change selection behaviour for track header context click
[ardour.git] / gtk2_ardour / editor_mouse.cc
index bf8b16c0d74517f10ac556ef40b565bf5e459f32..e9b71e4e859e604b2925028e46b3d7d59f5c4b03 100644 (file)
@@ -15,9 +15,9 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id$
 */
 
+#include <cassert>
 #include <cstdlib>
 #include <stdint.h>
 #include <cmath>
 
 #include <pbd/error.h>
 #include <gtkmm2ext/utils.h>
+#include <pbd/memento_command.h>
 
 #include "ardour_ui.h"
 #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"
@@ -47,7 +48,7 @@
 #include <ardour/types.h>
 #include <ardour/route.h>
 #include <ardour/audio_track.h>
-#include <ardour/diskstream.h>
+#include <ardour/audio_diskstream.h>
 #include <ardour/playlist.h>
 #include <ardour/audioplaylist.h>
 #include <ardour/audioregion.h>
 
 using namespace std;
 using namespace ARDOUR;
+using namespace PBD;
 using namespace sigc;
 using namespace Gtk;
 using namespace Editing;
 
-jack_nframes_t
+nframes_t
 Editor::event_frame (GdkEvent* event, double* pcx, double* pcy)
 {
        double cx, cy;
@@ -96,7 +98,6 @@ Editor::event_frame (GdkEvent* event, double* pcx, double* pcy)
                break;
        case GDK_KEY_PRESS:
        case GDK_KEY_RELEASE:
-               cerr << "here\n";
                // track_canvas.w2c(event->key.x, event->key.y, *pcx, *pcy);
                break;
        default:
@@ -168,7 +169,7 @@ Editor::set_mouse_mode (MouseMode m, bool force)
                return;
        }
 
-       if (m == mouse_mode && !force) {
+       if (!force && m == mouse_mode) {
                return;
        }
        
@@ -182,7 +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) {
@@ -196,7 +197,7 @@ Editor::set_mouse_mode (MouseMode m, bool force)
                */
 
                for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
-                       if ((*i)->selected()) {
+                       if ((*i)->get_selected()) {
                                (*i)->show_selection (selection->time);
                        }
                }
@@ -284,92 +285,116 @@ Editor::step_mouse_mode (bool next)
        }
 }
 
-bool
-Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
+void
+Editor::button_selection (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
 {
-       jack_nframes_t where = event_frame (event, 0, 0);
-
-       track_canvas.grab_focus();
-
-       if (session && session->actively_recording()) {
-               return true;
-       }
+       bool commit = false;
 
        /* in object/audition/timefx mode, any button press sets
           the selection if the object can be selected. this is a
           bit of hack, because we want to avoid this if the
           mouse operation is a region alignment.
+
+          note: not dbl-click or triple-click
        */
 
-       if (((mouse_mode == MouseObject) ||
-            (mouse_mode == MouseAudition && item_type == RegionItem) ||
-            (mouse_mode == MouseTimeFX && item_type == RegionItem)) &&
-           event->type == GDK_BUTTON_PRESS && 
-           event->button.button <= 3) {
+       if (((mouse_mode != MouseObject) &&
+            (mouse_mode != MouseAudition || item_type != RegionItem) &&
+            (mouse_mode != MouseTimeFX || item_type != RegionItem) &&
+            (mouse_mode != MouseRange)) ||
 
-               AudioRegionView* rv;
-               ControlPoint* cp;
+           (event->type != GDK_BUTTON_PRESS && event->type != GDK_BUTTON_RELEASE || event->button.button > 3)) {
+               
+               return;
+       }
 
-               /* not dbl-click or triple-click */
+       if (event->type == GDK_BUTTON_PRESS || event->type == GDK_BUTTON_RELEASE) {
 
-               switch (item_type) {
-               case RegionItem:
-                       set_selected_regionview_from_click (Keyboard::selection_type (event->button.state), true);
-                       break;
+               if ((event->button.state & Keyboard::RelevantModifierKeyMask) && event->button.button != 1) {
                        
-               case AudioRegionViewNameHighlight:
-               case AudioRegionViewName:
-                       if ((rv = static_cast<AudioRegionView *> (item->get_data ("regionview"))) != 0) {
-                               set_selected_regionview_from_click (Keyboard::selection_type (event->button.state), true);
-                       }
-                       break;
-                       
-               case GainAutomationControlPointItem:
-               case PanAutomationControlPointItem:
-               case RedirectAutomationControlPointItem:
-                       if ((cp = static_cast<ControlPoint *> (item->get_data ("control_point"))) != 0) {
-                               set_selected_control_point_from_click (Keyboard::selection_type (event->button.state), false);
+                       /* almost no selection action on modified button-2 or button-3 events */
+               
+                       if (item_type != RegionItem && event->button.button != 2) {
+                               return;
                        }
-                       break;
-
-               case StreamItem:
-                       set_selected_track_from_click (Keyboard::selection_type (event->button.state), true, true);
-                       break;
-
-               case AutomationTrackItem:
-                       break;
-
-               default:
-                       break;
                }
        }
+           
+       Selection::Operation op = Keyboard::selection_type (event->button.state);
+       bool press = (event->type == GDK_BUTTON_PRESS);
 
-#define SELECT_TRACK_FROM_CANVAS_IN_RANGE_MODE
-#ifdef  SELECT_TRACK_FROM_CANVAS_IN_RANGE_MODE
-       /* in range mode, button 1/2/3 press potentially selects a track */
+       begin_reversible_command (_("select on click"));
 
-       if (mouse_mode == MouseRange && 
-           event->type == GDK_BUTTON_PRESS && 
-           event->button.button <= 3) {
+       switch (item_type) {
+       case RegionItem:
+               if (mouse_mode != MouseRange) {
+                       commit = set_selected_regionview_from_click (press, op, true);
+               } else if (event->type == GDK_BUTTON_PRESS) {
+                       commit = set_selected_track_from_click (press, op, false);
+               }
+               break;
                
-               AudioRegionView* rv;
-
-               switch (item_type) {
-               case StreamItem:
-               case RegionItem:
-               case AutomationTrackItem:
-                       set_selected_track_from_click (Keyboard::selection_type (event->button.state), true, true);
-                       break;
+       case RegionViewNameHighlight:
+       case RegionViewName:
+               if (mouse_mode != MouseRange) {
+                       commit = set_selected_regionview_from_click (press, op, true);
+               } else if (event->type == GDK_BUTTON_PRESS) {
+                       commit = set_selected_track_from_click (press, op, false);
+               }
+               break;
 
-               case AudioRegionViewNameHighlight:
-               case AudioRegionViewName:
-                       rv = reinterpret_cast<AudioRegionView *> (item->get_data ("regionview"));
-               default:
-                       break;
+       case FadeInHandleItem:
+       case FadeInItem:
+       case FadeOutHandleItem:
+       case FadeOutItem:
+               if (mouse_mode != MouseRange) {
+                       commit = set_selected_regionview_from_click (press, op, true);
+               } else if (event->type == GDK_BUTTON_PRESS) {
+                       commit = set_selected_track_from_click (press, op, false);
+               }
+               break;
+               
+       case GainAutomationControlPointItem:
+       case PanAutomationControlPointItem:
+       case RedirectAutomationControlPointItem:
+               if (mouse_mode != MouseRange) {
+                       commit = set_selected_control_point_from_click (op, false);
+               }
+               break;
+               
+       case StreamItem:
+               /* for context click or range selection, select track */
+               if (event->button.button == 3) {
+                       commit = set_selected_track_from_click (press, op, true);
+               } else if (event->type == GDK_BUTTON_PRESS && mouse_mode == MouseRange) {
+                       commit = set_selected_track_from_click (press, op, false);
                }
+               break;
+                   
+       case AutomationTrackItem:
+               commit = set_selected_track_from_click (press, op, true);
+               break;
+               
+       default:
+               break;
+       }
+       
+       if (commit) {
+               commit_reversible_command ();
+       }
+}
+
+bool
+Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
+{
+       track_canvas.grab_focus();
+
+       if (session && session->actively_recording()) {
+               return true;
        }
-#endif
 
