_RANGE_OBJECT) &&
             (mouse_mode != MouseAudition || item_type != RegionItem) &&
             (mouse_mode != MouseTimeFX || item_type != RegionItem) &&
             (mouse_mode != MouseGain) &&
             (mouse_mode != MouseRange)) ||
-
-           ((event->type != GDK_BUTTON_PRESS && event->type != GDK_BUTTON_RELEASE) || event->button.button > 3)) {
+           ((event->type != GDK_BUTTON_PRESS && event->type != GDK_BUTTON_RELEASE) || event->button.button > 3) ||
+           internal_editing()) {
 
                return;
        }
@@ -445,19 +504,25 @@ Editor::button_selection (ArdourCanvas::Item* /*item*/, GdkEvent* event, ItemTyp
 
        switch (item_type) {
        case RegionItem:
-               if (mouse_mode != MouseRange) {
+               if (mouse_mode != MouseRange || _join_object_range_state == JOIN_OBJECT_RANGE_OBJECT) {
                        set_selected_regionview_from_click (press, op, true);
                } else if (event->type == GDK_BUTTON_PRESS) {
-                       set_selected_track_as_side_effect ();
+                       selection->clear_tracks ();
+                       set_selected_track_as_side_effect (op, true);
+               }
+               if (_join_object_range_state == JOIN_OBJECT_RANGE_OBJECT && !selection->regions.empty()) {
+                       clicked_selection = select_range_around_region (selection->regions.front());
                }
                break;
 
        case RegionViewNameHighlight:
        case RegionViewName:
-               if (mouse_mode != MouseRange) {
+        case LeftFrameHandle:
+        case RightFrameHandle:
+               if (mouse_mode != MouseRange || _join_object_range_state == JOIN_OBJECT_RANGE_OBJECT) {
                        set_selected_regionview_from_click (press, op, true);
                } else if (event->type == GDK_BUTTON_PRESS) {
-                       set_selected_track_as_side_effect ();
+                       set_selected_track_as_side_effect (op);
                }
                break;
 
@@ -466,16 +531,16 @@ Editor::button_selection (ArdourCanvas::Item* /*item*/, GdkEvent* event, ItemTyp
        case FadeInItem:
        case FadeOutHandleItem:
        case FadeOutItem:
-               if (mouse_mode != MouseRange) {
+               if (mouse_mode != MouseRange || _join_object_range_state == JOIN_OBJECT_RANGE_OBJECT) {
                        set_selected_regionview_from_click (press, op, true);
                } else if (event->type == GDK_BUTTON_PRESS) {
-                       set_selected_track_as_side_effect ();
+                       set_selected_track_as_side_effect (op);
                }
                break;
 
        case ControlPointItem:
-               set_selected_track_as_side_effect ();
-               if (mouse_mode != MouseRange) {
+               set_selected_track_as_side_effect (op, true);
+               if (mouse_mode != MouseRange || _join_object_range_state == JOIN_OBJECT_RANGE_OBJECT) {
                        set_selected_control_point_from_click (op, false);
                }
                break;
@@ -483,12 +548,13 @@ Editor::button_selection (ArdourCanvas::Item* /*item*/, GdkEvent* event, ItemTyp
        case StreamItem:
                /* for context click, select track */
                if (event->button.button == 3) {
-                       set_selected_track_as_side_effect ();
+                       selection->clear_tracks ();
+                       set_selected_track_as_side_effect (op, true);
                }
                break;
 
        case AutomationTrackItem:
-               set_selected_track_as_side_effect (true);
+               set_selected_track_as_side_effect (op, true);
                break;
 
        default:
@@ -499,12 +565,6 @@ Editor::button_selection (ArdourCanvas::Item* /*item*/, GdkEvent* event, ItemTyp
 bool
 Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
 {
-       if (_drag) {
-               _drag->item()->ungrab (event->button.time);
-               delete _drag;
-               _drag = 0;
-       }
-
        /* single mouse clicks on any of these item types operate
           independent of mouse mode, mostly because they are
           not on the main track canvas or because we want
@@ -513,83 +573,73 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 
        switch (item_type) {
        case PlayheadCursorItem:
-               assert (_drag == 0);
-               _drag = new CursorDrag (this, item, true);
-               _drag->start_grab (event);
+               _drags->set (new CursorDrag (this, item, true), event);
                return true;
 
        case MarkerItem:
                if (Keyboard::modifier_state_equals (event->button.state, Keyboard::ModifierMask(Keyboard::PrimaryModifier|Keyboard::TertiaryModifier))) {
                        hide_marker (item, event);
                } else {
-                       assert (_drag == 0);
-                       _drag = new MarkerDrag (this, item);
-                       _drag->start_grab (event);
+                       _drags->set (new MarkerDrag (this, item), event);
                }
                return true;
 
        case TempoMarkerItem:
-               assert (_drag == 0);
-               _drag = new TempoMarkerDrag (
-                       this,
-                       item,
-                       Keyboard::modifier_state_contains (event->button.state, Keyboard::CopyModifier)
+               _drags->set (
+                       new TempoMarkerDrag (
+                               this,
+                               item,
+                               Keyboard::modifier_state_contains (event->button.state, Keyboard::CopyModifier)
+                               ),
+                       event
                        );
-               _drag->start_grab (event);
                return true;
 
        case MeterMarkerItem:
-               assert (_drag == 0);
-               _drag = new MeterMarkerDrag (
-                       this,
-                       item,
-                       Keyboard::modifier_state_contains (event->button.state, Keyboard::CopyModifier)
+               _drags->set (
+                       new MeterMarkerDrag (
+                               this,
+                               item,
+                               Keyboard::modifier_state_contains (event->button.state, Keyboard::CopyModifier)
+                               ),
+                       event
                        );
-               _drag->start_grab (event);
                return true;
 
        case MarkerBarItem:
        case TempoBarItem:
        case MeterBarItem:
                if (!Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
-                       assert (_drag == 0);
-                       _drag = new CursorDrag (this, &playhead_cursor->canvas_item, false);
-                       _drag->start_grab (event);
+                       _drags->set (new CursorDrag (this, &playhead_cursor->canvas_item, false), event);
                }
                return true;
                break;
 
 
        case RangeMarkerBarItem:
-               assert (_drag == 0);
                if (!Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
-                       _drag = new CursorDrag (this, &playhead_cursor->canvas_item, false);
+                       _drags->set (new CursorDrag (this, &playhead_cursor->canvas_item, false), event);
                } else {
-                       _drag = new RangeMarkerBarDrag (this, item, RangeMarkerBarDrag::CreateRangeMarker);
+                       _drags->set (new RangeMarkerBarDrag (this, item, RangeMarkerBarDrag::CreateRangeMarker), event);
                }
-               _drag->start_grab (event);
                return true;
                break;
 
        case CdMarkerBarItem:
-               assert (_drag == 0);
                if (!Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
-                       _drag = new CursorDrag (this, &playhead_cursor->canvas_item, false);
+                       _drags->set (new CursorDrag (this, &playhead_cursor->canvas_item, false), event);
                } else {
-                       _drag = new RangeMarkerBarDrag (this, item, RangeMarkerBarDrag::CreateCDMarker);
+                       _drags->set (new RangeMarkerBarDrag (this, item, RangeMarkerBarDrag::CreateCDMarker), event);
                }
-               _drag->start_grab (event);
                return true;
                break;
 
        case TransportMarkerBarItem:
-               assert (_drag == 0);
                if (!Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
-                       _drag = new CursorDrag (this, &playhead_cursor->canvas_item, false);
+                       _drags->set (new CursorDrag (this, &playhead_cursor->canvas_item, false), event);
                } else {
-                       _drag = new RangeMarkerBarDrag (this, item, RangeMarkerBarDrag::CreateTransportMarker);
+                       _drags->set (new RangeMarkerBarDrag (this, item, RangeMarkerBarDrag::CreateTransportMarker), event);
                }
-               _drag->start_grab (event);
                return true;
                break;
 
@@ -597,44 +647,102 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                break;
        }
 
-       switch (mouse_mode) {
+       if (_join_object_range_state == JOIN_OBJECT_RANGE_OBJECT) {
+               /* special case: allow trim of range selections in joined object mode;
+                  in theory eff should equal MouseRange in this case, but it doesn't
+                  because entering the range selection canvas item results in entered_regionview
+                  being set to 0, so update_join_object_range_location acts as if we aren't
+                  over a region.
+               */
+               if (item_type == StartSelectionTrimItem) {
+                       _drags->set (new SelectionDrag (this, item, SelectionDrag::SelectionStartTrim), event);
+               } else if (item_type == EndSelectionTrimItem) {
+                       _drags->set (new SelectionDrag (this, item, SelectionDrag::SelectionEndTrim), event);
+               }
+       }
+
+       Editing::MouseMode eff = effective_mouse_mode ();
+
+       /* special case: allow drag of region fade in/out in object mode with join object/range enabled */
+       if (item_type == FadeInHandleItem || item_type == FadeOutHandleItem) {
+               eff = MouseObject;
+       }
+
+       switch (eff) {
        case MouseRange:
                switch (item_type) {
                case StartSelectionTrimItem:
-                       assert (_drag == 0);
-                       _drag = new SelectionDrag (this, item, SelectionDrag::SelectionStartTrim);
-                       _drag->start_grab (event);
+                       _drags->set (new SelectionDrag (this, item, SelectionDrag::SelectionStartTrim), event);
                        break;
 
