Heavy-duty abstraction work to split type-specific classes into
[ardour.git] / gtk2_ardour / editor_mouse.cc
index c140213bb29732d4e4a971ded8e13ad83a6ac222..7e9af2dcb01f1acdec388a0ae9ea895c3c1c558f 100644 (file)
@@ -18,6 +18,7 @@
     $Id$
 */
 
+#include <cassert>
 #include <cstdlib>
 #include <stdint.h>
 #include <cmath>
@@ -32,7 +33,7 @@
 #include "editor.h"
 #include "time_axis_view.h"
 #include "audio_time_axis.h"
-#include "regionview.h"
+#include "audio_region_view.h"
 #include "marker.h"
 #include "streamview.h"
 #include "region_gain_line.h"
@@ -61,6 +62,7 @@
 
 using namespace std;
 using namespace ARDOUR;
+using namespace PBD;
 using namespace sigc;
 using namespace Gtk;
 using namespace Editing;
@@ -181,7 +183,7 @@ Editor::set_mouse_mode (MouseMode m, bool force)
                   show the object (region) selection.
                */
 
-               for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
+               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) {
@@ -318,8 +320,8 @@ Editor::button_selection (ArdourCanvas::Item* item, GdkEvent* event, ItemType it
                commit = (c1 || c2);
                break;
                
-       case AudioRegionViewNameHighlight:
-       case AudioRegionViewName:
+       case RegionViewNameHighlight:
+       case RegionViewName:
                c1 = set_selected_track_from_click (press, op, true, true);
                c2 = set_selected_regionview_from_click (press, op, true);
                commit = (c1 || c2);
@@ -520,12 +522,12 @@ Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemTyp
                                        }
                                        break;
                                        
-                               case AudioRegionViewNameHighlight:
+                               case RegionViewNameHighlight:
                                        start_trim (item, event);
                                        return true;
                                        break;
                                        
-                               case AudioRegionViewName:
+                               case RegionViewName:
                                        /* rename happens on edit clicks */
                                                start_trim (clicked_regionview->get_name_highlight(), event);
                                                return true;
@@ -691,12 +693,12 @@ Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemTyp
                        
                        
                        switch (item_type) {
-                       case AudioRegionViewNameHighlight:
+                       case RegionViewNameHighlight:
                                start_trim (item, event);
                                return true;
                                break;
                                
-                       case AudioRegionViewName:
+                       case RegionViewName:
                                start_trim (clicked_regionview->get_name_highlight(), event);
                                return true;
                                break;
@@ -852,7 +854,7 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                        edit_meter_marker (item);
                        break;
                        
-               case AudioRegionViewName:
+               case RegionViewName:
                        if (clicked_regionview->name_active()) {
                                return mouse_rename_region (item, event);
                        }
@@ -887,8 +889,8 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                                break;
                                
                        case RegionItem:
-                       case AudioRegionViewNameHighlight:
-                       case AudioRegionViewName:
+                       case RegionViewNameHighlight:
+                       case RegionViewName:
                                popup_track_context_menu (1, event->button.time, item_type, false, where);
                                break;
                                
@@ -1046,9 +1048,13 @@ 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:
-                               clicked_regionview->add_gain_point_event (item, event);
+                               dynamic_cast<AudioRegionView*>(clicked_regionview)->add_gain_point_event (item, event);
                                return true;
                                break;
                                
@@ -1202,7 +1208,7 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_
                }
                break;
                
-       case AudioRegionViewNameHighlight:
+       case RegionViewNameHighlight:
                if (is_drawable() && mouse_mode == MouseObject) {
                        track_canvas.get_window()->set_cursor (*trimmer_cursor);
                }
@@ -1229,11 +1235,11 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_
                }
                break;
 
-       case AudioRegionViewName:
+       case RegionViewName:
                
                /* when the name is not an active item, the entire name highlight is for trimming */
 
-               if (!reinterpret_cast<AudioRegionView *> (item->get_data ("regionview"))->name_active()) {
+               if (!reinterpret_cast<RegionView *> (item->get_data ("regionview"))->name_active()) {
                        if (mouse_mode == MouseObject && is_drawable()) {
                                track_canvas.get_window()->set_cursor (*trimmer_cursor);
                        }
@@ -1338,7 +1344,7 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_
        ControlPoint* cp;
        Marker *marker;
        Location *loc;
-       AudioRegionView* rv;
+       RegionView* rv;
        bool is_start;
 
        switch (item_type) {
@@ -1360,7 +1366,7 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_
                hide_verbose_canvas_cursor ();
                break;
                
-       case AudioRegionViewNameHighlight:
+       case RegionViewNameHighlight:
        case StartSelectionTrimItem:
        case EndSelectionTrimItem:
        case EditCursorItem:
@@ -1391,9 +1397,9 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_
                }
                break;
 
-       case AudioRegionViewName:
+       case RegionViewName:
                /* see enter_handler() for notes */
-               if (!reinterpret_cast<AudioRegionView *> (item->get_data ("regionview"))->name_active()) {
+               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);
                        }
@@ -1428,7 +1434,7 @@ Editor::leave_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_
 
        case FadeInHandleItem:
        case FadeOutHandleItem:
-               rv = static_cast<AudioRegionView*>(item->get_data ("regionview"));
+               rv = static_cast<RegionView*>(item->get_data ("regionview"));
                {
                        ArdourCanvas::SimpleRect *rect = dynamic_cast<ArdourCanvas::SimpleRect *> (item);
                        if (rect) {
@@ -1523,7 +1529,7 @@ Editor::motion_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item
        case PanAutomationControlPointItem:
        case TempoMarkerItem:
        case MeterMarkerItem:
-       case AudioRegionViewNameHighlight:
+       case RegionViewNameHighlight:
        case StartSelectionTrimItem:
        case EndSelectionTrimItem:
        case SelectionItem:
@@ -1744,7 +1750,7 @@ Editor::start_fade_in_grab (ArdourCanvas::Item* item, GdkEvent* event)
 