+       button_selection (item, event, item_type);
+       
        if (drag_info.item == 0 &&
            (Keyboard::is_delete_event (&event->button) ||
             Keyboard::is_context_menu_event (&event->button) ||
@@ -435,6 +460,7 @@ Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemTyp
                                start_range_markerbar_op (item, event, CreateRangeMarker); 
                                return true;
                                break;
+
                        case TransportMarkerBarItem:
                                start_range_markerbar_op (item, event, CreateTransportMarker); 
                                return true;
@@ -479,10 +505,9 @@ Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemTyp
                        break;
                        
                case MouseObject:
-                       if (Keyboard::modifier_state_contains (event->button.state, 
-                                                              Keyboard::ModifierMask(Keyboard::Control|Keyboard::Alt))
-                               && event->type == GDK_BUTTON_PRESS) {
-
+                       if (Keyboard::modifier_state_contains (event->button.state, Keyboard::ModifierMask(Keyboard::Control|Keyboard::Alt)) &&
+                           event->type == GDK_BUTTON_PRESS) {
+                               
                                start_rubberband_select (item, event);
 
                        } else if (event->type == GDK_BUTTON_PRESS) {
@@ -506,12 +531,12 @@ 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;
@@ -564,6 +589,10 @@ Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemTyp
                                        break ;
                                /* </CMT Additions> */
 
+                               case MarkerBarItem:
+                                       
+                                       break;
+
                                default:
                                        break;
                                }
@@ -673,12 +702,12 @@ 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;
@@ -715,79 +744,6 @@ Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemTyp
        case 3:
                break;
 
-       case 4:
-               switch (mouse_mode) {
-               case MouseZoom:
-                       //temporal_zoom_to_frame (true, where);
-                       if (Keyboard::modifier_state_equals (event->button.state, Keyboard::Control)) {
-                               temporal_zoom_to_frame (true, where);
-                       }
-                       else {
-                               temporal_zoom_step (true);
-                       }
-                       break;
-               default:
-                       
-                       if (Keyboard::modifier_state_contains (event->button.state, Keyboard::ModifierMask(Keyboard::Alt))) {
-                               scroll_backward (0.6f);
-                               return true;
-                       }
-                       else if (Keyboard::no_modifier_keys_pressed (&event->button)) {
-                               scroll_tracks_up_line ();
-                       } else {
-                               if (Keyboard::modifier_state_equals (event->button.state, Keyboard::Shift)) {
-                                       if (clicked_trackview) {
-                                               if (!current_stepping_trackview) {
-                                                 step_timeout = Glib::signal_timeout().connect (mem_fun(*this, &Editor::track_height_step_timeout), 500);
-                                                       current_stepping_trackview = clicked_trackview;
-                                               }
-                                               gettimeofday (&last_track_height_step_timestamp, 0);
-                                               current_stepping_trackview->step_height (true);
-                                       }
-                               }
-                               else if (Keyboard::modifier_state_equals (event->button.state, Keyboard::Control)) {
-                                       temporal_zoom_to_frame (true, where);
-                               }
-                       }
-               }
-               break;
-
-       case 5:
-               switch (mouse_mode) {
-               case MouseZoom:
-                       // temporal_zoom_to_frame (false, where);
-                       if (Keyboard::modifier_state_equals (event->button.state, Keyboard::Control)) {
-                               temporal_zoom_to_frame (false, where);
-                       }
-                       else {
-                               temporal_zoom_step (false);
-                       }
-                       break;
-               default:
-
-                       if (Keyboard::modifier_state_contains (event->button.state, Keyboard::ModifierMask(Keyboard::Alt))) {
-                               scroll_forward (0.6f);
-                               return true;
-                       }
-                       else if (Keyboard::no_modifier_keys_pressed (&event->button)) {
-                               scroll_tracks_down_line ();
-                       } else {
-                               if (Keyboard::modifier_state_equals (event->button.state, Keyboard::Shift)) {
-                                       if (clicked_trackview) {
-                                               if (!current_stepping_trackview) {
-                                                 step_timeout = Glib::signal_timeout().connect (mem_fun(*this, &Editor::track_height_step_timeout), 500);
-                                                       current_stepping_trackview = clicked_trackview;
-                                               }
-                                               gettimeofday (&last_track_height_step_timestamp, 0);
-                                               current_stepping_trackview->step_height (false);
-                                       }
-                               } else if (Keyboard::modifier_state_equals (event->button.state, Keyboard::Control)) {
-                                       temporal_zoom_to_frame (false, where);
-                               }
-                       }
-               }
-               break;
-
        default:
                break;
 
@@ -799,7 +755,7 @@ Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemTyp
 bool
 Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
 {
-       jack_nframes_t where = event_frame (event, 0, 0);
+       nframes_t where = event_frame (event, 0, 0);
 
        /* no action if we're recording */
                                                
@@ -816,6 +772,8 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
                }
        }
        
+       button_selection (item, event, item_type);
+
        /* edit events get handled here */
        
        if (drag_info.item == 0 && Keyboard::is_edit_event (&event->button)) {
@@ -832,7 +790,7 @@ 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);
                        }
@@ -867,8 +825,8 @@ 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;
                                
@@ -1026,9 +984,13 @@ 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;
                                
@@ -1104,28 +1066,6 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
        return false;
 }
 
-void
-Editor::maybe_autoscroll (GdkEvent* event)
-{
-       jack_nframes_t rightmost_frame = leftmost_frame + current_page_frames();
-
-       jack_nframes_t frame = drag_info.current_pointer_frame;
-
-       cerr << "maybe autoscroll @ " << frame << " left = " << leftmost_frame << " right = " << rightmost_frame << endl;
-
-       if (frame > rightmost_frame) {
-               if (rightmost_frame < max_frames) {
-                       autoscroll_direction = 1;
-                       autoscroll_canvas ();
-               }
-       } else if (frame < leftmost_frame) {
-               if (leftmost_frame > 0) {
-                       autoscroll_direction = -1;
-                       autoscroll_canvas ();
-               }
-       } 
-}
-
 bool
 Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
 {
@@ -1160,23 +1100,25 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_
        case GainAutomationControlPointItem:
        case PanAutomationControlPointItem:
        case RedirectAutomationControlPointItem:
-               cp = static_cast<ControlPoint*>(item->get_data ("control_point"));
-               cp->set_visible (true);
-               
-               double at_x, at_y;
-               at_x = cp->get_x();
-               at_y = cp->get_y ();
-               cp->item->i2w (at_x, at_y);
-               at_x += 20.0;
-               at_y += 20.0;
-
-               fraction = 1.0 - (cp->get_y() / cp->line.height());
-       
-               set_verbose_canvas_cursor (cp->line.get_verbose_cursor_string (fraction), at_x, at_y);
-               show_verbose_canvas_cursor ();
-               
-               if (is_drawable()) {
-                       track_canvas.get_window()->set_cursor (*fader_cursor);
+               if (mouse_mode == MouseGain || mouse_mode == MouseObject) {
+                       cp = static_cast<ControlPoint*>(item->get_data ("control_point"));
+                       cp->set_visible (true);
+
+                       double at_x, at_y;
+                       at_x = cp->get_x();
+                       at_y = cp->get_y ();
+                       cp->item->i2w (at_x, at_y);
+                       at_x += 20.0;
+                       at_y += 20.0;
+
+                       fraction = 1.0 - (cp->get_y() / cp->line.height());
+
+                       set_verbose_canvas_cursor (cp->line.get_verbose_cursor_string (fraction), at_x, at_y);
+                       show_verbose_canvas_cursor ();
+
+                       if (is_drawable()) {
+                               track_canvas.get_window()->set_cursor (*fader_cursor);
+                       }
                }
                break;
                
@@ -1194,17 +1136,19 @@ Editor::enter_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_
        case GainAutomationLineItem:
        case RedirectAutomationLineItem:
        case PanAutomationLineItem:
-               {
-                       ArdourCanvas::Line *line = dynamic_cast<ArdourCanvas::Line *> (item);
-                       if (line)
-                               line->property_fill_color_rgba() = color_map[cEnteredAutomationLine];
-               }
-               if (is_drawable()) {
-                       track_canvas.get_window()->set_cursor (*fader_cursor);
+               if (mouse_mode == MouseGain || mouse_mode == MouseObject) {
+                       {
+                               ArdourCanvas::Line *line = dynamic_cast<ArdourCanvas::Line *> (item);
+                               if (line)
+                                       line->property_fill_color_rgba() = color_map[cEnteredAutomationLine];
+                       }
+                       if (is_drawable()) {
+                               track_canvas.get_window()->set_cursor (*fader_cursor);
+                       }
                }
                break;
                