                case EndSelectionTrimItem:
-                       assert (_drag == 0);
-                       _drag = new SelectionDrag (this, item, SelectionDrag::SelectionEndTrim);
-                       _drag->start_grab (event);
+                       _drags->set (new SelectionDrag (this, item, SelectionDrag::SelectionEndTrim), event);
                        break;
 
                case SelectionItem:
                        if (Keyboard::modifier_state_contains
-                           (event->button.state, Keyboard::ModifierMask(Keyboard::SecondaryModifier))) {
+                           (event->button.state, Keyboard::ModifierMask(Keyboard::PrimaryModifier))) {
                                // contains and not equals because I can't use alt as a modifier alone.
                                start_selection_grab (item, event);
-                       } else if (Keyboard::modifier_state_equals (event->button.state, Keyboard::PrimaryModifier)) {
+                       } else if (Keyboard::modifier_state_equals (event->button.state, Keyboard::SecondaryModifier)) {
                                /* grab selection for moving */
-                               assert (_drag == 0);
-                               _drag = new SelectionDrag (this, item, SelectionDrag::SelectionMove);
-                               _drag->start_grab (event);
+                               _drags->set (new SelectionDrag (this, item, SelectionDrag::SelectionMove), event);
                        } else {
-                               /* this was debated, but decided the more common action was to
-                                  make a new selection */
-                               assert (_drag == 0);
-                               _drag = new SelectionDrag (this, item, SelectionDrag::CreateSelection);
-                               _drag->start_grab (event);
+                               double const y = event->button.y + vertical_adjustment.get_value() - canvas_timebars_vsize;
+                               pair<TimeAxisView*, int> tvp = trackview_by_y_position (y);
+                               if (tvp.first) {
+                                       AutomationTimeAxisView* atv = dynamic_cast<AutomationTimeAxisView*> (tvp.first);
+                                       if (join_object_range_button.get_active() && atv) {
+                                               /* smart "join" mode: drag automation */
+                                               _drags->set (new AutomationRangeDrag (this, atv->base_item(), selection->time), event, up_down_cursor);
+                                       } else {
+                                               /* this was debated, but decided the more common action was to
+                                                  make a new selection */
+                                               _drags->set (new SelectionDrag (this, item, SelectionDrag::CreateSelection), event);
+                                       }
+                               }
                        }
                        break;
 
+                case NoteItem:
+                        if (internal_editing()) {
+                                /* trim notes if we're in internal edit mode and near the ends of the note */
+                                ArdourCanvas::CanvasNote* cn = dynamic_cast<ArdourCanvas::CanvasNote*> (item);
+                                cerr << "NoteItem button press, cursor = " << current_canvas_cursor << endl;
+                                if (cn->mouse_near_ends()) {
+                                        _drags->set (new NoteResizeDrag (this, item), event, current_canvas_cursor);
+                                } else {
+                                        _drags->set (new NoteDrag (this, item), event);
+                                }
+                        }
+                       return true;
+
+                case StreamItem:
+                        if (internal_editing()) {
+                               if (dynamic_cast<MidiTimeAxisView*> (clicked_axisview)) {
+                                       _drags->set (new RegionCreateDrag (this, item, clicked_axisview), event);
+                                       return true;
+                               }
+                        } else {
+                               _drags->set (new SelectionDrag (this, item, SelectionDrag::CreateSelection), event);
+                               return true;
+                       }
+                        break;
+
+                case RegionViewNameHighlight:
+                case LeftFrameHandle:
+                case RightFrameHandle:
+                        if (!clicked_regionview->region()->locked()) {
+                                RegionSelection s = get_equivalent_regions (selection->regions, Properties::edit.property_id);
+                                _drags->set (new TrimDrag (this, item, clicked_regionview, s.by_layer()), event);
+                                return true;
+                        }
+                        break;
+
                default:
-                       assert (_drag == 0);
-                       _drag = new SelectionDrag (this, item, SelectionDrag::CreateSelection);
-                       _drag->start_grab (event);
+                        if (!internal_editing()) {
+                                _drags->set (new SelectionDrag (this, item, SelectionDrag::CreateSelection), event);
+                        }
                }
                return true;
                break;
@@ -643,10 +751,12 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                switch (item_type) {
                case NoteItem:
                        if (internal_editing()) {
-                               /* Note: we don't get here if not in internal_editing() mode */
-                               assert (_drag == 0);
-                               _drag = new NoteDrag (this, item);
-                               _drag->start_grab (event);
+                                ArdourCanvas::CanvasNote* cn = dynamic_cast<ArdourCanvas::CanvasNote*> (item);
+                                if (cn->mouse_near_ends()) {
+                                        _drags->set (new NoteResizeDrag (this, item), event, current_canvas_cursor);
+                                } else {
+                                        _drags->set (new NoteDrag (this, item), event);
+                                }
                                return true;
                        }
                        break;
@@ -658,89 +768,152 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                if (Keyboard::modifier_state_contains (event->button.state, Keyboard::ModifierMask(Keyboard::PrimaryModifier|Keyboard::SecondaryModifier)) &&
                    event->type == GDK_BUTTON_PRESS) {
 
-                       assert (_drag == 0);
-                       _drag = new RubberbandSelectDrag (this, item);
-                       _drag->start_grab (event);
+                       _drags->set (new RubberbandSelectDrag (this, item), event);
 
                } else if (event->type == GDK_BUTTON_PRESS) {
 
                        switch (item_type) {
                        case FadeInHandleItem:
                        {
-                               assert (_drag == 0);
-                               RegionSelection s = get_equivalent_regions (selection->regions, RouteGroup::Edit);
-                               _drag = new FadeInDrag (this, item, reinterpret_cast<RegionView*> (item->get_data("regionview")), s);
-                               _drag->start_grab (event);
+                               RegionSelection s = get_equivalent_regions (selection->regions, Properties::edit.property_id);
+                               _drags->set (new FadeInDrag (this, item, reinterpret_cast<RegionView*> (item->get_data("regionview")), s), event);
                                return true;
                        }
 
                        case FadeOutHandleItem:
                        {
-                               assert (_drag == 0);
-                               RegionSelection s = get_equivalent_regions (selection->regions, RouteGroup::Edit);
-                               _drag = new FadeOutDrag (this, item, reinterpret_cast<RegionView*> (item->get_data("regionview")), s);
-                               _drag->start_grab (event);
+                               RegionSelection s = get_equivalent_regions (selection->regions, Properties::edit.property_id);
+                               _drags->set (new FadeOutDrag (this, item, reinterpret_cast<RegionView*> (item->get_data("regionview")), s), event);
+                               return true;
+                       }
+
+                       case FeatureLineItem:
+                       {                       
+                               if (Keyboard::modifier_state_contains (event->button.state, Keyboard::TertiaryModifier)) {
+                                       remove_transient(item);
+                                       return true;
+                               }
+                               
+                               _drags->set (new FeatureLineDrag (this, item), event);
                                return true;
+                               break;
                        }
 
                        case RegionItem:
+                               if (dynamic_cast<AutomationRegionView*> (clicked_regionview)) {
+                                       /* click on an automation region view; do nothing here and let the ARV's signal handler
+                                          sort it out.
+                                       */
+                                       break;
+                               }
+
+                               if (internal_editing ()) {
+                                       /* no region drags in internal edit mode */
+                                       break;
+                               }
+                               
+                               /* click on a normal region view */
                                if (Keyboard::modifier_state_contains (event->button.state, Keyboard::CopyModifier)) {
-                                       start_region_copy_grab (item, event, clicked_regionview);
-                               } else if (Keyboard::the_keyboard().key_is_down (GDK_b)) {
-                                       start_region_brush_grab (item, event, clicked_regionview);
+                                       add_region_copy_drag (item, event, clicked_regionview);
+                               } 
+                               else if (Keyboard::the_keyboard().key_is_down (GDK_b)) {
+                                       add_region_brush_drag (item, event, clicked_regionview);
                                } else {
-                                       start_region_grab (item, event, clicked_regionview);
+                                       add_region_drag (item, event, clicked_regionview);
                                }
+                               
+                               if (_join_object_range_state == JOIN_OBJECT_RANGE_OBJECT && !selection->regions.empty()) {
+                                       _drags->add (new SelectionDrag (this, clicked_axisview->get_selection_rect (clicked_selection)->rect, SelectionDrag::SelectionMove));
+                               }
+
+                               _drags->start_grab (event);
                                break;
 
                        case RegionViewNameHighlight:
-                       {
-                               assert (_drag == 0);
-                               RegionSelection s = get_equivalent_regions (selection->regions, RouteGroup::Edit);
-                               _drag = new TrimDrag (this, item, clicked_regionview, s.by_layer());
-                               _drag->start_grab (event);
-                               return true;
+                       case LeftFrameHandle:
+                        case RightFrameHandle:
+                               if (!internal_editing () && !clicked_regionview->region()->locked()) {
+                                       RegionSelection s = get_equivalent_regions (selection->regions, Properties::edit.property_id);
+                                       _drags->set (new TrimDrag (this, item, clicked_regionview, s.by_layer()), event);
+                                       return true;
+                               }
                                break;
-                       }
 
                        case RegionViewName:
                        {
                                /* rename happens on edit clicks */
-                               assert (_drag == 0);
-                               RegionSelection s = get_equivalent_regions (selection->regions, RouteGroup::Edit);
-                               _drag = new TrimDrag (this, clicked_regionview->get_name_highlight(), clicked_regionview, s.by_layer());
-                               _drag->start_grab (event);
+                               RegionSelection s = get_equivalent_regions (selection->regions, Properties::edit.property_id);
+                               _drags->set (new TrimDrag (this, clicked_regionview->get_name_highlight(), clicked_regionview, s.by_layer()), event);
                                return true;
                                break;
                        }
 