        AudioRegionView* arv = static_cast<AudioRegionView*>(drag_info.data);
 
-       drag_info.pointer_frame_offset = drag_info.grab_frame - ((jack_nframes_t) arv->region.fade_in().back()->when + arv->region.position()); 
+       drag_info.pointer_frame_offset = drag_info.grab_frame - ((jack_nframes_t) arv->audio_region().fade_in().back()->when + arv->region().position());       
 }
 
 void
@@ -1765,17 +1771,17 @@ Editor::fade_in_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
                snap_to (pos);
        }
        
-       if (pos < (arv->region.position() + 64)) {
+       if (pos < (arv->region().position() + 64)) {
                fade_length = 64; // this should be a minimum defined somewhere
-       } else if (pos > arv->region.last_frame()) {
-               fade_length = arv->region.length();
+       } else if (pos > arv->region().last_frame()) {
+               fade_length = arv->region().length();
        } else {
-               fade_length = pos - arv->region.position();
+               fade_length = pos - arv->region().position();
        }
        
        arv->reset_fade_in_shape_width (fade_length);
 
-       show_verbose_duration_cursor (arv->region.position(),  arv->region.position() + fade_length, 10);
+       show_verbose_duration_cursor (arv->region().position(),  arv->region().position() + fade_length, 10);
 
        drag_info.first_move = false;
 }
@@ -1800,20 +1806,20 @@ Editor::fade_in_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* even
                snap_to (pos);
        }
 
-       if (pos < (arv->region.position() + 64)) {
+       if (pos < (arv->region().position() + 64)) {
                fade_length = 64; // this should be a minimum defined somewhere
        }
-       else if (pos > arv->region.last_frame()) {
-               fade_length = arv->region.length();
+       else if (pos > arv->region().last_frame()) {
+               fade_length = arv->region().length();
        }
        else {
-               fade_length = pos - arv->region.position();
+               fade_length = pos - arv->region().position();
        }
 
        begin_reversible_command (_("change fade in length"));
-       session->add_undo (arv->region.get_memento());
-       arv->region.set_fade_in_length (fade_length);
-       session->add_redo_no_execute (arv->region.get_memento());
+       session->add_undo (arv->region().get_memento());
+       arv->audio_region().set_fade_in_length (fade_length);
+       session->add_redo_no_execute (arv->region().get_memento());
        commit_reversible_command ();
        fade_in_drag_motion_callback (item, event);
 }
@@ -1834,7 +1840,7 @@ Editor::start_fade_out_grab (ArdourCanvas::Item* item, GdkEvent* event)
 
        AudioRegionView* arv = static_cast<AudioRegionView*>(drag_info.data);
 
-       drag_info.pointer_frame_offset = drag_info.grab_frame - (arv->region.length() - (jack_nframes_t) arv->region.fade_out().back()->when + arv->region.position()); 
+       drag_info.pointer_frame_offset = drag_info.grab_frame - (arv->region().length() - (jack_nframes_t) arv->audio_region().fade_out().back()->when + arv->region().position());     
 }
 
 void
@@ -1855,19 +1861,19 @@ Editor::fade_out_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event
                snap_to (pos);
        }
 
-       if (pos > (arv->region.last_frame() - 64)) {
+       if (pos > (arv->region().last_frame() - 64)) {
                fade_length = 64; // this should really be a minimum fade defined somewhere
        }
-       else if (pos < arv->region.position()) {
-               fade_length = arv->region.length();
+       else if (pos < arv->region().position()) {
+               fade_length = arv->region().length();
        }
        else {
-               fade_length = arv->region.last_frame() - pos;
+               fade_length = arv->region().last_frame() - pos;
        }
        
        arv->reset_fade_out_shape_width (fade_length);
 
-       show_verbose_duration_cursor (arv->region.last_frame() - fade_length, arv->region.last_frame(), 10);
+       show_verbose_duration_cursor (arv->region().last_frame() - fade_length, arv->region().last_frame(), 10);
 
        drag_info.first_move = false;
 }
@@ -1892,20 +1898,20 @@ Editor::fade_out_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* eve
                snap_to (pos);
        }
 
-       if (pos > (arv->region.last_frame() - 64)) {
+       if (pos > (arv->region().last_frame() - 64)) {
                fade_length = 64; // this should really be a minimum fade defined somewhere
        }
-       else if (pos < arv->region.position()) {
-               fade_length = arv->region.length();
+       else if (pos < arv->region().position()) {
+               fade_length = arv->region().length();
        }
        else {
-               fade_length = arv->region.last_frame() - pos;
+               fade_length = arv->region().last_frame() - pos;
        }
 
        begin_reversible_command (_("change fade out length"));
-       session->add_undo (arv->region.get_memento());
-       arv->region.set_fade_out_length (fade_length);
-       session->add_redo_no_execute (arv->region.get_memento());
+       session->add_undo (arv->region().get_memento());
+       arv->audio_region().set_fade_out_length (fade_length);
+       session->add_redo_no_execute (arv->region().get_memento());
        commit_reversible_command ();
 
        fade_out_drag_motion_callback (item, event);
@@ -2028,7 +2034,7 @@ Editor::start_marker_grab (ArdourCanvas::Item* item, GdkEvent* event)
 
        drag_info.copied_location = new Location (*location);
        drag_info.pointer_frame_offset = drag_info.grab_frame - (is_start ? location->start() : location->end());       
-       
+
        update_marker_drag_item (location);
 
        if (location->is_mark()) {
@@ -2087,31 +2093,39 @@ Editor::marker_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
                move_both = true;
        }
 