-       case AudioRegionViewNameHighlight:
+       case RegionViewNameHighlight:
                if (is_drawable() && mouse_mode == MouseObject) {
                        track_canvas.get_window()->set_cursor (*trimmer_cursor);
                }
@@ -1231,11 +1175,11 @@ 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);
                        }
@@ -1340,7 +1284,7 @@ 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) {
@@ -1362,7 +1306,7 @@ 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:
@@ -1393,9 +1337,9 @@ 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);
                        }
@@ -1430,7 +1374,7 @@ 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) {
@@ -1497,14 +1441,18 @@ Editor::motion_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item
                                                       &drag_info.current_pointer_y);
 
        if (!from_autoscroll && drag_info.item) {
-               /* item != 0 is the best test i can think of for 
-                  dragging.
+               /* item != 0 is the best test i can think of for dragging.
                */
-               if (!drag_info.move_threshold_passsed) {
-                       drag_info.move_threshold_passsed = (abs ((int) (drag_info.current_pointer_x - drag_info.grab_x)) > 4);
+               if (!drag_info.move_threshold_passed) {
+
+                       bool x_threshold_passed =  (abs ((int) (drag_info.current_pointer_x - drag_info.grab_x)) > 4);
+                       bool y_threshold_passed =  (abs ((int) (drag_info.current_pointer_y - drag_info.grab_y)) > 4);
+
+                       drag_info.move_threshold_passed = (x_threshold_passed || y_threshold_passed);
                        
                        // and change the initial grab loc/frame if this drag info wants us to
-                       if (drag_info.want_move_threshold && drag_info.move_threshold_passsed) {
+
+                       if (drag_info.want_move_threshold && drag_info.move_threshold_passed) {
                                drag_info.grab_frame = drag_info.current_pointer_frame;
                                drag_info.grab_x = drag_info.current_pointer_x;
                                drag_info.grab_y = drag_info.current_pointer_y;
@@ -1524,7 +1472,7 @@ 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:
@@ -1576,6 +1524,7 @@ Editor::motion_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item
 
   handled:
        track_canvas_motion (event);
+       // drag_info.last_pointer_frame = drag_info.current_pointer_frame;
        return true;
        
   not_handled:
@@ -1618,7 +1567,7 @@ Editor::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
        drag_info.cumulative_x_drag = 0;
        drag_info.cumulative_y_drag = 0;
        drag_info.first_move = true;
-       drag_info.move_threshold_passsed = false;
+       drag_info.move_threshold_passed = false;
        drag_info.want_move_threshold = false;
        drag_info.pointer_frame_offset = 0;
        drag_info.brushing = false;
@@ -1646,6 +1595,19 @@ Editor::start_grab (GdkEvent* event, Gdk::Cursor *cursor)
        }
 }
 
+void
+Editor::swap_grab (ArdourCanvas::Item* new_item, Gdk::Cursor* cursor, uint32_t time)
+{
+       drag_info.item->ungrab (0);
+       drag_info.item = new_item;
+
+       if (cursor == 0) {
+               cursor = grabber_cursor;
+       }
+
+       drag_info.item->grab (Gdk::POINTER_MOTION_MASK|Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK, *cursor, time);
+}
+
 bool
 Editor::end_grab (ArdourCanvas::Item* item, GdkEvent* event)
 {
@@ -1689,7 +1651,7 @@ Editor::end_grab (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::set_edit_cursor (GdkEvent* event)
 {
-       jack_nframes_t pointer_frame = event_frame (event);
+       nframes_t pointer_frame = event_frame (event);
 
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
                if (snap_type != SnapToEditCursor) {
@@ -1704,7 +1666,7 @@ Editor::set_edit_cursor (GdkEvent* event)
 void
 Editor::set_playhead_cursor (GdkEvent* event)
 {
-       jack_nframes_t pointer_frame = event_frame (event);
+       nframes_t pointer_frame = event_frame (event);
 
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
                snap_to (pointer_frame);
@@ -1731,17 +1693,17 @@ 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 - ((nframes_t) arv->audio_region()->fade_in().back()->when + arv->region()->position());  
 }
 
 void
 Editor::fade_in_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
        AudioRegionView* arv = static_cast<AudioRegionView*>(drag_info.data);
-       jack_nframes_t pos;
-       jack_nframes_t fade_length;
+       nframes_t pos;
+       nframes_t fade_length;
 
-       if ((long)drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
+       if ((int32_t)drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
                pos = drag_info.current_pointer_frame - drag_info.pointer_frame_offset;
        }
        else {
@@ -1751,18 +1713,28 @@ Editor::fade_in_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
                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();
+       }               
+       /* mapover the region selection */
+
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+
+               AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (*i);
+               
+               if (!tmp) {
+                       continue;
+               }
        
-       arv->reset_fade_in_shape_width (fade_length);
+               tmp->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;
 }
@@ -1770,39 +1742,46 @@ Editor::fade_in_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::fade_in_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       if (drag_info.first_move) return;
-
        AudioRegionView* arv = static_cast<AudioRegionView*>(drag_info.data);
-       jack_nframes_t pos;
-       jack_nframes_t fade_length;
+       nframes_t pos;
+       nframes_t fade_length;
 
-       if ((long)drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
+       if (drag_info.first_move) return;
+
+       if ((int32_t)drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
                pos = drag_info.current_pointer_frame - drag_info.pointer_frame_offset;
-       }
-       else {
+       } else {
                pos = 0;
        }
 
-       if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
-               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 {
+               fade_length = pos - arv->region()->position();
        }
-       else if (pos > arv->region.last_frame()) {
-               fade_length = arv->region.length();
-       }
-       else {
-               fade_length = pos - arv->region.position();
+               
+       begin_reversible_command (_("change fade in length"));
+
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+
+               AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (*i);
+               
+               if (!tmp) {
+                       continue;
+               }
+       
+               AutomationList& alist = tmp->audio_region()->fade_in();
+               XMLNode &before = alist.get_state();
+
+               tmp->audio_region()->set_fade_in_length (fade_length);
+               
+               XMLNode &after = alist.get_state();
+               session->add_command(new MementoCommand<AutomationList>(alist, &before, &after));
        }
 
-       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());
        commit_reversible_command ();
-       fade_in_drag_motion_callback (item, event);
 }
 
 void
@@ -1821,15 +1800,15 @@ 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() - (nframes_t) arv->audio_region()->fade_out().back()->when + arv->region()->position());       
 }
 
 void
 Editor::fade_out_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
        AudioRegionView* arv = static_cast<AudioRegionView*>(drag_info.data);
-       jack_nframes_t pos;
-       jack_nframes_t fade_length;
+       nframes_t pos;
+       nframes_t fade_length;
 
        if ((long)drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
                pos = drag_info.current_pointer_frame - drag_info.pointer_frame_offset;
@@ -1841,20 +1820,31 @@ Editor::fade_out_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
                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;
        }
+               
+       /* mapover the region selection */
+
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+
+               AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (*i);
+               
+               if (!tmp) {
+                       continue;
+               }
        
-       arv->reset_fade_out_shape_width (fade_length);
+               tmp->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;
 }
@@ -1865,8 +1855,8 @@ Editor::fade_out_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* eve
        if (drag_info.first_move) return;
 
        AudioRegionView* arv = static_cast<AudioRegionView*>(drag_info.data);
-       jack_nframes_t pos;
-       jack_nframes_t fade_length;
+       nframes_t pos;
+       nframes_t fade_length;
 
        if ((long)drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
                pos = drag_info.current_pointer_frame - drag_info.pointer_frame_offset;
@@ -1879,23 +1869,36 @@ 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());
-       commit_reversible_command ();
 
-       fade_out_drag_motion_callback (item, event);
+       for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
+
+               AudioRegionView* tmp = dynamic_cast<AudioRegionView*> (*i);
+               
+               if (!tmp) {
+                       continue;
+               }
+       
+               AutomationList& alist = tmp->audio_region()->fade_out();
+               XMLNode &before = alist.get_state();
+               
+               tmp->audio_region()->set_fade_out_length (fade_length);
+
+               XMLNode &after = alist.get_state();
+               session->add_command(new MementoCommand<AutomationList>(alist, &before, &after));
+       }
+
+       commit_reversible_command ();
 }
 
 void
@@ -1914,8 +1917,10 @@ Editor::start_cursor_grab (ArdourCanvas::Item* item, GdkEvent* event)
 
        Cursor* cursor = (Cursor *) drag_info.data;
 