                        case ControlPointItem:
-                               assert (_drag == 0);
-                               _drag = new ControlPointDrag (this, item);
-                               _drag->start_grab (event);
+                               _drags->set (new ControlPointDrag (this, item), event);
                                return true;
                                break;
 
                        case AutomationLineItem:
-                               assert (_drag == 0);
-                               _drag = new LineDrag (this, item);
-                               _drag->start_grab (event);
+                               _drags->set (new LineDrag (this, item), event);
                                return true;
                                break;
 
                        case StreamItem:
                                if (internal_editing()) {
-                                       assert (_drag == 0);
-                                       _drag = new RegionCreateDrag (this, item, clicked_axisview);
-                                       _drag->start_grab (event);
+                                       if (dynamic_cast<MidiTimeAxisView*> (clicked_axisview)) {
+                                               _drags->set (new RegionCreateDrag (this, item, clicked_axisview), event);
+                                       }
                                        return true;
+                               } else {
+                                       _drags->set (new RubberbandSelectDrag (this, item), event);
                                }
-                               /* fallthru */
+                               break;
+                               
                        case AutomationTrackItem:
-                               assert (_drag == 0);
-                               _drag = new RubberbandSelectDrag (this, item);
-                               _drag->start_grab (event);
+                               /* rubberband drag to select automation points */
+                               _drags->set (new RubberbandSelectDrag (this, item), event);
+                               break;
+
+                       case SelectionItem:
+                       {
+                               if (join_object_range_button.get_active()) {
+                                       /* we're in "smart" joined mode, and we've clicked on a Selection */
+                                       double const y = event->button.y + vertical_adjustment.get_value() - canvas_timebars_vsize;
+                                       pair<TimeAxisView*, int> tvp = trackview_by_y_position (y);
+                                       if (tvp.first) {
+                                               /* if we're over an automation track, start a drag of its data */
+                                               AutomationTimeAxisView* atv = dynamic_cast<AutomationTimeAxisView*> (tvp.first);
+                                               if (atv) {
+                                                       _drags->set (new AutomationRangeDrag (this, atv->base_item(), selection->time), event, up_down_cursor);
+                                               }
+
+                                               /* if we're over a track and a region, and in the `object' part of a region,
+                                                  put a selection around the region and drag both
+                                               */
+                                               RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
+                                               if (rtv && _join_object_range_state == JOIN_OBJECT_RANGE_OBJECT) {
+                                                       boost::shared_ptr<Track> t = boost::dynamic_pointer_cast<Track> (rtv->route ());
+                                                       if (t) {
+                                                               boost::shared_ptr<Playlist> pl = t->playlist ();
+                                                               if (pl) {
+                                                                       
+                                                                       boost::shared_ptr<Region> r = pl->top_region_at (event_frame (event));
+                                                                       if (r) {
+                                                                               RegionView* rv = rtv->view()->find_view (r);
+                                                                               clicked_selection = select_range_around_region (rv);
+                                                                               _drags->add (new SelectionDrag (this, item, SelectionDrag::SelectionMove));
+                                                                               list<RegionView*> rvs;
+                                                                               rvs.push_back (rv);
+                                                                               _drags->add (new RegionMoveDrag (this, item, rv, rvs, false, false));
+                                                                               _drags->start_grab (event);
+                                                                       }
+                                                               }
+                                                       }
+                                               }
+                                       }
+                               }
                                break;
+                       }
 
 #ifdef WITH_CMT
                        case ImageFrameHandleStartItem:
@@ -784,21 +957,15 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                        /* start a grab so that if we finish after moving
                           we can tell what happened.
                        */
-                       assert (_drag == 0);
-                       _drag = new RegionGainDrag (this, item);
-                       _drag->start_grab (event, current_canvas_cursor);
+                       _drags->set (new RegionGainDrag (this, item), event, current_canvas_cursor);
                        break;
 
                case GainLineItem:
-                       assert (_drag == 0);
-                       _drag = new LineDrag (this, item);
-                       _drag->start_grab (event);
+                       _drags->set (new LineDrag (this, item), event);
                        return true;
 
                case ControlPointItem:
-                       assert (_drag == 0);
-                       _drag = new ControlPointDrag (this, item);
-                       _drag->start_grab (event);
+                       _drags->set (new ControlPointDrag (this, item), event);
                        return true;
                        break;
 
@@ -810,15 +977,11 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 
                switch (item_type) {
                case ControlPointItem:
-                       assert (_drag == 0);
-                       _drag = new ControlPointDrag (this, item);
-                       _drag->start_grab (event);
+                       _drags->set (new ControlPointDrag (this, item), event);
                        break;
 
                case AutomationLineItem:
-                       assert (_drag == 0);
-                       _drag = new LineDrag (this, item);
-                       _drag->start_grab (event);
+                       _drags->set (new LineDrag (this, item), event);
                        break;
 
                case RegionItem:
@@ -835,9 +998,7 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 
        case MouseZoom:
                if (event->type == GDK_BUTTON_PRESS) {
-                       assert (_drag == 0);
-                       _drag = new MouseZoomDrag (this, item);
-                       _drag->start_grab (event);
+                       _drags->set (new MouseZoomDrag (this, item), event);
                }
 
                return true;
@@ -845,26 +1006,23 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 
        case MouseTimeFX:
                if (internal_editing() && item_type == NoteItem) {
-                       assert (_drag == 0);
-                       _drag = new NoteResizeDrag (this, item);
-                       _drag->start_grab (event);
+                       /* drag notes if we're in internal edit mode */
+                       _drags->set (new NoteResizeDrag (this, item), event, current_canvas_cursor);
                        return true;
-               } else if (!internal_editing() && item_type == RegionItem) {
-                       assert (_drag == 0);
-                       _drag = new TimeFXDrag (this, item, clicked_regionview, selection->regions.by_layer());
-                       _drag->start_grab (event);
+               } else if ((!internal_editing() || dynamic_cast<AudioRegionView*> (clicked_regionview)) && clicked_regionview) {
+                       /* do time-FX if we're not in internal edit mode, or we are but we clicked on an audio region */
+                       _drags->set (new TimeFXDrag (this, item, clicked_regionview, selection->regions.by_layer()), event);
                        return true;
                }
                break;
 
        case MouseAudition:
-               _drag = new ScrubDrag (this, item);
-               _drag->start_grab (event);
+               _drags->set (new ScrubDrag (this, item), event);
                scrub_reversals = 0;
                scrub_reverse_distance = 0;
                last_scrub_x = event->button.x;
                scrubbing_direction = 0;
-               track_canvas->get_window()->set_cursor (*transparent_cursor);
+               set_canvas_cursor (transparent_cursor);
                return true;
                break;
 
@@ -878,21 +1036,21 @@ Editor::button_press_handler_1 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 bool
 Editor::button_press_handler_2 (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
 {
-       switch (mouse_mode) {
+       Editing::MouseMode const eff = effective_mouse_mode ();
+       switch (eff) {
        case MouseObject:
                switch (item_type) {
                case RegionItem:
                        if (Keyboard::modifier_state_contains (event->button.state, Keyboard::CopyModifier)) {
-                               start_region_copy_grab (item, event, clicked_regionview);
+                               add_region_copy_drag (item, event, clicked_regionview);
                        } else {
-                               start_region_grab (item, event, clicked_regionview);
+                               add_region_drag (item, event, clicked_regionview);
                        }
+                       _drags->start_grab (event);
                        return true;
                        break;
                case ControlPointItem:
-                       assert (_drag == 0);
-                       _drag = new ControlPointDrag (this, item);
-                       _drag->start_grab (event);
+                       _drags->set (new ControlPointDrag (this, item), event);
                        return true;
                        break;
 
@@ -902,16 +1060,16 @@ Editor::button_press_handler_2 (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 
                switch (item_type) {
                case RegionViewNameHighlight:
-                       assert (_drag == 0);
-                       _drag = new TrimDrag (this, item, clicked_regionview, selection->regions.by_layer());
-                       _drag->start_grab (event);
+                case LeftFrameHandle:
+                case RightFrameHandle:
+                       if (!internal_editing ()) {
+                               _drags->set (new TrimDrag (this, item, clicked_regionview, selection->regions.by_layer()), event);
+                       }
                        return true;
                        break;
 
                case RegionViewName:
-                       assert (_drag == 0);
-                       _drag = new TrimDrag (this, clicked_regionview->get_name_highlight(), clicked_regionview, selection->regions.by_layer());
-                       _drag->start_grab (event);
+                       _drags->set (new TrimDrag (this, clicked_regionview->get_name_highlight(), clicked_regionview, selection->regions.by_layer()), event);
                        return true;
                        break;
 
@@ -962,21 +1120,20 @@ Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemTyp
 
                if (pointer_window == track_canvas->get_bin_window()) {
                        track_canvas->window_to_world (x, y, wx, wy);
-                       allow_vertical_scroll = true;
-               } else {
-                       allow_vertical_scroll = false;
                }
        }
 
+        pre_press_cursor = current_canvas_cursor;
+
        track_canvas->grab_focus();
 
-       if (session && session->actively_recording()) {
+       if (_session && _session->actively_recording()) {
                return true;
        }
 
        button_selection (item, event, item_type);
 