-       if (is_start) { // start marker
+       if (copy_location->is_mark()) {
+               /* just move it */
 
-               if (move_both) {
-                       copy_location->set_start (newframe);
-                       copy_location->set_end (newframe + f_delta);
-               } else  if (newframe < copy_location->end()) {
-                       copy_location->set_start (newframe);
-               } else { 
-                       snap_to (next, 1, true);
-                       copy_location->set_end (next);
-                       copy_location->set_start (newframe);
-               }
+               copy_location->set_start (newframe);
 
-       } else { // end marker
+       } else {
 
-               if (move_both) {
-                       copy_location->set_end (newframe);
-                       copy_location->set_start (newframe - f_delta);
-               } else if (newframe > copy_location->start()) {
-                       copy_location->set_end (newframe);
+               if (is_start) { // start-of-range marker
                        
-               } else if (newframe > 0) {
-                       snap_to (next, -1, true);
-                       copy_location->set_start (next);
-                       copy_location->set_end (newframe);
+                       if (move_both) {
+                               copy_location->set_start (newframe);
+                               copy_location->set_end (newframe + f_delta);
+                       } else  if (newframe < copy_location->end()) {
+                               copy_location->set_start (newframe);
+                       } else { 
+                               snap_to (next, 1, true);
+                               copy_location->set_end (next);
+                               copy_location->set_start (newframe);
+                       }
+                       
+               } else { // end marker
+                       
+                       if (move_both) {
+                               copy_location->set_end (newframe);
+                               copy_location->set_start (newframe - f_delta);
+                       } else if (newframe > copy_location->start()) {
+                               copy_location->set_end (newframe);
+                               
+                       } else if (newframe > 0) {
+                               snap_to (next, -1, true);
+                               copy_location->set_start (next);
+                               copy_location->set_end (newframe);
+                       }
                }
        }
 
@@ -2144,7 +2158,11 @@ Editor::marker_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
        Location * location = find_location_from_marker (marker, is_start);
        
        if (location) {
-               location->set (drag_info.copied_location->start(), drag_info.copied_location->end());
+               if (location->is_mark()) {
+                       location->set_start (drag_info.copied_location->start());
+               } else {
+                       location->set (drag_info.copied_location->start(), drag_info.copied_location->end());
+               }
        }
 
        session->add_redo_no_execute( session->locations()->get_memento() );
@@ -2538,7 +2556,8 @@ Editor::start_line_grab_from_regionview (ArdourCanvas::Item* item, GdkEvent* eve
 {
        switch (mouse_mode) {
        case MouseGain:
-               start_line_grab (clicked_regionview->get_gain_line(), event);
+               assert(dynamic_cast<AudioRegionView*>(clicked_regionview));
+               start_line_grab (dynamic_cast<AudioRegionView*>(clicked_regionview)->get_gain_line(), event);
                break;
        default:
                break;
@@ -2632,7 +2651,7 @@ Editor::line_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::start_region_grab (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       if (selection->audio_regions.empty() || clicked_regionview == 0) {
+       if (selection->regions.empty() || clicked_regionview == 0) {
                return;
        }
 
@@ -2646,13 +2665,13 @@ Editor::start_region_grab (ArdourCanvas::Item* item, GdkEvent* event)
 
        double speed = 1.0;
        TimeAxisView* tvp = clicked_trackview;
-       AudioTimeAxisView* tv = dynamic_cast<AudioTimeAxisView*>(tvp);
+       RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
 
        if (tv && tv->is_audio_track()) {
                speed = tv->get_diskstream()->speed();
        }
        
-       drag_info.last_frame_position = (jack_nframes_t) (clicked_regionview->region.position() / speed);
+       drag_info.last_frame_position = (jack_nframes_t) (clicked_regionview->region().position() / speed);
        drag_info.pointer_frame_offset = drag_info.grab_frame - drag_info.last_frame_position;
        drag_info.last_trackview = &clicked_regionview->get_time_axis_view();
        // we want a move threshold
@@ -2666,7 +2685,7 @@ Editor::start_region_grab (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::start_region_copy_grab (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       if (selection->audio_regions.empty() || clicked_regionview == 0) {
+       if (selection->regions.empty() || clicked_regionview == 0) {
                return;
        }
 
@@ -2677,7 +2696,7 @@ Editor::start_region_copy_grab (ArdourCanvas::Item* item, GdkEvent* event)
        start_grab(event);
 
        TimeAxisView* tv = &clicked_regionview->get_time_axis_view();
-       AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*>(tv);
+       RouteTimeAxisView* atv = dynamic_cast<RouteTimeAxisView*>(tv);
        double speed = 1.0;
 
        if (atv && atv->is_audio_track()) {
@@ -2685,7 +2704,7 @@ Editor::start_region_copy_grab (ArdourCanvas::Item* item, GdkEvent* event)
        }
        
        drag_info.last_trackview = &clicked_regionview->get_time_axis_view();
-       drag_info.last_frame_position = (jack_nframes_t) (clicked_regionview->region.position() / speed);
+       drag_info.last_frame_position = (jack_nframes_t) (clicked_regionview->region().position() / speed);
        drag_info.pointer_frame_offset = drag_info.grab_frame - drag_info.last_frame_position;
        // we want a move threshold
        drag_info.want_move_threshold = true;
@@ -2696,7 +2715,7 @@ Editor::start_region_copy_grab (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::start_region_brush_grab (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       if (selection->audio_regions.empty() || clicked_regionview == 0) {
+       if (selection->regions.empty() || clicked_regionview == 0) {
                return;
        }
 
@@ -2710,13 +2729,13 @@ Editor::start_region_brush_grab (ArdourCanvas::Item* item, GdkEvent* event)
 
        double speed = 1.0;
        TimeAxisView* tvp = clicked_trackview;
-       AudioTimeAxisView* tv = dynamic_cast<AudioTimeAxisView*>(tvp);
+       RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
 
        if (tv && tv->is_audio_track()) {
                speed = tv->get_diskstream()->speed();
        }
        