-       if (session && cursor == playhead_cursor) {
-               if (drag_info.was_rolling) {
+       if (cursor == playhead_cursor) {
+               _dragging_playhead = true;
+               
+               if (session && drag_info.was_rolling) {
                        session->request_stop ();
                } 
        }
@@ -1929,7 +1934,7 @@ void
 Editor::cursor_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
        Cursor* cursor = (Cursor *) drag_info.data;
-       jack_nframes_t adjusted_frame;
+       nframes_t adjusted_frame;
        
        if ((long)drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
                adjusted_frame = drag_info.current_pointer_frame - drag_info.pointer_frame_offset;
@@ -1950,6 +1955,8 @@ Editor::cursor_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
        
        if (cursor == edit_cursor) {
                edit_cursor_clock.set (cursor->current_frame);
+       } else {
+               UpdateAllTransportClocks (cursor->current_frame);
        }
 
        show_verbose_time_cursor (cursor->current_frame, 10);
@@ -1964,6 +1971,8 @@ Editor::cursor_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
        if (drag_info.first_move) return;
        
        cursor_drag_motion_callback (item, event);
+
+       _dragging_playhead = false;
        
        if (item == &playhead_cursor->canvas_item) {
                if (session) {
@@ -2015,7 +2024,7 @@ 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()) {
@@ -2034,28 +2043,31 @@ Editor::start_marker_grab (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::marker_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       jack_nframes_t f_delta; 
+       nframes_t f_delta;      
        Marker* marker = (Marker *) drag_info.data;
        Location  *real_location;
        Location  *copy_location;
        bool is_start;
        bool move_both = false;
 
-       jack_nframes_t newframe;
+
+       nframes_t newframe;
        if (drag_info.pointer_frame_offset <= (long) drag_info.current_pointer_frame) {
                newframe = drag_info.current_pointer_frame - drag_info.pointer_frame_offset;
        }
        else {
                newframe = 0;
        }
-               
-       jack_nframes_t next = newframe;
+
+       nframes_t next = newframe;
 
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
                snap_to (newframe, 0, true);
        }
        
-       if (drag_info.current_pointer_frame == drag_info.last_pointer_frame) return;
+       if (drag_info.current_pointer_frame == drag_info.last_pointer_frame) { 
+               return;
+       }
 
        /* call this to find out if its the start or end */
        
@@ -2071,31 +2083,39 @@ 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);
+                       }
                }
        }
 
@@ -2122,17 +2142,21 @@ Editor::marker_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
        bool is_start;
 
 
-
        begin_reversible_command ( _("move marker") );
-       session->add_undo( session->locations()->get_memento() );
+       XMLNode &before = session->locations()->get_state();
        
        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() );
+       XMLNode &after = session->locations()->get_state();
+       session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
        commit_reversible_command ();
        
        marker_drag_line->hide();
@@ -2207,7 +2231,7 @@ void
 Editor::meter_marker_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
        MeterMarker* marker = (MeterMarker *) drag_info.data;
-       jack_nframes_t adjusted_frame;
+       nframes_t adjusted_frame;
 
        if ((long)drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
                adjusted_frame = drag_info.current_pointer_frame - drag_info.pointer_frame_offset;
@@ -2246,9 +2270,10 @@ Editor::meter_marker_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent*
        
        if (drag_info.copy == true) {
                begin_reversible_command (_("copy meter mark"));
-               session->add_undo (map.get_memento());
+                XMLNode &before = map.get_state();
                map.add_meter (marker->meter(), when);
-               session->add_redo_no_execute (map.get_memento());
+               XMLNode &after = map.get_state();
+                session->add_command(new MementoCommand<TempoMap>(map, &before, &after));
                commit_reversible_command ();
                
                // delete the dummy marker we used for visual representation of copying.
@@ -2256,9 +2281,10 @@ Editor::meter_marker_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent*
                delete marker;
        } else {
                begin_reversible_command (_("move meter mark"));
-               session->add_undo (map.get_memento());
+               XMLNode &before = map.get_state();
                map.move_meter (marker->meter(), when);
-               session->add_redo_no_execute (map.get_memento());
+               XMLNode &after = map.get_state();
+                session->add_command(new MementoCommand<TempoMap>(map, &before, &after));
                commit_reversible_command ();
        }
 }
@@ -2336,7 +2362,7 @@ void
 Editor::tempo_marker_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
        TempoMarker* marker = (TempoMarker *) drag_info.data;
-       jack_nframes_t adjusted_frame;
+       nframes_t adjusted_frame;
        
        if ((long)drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
                adjusted_frame = drag_info.current_pointer_frame - drag_info.pointer_frame_offset;
@@ -2373,12 +2399,13 @@ Editor::tempo_marker_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent*
        
        TempoMap& map (session->tempo_map());
        map.bbt_time (drag_info.last_pointer_frame, when);
-       
+
        if (drag_info.copy == true) {
                begin_reversible_command (_("copy tempo mark"));
-               session->add_undo (map.get_memento());
+               XMLNode &before = map.get_state();
                map.add_tempo (marker->tempo(), when);
-               session->add_redo_no_execute (map.get_memento());
+               XMLNode &after = map.get_state();
+               session->add_command (new MementoCommand<TempoMap>(map, &before, &after));
                commit_reversible_command ();
                
                // delete the dummy marker we used for visual representation of copying.
@@ -2386,9 +2413,10 @@ Editor::tempo_marker_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent*
                delete marker;
        } else {
                begin_reversible_command (_("move tempo mark"));
-               session->add_undo (map.get_memento());
+                XMLNode &before = map.get_state();
                map.move_tempo (marker->tempo(), when);
-               session->add_redo_no_execute (map.get_memento());
+                XMLNode &after = map.get_state();
+                session->add_command (new MementoCommand<TempoMap>(map, &before, &after));
                commit_reversible_command ();
        }
 }
@@ -2442,7 +2470,7 @@ Editor::start_control_point_grab (ArdourCanvas::Item* item, GdkEvent* event)
 
        start_grab (event, fader_cursor);
 
-       control_point->line.start_drag (control_point, 0);
+       control_point->line.start_drag (control_point, drag_info.grab_frame, 0);
 
        float fraction = 1.0 - (control_point->get_y() / control_point->line.height());
        set_verbose_canvas_cursor (control_point->line.get_verbose_cursor_string (fraction), 
@@ -2476,7 +2504,7 @@ Editor::control_point_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent*
        cy = min ((double) cp->line.height(), cy);
 
        //translate cx to frames
-       jack_nframes_t cx_frames = unit_to_frame (cx);
+       nframes_t cx_frames = unit_to_frame (cx);
 
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier()) && !drag_info.x_constrained) {
                snap_to (cx_frames);
@@ -2523,7 +2551,8 @@ 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;
@@ -2548,7 +2577,7 @@ Editor::start_line_grab (AutomationLine* line, GdkEvent* event)
 {
        double cx;
        double cy;
-       jack_nframes_t frame_within_region;
+       nframes_t frame_within_region;
 
        /* need to get x coordinate in terms of parent (TimeAxisItemView)
           origin.
@@ -2557,7 +2586,7 @@ Editor::start_line_grab (AutomationLine* line, GdkEvent* event)
        cx = event->button.x;
        cy = event->button.y;
        line->parent_group().w2i (cx, cy);
-       frame_within_region = (jack_nframes_t) floor (cx * frames_per_unit);
+       frame_within_region = (nframes_t) floor (cx * frames_per_unit);
 
        if (!line->control_points_adjacent (frame_within_region, current_line_drag_info.before, 
                                            current_line_drag_info.after)) {
@@ -2574,7 +2603,7 @@ Editor::start_line_grab (AutomationLine* line, GdkEvent* event)
 
        double fraction = 1.0 - (cy / line->height());
 
-       line->start_drag (0, fraction);
+       line->start_drag (0, drag_info.grab_frame, fraction);
        
        set_verbose_canvas_cursor (line->get_verbose_cursor_string (fraction),
                                   drag_info.current_pointer_x + 20, drag_info.current_pointer_y + 20);
@@ -2617,7 +2646,7 @@ 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;
        }
 
@@ -2631,13 +2660,13 @@ 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 = (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
@@ -2651,77 +2680,18 @@ 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;
        }
 
-       /* this is committed in the grab finished callback. */
-
-       begin_reversible_command (_("Drag region copy"));
-
-       /* duplicate the region(s) */
-       
-       vector<AudioRegionView*> 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;
-               
-               rv = (*i);
-               
-               Playlist* to_playlist = rv->region.playlist();
-               AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*>(&rv->get_time_axis_view());
-               
-               insert_result = affected_playlists.insert (to_playlist);
-               if (insert_result.second) {
-                       session->add_undo (to_playlist->get_memento ());
-               }
-               
-               latest_regionview = 0;
-               
-               sigc::connection c = atv->view->AudioRegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
-               
-               /* create a new region with the same name.
-                */
-               
-               AudioRegion* newregion = new AudioRegion (rv->region);
-               
-               /* 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()));
-               
-               c.disconnect ();
-               
-               if (latest_regionview) {
-                       new_regionviews.push_back (latest_regionview);
-               }
-       }
-       
-       if (new_regionviews.empty()) {
-               return;
-       }
-       
-       /* reset selection to new regionviews */
-       
-       selection->set (new_regionviews);
-       
-       /* reset drag_info data to reflect the fact that we are dragging the copies */
-       
-       drag_info.data = new_regionviews.front();
-       drag_info.item = new_regionviews.front()->get_canvas_group ();
-       
        drag_info.copy = true;
-       drag_info.motion_callback = &Editor::region_drag_motion_callback;
-       drag_info.finished_callback = &Editor::region_drag_finished_callback;
+       drag_info.item = item;
+       drag_info.data = clicked_regionview;    
 