-       if (_drag == 0 &&
+       if (!_drags->active () &&
            (Keyboard::is_delete_event (&event->button) ||
             Keyboard::is_context_menu_event (&event->button) ||
             Keyboard::is_edit_event (&event->button))) {
@@ -1008,22 +1165,25 @@ Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemTyp
 bool
 Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
 {
-       nframes64_t where = event_frame (event, 0, 0);
+       framepos_t where = event_frame (event, 0, 0);
        AutomationTimeAxisView* atv = 0;
 
+        if (pre_press_cursor) {
+                set_canvas_cursor (pre_press_cursor);
+                pre_press_cursor = 0;
+        }
+
        /* no action if we're recording */
 
-       if (session && session->actively_recording()) {
+       if (_session && _session->actively_recording()) {
                return true;
        }
 
-       /* first, see if we're finishing a drag ... */
+       /* see if we're finishing a drag */
 
        bool were_dragging = false;
-       if (_drag) {
-               bool const r = _drag->end_grab (event);
-               delete _drag;
-               _drag = 0;
+       if (_drags->active ()) {
+               bool const r = _drags->end_grab (event);
                if (r) {
                        /* grab dragged, so do nothing else */
                        return true;
@@ -1032,14 +1192,14 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                were_dragging = true;
        }
 
-       button_selection (item, event, item_type);
+        update_region_layering_order_editor ();
 
        /* edit events get handled here */
 
-       if (_drag == 0 && Keyboard::is_edit_event (&event->button)) {
+       if (!_drags->active () && Keyboard::is_edit_event (&event->button)) {
                switch (item_type) {
                case RegionItem:
-                       edit_region ();
+                       show_region_properties ();
                        break;
 
                case TempoMarkerItem:
@@ -1060,6 +1220,10 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                        edit_control_point (item);
                        break;
 
+               case NoteItem:
+                       edit_note (item);
+                       break;
+
                default:
                        break;
                }
@@ -1070,7 +1234,7 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 
        if (Keyboard::is_context_menu_event (&event->button)) {
 
-               if (_drag == 0) {
+               if (!_drags->active ()) {
 
                        /* no matter which button pops up the context menu, tell the menu
                           widget to use button 1 to drive menu selection.
@@ -1090,6 +1254,8 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 
                        case RegionItem:
                        case RegionViewNameHighlight:
+                       case LeftFrameHandle:
+                       case RightFrameHandle:
                        case RegionViewName:
                                popup_track_context_menu (1, event->button.time, item_type, false, where);
                                break;
@@ -1116,11 +1282,11 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                                break;
 
                        case TempoMarkerItem:
-                               tm_marker_context_menu (&event->button, item);
+                               tempo_or_meter_marker_context_menu (&event->button, item);
                                break;
 
                        case MeterMarkerItem:
-                               tm_marker_context_menu (&event->button, item);
+                               tempo_or_meter_marker_context_menu (&event->button, item);
                                break;
 
                        case CrossfadeViewItem:
@@ -1152,7 +1318,9 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 
        /* delete events get handled here */
 
-       if (_drag == 0 && Keyboard::is_delete_event (&event->button)) {
+       Editing::MouseMode const eff = effective_mouse_mode ();
+
+       if (!_drags->active () && Keyboard::is_delete_event (&event->button)) {
 
                switch (item_type) {
                case TempoMarkerItem:
@@ -1168,19 +1336,23 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                        break;
 
                case RegionItem:
-                       if (mouse_mode == MouseObject) {
+                       if (eff == MouseObject) {
                                remove_clicked_region ();
                        }
                        break;
 
                case ControlPointItem:
-                       if (mouse_mode == MouseGain) {
+                       if (eff == MouseGain) {
                                remove_gain_control_point (item, event);
                        } else {
                                remove_control_point (item, event);
                        }
                        break;
 
+               case NoteItem:
+                       remove_midi_note (item, event);
+                       break;
+
                default:
                        break;
                }
@@ -1233,7 +1405,7 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                        break;
                }
 
-               switch (mouse_mode) {
+               switch (eff) {
                case MouseObject:
                        switch (item_type) {
                        case AutomationTrackItem:
@@ -1250,23 +1422,20 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                        break;
 
                case MouseGain:
-                       // Gain only makes sense for audio regions
-
-                       if (!dynamic_cast<AudioRegionView*>(clicked_regionview)) {
-                               break;
-                       }
-
                        switch (item_type) {
                        case RegionItem:
+                       {
                                /* check that we didn't drag before releasing, since
                                   its really annoying to create new control
                                   points when doing this.
                                */
-                               if (were_dragging) {
-                                       dynamic_cast<AudioRegionView*>(clicked_regionview)->add_gain_point_event (item, event);
+                               AudioRegionView* arv = dynamic_cast<AudioRegionView*> (clicked_regionview);
+                               if (were_dragging && arv) {
+                                       arv->add_gain_point_event (item, event);
                                }
                                return true;
                                break;
+                       }
 
                        case AutomationTrackItem:
                                dynamic_cast<AutomationTimeAxisView*>(clicked_axisview)->
@@ -1279,7 +1448,7 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                        break;
 
                case MouseAudition:
-                       track_canvas->get_window()->set_cursor (*current_canvas_cursor);
+                        set_canvas_cursor (current_canvas_cursor);
                        if (scrubbing_direction == 0) {
                                /* no drag, just a click */
                                switch (item_type) {
@@ -1291,7 +1460,7 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                                }
                        } else {
                                /* make sure we stop */
-                               session->request_transport_speed (0.0);
+                               _session->request_transport_speed (0.0);
                        }
                        break;
 
@@ -1305,7 +1474,7 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 
 
        case 2:
-               switch (mouse_mode) {
+               switch (eff) {
 
                case MouseObject:
                        switch (item_type) {
@@ -1348,16 +1517,14 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 }
 
 bool
-Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType item_type)
+Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
 {
        ControlPoint* cp;
        Marker * marker;
        double fraction;
+        bool ret = true;
 
-       if (last_item_entered != item) {
-               last_item_entered = item;
-               last_item_entered_n = 0;
-       }
+       last_item_entered = item;
 
        switch (item_type) {
        case ControlPointItem:
@@ -1368,21 +1535,18 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
                        double at_x, at_y;
                        at_x = cp->get_x();
                        at_y = cp->get_y ();
-                       cp->item()->i2w (at_x, at_y);
+                       cp->i2w (at_x, at_y);
                        at_x += 10.0;
                        at_y += 10.0;
 
                        fraction = 1.0 - (cp->get_y() / cp->line().height());
 
-                       if (is_drawable() && dynamic_cast<ScrubDrag*> (_drag) == 0) {
-                               track_canvas->get_window()->set_cursor (*fader_cursor);
+                       if (is_drawable() && !_drags->active ()) {
+                               set_canvas_cursor (fader_cursor);
                        }
 
-                       last_item_entered_n++;
                        set_verbose_canvas_cursor (cp->line().get_verbose_cursor_string (fraction), at_x, at_y);
-                       if (last_item_entered_n < 10) {
-                               show_verbose_canvas_cursor ();
-                       }
+                       show_verbose_canvas_cursor ();
                }
                break;
 
@@ -1392,7 +1556,7 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
                        if (line)
                                line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_EnteredGainLine.get();
                        if (is_drawable()) {
-                               track_canvas->get_window()->set_cursor (*fader_cursor);
+                               set_canvas_cursor (fader_cursor);
                        }
                }
                break;
@@ -1405,17 +1569,39 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
                                        line->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_EnteredAutomationLine.get();
                        }
                        if (is_drawable()) {
-                               track_canvas->get_window()->set_cursor (*fader_cursor);
+                               set_canvas_cursor (fader_cursor);
                        }
                }
                break;
 
        case RegionViewNameHighlight:
-               if (is_drawable() && mouse_mode == MouseObject) {
-                       track_canvas->get_window()->set_cursor (*trimmer_cursor);
+               if (is_drawable() && mouse_mode == MouseObject && !internal_editing()) {
+                       set_canvas_cursor (trimmer_cursor);
                }
                break;
 
+       case LeftFrameHandle:
+               if (is_drawable() && mouse_mode == MouseObject && !internal_editing()) {
+                        if (entered_regionview) {
+                                Trimmable::CanTrim ct = entered_regionview->region()->can_trim();
+                                if ((ct & Trimmable::EndTrimEarlier) || (ct & Trimmable::EndTrimLater)) {
+                                        set_canvas_cursor (left_side_trim_cursor);
+                                }
+                        }
+               }
+                break;
+
+       case RightFrameHandle:
+               if (is_drawable() && mouse_mode == MouseObject && !internal_editing()) {
+                        if (entered_regionview) {
+                                Trimmable::CanTrim ct = entered_regionview->region()->can_trim();
+                                if ((ct & Trimmable::FrontTrimEarlier) || (ct & Trimmable::FrontTrimLater)) {
+                                        set_canvas_cursor (right_side_trim_cursor);
+                                }
+                        }
+               }
+                break;
+
        case StartSelectionTrimItem:
        case EndSelectionTrimItem:
 
@@ -1427,7 +1613,7 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
 #endif
 
                if (is_drawable()) {
-                       track_canvas->get_window()->set_cursor (*trimmer_cursor);
+                       set_canvas_cursor (trimmer_cursor);
                }
                break;
 