-       drag_info.last_frame_position = (jack_nframes_t) (clicked_regionview->region.position() / speed);
+       drag_info.last_frame_position = (jack_nframes_t) (clicked_regionview->region().position() / speed);
        drag_info.pointer_frame_offset = drag_info.grab_frame - drag_info.last_frame_position;
        drag_info.last_trackview = &clicked_regionview->get_time_axis_view();
        // we want a move threshold
@@ -2731,7 +2750,7 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
        double x_delta;
        double y_delta = 0;
-       AudioRegionView *rv = reinterpret_cast<AudioRegionView*> (drag_info.data); 
+       RegionView* rv = reinterpret_cast<RegionView*> (drag_info.data); 
        jack_nframes_t pending_region_position = 0;
        int32_t pointer_y_span = 0, canvas_pointer_y_span = 0, original_pointer_order;
        int32_t visible_y_high = 0, visible_y_low = 512;  //high meaning higher numbered.. not the height on the screen
@@ -2751,18 +2770,18 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
                
                /* duplicate the region(s) */
                
-               vector<AudioRegionView*> new_regionviews;
+               vector<RegionView*> new_regionviews;
                
                set<Playlist*> affected_playlists;
                pair<set<Playlist*>::iterator,bool> insert_result;
                
-               for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ++i) {
-                       AudioRegionView* rv;
+               for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ++i) {
+                       RegionView* rv;
                        
                        rv = (*i);
                        
-                       Playlist* to_playlist = rv->region.playlist();
-                       AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*>(&rv->get_time_axis_view());
+                       Playlist* to_playlist = rv->region().playlist();
+                       RouteTimeAxisView* atv = dynamic_cast<RouteTimeAxisView*>(&rv->get_time_axis_view());
                        
                        insert_result = affected_playlists.insert (to_playlist);
                        if (insert_result.second) {
@@ -2771,18 +2790,21 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
                        
                        latest_regionview = 0;
                        
-                       sigc::connection c = atv->view->AudioRegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
+                       sigc::connection c = atv->view()->RegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
                        
-                       /* create a new region with the same name.
-                        */
-                       
-                       AudioRegion* newregion = new AudioRegion (rv->region);
+                       /* create a new region with the same name. */
                        
+                       // FIXME: ew.  need a (virtual) Region::duplicate() or something?
+                       Region* newregion = NULL;
+                       if (dynamic_cast<AudioRegion*>(&rv->region()))
+                               newregion = new AudioRegion (dynamic_cast<AudioRegion&>(rv->region()));
+                       assert(newregion);
+
                        /* if the original region was locked, we don't care */
                        
                        newregion->set_locked (false);
                        
-                       to_playlist->add_region (*newregion, (jack_nframes_t) (rv->region.position() * atv->get_diskstream()->speed()));
+                       to_playlist->add_region (*newregion, (jack_nframes_t) (rv->region().position() * atv->get_diskstream()->speed()));
                        
                        c.disconnect ();
                        
@@ -2894,16 +2916,15 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
                        }
                }
 
-               for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ++i) {
-                       AudioRegionView* rv2;
-                       rv2 = (*i);
+               for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ++i) {
+                       RegionView* rv2 = (*i);
                        double ix1, ix2, iy1, iy2;
                        int32_t n = 0;
 
                        rv2->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
                        rv2->get_canvas_group()->i2w (ix1, iy1);
                        TimeAxisView* tvp2 = trackview_by_y_position (iy1);
-                       AudioTimeAxisView* atv2 = dynamic_cast<AudioTimeAxisView*>(tvp2);
+                       RouteTimeAxisView* atv2 = dynamic_cast<RouteTimeAxisView*>(tvp2);
 
                        if (atv2->order != original_pointer_order) {    
                                /* this isn't the pointer track */      
@@ -2998,8 +3019,8 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
            
                        pending_region_position = drag_info.current_pointer_frame - drag_info.pointer_frame_offset;
            
-                       sync_offset = rv->region.sync_offset (sync_dir);
-                       sync_frame = rv->region.adjust_to_sync (pending_region_position);
+                       sync_offset = rv->region().sync_offset (sync_dir);
+                       sync_frame = rv->region().adjust_to_sync (pending_region_position);
 
                        /* we snap if the snap modifier is not enabled.
                         */
@@ -3018,7 +3039,7 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
                        pending_region_position = 0;
                }
          
-               if (pending_region_position > max_frames - rv->region.length()) {
+               if (pending_region_position > max_frames - rv->region().length()) {
                        pending_region_position = drag_info.last_frame_position;
                }
          
@@ -3060,14 +3081,11 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
        } 
 
        if (x_delta < 0) {
-               for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ++i) {
+               for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ++i) {
 
-                       AudioRegionView* rv2;
-                       rv2 = (*i);
+                       RegionView* rv2 = (*i);
 
-                       /* if any regionview is at zero, we need to know so we can 
-                          stop further leftward motion.
-                       */
+                       // If any regionview is at zero, we need to know so we can stop further leftward motion.
                        