        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()) {
@@ -2729,20 +2699,19 @@ 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 = (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;
-
+       drag_info.motion_callback = &Editor::region_drag_motion_callback;
+       drag_info.finished_callback = &Editor::region_drag_finished_callback;
        show_verbose_time_cursor (drag_info.last_frame_position, 10);
-
-       //begin_reversible_command (_("copy region(s)"));
 }
 
 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;
        }
 
@@ -2756,13 +2725,13 @@ 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 = (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
@@ -2777,15 +2746,55 @@ 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); 
-       jack_nframes_t pending_region_position = 0;
+       RegionView* rv = reinterpret_cast<RegionView*> (drag_info.data); 
+       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
        bool clamp_y_axis = false;
        vector<int32_t>  height_list(512) ;
        vector<int32_t>::iterator j;
 
-       cerr << "region motion to " << drag_info.current_pointer_frame << endl;
+       if (drag_info.copy && drag_info.move_threshold_passed && drag_info.want_move_threshold) {
+
+               drag_info.want_move_threshold = false; // don't copy again
+
+               /* duplicate the region(s) */
+               
+               vector<RegionView*> new_regionviews;
+               
+               for (list<RegionView*>::const_iterator i = selection->regions.by_layer().begin(); i != selection->regions.by_layer().end(); ++i) {
+                       RegionView* rv;
+                       RegionView* nrv;
+                       AudioRegionView* arv;
+
+                       rv = (*i);
+
+                       
+                       if ((arv = dynamic_cast<AudioRegionView*>(rv)) == 0) {
+                               /* XXX handle MIDI here */
+                               continue;
+                       }
+
+                       nrv = new AudioRegionView (*arv);
+                       nrv->get_canvas_group()->show ();
+
+                       new_regionviews.push_back (nrv);
+               }
+
+               if (new_regionviews.empty()) {
+                       return;
+               }
+
+               /* reset selection to new regionviews */
+               
+               selection->set (new_regionviews);
+               
+               /* reset drag_info data to reflect the fact that we are dragging the copies */
+               
+               drag_info.data = new_regionviews.front();
+               
+               swap_grab (new_regionviews.front()->get_canvas_group (), 0, event->motion.time);
+       }
 
        /* Which trackview is this ? */
 
@@ -2876,16 +2885,15 @@ 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 */      
@@ -2970,18 +2978,18 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
           the region would be if we moved it by that much.
        */
 
-       if (drag_info.move_threshold_passsed) {
+       if (drag_info.move_threshold_passed) {
 
                if ((int32_t)drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
 
-                       jack_nframes_t sync_frame;
-                       jack_nframes_t sync_offset;
+                       nframes_t sync_frame;
+                       nframes_t sync_offset;
                        int32_t sync_dir;
            
                        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.
                         */
@@ -3000,7 +3008,7 @@ 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;
                }
          
@@ -3042,14 +3050,11 @@ 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);
@@ -3066,160 +3071,158 @@ Editor::region_drag_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
                         MOTION                                                               
        ************************************************************/
 
-       pair<set<Playlist*>::iterator,bool> insert_result;
-       const list<AudioRegionView*>& layered_regions = selection->audio_regions.by_layer();
+       bool do_move;
+
+       if (drag_info.first_move) {
+               if (drag_info.move_threshold_passed) {
+                       do_move = true;
+               } else {
+                       do_move = false;
+               }
+       } else {
+               do_move = true;
+       }
+
+       if (do_move) {
 
-       for (list<AudioRegionView*>::const_iterator i = layered_regions.begin(); i != layered_regions.end(); ++i) {
+               pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
+               const list<RegionView*>& layered_regions = selection->regions.by_layer();
+
+               for (list<RegionView*>::const_iterator i = layered_regions.begin(); i != layered_regions.end(); ++i) {
            
-               AudioRegionView* rv;
-               rv = (*i);
-               double ix1, ix2, iy1, iy2;
-               int32_t temp_pointer_y_span = pointer_y_span;
-
-               /* get item BBox, which will be relative to parent. so we have
-                  to query on a child, then convert to world coordinates using
-                  the parent.
-               */
+                       RegionView* rv = (*i);
+                       double ix1, ix2, iy1, iy2;
+                       int32_t temp_pointer_y_span = pointer_y_span;
 
-               rv->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
-               rv->get_canvas_group()->i2w (ix1, iy1);
-               TimeAxisView* tvp2 = trackview_by_y_position (iy1);
-               AudioTimeAxisView* canvas_atv = dynamic_cast<AudioTimeAxisView*>(tvp2);
-               AudioTimeAxisView* temp_atv;
-
-               if ((pointer_y_span != 0) && !clamp_y_axis) {
-                       y_delta = 0;
-                       int32_t x = 0;
-                       for (j = height_list.begin(); j!= height_list.end(); j++) {     
-                               if (x == canvas_atv->order) {
-                                       /* we found the track the region is on */
-                                       if (x != original_pointer_order) {
-                                               /*this isn't from the same track we're dragging from */
-                                               temp_pointer_y_span = canvas_pointer_y_span;
-                                       }                 
-                                       while (temp_pointer_y_span > 0) {
-                                               /* we're moving up canvas-wise,
-                                                  so  we need to find the next track height
-                                               */
-                                               if (j != height_list.begin()) {           
-                                                       j--;
-                                               }
-                                               if (x != original_pointer_order) { 
-                                                       /* we're not from the dragged track, so ignore hidden tracks. */              
-                                                       if ((*j) == 0) {
-                                                               temp_pointer_y_span++;
-                                                       }
-                                               }          
-                                               y_delta -= (*j);        
-                                               temp_pointer_y_span--;  
-                                       }
-                                       while (temp_pointer_y_span < 0) {                 
-                                               y_delta += (*j);
-                                               if (x != original_pointer_order) { 
-                                                       if ((*j) == 0) {
-                                                               temp_pointer_y_span--;
+                       /* get item BBox, which will be relative to parent. so we have
+                          to query on a child, then convert to world coordinates using
+                          the parent.
+                       */
+
+                       rv->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
+                       rv->get_canvas_group()->i2w (ix1, iy1);
+                       TimeAxisView* tvp2 = trackview_by_y_position (iy1);
+                       AudioTimeAxisView* canvas_atv = dynamic_cast<AudioTimeAxisView*>(tvp2);
+                       AudioTimeAxisView* temp_atv;
+
+                       if ((pointer_y_span != 0) && !clamp_y_axis) {
+                               y_delta = 0;
+                               int32_t x = 0;
+                               for (j = height_list.begin(); j!= height_list.end(); j++) {     
+                                       if (x == canvas_atv->order) {
+                                               /* we found the track the region is on */
+                                               if (x != original_pointer_order) {
+                                                       /*this isn't from the same track we're dragging from */
+                                                       temp_pointer_y_span = canvas_pointer_y_span;
+                                               }                 
+                                               while (temp_pointer_y_span > 0) {
+                                                       /* we're moving up canvas-wise,
+                                                          so  we need to find the next track height
+                                                       */
+                                                       if (j != height_list.begin()) {           
+                                                               j--;
                                                        }
-                                               }          
+                                                       if (x != original_pointer_order) { 
+                                                               /* we're not from the dragged track, so ignore hidden tracks. */              
+                                                               if ((*j) == 0) {
+                                                                       temp_pointer_y_span++;
+                                                               }
+                                                       }          
+                                                       y_delta -= (*j);        
+                                                       temp_pointer_y_span--;  
+                                               }
+                                               while (temp_pointer_y_span < 0) {                 
+                                                       y_delta += (*j);
+                                                       if (x != original_pointer_order) { 
+                                                               if ((*j) == 0) {
+                                                                       temp_pointer_y_span--;
+                                                               }
+                                                       }          
                    
-                                               if (j != height_list.end()) {                 
-                                                       j++;
+                                                       if (j != height_list.end()) {                 
+                                                               j++;
+                                                       }
+                                                       temp_pointer_y_span++;
                                                }
-                                               temp_pointer_y_span++;
-                                       }
-                                       /* find out where we'll be when we move and set height accordingly */
+                                               /* find out where we'll be when we move and set height accordingly */
                  