@@ -1435,10 +1621,10 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
                if (is_drawable()) {
                        switch (_edit_point) {
                        case EditAtMouse:
-                               track_canvas->get_window()->set_cursor (*grabber_edit_point_cursor);
+                               set_canvas_cursor (grabber_edit_point_cursor);
                                break;
                        default:
-                               track_canvas->get_window()->set_cursor (*grabber_cursor);
+                               set_canvas_cursor (grabber_cursor);
                                break;
                        }
                }
@@ -1450,7 +1636,7 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
 
                if (!reinterpret_cast<RegionView *> (item->get_data ("regionview"))->name_active()) {
                        if (mouse_mode == MouseObject && is_drawable()) {
-                               track_canvas->get_window()->set_cursor (*trimmer_cursor);
+                               set_canvas_cursor (trimmer_cursor);
                        }
                }
                break;
@@ -1464,14 +1650,14 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
                                cursor = selector_cursor;
                                break;
                        case MouseZoom:
-                               cursor = zoom_cursor;
+                               cursor = zoom_in_cursor;
                                break;
                        default:
                                cursor = cross_hair_cursor;
                                break;
                        }
 
-                       track_canvas->get_window()->set_cursor (*cursor);
+                       set_canvas_cursor (cursor);
 
                        AutomationTimeAxisView* atv;
                        if ((atv = static_cast<AutomationTimeAxisView*>(item->get_data ("trackview"))) != 0) {
@@ -1488,7 +1674,7 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
        case MeterBarItem:
        case TempoBarItem:
                if (is_drawable()) {
-                       track_canvas->get_window()->set_cursor (*timebar_cursor);
+                       set_canvas_cursor (timebar_cursor);
                }
                break;
 
@@ -1502,20 +1688,41 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
        case MeterMarkerItem:
        case TempoMarkerItem:
                if (is_drawable()) {
-                       track_canvas->get_window()->set_cursor (*timebar_cursor);
+                       set_canvas_cursor (timebar_cursor);
                }
                break;
+
        case FadeInHandleItem:
+               if (mouse_mode == MouseObject && !internal_editing()) {
+                       ArdourCanvas::SimpleRect *rect = dynamic_cast<ArdourCanvas::SimpleRect *> (item);
+                       if (rect) {
+                               rect->property_fill_color_rgba() = 0xBBBBBBAA;
+                       }
+                       set_canvas_cursor (fade_in_cursor);
+               }
+                break;
+
        case FadeOutHandleItem:
-               if (mouse_mode == MouseObject) {
+               if (mouse_mode == MouseObject && !internal_editing()) {
                        ArdourCanvas::SimpleRect *rect = dynamic_cast<ArdourCanvas::SimpleRect *> (item);
                        if (rect) {
-                               rect->property_fill_color_rgba() = 0;
-                               rect->property_outline_pixels() = 1;
+                               rect->property_fill_color_rgba() = 0xBBBBBBAA;
                        }
+                       set_canvas_cursor (fade_out_cursor);
                }
                break;
-
+       case FeatureLineItem:
+               {
+                       ArdourCanvas::SimpleLine *line = dynamic_cast<ArdourCanvas::SimpleLine *> (item);
+                       line->property_color_rgba() = 0xFF0000FF;
+               }
+               break;
+       case SelectionItem:
+               if (join_object_range_button.get_active()) {
+                       set_canvas_cursor ();
+               }
+               break;
+               
        default:
                break;
        }
@@ -1540,11 +1747,11 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
                break;
        }
 
-       return false;
+       return ret;
 }
 
 bool
-Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType item_type)
+Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
 {
        AutomationLine* al;
        ControlPoint* cp;
@@ -1552,24 +1759,27 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
        Location *loc;
        RegionView* rv;
        bool is_start;
+        bool ret = true;
 
        switch (item_type) {
        case ControlPointItem:
                cp = reinterpret_cast<ControlPoint*>(item->get_data ("control_point"));
                if (cp->line().the_list()->interpolation() != AutomationList::Discrete) {
-                       if (cp->line().npoints() > 1 && !cp->selected()) {
+                       if (cp->line().npoints() > 1 && !cp->get_selected()) {
                                cp->set_visible (false);
                        }
                }
 
                if (is_drawable()) {
-                       track_canvas->get_window()->set_cursor (*current_canvas_cursor);
+                        set_canvas_cursor (current_canvas_cursor);
                }
 
                hide_verbose_canvas_cursor ();
                break;
 
        case RegionViewNameHighlight:
+       case LeftFrameHandle:
+       case RightFrameHandle:
        case StartSelectionTrimItem:
        case EndSelectionTrimItem:
        case PlayheadCursorItem:
@@ -1582,7 +1792,7 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
 #endif
 
                if (is_drawable()) {
-                       track_canvas->get_window()->set_cursor (*current_canvas_cursor);
+                        set_canvas_cursor (current_canvas_cursor);
                }
                break;
 
@@ -1595,7 +1805,7 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
                                line->property_fill_color_rgba() = al->get_line_color();
                }
                if (is_drawable()) {
-                       track_canvas->get_window()->set_cursor (*current_canvas_cursor);
+                        set_canvas_cursor (current_canvas_cursor);
                }
                break;
 
@@ -1603,7 +1813,7 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
                /* see enter_handler() for notes */
                if (!reinterpret_cast<RegionView *> (item->get_data ("regionview"))->name_active()) {
                        if (is_drawable() && mouse_mode == MouseObject) {
-                               track_canvas->get_window()->set_cursor (*current_canvas_cursor);
+                                set_canvas_cursor (current_canvas_cursor);
                        }
                }
                break;
@@ -1615,7 +1825,7 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
        case TempoBarItem:
        case MarkerBarItem:
                if (is_drawable()) {
-                       track_canvas->get_window()->set_cursor (*current_canvas_cursor);
+                        set_canvas_cursor (current_canvas_cursor);
                }
                break;
 
@@ -1632,7 +1842,7 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
        case TempoMarkerItem:
 
                if (is_drawable()) {
-                       track_canvas->get_window()->set_cursor (*timebar_cursor);
+                       set_canvas_cursor (timebar_cursor);
                }
 
                break;
@@ -1647,21 +1857,28 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* /*event*/, ItemType i
                                rect->property_outline_pixels() = 0;
                        }
                }
+                set_canvas_cursor (current_canvas_cursor);
                break;
 
        case AutomationTrackItem:
                if (is_drawable()) {
-                       track_canvas->get_window()->set_cursor (*current_canvas_cursor);
+                        set_canvas_cursor (current_canvas_cursor);
                        clear_entered_track = true;
                        Glib::signal_idle().connect (sigc::mem_fun(*this, &Editor::left_automation_track));
                }
                break;
+       case FeatureLineItem:
+               {
+                       ArdourCanvas::SimpleLine *line = dynamic_cast<ArdourCanvas::SimpleLine *> (item);
+                       line->property_color_rgba() = (guint) ARDOUR_UI::config()->canvasvar_ZeroLine.get();;
+               }
+               break;
 
        default:
                break;
        }
 
-       return false;
+       return ret;
 }
 
 gint
@@ -1675,19 +1892,19 @@ Editor::left_automation_track ()
 }
 
 void
-Editor::scrub ()
+Editor::scrub (framepos_t frame, double current_x)
 {
        double delta;
 
        if (scrubbing_direction == 0) {
                /* first move */
-               session->request_locate (_drag->current_pointer_frame(), false);
-               session->request_transport_speed (0.1);
+               _session->request_locate (frame, false);
+               _session->request_transport_speed (0.1);
                scrubbing_direction = 1;
 
        } else {
 
-               if (last_scrub_x > _drag->current_pointer_x()) {
+               if (last_scrub_x > current_x) {
 
                        /* pointer moved to the left */
 
@@ -1696,7 +1913,7 @@ Editor::scrub ()
                                /* we reversed direction to go backwards */
 
                                scrub_reversals++;
-                               scrub_reverse_distance += (int) (last_scrub_x - _drag->current_pointer_x());
+                               scrub_reverse_distance += (int) (last_scrub_x - current_x);
 
                        } else {
 
@@ -1705,8 +1922,8 @@ Editor::scrub ()
                                scrub_reversals = 0;
                                scrub_reverse_distance = 0;
 
-                               delta = 0.01 * (last_scrub_x - _drag->current_pointer_x());
-                               session->request_transport_speed (session->transport_speed() - delta);
+                               delta = 0.01 * (last_scrub_x - current_x);
+                               _session->request_transport_speed (_session->transport_speed() - delta);
                        }
 
                } else {
@@ -1716,7 +1933,7 @@ Editor::scrub ()
                                /* we reversed direction to go forward */
 
                                scrub_reversals++;
-                               scrub_reverse_distance += (int) (_drag->current_pointer_x() - last_scrub_x);
+                               scrub_reverse_distance += (int) (current_x - last_scrub_x);
 
                        } else {
                                /* still moving to the right */
@@ -1724,8 +1941,8 @@ Editor::scrub ()
                                scrub_reversals = 0;
                                scrub_reverse_distance = 0;
 
-                               delta = 0.01 * (_drag->current_pointer_x() - last_scrub_x);
-                               session->request_transport_speed (session->transport_speed() + delta);
+                               delta = 0.01 * (current_x - last_scrub_x);
+                               _session->request_transport_speed (_session->transport_speed() + delta);
                        }
                }
 
@@ -1737,11 +1954,11 @@ Editor::scrub ()
 
                        if (scrubbing_direction > 0) {
                                /* was forwards, go backwards */
-                               session->request_transport_speed (-0.1);
+                               _session->request_transport_speed (-0.1);
                                scrubbing_direction = -1;
                        } else {
                                /* was backwards, go forwards */
-                               session->request_transport_speed (0.1);
+                               _session->request_transport_speed (0.1);
                                scrubbing_direction = 1;
                        }
 