                        double ix1, ix2, iy1, iy2;
                        rv2->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
@@ -3085,12 +3103,11 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
        ************************************************************/
 
        pair<set<Playlist*>::iterator,bool> insert_result;
-       const list<AudioRegionView*>& layered_regions = selection->audio_regions.by_layer();
+       const list<RegionView*>& layered_regions = selection->regions.by_layer();
 
-       for (list<AudioRegionView*>::const_iterator i = layered_regions.begin(); i != layered_regions.end(); ++i) {
+       for (list<RegionView*>::const_iterator i = layered_regions.begin(); i != layered_regions.end(); ++i) {
            
-               AudioRegionView* rv;
-               rv = (*i);
+               RegionView* rv = (*i);
                double ix1, ix2, iy1, iy2;
                int32_t temp_pointer_y_span = pointer_y_span;
 
@@ -3171,8 +3188,8 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
                        if (-x_delta > ix1) {
                                x_delta = -ix1;
                        }
-               } else if ((x_delta > 0) &&(rv->region.last_frame() > max_frames - x_delta)) {
-                       x_delta = max_frames - rv->region.last_frame();
+               } else if ((x_delta > 0) &&(rv->region().last_frame() > max_frames - x_delta)) {
+                       x_delta = max_frames - rv->region().last_frame();
                }
                        
                if (drag_info.first_move) {
@@ -3197,7 +3214,7 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 
                        AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*> (&rv->get_time_axis_view());
                        if (atv && atv->is_audio_track()) {
-                               AudioPlaylist* pl = atv->get_diskstream()->playlist();
+                               AudioPlaylist* pl = dynamic_cast<AudioPlaylist*>(atv->get_diskstream()->playlist());
                                if (pl) {
                                        /* only freeze and capture state once */
 
@@ -3233,11 +3250,11 @@ void
 Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
        jack_nframes_t where;
-       AudioRegionView* rv = reinterpret_cast<AudioRegionView *> (drag_info.data);
+       RegionView* rv = reinterpret_cast<RegionView *> (drag_info.data);
        pair<set<Playlist*>::iterator,bool> insert_result;
        bool nocommit = true;
        double speed;
-       AudioTimeAxisView* atv;
+       RouteTimeAxisView* atv;
        bool regionview_y_movement;
        bool regionview_x_movement;
 
@@ -3271,7 +3288,7 @@ Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
                speed = atv->get_diskstream()->speed();
        }
        
-       regionview_x_movement = (drag_info.last_frame_position != (jack_nframes_t) (rv->region.position()/speed));
+       regionview_x_movement = (drag_info.last_frame_position != (jack_nframes_t) (rv->region().position()/speed));
        regionview_y_movement = (drag_info.last_trackview != &rv->get_time_axis_view());
 
        //printf ("last_frame: %s position is %lu  %g\n", rv->get_time_axis_view().name().c_str(), drag_info.last_frame_position, speed); 
@@ -3281,13 +3298,13 @@ Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
 
                /* motion between tracks */
 
-               list<AudioRegionView*> new_selection;
+               list<RegionView*> new_selection;
        
                /* moved to a different audio track. */
 
-               for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ) {
+               for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ) {
            
-                       AudioRegionView* rv2 = (*i);                
+                       RegionView* rv2 = (*i);             
            
                        /* the region that used to be in the old playlist is not
                           moved to the new one - we make a copy of it. as a result,
@@ -3304,7 +3321,7 @@ Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
 
                /* first, freeze the target tracks */
 
-               for (list<AudioRegionView*>::const_iterator i = new_selection.begin(); i != new_selection.end();i++ ) {
+               for (list<RegionView*>::const_iterator i = new_selection.begin(); i != new_selection.end();i++ ) {
 
                        Playlist* from_playlist;
                        Playlist* to_playlist;
@@ -3316,7 +3333,7 @@ Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
                        TimeAxisView* tvp2 = trackview_by_y_position (iy1);
                        AudioTimeAxisView* atv2 = dynamic_cast<AudioTimeAxisView*>(tvp2);
            
-                       from_playlist = (*i)->region.playlist();
+                       from_playlist = (*i)->region().playlist();
                        to_playlist = atv2->playlist();
 
                        /* the from_playlist was frozen in the "first_move" case 
@@ -3339,7 +3356,7 @@ Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
 
                /* now do it again with the actual operations */
 
-               for (list<AudioRegionView*>::const_iterator i = new_selection.begin(); i != new_selection.end();i++ ) {
+               for (list<RegionView*>::const_iterator i = new_selection.begin(); i != new_selection.end();i++ ) {
 
                        Playlist* from_playlist;
                        Playlist* to_playlist;
@@ -3351,17 +3368,17 @@ Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
                        TimeAxisView* tvp2 = trackview_by_y_position (iy1);
                        AudioTimeAxisView* atv2 = dynamic_cast<AudioTimeAxisView*>(tvp2);
            
-                       from_playlist = (*i)->region.playlist();
+                       from_playlist = (*i)->region().playlist();
                        to_playlist = atv2->playlist();
 
                        latest_regionview = 0;
            
                        where = (jack_nframes_t) (unit_to_frame (ix1) * speed);
-                       Region* new_region = createRegion ((*i)->region);
+                       Region* new_region = createRegion ((*i)->region());
 
-                       from_playlist->remove_region (&((*i)->region));
+                       from_playlist->remove_region (&((*i)->region()));
          
-                       sigc::connection c = atv2->view->AudioRegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
+                       sigc::connection c = atv2->view()->RegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
                        to_playlist->add_region (*new_region, where);
                        c.disconnect ();
                        
@@ -3374,11 +3391,11 @@ Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
 
                /* motion within a single track */
                
-               for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ++i) {
+               for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ++i) {
 
                        rv = (*i);
 
-                       if (rv->region.locked()) {
+                       if (rv->region().locked()) {
                                continue;
                        }
                        
@@ -3400,14 +3417,14 @@ Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
                                
                        } else {
                                
-                               where = rv->region.position();
+                               where = rv->region().position();
                        }
 
                        rv->get_time_axis_view().reveal_dependent_views (*rv);
 
                        /* no need to add an undo here, we did that when we added this playlist to motion_frozen playlists */
                        
-                       rv->region.set_position (where, (void *) this);
+                       rv->region().set_position (where, (void *) this);
                }
        }
 