-                                       tvp2 = trackview_by_y_position (iy1 + y_delta);
-                                       temp_atv = dynamic_cast<AudioTimeAxisView*>(tvp2);
-                                       rv->set_height (temp_atv->height);
+                                               tvp2 = trackview_by_y_position (iy1 + y_delta);
+                                               temp_atv = dynamic_cast<AudioTimeAxisView*>(tvp2);
+                                               rv->set_height (temp_atv->height);
        
-                                       /*   if you un-comment the following, the region colours will follow the track colours whilst dragging,
-                                            personally, i think this can confuse things, but never mind.
-                                       */
+                                               /*   if you un-comment the following, the region colours will follow the track colours whilst dragging,
+                                                    personally, i think this can confuse things, but never mind.
+                                               */
                                  
-                                       //const GdkColor& col (temp_atv->view->get_region_color());
-                                       //rv->set_color (const_cast<GdkColor&>(col));
-                                       break;          
+                                               //const GdkColor& col (temp_atv->view->get_region_color());
+                                               //rv->set_color (const_cast<GdkColor&>(col));
+                                               break;          
+                                       }
+                                       x++;
                                }
-                               x++;
                        }
-               }
          
-               /* prevent the regionview from being moved to before 
-                  the zero position on the canvas.
-               */
-               /* clamp */
+                       /* prevent the regionview from being moved to before 
+                          the zero position on the canvas.
+                       */
+                       /* clamp */
                
-               if (x_delta < 0) {
-                       if (-x_delta > ix1) {
-                               x_delta = -ix1;
+                       if (x_delta < 0) {
+                               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) {
 
-                       /* hide any dependent views */
+                       if (drag_info.first_move) {
 
-//                     rv->get_time_axis_view().hide_dependent_views (*rv);
-                               
-                       /* this is subtle. raising the regionview itself won't help,
-                          because raise_to_top() just puts the item on the top of
-                          its parent's stack. so, we need to put the trackview canvas_display group
-                          on the top, since its parent is the whole canvas.
-                       */
-
-                       rv->get_canvas_group()->raise_to_top();
-                       rv->get_time_axis_view().canvas_display->raise_to_top();
-                       cursor_group->raise_to_top();
+                               /* hide any dependent views */
+                       
+                               rv->get_time_axis_view().hide_dependent_views (*rv);
+                       
+                               /* this is subtle. raising the regionview itself won't help,
+                                  because raise_to_top() just puts the item on the top of
+                                  its parent's stack. so, we need to put the trackview canvas_display group
+                                  on the top, since its parent is the whole canvas.
+                               */
+                       
+                               rv->get_canvas_group()->raise_to_top();
+                               rv->get_time_axis_view().canvas_display->raise_to_top();
+                               cursor_group->raise_to_top();
 
-                       /* freeze the playlists from notifying till
-                          the motion is done.
-                       */
+                               rv->fake_set_opaque (true);
+                       }
+                       
+                       if (drag_info.brushing) {
+                               mouse_brush_insert_region (rv, pending_region_position);
+                       } else {
+                               rv->move (x_delta, y_delta);                    
+                       }
 
-                       AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*> (&rv->get_time_axis_view());
-                       if (atv && atv->is_audio_track()) {
-                               AudioPlaylist* pl = atv->get_diskstream()->playlist();
-                               if (pl) {
-                                       /* only freeze and capture state once */
+               } /* foreach region */
 
-                                       insert_result = motion_frozen_playlists.insert (pl);
-                                       if (insert_result.second) {
-                                               pl->freeze();
-                                               session->add_undo(pl->get_memento());
-                                       }
-                               }
-                       }
-               }
+       } /* if do_move */
 
-               if (drag_info.brushing) {
-                       mouse_brush_insert_region (rv, pending_region_position);
-               } else {
-                       rv->move (x_delta, y_delta);                    
-               }
-       }
-               
-       if (drag_info.first_move) {
+       if (drag_info.first_move && drag_info.move_threshold_passed) {
                cursor_group->raise_to_top();
+               drag_info.first_move = false;
        }
-               
-       drag_info.first_move = false;
-               
+
        if (x_delta != 0 && !drag_info.brushing) {
                show_verbose_time_cursor (drag_info.last_frame_position, 10);
        }
-               
 } 
 
 void
 Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       jack_nframes_t where;
-       AudioRegionView* rv = reinterpret_cast<AudioRegionView *> (drag_info.data);
-       pair<set<Playlist*>::iterator,bool> insert_result;
+       nframes_t where;
+       RegionView* rv = reinterpret_cast<RegionView *> (drag_info.data);
+       pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
        bool nocommit = true;
        double speed;
-       AudioTimeAxisView* atv;
+       RouteTimeAxisView* atv;
        bool regionview_y_movement;
        bool regionview_x_movement;
 
@@ -3253,120 +3256,111 @@ 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 != (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); 
        //printf ("last_rackview: %s \n", drag_info.last_trackview->name().c_str()); 
        
-       if (regionview_y_movement) {
-
-               /* motion between tracks */
-
-               list<AudioRegionView*> new_selection;
-       
-               /* moved to a different audio track. */
+       char* op_string;
 
-               for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ) {
-           
-                       AudioRegionView* 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,
-                          any existing editor for the region should no longer be
-                          visible.
-                       */ 
-           
-                       if (!drag_info.copy) {
-                               rv2->hide_region_editor();
-                       }           
-                       new_selection.push_back (rv2);      
-                       i++;
+       if (drag_info.copy) {
+               if (drag_info.x_constrained) {
+                       op_string = _("fixed time region copy");
+               } else {
+                       op_string = _("region copy");
+               } 
+       } else {
+               if (drag_info.x_constrained) {
+                       op_string = _("fixed time region drag");
+               } else {
+                       op_string = _("region drag");
                }
+       }
 
-               /* first, freeze the target tracks */
-
-               for (list<AudioRegionView*>::const_iterator i = new_selection.begin(); i != new_selection.end();i++ ) {
-
-                       Playlist* from_playlist;
-                       Playlist* to_playlist;
-                               
-                       double ix1, ix2, iy1, iy2;
-           
-                       (*i)->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
-                       (*i)->get_canvas_group()->i2w (ix1, iy1);
-                       TimeAxisView* tvp2 = trackview_by_y_position (iy1);
-                       AudioTimeAxisView* atv2 = dynamic_cast<AudioTimeAxisView*>(tvp2);
-           
-                       from_playlist = (*i)->region.playlist();
-                       to_playlist = atv2->playlist();
-
-                       /* the from_playlist was frozen in the "first_move" case 
-                          of the motion handler. the insert can fail, 
-                          but that doesn't matter. it just means
-                          we already have the playlist in the list.
-                       */
-                       
-                       motion_frozen_playlists.insert (from_playlist);
-
-                       /* only freeze the to_playlist once */
+       begin_reversible_command (op_string);
 
-                       insert_result = motion_frozen_playlists.insert(to_playlist);
-                       if (insert_result.second) {
-                               to_playlist->freeze();
-                               session->add_undo(to_playlist->get_memento());
-                       }
+       if (regionview_y_movement) {
 
-               }
+               /* moved to a different audio track. */
 
-               /* now do it again with the actual operations */
+               list<RegionView*> new_selection;
+               new_selection = selection->regions.by_layer();
+               selection->clear_regions ();
 
-               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) {
+           
+                       RegionView* rv = (*i);              
 
-                       Playlist* from_playlist;
-                       Playlist* to_playlist;
-                               
                        double ix1, ix2, iy1, iy2;
-           
-                       (*i)->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
-                       (*i)->get_canvas_group()->i2w (ix1, iy1);
+                       
+                       rv->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
+                       rv->get_canvas_group()->i2w (ix1, iy1);
                        TimeAxisView* tvp2 = trackview_by_y_position (iy1);
                        AudioTimeAxisView* atv2 = dynamic_cast<AudioTimeAxisView*>(tvp2);
+
+                       boost::shared_ptr<Playlist> from_playlist = rv->region()->playlist();
+                       boost::shared_ptr<Playlist> to_playlist = atv2->playlist();
            
-                       from_playlist = (*i)->region.playlist();
-                       to_playlist = atv2->playlist();
+                       where = (nframes_t) (unit_to_frame (ix1) * speed);
+                       boost::shared_ptr<Region> new_region (RegionFactory::create (rv->region()));
 
-                       latest_regionview = 0;
+                       if (!drag_info.copy) {
+                               
+                               /* 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,
+                                  any existing editor for the region should no longer be
+                                  visible.
+                               */ 
            