@@ -1750,12 +1967,14 @@ Editor::scrub ()
                }
        }
 
-       last_scrub_x = _drag->current_pointer_x();
+       last_scrub_x = current_x;
 }
 
 bool
 Editor::motion_handler (ArdourCanvas::Item* /*item*/, GdkEvent* event, bool from_autoscroll)
 {
+       _last_motion_y = event->motion.y;
+       
        if (event->motion.is_hint) {
                gint x, y;
 
@@ -1777,16 +1996,22 @@ Editor::motion_handler (ArdourCanvas::Item* /*item*/, GdkEvent* event, bool from
                step_timeout.disconnect ();
        }
 
-       if (session && session->actively_recording()) {
+       if (_session && _session->actively_recording()) {
                /* Sorry. no dragging stuff around while we record */
                return true;
        }
 
-       bool handled = false;
-       if (_drag) {
-               handled = _drag->motion_handler (event, from_autoscroll);
+       JoinObjectRangeState const old = _join_object_range_state;
+       update_join_object_range_location (event->motion.x, event->motion.y);
+       if (_join_object_range_state != old) {
+               set_canvas_cursor ();
        }
 
+       bool handled = false;
+       if (_drags->active ()) {
+               handled = _drags->motion_handler (event, from_autoscroll);
+       }
+       
        if (!handled) {
                return false;
        }
@@ -1848,6 +2073,19 @@ Editor::edit_control_point (ArdourCanvas::Item* item)
        p->line().modify_point_y (*p, d.get_y_fraction ());
 }
 
+void
+Editor::edit_note (ArdourCanvas::Item* item)
+{
+       ArdourCanvas::CanvasNoteEvent* e = dynamic_cast<ArdourCanvas::CanvasNoteEvent*> (item);
+       assert (e);
+
+       EditNoteDialog d (&e->region_view(), e);
+       d.set_position (Gtk::WIN_POS_MOUSE);
+       ensure_float (d);
+
+       d.run ();
+}
+       
 
 void
 Editor::visible_order_range (int* low, int* high) const
@@ -1884,40 +2122,40 @@ Editor::region_view_item_click (AudioRegionView& rv, GdkEventButton* event)
                RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*>(tv);
                double speed = 1.0;
                if (rtv && rtv->is_track()) {
-                       speed = rtv->get_diskstream()->speed();
+                       speed = rtv->track()->speed();
                }
 
-               nframes64_t where = get_preferred_edit_position();
+               framepos_t where = get_preferred_edit_position();
 
                if (where >= 0) {
 
                        if (Keyboard::modifier_state_equals (event->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier|Keyboard::SecondaryModifier))) {
 
-                               align_region (rv.region(), SyncPoint, (nframes64_t) (where * speed));
+                               align_region (rv.region(), SyncPoint, (framepos_t) (where * speed));
 
                        } else if (Keyboard::modifier_state_equals (event->state, Keyboard::ModifierMask (Keyboard::PrimaryModifier|Keyboard::TertiaryModifier))) {
 
-                               align_region (rv.region(), End, (nframes64_t) (where * speed));
+                               align_region (rv.region(), End, (framepos_t) (where * speed));
 
                        } else {
 
-                               align_region (rv.region(), Start, (nframes64_t) (where * speed));
+                               align_region (rv.region(), Start, (framepos_t) (where * speed));
                        }
                }
        }
 }
 
 void
-Editor::show_verbose_time_cursor (nframes64_t frame, double offset, double xpos, double ypos)
+Editor::show_verbose_time_cursor (framepos_t frame, double offset, double xpos, double ypos)
 {
        char buf[128];
        Timecode::Time timecode;
        BBT_Time bbt;
        int hours, mins;
-       nframes64_t frame_rate;
+       framepos_t frame_rate;
        float secs;
 
-       if (session == 0) {
+       if (_session == 0) {
                return;
        }
 
@@ -1931,24 +2169,24 @@ Editor::show_verbose_time_cursor (nframes64_t frame, double offset, double xpos,
 
        switch (m) {
        case AudioClock::BBT:
-               session->bbt_time (frame, bbt);
+               _session->bbt_time (frame, bbt);
                snprintf (buf, sizeof (buf), "%02" PRIu32 "|%02" PRIu32 "|%02" PRIu32, bbt.bars, bbt.beats, bbt.ticks);
                break;
 
        case AudioClock::Timecode:
-               session->timecode_time (frame, timecode);
+               _session->timecode_time (frame, timecode);
                snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32, timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
                break;
 
        case AudioClock::MinSec:
                /* XXX this is copied from show_verbose_duration_cursor() */
-               frame_rate = session->frame_rate();
+               frame_rate = _session->frame_rate();
                hours = frame / (frame_rate * 3600);
                frame = frame % (frame_rate * 3600);
                mins = frame / (frame_rate * 60);
                frame = frame % (frame_rate * 60);
                secs = (float) frame / (float) frame_rate;
-               snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%.4f", hours, mins, secs);
+               snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%07.4f", hours, mins, secs);
                break;
 
        default:
@@ -1959,24 +2197,24 @@ Editor::show_verbose_time_cursor (nframes64_t frame, double offset, double xpos,
        if (xpos >= 0 && ypos >=0) {
                set_verbose_canvas_cursor (buf, xpos + offset, ypos + offset);
        } else {
-               set_verbose_canvas_cursor (buf, _drag->current_pointer_x() + offset - horizontal_adjustment.get_value(), _drag->current_pointer_y() + offset - vertical_adjustment.get_value() + canvas_timebars_vsize);
+               set_verbose_canvas_cursor (buf, _drags->current_pointer_x() + offset - horizontal_position(), _drags->current_pointer_y() + offset - vertical_adjustment.get_value() + canvas_timebars_vsize);
        }
        show_verbose_canvas_cursor ();
 }
 
 void
-Editor::show_verbose_duration_cursor (nframes64_t start, nframes64_t end, double offset, double xpos, double ypos)
+Editor::show_verbose_duration_cursor (framepos_t start, framepos_t end, double offset, double xpos, double ypos)
 {
        char buf[128];
        Timecode::Time timecode;
        BBT_Time sbbt;
        BBT_Time ebbt;
        int hours, mins;
-       nframes64_t distance, frame_rate;
+       framepos_t distance, frame_rate;
        float secs;
-       Meter meter_at_start(session->tempo_map().meter_at(start));
+       Meter meter_at_start(_session->tempo_map().meter_at(start));
 
-       if (session == 0) {
+       if (_session == 0) {
                return;
        }
 
@@ -1990,8 +2228,8 @@ Editor::show_verbose_duration_cursor (nframes64_t start, nframes64_t end, double
 
        switch (m) {
        case AudioClock::BBT:
-               session->bbt_time (start, sbbt);
-               session->bbt_time (end, ebbt);
+               _session->bbt_time (start, sbbt);
+               _session->bbt_time (end, ebbt);
 
                /* subtract */
                /* XXX this computation won't work well if the
@@ -2016,20 +2254,20 @@ Editor::show_verbose_duration_cursor (nframes64_t start, nframes64_t end, double
                break;
 
        case AudioClock::Timecode:
-               session->timecode_duration (end - start, timecode);
+               _session->timecode_duration (end - start, timecode);
                snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32, timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
                break;
 
        case AudioClock::MinSec:
                /* XXX this stuff should be elsewhere.. */
                distance = end - start;
-               frame_rate = session->frame_rate();
+               frame_rate = _session->frame_rate();
                hours = distance / (frame_rate * 3600);
                distance = distance % (frame_rate * 3600);
                mins = distance / (frame_rate * 60);
                distance = distance % (frame_rate * 60);
                secs = (float) distance / (float) frame_rate;
-               snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%.4f", hours, mins, secs);
+               snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%07.4f", hours, mins, secs);
                break;
 
        default:
@@ -2041,7 +2279,7 @@ Editor::show_verbose_duration_cursor (nframes64_t start, nframes64_t end, double
                set_verbose_canvas_cursor (buf, xpos + offset, ypos + offset);
        }
        else {
-               set_verbose_canvas_cursor (buf, _drag->current_pointer_x() + offset, _drag->current_pointer_y() + offset);
+               set_verbose_canvas_cursor (buf, _drags->current_pointer_x() + offset, _drags->current_pointer_y() + offset);
        }
 
        show_verbose_canvas_cursor ();
@@ -2073,7 +2311,7 @@ Editor::cancel_selection ()
 
 
 void
-Editor::single_contents_trim (RegionView& rv, nframes64_t frame_delta, bool left_direction, bool swap_direction, bool obey_snap)
+Editor::single_contents_trim (RegionView& rv, framepos_t frame_delta, bool left_direction, bool swap_direction)
 {
        boost::shared_ptr<Region> region (rv.region());
 
@@ -2081,39 +2319,36 @@ Editor::single_contents_trim (RegionView& rv, nframes64_t frame_delta, bool left
                return;
        }
 