@@ -3441,15 +3458,15 @@ Editor::region_view_item_click (AudioRegionView& rv, GdkEventButton* event)
 
                if (Keyboard::modifier_state_equals (event->state, Keyboard::ModifierMask (Keyboard::Control|Keyboard::Alt))) {
 
-                       align_region (rv.region, SyncPoint, (jack_nframes_t) (edit_cursor->current_frame * speed));
+                       align_region (rv.region(), SyncPoint, (jack_nframes_t) (edit_cursor->current_frame * speed));
 
                } else if (Keyboard::modifier_state_equals (event->state, Keyboard::ModifierMask (Keyboard::Control|Keyboard::Shift))) {
 
-                       align_region (rv.region, End, (jack_nframes_t) (edit_cursor->current_frame * speed));
+                       align_region (rv.region(), End, (jack_nframes_t) (edit_cursor->current_frame * speed));
 
                } else {
 
-                       align_region (rv.region, Start, (jack_nframes_t) (edit_cursor->current_frame * speed));
+                       align_region (rv.region(), Start, (jack_nframes_t) (edit_cursor->current_frame * speed));
                }
        }
 }
@@ -3566,7 +3583,7 @@ Editor::show_verbose_duration_cursor (jack_nframes_t start, jack_nframes_t end,
 }
 
 void
-Editor::collect_new_region_view (AudioRegionView* rv)
+Editor::collect_new_region_view (RegionView* rv)
 {
        latest_regionview = rv;
 }
@@ -3599,7 +3616,7 @@ Editor::start_selection_grab (ArdourCanvas::Item* item, GdkEvent* event)
        */
        
        latest_regionview = 0;
-       sigc::connection c = clicked_audio_trackview->view->AudioRegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
+       sigc::connection c = clicked_audio_trackview->view()->RegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
        
        /* A selection grab currently creates two undo/redo operations, one for 
           creating the new region and another for moving it.
@@ -3634,7 +3651,7 @@ Editor::start_selection_grab (ArdourCanvas::Item* item, GdkEvent* event)
        start_grab (event);
        
        drag_info.last_trackview = clicked_trackview;
-       drag_info.last_frame_position = latest_regionview->region.position();
+       drag_info.last_frame_position = latest_regionview->region().position();
        drag_info.pointer_frame_offset = drag_info.grab_frame - drag_info.last_frame_position;
        
        show_verbose_time_cursor (drag_info.last_frame_position, 10);
@@ -3875,9 +3892,9 @@ Editor::start_trim (ArdourCanvas::Item* item, GdkEvent* event)
                speed = tv->get_diskstream()->speed();
        }
        
-       jack_nframes_t region_start = (jack_nframes_t) (clicked_regionview->region.position() / speed);
-       jack_nframes_t region_end = (jack_nframes_t) (clicked_regionview->region.last_frame() / speed);
-       jack_nframes_t region_length = (jack_nframes_t) (clicked_regionview->region.length() / speed);
+       jack_nframes_t region_start = (jack_nframes_t) (clicked_regionview->region().position() / speed);
+       jack_nframes_t region_end = (jack_nframes_t) (clicked_regionview->region().last_frame() / speed);
+       jack_nframes_t region_length = (jack_nframes_t) (clicked_regionview->region().length() / speed);
 
        motion_frozen_playlists.clear();
        
@@ -3917,7 +3934,7 @@ Editor::start_trim (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::trim_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       AudioRegionView* rv = clicked_regionview;
+       RegionView* rv = clicked_regionview;
        jack_nframes_t frame_delta = 0;
        bool left_direction;
        bool obey_snap = !Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier());
@@ -3929,7 +3946,7 @@ Editor::trim_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 
        double speed = 1.0;
        TimeAxisView* tvp = clicked_trackview;
-       AudioTimeAxisView* tv = dynamic_cast<AudioTimeAxisView*>(tvp);
+       RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
        pair<set<Playlist*>::iterator,bool> insert_result;
 
        if (tv && tv->is_audio_track()) {
@@ -3968,11 +3985,14 @@ Editor::trim_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 
                begin_reversible_command (trim_type);
 
-               for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ++i) {
-                       (*i)->region.freeze ();
-                       (*i)->temporarily_hide_envelope ();
+               for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ++i) {
+                       (*i)->region().freeze ();
+               
+                       AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
+                       if (arv)
+                               arv->temporarily_hide_envelope ();
 
-                       Playlist * pl = (*i)->region.playlist();
+                       Playlist * pl = (*i)->region().playlist();
                        insert_result = motion_frozen_playlists.insert (pl);
                        if (insert_result.second) {
                                session->add_undo (pl->get_memento());
@@ -3988,20 +4008,20 @@ Editor::trim_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 
        switch (trim_op) {              
        case StartTrim:
-               if ((left_direction == false) && (drag_info.current_pointer_frame <= rv->region.first_frame()/speed)) {
+               if ((left_direction == false) && (drag_info.current_pointer_frame <= rv->region().first_frame()/speed)) {
                        break;
                 } else {
-                       for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ++i) {
+                       for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ++i) {
                                single_start_trim (**i, frame_delta, left_direction, obey_snap);
                        }
                        break;
                }
                
        case EndTrim:
-               if ((left_direction == true) && (drag_info.current_pointer_frame > (jack_nframes_t) (rv->region.last_frame()/speed))) {
+               if ((left_direction == true) && (drag_info.current_pointer_frame > (jack_nframes_t) (rv->region().last_frame()/speed))) {
                        break;
                } else {
-                       for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ++i) {
+                       for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ++i) {
                                single_end_trim (**i, frame_delta, left_direction, obey_snap);
                        }
                        break;
@@ -4015,8 +4035,8 @@ Editor::trim_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
                                swap_direction = true;
                        }
                        