-                       where = (jack_nframes_t) (unit_to_frame (ix1) * speed);
-                       Region* new_region = createRegion ((*i)->region);
+                               rv->hide_region_editor();
+                               rv->fake_set_opaque (false);
 
-                       from_playlist->remove_region (&((*i)->region));
-         
-                       sigc::connection c = atv2->view->AudioRegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
-                       to_playlist->add_region (*new_region, where);
-                       c.disconnect ();
+                               session->add_command (new MementoCommand<Playlist>(*from_playlist, &from_playlist->get_state(), 0));    
+                               from_playlist->remove_region ((rv->region()));
+                               session->add_command (new MementoCommand<Playlist>(*from_playlist, 0, &from_playlist->get_state()));    
+                       }
+
+                       latest_regionview = 0;
                        
+                       sigc::connection c = atv2->view()->RegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
+                       session->add_command (new MementoCommand<Playlist>(*to_playlist, &to_playlist->get_state(), 0));        
+                       to_playlist->add_region (new_region, where);
+                       session->add_command (new MementoCommand<Playlist>(*to_playlist, 0, &to_playlist->get_state()));        
+                       c.disconnect ();
+                                                             
                        if (latest_regionview) {
                                selection->add (latest_regionview);
                        }
+
+                       if (drag_info.copy) {
+                               // get rid of the copy
+                               delete rv;
+                       } 
                } 
 
        } else {
 
                /* motion within a single track */
+
+               list<RegionView*> regions = selection->regions.by_layer();
+
+               if (drag_info.copy) {
+                       selection->clear_regions();
+               }
                
-               for (list<AudioRegionView*>::const_iterator i = selection->audio_regions.by_layer().begin(); i != selection->audio_regions.by_layer().end(); ++i) {
+               for (list<RegionView*>::iterator i = regions.begin(); i != regions.end(); ++i) {
 
                        rv = (*i);
 
-                       if (rv->region.locked()) {
+                       if (rv->region()->locked()) {
                                continue;
                        }
                        
+
                        if (regionview_x_movement) {
                                double ownspeed = 1.0;
-                               AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*> (&(rv->get_time_axis_view()));
+                               atv = dynamic_cast<AudioTimeAxisView*> (&(rv->get_time_axis_view()));
 
                                if (atv && atv->get_diskstream()) {
                                        ownspeed = atv->get_diskstream()->speed();
@@ -3378,29 +3372,69 @@ Editor::region_drag_finished_callback (ArdourCanvas::Item* item, GdkEvent* event
                                
                                rv->get_canvas_frame()->get_bounds (ix1, iy1, ix2, iy2);
                                rv->get_canvas_group()->i2w (ix1, iy1);
-                               where = (jack_nframes_t) (unit_to_frame (ix1) * ownspeed);
+                               where = (nframes_t) (unit_to_frame (ix1) * ownspeed);
                                
                        } else {
                                
-                               where = rv->region.position();
+                               where = rv->region()->position();
                        }
 
-                       rv->get_time_axis_view().reveal_dependent_views (*rv);
+                       boost::shared_ptr<Playlist> to_playlist = rv->region()->playlist();
 
-                       /* 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);
+                       /* add the undo */
+
+                       session->add_command (new MementoCommand<Playlist>(*to_playlist, &to_playlist->get_state(), 0));        
+
+                       if (drag_info.copy) {
+
+                               boost::shared_ptr<Region> newregion;
+                               boost::shared_ptr<Region> ar;
+
+                               if ((ar = boost::dynamic_pointer_cast<AudioRegion>(rv->region())) != 0) {
+                                       newregion = RegionFactory::create (ar);
+                               } else {
+                                       /* XXX MIDI HERE drobilla */
+                                       continue;
+                               }
+
+                               /* add it */
+                               
+                               latest_regionview = 0;
+                               sigc::connection c = atv->view()->RegionViewAdded.connect (mem_fun(*this, &Editor::collect_new_region_view));
+                               to_playlist->add_region (newregion, (nframes_t) (where * atv->get_diskstream()->speed()));
+                               c.disconnect ();
+                               
+                               if (latest_regionview) {
+                                       atv->reveal_dependent_views (*latest_regionview);
+                                       selection->add (latest_regionview);
+                               }
+                               
+                               /* if the original region was locked, we don't care for the new one */
+                               
+                               newregion->set_locked (false);                  
+
+                       } else {
+
+                               /* just change the model */
+
+                               rv->region()->set_position (where, (void*) this);
+
+                       }
+
+                       /* add the redo */
+
+                       session->add_command (new MementoCommand<Playlist>(*to_playlist, 0, &to_playlist->get_state()));
+
+                       /* get rid of the copy */
+
+                       if (drag_info.copy) {
+                               delete rv;
+                       }
                }
        }
 
   out:
-       for (set<Playlist*>::iterator p = motion_frozen_playlists.begin(); p != motion_frozen_playlists.end(); ++p) {
-               (*p)->thaw ();
-               session->add_redo_no_execute ((*p)->get_memento());
-       }
-
-       motion_frozen_playlists.clear ();
-
+       
        if (!nocommit) {
                commit_reversible_command ();
        }
@@ -3423,25 +3457,27 @@ 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, (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, (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, (nframes_t) (edit_cursor->current_frame * speed));
                }
        }
 }
 
 void
-Editor::show_verbose_time_cursor (jack_nframes_t frame, double offset, double xpos, double ypos) 
+Editor::show_verbose_time_cursor (nframes_t frame, double offset, double xpos, double ypos) 
 {
        char buf[128];
-       SMPTE_Time smpte;
+       SMPTE::Time smpte;
        BBT_Time bbt;
+       int hours, mins;
+       nframes_t frame_rate;
        float secs;
 
        if (session == 0) {
@@ -3460,10 +3496,14 @@ Editor::show_verbose_time_cursor (jack_nframes_t frame, double offset, double xp
                break;
 
        case AudioClock::MinSec:
-               /* XXX fix this to compute min/sec properly */
-               session->smpte_time (frame, smpte);
-               secs = smpte.seconds + ((float) smpte.frames / session->smpte_frames_per_second);
-               snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%.4f", smpte.hours, smpte.minutes, secs);
+               /* XXX this is copied from show_verbose_duration_cursor() */
+               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);
                break;
 
        default:
@@ -3481,12 +3521,14 @@ Editor::show_verbose_time_cursor (jack_nframes_t frame, double offset, double xp
 }
 
 void
-Editor::show_verbose_duration_cursor (jack_nframes_t start, jack_nframes_t end, double offset, double xpos, double ypos) 
+Editor::show_verbose_duration_cursor (nframes_t start, nframes_t end, double offset, double xpos, double ypos) 
 {
        char buf[128];
-       SMPTE_Time smpte;
+       SMPTE::Time smpte;
        BBT_Time sbbt;
        BBT_Time ebbt;
+       int hours, mins;
+       nframes_t distance, frame_rate;
        float secs;
        Meter meter_at_start(session->tempo_map().meter_at(start));
 
@@ -3527,10 +3569,15 @@ Editor::show_verbose_duration_cursor (jack_nframes_t start, jack_nframes_t end,
                break;
 
        case AudioClock::MinSec:
-               /* XXX fix this to compute min/sec properly */
-               session->smpte_duration (end - start, smpte);
-               secs = smpte.seconds + ((float) smpte.frames / session->smpte_frames_per_second);
-               snprintf (buf, sizeof (buf), "%02ld:%02ld:%.4f", smpte.hours, smpte.minutes, secs);
+               /* XXX this stuff should be elsewhere.. */
+               distance = end - start;
+               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);
                break;
 
        default:
@@ -3548,7 +3595,7 @@ 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;
 }
@@ -3562,7 +3609,7 @@ Editor::start_selection_grab (ArdourCanvas::Item* item, GdkEvent* event)
 
        /* lets try to create new Region for the selection */
 
-       vector<AudioRegion*> new_regions;
+       vector<boost::shared_ptr<AudioRegion> > new_regions;
        create_region_from_selection (new_regions);
 
        if (new_regions.empty()) {
@@ -3571,7 +3618,7 @@ Editor::start_selection_grab (ArdourCanvas::Item* item, GdkEvent* event)
 
        /* XXX fix me one day to use all new regions */
        
-       Region* region = new_regions.front();
+       boost::shared_ptr<Region> region (new_regions.front());
 
        /* add it to the current stream/playlist.
 