-       nframes64_t new_bound;
+       framepos_t new_bound;
 
        double speed = 1.0;
        TimeAxisView* tvp = clicked_axisview;
        RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
 
        if (tv && tv->is_track()) {
-               speed = tv->get_diskstream()->speed();
+               speed = tv->track()->speed();
        }
 
        if (left_direction) {
                if (swap_direction) {
-                       new_bound = (nframes64_t) (region->position()/speed) + frame_delta;
+                       new_bound = (framepos_t) (region->position()/speed) + frame_delta;
                } else {
-                       new_bound = (nframes64_t) (region->position()/speed) - frame_delta;
+                       new_bound = (framepos_t) (region->position()/speed) - frame_delta;
                }
        } else {
                if (swap_direction) {
-                       new_bound = (nframes64_t) (region->position()/speed) - frame_delta;
+                       new_bound = (framepos_t) (region->position()/speed) - frame_delta;
                } else {
-                       new_bound = (nframes64_t) (region->position()/speed) + frame_delta;
+                       new_bound = (framepos_t) (region->position()/speed) + frame_delta;
                }
        }
 
-       if (obey_snap) {
-               snap_to (new_bound);
-       }
-       region->trim_start ((nframes64_t) (new_bound * speed), this);
-       rv.region_changed (StartChanged);
+       region->trim_start ((framepos_t) (new_bound * speed), this);
+       rv.region_changed (PropertyChange (ARDOUR::Properties::start));
 }
 
 void
-Editor::single_start_trim (RegionView& rv, nframes64_t frame_delta, bool left_direction, bool obey_snap, bool no_overlap)
+Editor::single_start_trim (RegionView& rv, framepos_t new_bound, bool no_overlap)
 {
        boost::shared_ptr<Region> region (rv.region());
 
@@ -2121,29 +2356,17 @@ Editor::single_start_trim (RegionView& rv, nframes64_t frame_delta, bool left_di
                return;
        }
 
-       nframes64_t new_bound;
-
        double speed = 1.0;
        TimeAxisView* tvp = clicked_axisview;
        RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
 
        if (tv && tv->is_track()) {
-               speed = tv->get_diskstream()->speed();
-       }
-
-       if (left_direction) {
-               new_bound = (nframes64_t) (region->position()/speed) - frame_delta;
-       } else {
-               new_bound = (nframes64_t) (region->position()/speed) + frame_delta;
+               speed = tv->track()->speed();
        }
 
-       if (obey_snap) {
-               snap_to (new_bound, (left_direction ? 0 : 1));
-       }
-
-       nframes64_t pre_trim_first_frame = region->first_frame();
+       framepos_t pre_trim_first_frame = region->first_frame();
 
-       region->trim_front ((nframes64_t) (new_bound * speed), this);
+       region->trim_front ((framepos_t) (new_bound * speed), this);
 
        if (no_overlap) {
                //Get the next region on the left of this region and shrink/expand it.
@@ -2164,11 +2387,11 @@ Editor::single_start_trim (RegionView& rv, nframes64_t frame_delta, bool left_di
                }
        }
 
-       rv.region_changed (Change (LengthChanged|PositionChanged|StartChanged));
+       rv.region_changed (ARDOUR::bounds_change);
 }
 
 void
-Editor::single_end_trim (RegionView& rv, nframes64_t frame_delta, bool left_direction, bool obey_snap, bool no_overlap)
+Editor::single_end_trim (RegionView& rv, framepos_t new_bound, bool no_overlap)
 {
        boost::shared_ptr<Region> region (rv.region());
 
@@ -2176,29 +2399,17 @@ Editor::single_end_trim (RegionView& rv, nframes64_t frame_delta, bool left_dire
                return;
        }
 
-       nframes64_t new_bound;
-
        double speed = 1.0;
        TimeAxisView* tvp = clicked_axisview;
        RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
 
        if (tv && tv->is_track()) {
-               speed = tv->get_diskstream()->speed();
+               speed = tv->track()->speed();
        }
 
-       if (left_direction) {
-               new_bound = (nframes64_t) ((region->last_frame() + 1)/speed) - frame_delta;
-       } else {
-               new_bound = (nframes64_t) ((region->last_frame() + 1)/speed) + frame_delta;
-       }
-
-       if (obey_snap) {
-               snap_to (new_bound);
-       }
-
-       nframes64_t pre_trim_last_frame = region->last_frame();
+       framepos_t pre_trim_last_frame = region->last_frame();
 
-       region->trim_end ((nframes64_t) (new_bound * speed), this);
+       region->trim_end ((framepos_t) (new_bound * speed), this);
 
        if (no_overlap) {
                //Get the next region on the right of this region and shrink/expand it.
@@ -2207,8 +2418,8 @@ Editor::single_end_trim (RegionView& rv, nframes64_t frame_delta, bool left_dire
 
                bool regions_touching = false;
 
-               if (region_right != 0 && (pre_trim_last_frame == region_right->first_frame() - 1)){
-                   regions_touching = true;
+               if (region_right != 0 && (pre_trim_last_frame == region_right->first_frame() - 1)) {
+                       regions_touching = true;
                }
 
                //Only trim region on the right if the last frame has gone beyond the right region's first frame.
@@ -2218,27 +2429,23 @@ Editor::single_end_trim (RegionView& rv, nframes64_t frame_delta, bool left_dire
                        region_right->trim_front(region->last_frame() + 1, this);
                }
 
-               rv.region_changed (Change (LengthChanged|PositionChanged|StartChanged));
-       }
-       else {
-               rv.region_changed (LengthChanged);
+               rv.region_changed (ARDOUR::bounds_change);
+                       
+       else {
+               rv.region_changed (PropertyChange (ARDOUR::Properties::length));
        }
 }
 
 
 void
-Editor::point_trim (GdkEvent* event)
+Editor::point_trim (GdkEvent* event, framepos_t new_bound)
 {
        RegionView* rv = clicked_regionview;
 
-       nframes64_t new_bound = _drag->current_pointer_frame();
-
-       snap_to_with_modifier (new_bound, event);
-
        /* Choose action dependant on which button was pressed */
        switch (event->button.button) {
        case 1:
-               begin_reversible_command (_("Start point trim"));
+               begin_reversible_command (_("start point trim"));
 
                if (selection->selected (rv)) {
                        for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin();
@@ -2249,23 +2456,17 @@ Editor::point_trim (GdkEvent* event)
                                }
 
                                if (!(*i)->region()->locked()) {
-                                       boost::shared_ptr<Playlist> pl = (*i)->region()->playlist();
-                                       XMLNode &before = pl->get_state();
-
+                                       (*i)->region()->clear_changes ();
                                        (*i)->region()->trim_front (new_bound, this);
-
-                                       XMLNode &after = pl->get_state();
-                                       session->add_command(new MementoCommand<Playlist>(*pl.get(), &before, &after));
+                                       _session->add_command(new StatefulDiffCommand ((*i)->region()));
                                }
                        }
 
                } else {
                        if (!rv->region()->locked()) {
-                               boost::shared_ptr<Playlist> pl = rv->region()->playlist();
-                               XMLNode &before = pl->get_state();
+                               rv->region()->clear_changes ();
                                rv->region()->trim_front (new_bound, this);
-                               XMLNode &after = pl->get_state();
-                               session->add_command(new MementoCommand<Playlist>(*pl.get(), &before, &after));
+                               _session->add_command(new StatefulDiffCommand (rv->region()));
                        }
                }
 
@@ -2280,22 +2481,18 @@ Editor::point_trim (GdkEvent* event)
                        for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ++i)
                        {
                                if (!(*i)->region()->locked()) {
-                                       boost::shared_ptr<Playlist> pl = (*i)->region()->playlist();
-                                       XMLNode &before = pl->get_state();
+                                       (*i)->region()->clear_changes();
                                        (*i)->region()->trim_end (new_bound, this);
-                                       XMLNode &after = pl->get_state();
-                                       session->add_command(new MementoCommand<Playlist>(*pl.get(), &before, &after));
+                                       _session->add_command(new StatefulDiffCommand ((*i)->region()));
                                }
                        }
 
                } else {
 
                        if (!rv->region()->locked()) {
-                               boost::shared_ptr<Playlist> pl = rv->region()->playlist();
-                               XMLNode &before = pl->get_state();
+                               rv->region()->clear_changes ();
                                rv->region()->trim_end (new_bound, this);
-                               XMLNode &after = pl->get_state();
-                               session->add_command (new MementoCommand<Playlist>(*pl.get(), &before, &after));
+                               _session->add_command (new StatefulDiffCommand (rv->region()));
                        }
                }
 
@@ -2316,7 +2513,7 @@ Editor::thaw_region_after_trim (RegionView& rv)
                return;
        }
 
-       region->thaw (_("trimmed region"));
+       region->resume_property_changes ();
 
        AudioRegionView* arv = dynamic_cast<AudioRegionView*>(&rv);
 
@@ -2342,7 +2539,7 @@ Editor::hide_marker (ArdourCanvas::Item* item, GdkEvent* /*event*/)
 
 
 void
-Editor::reposition_zoom_rect (nframes64_t start, nframes64_t end)
+Editor::reposition_zoom_rect (framepos_t start, framepos_t end)
 {
        double x1 = frame_to_pixel (start);
        double x2 = frame_to_pixel (end);
@@ -2381,7 +2578,7 @@ Editor::mouse_rename_region (ArdourCanvas::Item* /*item*/, GdkEvent* /*event*/)
 
 
 void
-Editor::mouse_brush_insert_region (RegionView* rv, nframes64_t pos)
+Editor::mouse_brush_insert_region (RegionView* rv, framepos_t pos)
 {
        /* no brushing without a useful snap setting */
 