-                       for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin();
-                            i != selection->audio_regions.by_layer().end(); ++i)
+                       for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin();
+                            i != selection->regions.by_layer().end(); ++i)
                        {
                                single_contents_trim (**i, frame_delta, left_direction, swap_direction, obey_snap);
                        }
@@ -4026,10 +4046,10 @@ Editor::trim_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 
        switch (trim_op) {
        case StartTrim:
-               show_verbose_time_cursor((jack_nframes_t) (rv->region.position()/speed), 10);   
+               show_verbose_time_cursor((jack_nframes_t) (rv->region().position()/speed), 10); 
                break;
        case EndTrim:
-               show_verbose_time_cursor((jack_nframes_t) (rv->region.last_frame()/speed), 10); 
+               show_verbose_time_cursor((jack_nframes_t) (rv->region().last_frame()/speed), 10);       
                break;
        case ContentsTrim:
                show_verbose_time_cursor(drag_info.current_pointer_frame, 10);  
@@ -4041,9 +4061,9 @@ Editor::trim_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 }
 
 void
-Editor::single_contents_trim (AudioRegionView& rv, jack_nframes_t frame_delta, bool left_direction, bool swap_direction, bool obey_snap)
+Editor::single_contents_trim (RegionView& rv, jack_nframes_t frame_delta, bool left_direction, bool swap_direction, bool obey_snap)
 {
-       Region& region (rv.region);
+       Region& region (rv.region());
 
        if (region.locked()) {
                return;
@@ -4053,7 +4073,7 @@ Editor::single_contents_trim (AudioRegionView& rv, jack_nframes_t frame_delta, b
 
        double speed = 1.0;
        TimeAxisView* tvp = clicked_trackview;
-       AudioTimeAxisView* tv = dynamic_cast<AudioTimeAxisView*>(tvp);
+       RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
 
        if (tv && tv->is_audio_track()) {
                speed = tv->get_diskstream()->speed();
@@ -4081,9 +4101,9 @@ Editor::single_contents_trim (AudioRegionView& rv, jack_nframes_t frame_delta, b
 }
 
 void
-Editor::single_start_trim (AudioRegionView& rv, jack_nframes_t frame_delta, bool left_direction, bool obey_snap)
+Editor::single_start_trim (RegionView& rv, jack_nframes_t frame_delta, bool left_direction, bool obey_snap)
 {
-       Region& region (rv.region);     
+       Region& region (rv.region());   
 
        if (region.locked()) {
                return;
@@ -4115,9 +4135,9 @@ Editor::single_start_trim (AudioRegionView& rv, jack_nframes_t frame_delta, bool
 }
 
 void
-Editor::single_end_trim (AudioRegionView& rv, jack_nframes_t frame_delta, bool left_direction, bool obey_snap)
+Editor::single_end_trim (RegionView& rv, jack_nframes_t frame_delta, bool left_direction, bool obey_snap)
 {
-       Region& region (rv.region);
+       Region& region (rv.region());
 
        if (region.locked()) {
                return;
@@ -4156,8 +4176,8 @@ Editor::trim_finished_callback (ArdourCanvas::Item* item, GdkEvent* event)
                        thaw_region_after_trim (*clicked_regionview);           
                } else {
                        
-                       for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin();
-                            i != selection->audio_regions.by_layer().end(); ++i)
+                       for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin();
+                            i != selection->regions.by_layer().end(); ++i)
                        {
                                thaw_region_after_trim (**i);
                        }
@@ -4180,7 +4200,7 @@ Editor::trim_finished_callback (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::point_trim (GdkEvent* event)
 {
-       AudioRegionView* rv = clicked_regionview;
+       RegionView* rv = clicked_regionview;
        jack_nframes_t new_bound = drag_info.current_pointer_frame;
 
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
@@ -4195,22 +4215,22 @@ Editor::point_trim (GdkEvent* event)
 
                if (rv->get_selected()) {
 
-                       for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin();
-                            i != selection->audio_regions.by_layer().end(); ++i)
+                       for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin();
+                            i != selection->regions.by_layer().end(); ++i)
                        {
-                               if (!(*i)->region.locked()) {
-                                       session->add_undo ((*i)->region.playlist()->get_memento());
-                                       (*i)->region.trim_front (new_bound, this);      
-                                       session->add_redo_no_execute ((*i)->region.playlist()->get_memento());
+                               if (!(*i)->region().locked()) {
+                                       session->add_undo ((*i)->region().playlist()->get_memento());
+                                       (*i)->region().trim_front (new_bound, this);    
+                                       session->add_redo_no_execute ((*i)->region().playlist()->get_memento());
                                }
                        }
 
                } else {
 
-                       if (!rv->region.locked()) {
-                               session->add_undo (rv->region.playlist()->get_memento());
-                               rv->region.trim_front (new_bound, this);        
-                               session->add_redo_no_execute (rv->region.playlist()->get_memento());
+                       if (!rv->region().locked()) {
+                               session->add_undo (rv->region().playlist()->get_memento());
+                               rv->region().trim_front (new_bound, this);      
+                               session->add_redo_no_execute (rv->region().playlist()->get_memento());
                        }
                }
 
@@ -4223,21 +4243,21 @@ Editor::point_trim (GdkEvent* event)
 
                if (rv->get_selected()) {
                        
-                       for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ++i)
+                       for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ++i)
                        {
-                               if (!(*i)->region.locked()) {
-                                       session->add_undo ((*i)->region.playlist()->get_memento());
-                                       (*i)->region.trim_end (new_bound, this);
-                                       session->add_redo_no_execute ((*i)->region.playlist()->get_memento());  
+                               if (!(*i)->region().locked()) {
+                                       session->add_undo ((*i)->region().playlist()->get_memento());
+                                       (*i)->region().trim_end (new_bound, this);
+                                       session->add_redo_no_execute ((*i)->region().playlist()->get_memento());        
                                }
                        }
 