@@ -2413,16 +2610,16 @@ Editor::mouse_brush_insert_region (RegionView* rv, nframes64_t pos)
        }
 
        boost::shared_ptr<Playlist> playlist = rtv->playlist();
-       double speed = rtv->get_diskstream()->speed();
+       double speed = rtv->track()->speed();
 
-       XMLNode &before = playlist->get_state();
-       playlist->add_region (RegionFactory::create (rv->region()), (nframes64_t) (pos * speed));
-       XMLNode &after = playlist->get_state();
-       session->add_command(new MementoCommand<Playlist>(*playlist.get(), &before, &after));
+        playlist->clear_changes ();
+       boost::shared_ptr<Region> new_region (RegionFactory::create (rv->region()));
+        playlist->add_region (new_region, (framepos_t) (pos * speed));
+       _session->add_command (new StatefulDiffCommand (playlist));
 
-       // playlist is frozen, so we have to update manually
+       // playlist is frozen, so we have to update manually XXX this is disgusting
 
-       playlist->Modified(); /* EMIT SIGNAL */
+       playlist->RegionAdded (new_region); /* EMIT SIGNAL */
 }
 
 gint
@@ -2436,55 +2633,57 @@ Editor::track_height_step_timeout ()
 }
 
 void
-Editor::start_region_grab (ArdourCanvas::Item* item, GdkEvent* event, RegionView* region_view)
+Editor::add_region_drag (ArdourCanvas::Item* item, GdkEvent* event, RegionView* region_view)
 {
        assert (region_view);
 
-       _region_motion_group->raise_to_top ();
+        if (!region_view->region()->playlist()) {
+                return;
+        }
 
-       assert (_drag == 0);
+       _region_motion_group->raise_to_top ();
 
        if (Config->get_edit_mode() == Splice) {
-               _drag = new RegionSpliceDrag (this, item, region_view, selection->regions.by_layer());
+               _drags->add (new RegionSpliceDrag (this, item, region_view, selection->regions.by_layer()));
        } else {
-               RegionSelection s = get_equivalent_regions (selection->regions, RouteGroup::Edit);
-               _drag = new RegionMoveDrag (this, item, region_view, s.by_layer(), false, false);
+               RegionSelection s = get_equivalent_regions (selection->regions, ARDOUR::Properties::edit.property_id);
+               _drags->add (new RegionMoveDrag (this, item, region_view, s.by_layer(), false, false));
        }
 
-       _drag->start_grab (event);
-
-       begin_reversible_command (_("move region(s)"));
-
        /* sync the canvas to what we think is its current state */
        update_canvas_now();
 }
 
 void
-Editor::start_region_copy_grab (ArdourCanvas::Item* item, GdkEvent* event, RegionView* region_view)
+Editor::add_region_copy_drag (ArdourCanvas::Item* item, GdkEvent* event, RegionView* region_view)
 {
        assert (region_view);
-       assert (_drag == 0);
+
+        if (!region_view->region()->playlist()) {
+                return;
+        }
 
        _region_motion_group->raise_to_top ();
 
-       RegionSelection s = get_equivalent_regions (selection->regions, RouteGroup::Edit);
-       _drag = new RegionMoveDrag (this, item, region_view, s.by_layer(), false, true);
-       _drag->start_grab(event);
+       RegionSelection s = get_equivalent_regions (selection->regions, ARDOUR::Properties::edit.property_id);
+       _drags->add (new RegionMoveDrag (this, item, region_view, s.by_layer(), false, true));
 }
 
 void
-Editor::start_region_brush_grab (ArdourCanvas::Item* item, GdkEvent* event, RegionView* region_view)
+Editor::add_region_brush_drag (ArdourCanvas::Item* item, GdkEvent* event, RegionView* region_view)
 {
        assert (region_view);
-       assert (_drag == 0);
 
+        if (!region_view->region()->playlist()) {
+                return;
+        }
+        
        if (Config->get_edit_mode() == Splice) {
                return;
        }
 
-       RegionSelection s = get_equivalent_regions (selection->regions, RouteGroup::Edit);
-       _drag = new RegionMoveDrag (this, item, region_view, s.by_layer(), true, false);
-       _drag->start_grab (event);
+       RegionSelection s = get_equivalent_regions (selection->regions, ARDOUR::Properties::edit.property_id);
+       _drags->add (new RegionMoveDrag (this, item, region_view, s.by_layer(), true, false));
 
        begin_reversible_command (_("Drag region brush"));
 }
@@ -2531,10 +2730,9 @@ Editor::start_selection_grab (ArdourCanvas::Item* /*item*/, GdkEvent* event)
 
        boost::shared_ptr<Playlist> playlist = clicked_axisview->playlist();
 
-       XMLNode *before = &(playlist->get_state());
+        playlist->clear_changes ();
        clicked_routeview->playlist()->add_region (region, selection->time[clicked_selection].start);
-       XMLNode *after = &(playlist->get_state());
-       session->add_command(new MementoCommand<Playlist>(*playlist, before, after));
+       _session->add_command(new StatefulDiffCommand (playlist));
 
        commit_reversible_command ();
 
@@ -2550,16 +2748,16 @@ Editor::start_selection_grab (ArdourCanvas::Item* /*item*/, GdkEvent* event)
        */
        selection->set (latest_regionviews);
 
-       assert (_drag == 0);
-       _drag = new RegionMoveDrag (this, latest_regionviews.front()->get_canvas_group(), latest_regionviews.front(), latest_regionviews, false, false);
-       _drag->start_grab (event);
+       _drags->set (new RegionMoveDrag (this, latest_regionviews.front()->get_canvas_group(), latest_regionviews.front(), latest_regionviews, false, false), event);
 }
 
 void
-Editor::break_drag ()
+Editor::escape ()
 {
-       if (_drag) {
-               _drag->break_drag ();
+       if (_drags->active ()) {
+               _drags->abort ();
+       } else {
+               selection->clear ();
        }
 }
 
@@ -2571,30 +2769,83 @@ Editor::set_internal_edit (bool yn)
        if (yn) {
                mouse_select_button.set_image (*(manage (new Image (::get_icon("midi_tool_pencil")))));
                mouse_select_button.get_image ()->show ();
+                ARDOUR_UI::instance()->set_tip (mouse_select_button, _("Draw/Edit MIDI Notes"));
+                set_canvas_cursor ();
 
-               for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-                       MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*> (*i);
-                       if (mtv) {
-                               mtv->start_step_editing ();
-                       }
-               }
-               start_step_editing ();
+               /* deselect everything to avoid confusion when e.g. we can't now cut a previously selected
+                  region because cut means "cut note" rather than "cut region".
+               */
+               selection->clear ();
 
        } else {
 
                mouse_select_button.set_image (*(manage (new Image (::get_icon("tool_range")))));
                mouse_select_button.get_image ()->show ();
-               stop_step_editing ();
+                ARDOUR_UI::instance()->set_tip (mouse_select_button, _("Select/Move Ranges"));
+                mouse_mode_toggled (mouse_mode); // sets cursor
+       }
+}
 
-               for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-                       MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*> (*i);
-                       if (mtv) {
-                               mtv->stop_step_editing ();
-                       }
+/** Update _join_object_range_state which indicate whether we are over the top or bottom half of a region view,
+ *  used by the `join object/range' tool mode.
+ */
+void
+Editor::update_join_object_range_location (double x, double y)
+{
+       /* XXX: actually, this decides based on whether the mouse is in the top or bottom half of a RouteTimeAxisView;
+          entered_{track,regionview} is not always setup (e.g. if the mouse is over a TimeSelection), and to get a Region
+          that we're over requires searching the playlist.
+       */
+          
+       if (join_object_range_button.get_active() == false || (mouse_mode != MouseRange && mouse_mode != MouseObject)) {
+               _join_object_range_state = JOIN_OBJECT_RANGE_NONE;
+               return;
+       }
+       
+       if (mouse_mode == MouseObject) {
+               _join_object_range_state = JOIN_OBJECT_RANGE_OBJECT;
+       } else if (mouse_mode == MouseRange) {
+               _join_object_range_state = JOIN_OBJECT_RANGE_RANGE;
+       }
+
+       /* XXX: maybe we should make entered_track work in all cases, rather than resorting to this */
+       pair<TimeAxisView*, int> tvp = trackview_by_y_position (y + vertical_adjustment.get_value() - canvas_timebars_vsize);
+       
+       if (tvp.first) {
+
+               RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (tvp.first);
+               if (rtv) {
+
+                       double cx = 0;
+                       double cy = y;
+                       rtv->canvas_display()->w2i (cx, cy);
+
+                       double const c = cy / rtv->view()->child_height();
+                       double d;
+                       double const f = modf (c, &d);
+
+                       _join_object_range_state = f < 0.5 ? JOIN_OBJECT_RANGE_RANGE : JOIN_OBJECT_RANGE_OBJECT;
                }
        }
+}
 
-       set_canvas_cursor ();
+Editing::MouseMode
+Editor::effective_mouse_mode () const
+{
+       if (_join_object_range_state == JOIN_OBJECT_RANGE_OBJECT) {
+               return MouseObject;
+       } else if (_join_object_range_state == JOIN_OBJECT_RANGE_RANGE) {
+               return MouseRange;
+       }
+
+       return mouse_mode;
+}
 
+void
+Editor::remove_midi_note (ArdourCanvas::Item* item, GdkEvent *)
+{
+       ArdourCanvas::CanvasNoteEvent* e = dynamic_cast<ArdourCanvas::CanvasNoteEvent*> (item);
+       assert (e);
 
+       e->region_view().delete_note (e->note ());
 }