                } else {
 
-                       if (!rv->region.locked()) {
-                               session->add_undo (rv->region.playlist()->get_memento());
-                               rv->region.trim_end (new_bound, this);
-                               session->add_redo_no_execute (rv->region.playlist()->get_memento());    
+                       if (!rv->region().locked()) {
+                               session->add_undo (rv->region().playlist()->get_memento());
+                               rv->region().trim_end (new_bound, this);
+                               session->add_redo_no_execute (rv->region().playlist()->get_memento());  
                        }
                }
 
@@ -4250,9 +4270,9 @@ Editor::point_trim (GdkEvent* event)
 }
 
 void
-Editor::thaw_region_after_trim (AudioRegionView& rv)
+Editor::thaw_region_after_trim (RegionView& rv)
 {
-       Region& region (rv.region);
+       Region& region (rv.region());
 
        if (region.locked()) {
                return;
@@ -4261,7 +4281,9 @@ Editor::thaw_region_after_trim (AudioRegionView& rv)
        region.thaw (_("trimmed region"));
        session->add_redo_no_execute (region.playlist()->get_memento());
 
-       rv.unhide_envelope ();
+       AudioRegionView* arv = dynamic_cast<AudioRegionView*>(&rv);
+       if (arv)
+               arv->unhide_envelope ();
 }
 
 void
@@ -4651,7 +4673,7 @@ Editor::end_rubberband_select (ArdourCanvas::Item* item, GdkEvent* event)
                }
                
        } else {
-               selection->clear_audio_regions();
+               selection->clear_regions();
                selection->clear_points ();
                selection->clear_lines ();
        }
@@ -4668,7 +4690,7 @@ Editor::mouse_rename_region (ArdourCanvas::Item* item, GdkEvent* event)
        ArdourPrompter prompter (false);
 
        prompter.set_prompt (_("Name for region:"));
-       prompter.set_initial_text (clicked_regionview->region.name());
+       prompter.set_initial_text (clicked_regionview->region().name());
        prompter.add_button (_("Rename"), Gtk::RESPONSE_ACCEPT);
        prompter.set_response_sensitive (Gtk::RESPONSE_ACCEPT, false);
        prompter.show_all ();
@@ -4677,7 +4699,7 @@ Editor::mouse_rename_region (ArdourCanvas::Item* item, GdkEvent* event)
         string str;
                prompter.get_result(str);
                if (str.length()) {
-               clicked_regionview->region.set_name (str);
+               clicked_regionview->region().set_name (str);
                }
                break;
        }
@@ -4699,7 +4721,7 @@ Editor::start_time_fx (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::time_fx_motion (ArdourCanvas::Item *item, GdkEvent* event)
 {
-       AudioRegionView* rv = clicked_regionview;
+       RegionView* rv = clicked_regionview;
 
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
                snap_to (drag_info.current_pointer_frame);
@@ -4709,8 +4731,8 @@ Editor::time_fx_motion (ArdourCanvas::Item *item, GdkEvent* event)
                return;
        }
 
-       if (drag_info.current_pointer_frame > rv->region.position()) {
-               rv->get_time_axis_view().show_timestretch (rv->region.position(), drag_info.current_pointer_frame);
+       if (drag_info.current_pointer_frame > rv->region().position()) {
+               rv->get_time_axis_view().show_timestretch (rv->region().position(), drag_info.current_pointer_frame);
        }
 
        drag_info.last_pointer_frame = drag_info.current_pointer_frame;
@@ -4728,21 +4750,25 @@ Editor::end_time_fx (ArdourCanvas::Item* item, GdkEvent* event)
                return;
        }
        
-       jack_nframes_t newlen = drag_info.last_pointer_frame - clicked_regionview->region.position();
-       float percentage = (float) ((double) newlen - (double) clicked_regionview->region.length()) / ((double) newlen) * 100.0f;
+       jack_nframes_t newlen = drag_info.last_pointer_frame - clicked_regionview->region().position();
+       float percentage = (float) ((double) newlen - (double) clicked_regionview->region().length()) / ((double) newlen) * 100.0f;
        
        begin_reversible_command (_("timestretch"));
 
-       if (run_timestretch (selection->audio_regions, percentage) == 0) {
+       if (run_timestretch (selection->regions, percentage) == 0) {
                session->commit_reversible_command ();
        }
 }
 
 void
-Editor::mouse_brush_insert_region (AudioRegionView* rv, jack_nframes_t pos)
+Editor::mouse_brush_insert_region (RegionView* rv, jack_nframes_t pos)
 {
        /* no brushing without a useful snap setting */
 
+       // FIXME
+       AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
+       assert(arv);
+
        switch (snap_mode) {
        case SnapMagnetic:
                return; /* can't work because it allows region to be placed anywhere */
@@ -4762,11 +4788,11 @@ Editor::mouse_brush_insert_region (AudioRegionView* rv, jack_nframes_t pos)
 
        /* don't brush a copy over the original */
        
-       if (pos == rv->region.position()) {
+       if (pos == rv->region().position()) {
                return;
        }
 
-       AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*>(&rv->get_time_axis_view());
+       RouteTimeAxisView* atv = dynamic_cast<RouteTimeAxisView*>(&arv->get_time_axis_view());
 
        if (atv == 0 || !atv->is_audio_track()) {
                return;
@@ -4776,7 +4802,7 @@ Editor::mouse_brush_insert_region (AudioRegionView* rv, jack_nframes_t pos)
        double speed = atv->get_diskstream()->speed();
        
        session->add_undo (playlist->get_memento());
-       playlist->add_region (*(new AudioRegion (rv->region)), (jack_nframes_t) (pos * speed));
+       playlist->add_region (*(new AudioRegion (arv->audio_region())), (jack_nframes_t) (pos * speed));
        session->add_redo_no_execute (playlist->get_memento());
        
        // playlist is frozen, so we have to update manually