@@ -3581,7 +3628,7 @@ 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.
@@ -3589,11 +3636,12 @@ Editor::start_selection_grab (ArdourCanvas::Item* item, GdkEvent* event)
 
        begin_reversible_command (_("selection grab"));
 
-       Playlist* playlist = clicked_trackview->playlist();
+       boost::shared_ptr<Playlist> playlist = clicked_trackview->playlist();
 
-       session->add_undo (playlist->get_memento ());
-       clicked_trackview->playlist()->add_region (*region, selection->time[clicked_selection].start);
-       session->add_redo_no_execute (playlist->get_memento ());
+        XMLNode *before = &(playlist->get_state());
+       clicked_trackview->playlist()->add_region (region, selection->time[clicked_selection].start);
+        XMLNode *after = &(playlist->get_state());
+       session->add_command(new MementoCommand<Playlist>(*playlist, before, after));
 
        commit_reversible_command ();
        
@@ -3616,7 +3664,7 @@ 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);
@@ -3637,8 +3685,8 @@ Editor::cancel_selection ()
 void
 Editor::start_selection_op (ArdourCanvas::Item* item, GdkEvent* event, SelectionOp op)
 {
-       jack_nframes_t start = 0;
-       jack_nframes_t end = 0;
+       nframes_t start = 0;
+       nframes_t end = 0;
 
        if (session == 0) {
                return;
@@ -3652,7 +3700,6 @@ Editor::start_selection_op (ArdourCanvas::Item* item, GdkEvent* event, Selection
 
        switch (op) {
        case CreateSelection:
-               
                if (Keyboard::modifier_state_equals (event->button.state, Keyboard::Shift)) {
                        drag_info.copy = true;
                } else {
@@ -3662,14 +3709,18 @@ Editor::start_selection_op (ArdourCanvas::Item* item, GdkEvent* event, Selection
                break;
 
        case SelectionStartTrim:
-               clicked_trackview->order_selection_trims (item, true);
+               if (clicked_trackview) {
+                       clicked_trackview->order_selection_trims (item, true);
+               } 
                start_grab (event, trimmer_cursor);
                start = selection->time[clicked_selection].start;
                drag_info.pointer_frame_offset = drag_info.grab_frame - start;  
                break;
                
        case SelectionEndTrim:
-               clicked_trackview->order_selection_trims (item, false);
+               if (clicked_trackview) {
+                       clicked_trackview->order_selection_trims (item, false);
+               }
                start_grab (event, trimmer_cursor);
                end = selection->time[clicked_selection].end;
                drag_info.pointer_frame_offset = drag_info.grab_frame - end;    
@@ -3692,10 +3743,10 @@ Editor::start_selection_op (ArdourCanvas::Item* item, GdkEvent* event, Selection
 void
 Editor::drag_selection (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       jack_nframes_t start = 0;
-       jack_nframes_t end = 0;
-       jack_nframes_t length;
-       jack_nframes_t pending_position;
+       nframes_t start = 0;
+       nframes_t end = 0;
+       nframes_t length;
+       nframes_t pending_position;
 
        if ((int32_t) drag_info.current_pointer_frame > drag_info.pointer_frame_offset) {
                pending_position = drag_info.current_pointer_frame - drag_info.pointer_frame_offset;
@@ -3854,12 +3905,10 @@ 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);
+       nframes_t region_start = (nframes_t) (clicked_regionview->region()->position() / speed);
+       nframes_t region_end = (nframes_t) (clicked_regionview->region()->last_frame() / speed);
+       nframes_t region_length = (nframes_t) (clicked_regionview->region()->length() / speed);
 
-       motion_frozen_playlists.clear();
-       
        //drag_info.item = clicked_regionview->get_name_highlight();
        drag_info.item = item;
        drag_info.motion_callback = &Editor::trim_motion_callback;
@@ -3896,8 +3945,8 @@ Editor::start_trim (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::trim_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       AudioRegionView* rv = clicked_regionview;
-       jack_nframes_t frame_delta = 0;
+       RegionView* rv = clicked_regionview;
+       nframes_t frame_delta = 0;
        bool left_direction;
        bool obey_snap = !Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier());
 
@@ -3908,8 +3957,8 @@ Editor::trim_motion_callback (ArdourCanvas::Item* item, GdkEvent* event)
 
        double speed = 1.0;
        TimeAxisView* tvp = clicked_trackview;
-       AudioTimeAxisView* tv = dynamic_cast<AudioTimeAxisView*>(tvp);
-       pair<set<Playlist*>::iterator,bool> insert_result;
+       RouteTimeAxisView* tv = dynamic_cast<RouteTimeAxisView*>(tvp);
+       pair<set<boost::shared_ptr<Playlist> >::iterator,bool> insert_result;
 
        if (tv && tv->is_audio_track()) {
                speed = tv->get_diskstream()->speed();
@@ -3947,14 +3996,18 @@ 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)->fake_set_opaque(false);
+                       (*i)->region()->freeze ();
+               
+                       AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
+                       if (arv)
+                               arv->temporarily_hide_envelope ();
 
-                       Playlist * pl = (*i)->region.playlist();
+                       boost::shared_ptr<Playlist> pl = (*i)->region()->playlist();
                        insert_result = motion_frozen_playlists.insert (pl);
                        if (insert_result.second) {
-                               session->add_undo (pl->get_memento());
+                                session->add_command(new MementoCommand<Playlist>(*pl, &pl->get_state(), 0));
                        }
                }
        }
@@ -3967,20 +4020,20 @@ 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 > (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;
@@ -3994,8 +4047,8 @@ 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);
                        }
@@ -4005,10 +4058,10 @@ 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((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((nframes_t) (rv->region()->last_frame()/speed), 10);   
                break;
        case ContentsTrim:
                show_verbose_time_cursor(drag_info.current_pointer_frame, 10);  
@@ -4020,19 +4073,19 @@ 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, nframes_t frame_delta, bool left_direction, bool swap_direction, bool obey_snap)
 {
-       Region& region (rv.region);
+       boost::shared_ptr<Region> region (rv.region());
 
-       if (region.locked()) {
+       if (region->locked()) {
                return;
        }
 
-       jack_nframes_t new_bound;
+       nframes_t new_bound;
 
        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();
@@ -4040,35 +4093,35 @@ Editor::single_contents_trim (AudioRegionView& rv, jack_nframes_t frame_delta, b
        
        if (left_direction) {
                if (swap_direction) {
-                       new_bound = (jack_nframes_t) (region.position()/speed) + frame_delta;
+                       new_bound = (nframes_t) (region->position()/speed) + frame_delta;
                } else {
-                       new_bound = (jack_nframes_t) (region.position()/speed) - frame_delta;
+                       new_bound = (nframes_t) (region->position()/speed) - frame_delta;
                }
        } else {
                if (swap_direction) {
-                       new_bound = (jack_nframes_t) (region.position()/speed) - frame_delta;
+                       new_bound = (nframes_t) (region->position()/speed) - frame_delta;
                } else {
-                       new_bound = (jack_nframes_t) (region.position()/speed) + frame_delta;
+                       new_bound = (nframes_t) (region->position()/speed) + frame_delta;
                }
        }
 
        if (obey_snap) {
                snap_to (new_bound);
        }
-       region.trim_start ((jack_nframes_t) (new_bound * speed), this); 
+       region->trim_start ((nframes_t) (new_bound * speed), this);     
        rv.region_changed (StartChanged);
 }
 
 void
-Editor::single_start_trim (AudioRegionView& rv, jack_nframes_t frame_delta, bool left_direction, bool obey_snap)
+Editor::single_start_trim (RegionView& rv, nframes_t frame_delta, bool left_direction, bool obey_snap)
 {
-       Region& region (rv.region);     
+       boost::shared_ptr<Region> region (rv.region()); 
 
-       if (region.locked()) {
+       if (region->locked()) {
                return;
        }
 
-       jack_nframes_t new_bound;
+       nframes_t new_bound;
 
        double speed = 1.0;
        TimeAxisView* tvp = clicked_trackview;
@@ -4079,30 +4132,30 @@ Editor::single_start_trim (AudioRegionView& rv, jack_nframes_t frame_delta, bool
        }
        
        if (left_direction) {
-               new_bound = (jack_nframes_t) (region.position()/speed) - frame_delta;
+               new_bound = (nframes_t) (region->position()/speed) - frame_delta;
        } else {
-               new_bound = (jack_nframes_t) (region.position()/speed) + frame_delta;
+               new_bound = (nframes_t) (region->position()/speed) + frame_delta;
        }
 
        if (obey_snap) {
                snap_to (new_bound, (left_direction ? 0 : 1));  
        }
 
-       region.trim_front ((jack_nframes_t) (new_bound * speed), this);
+       region->trim_front ((nframes_t) (new_bound * speed), this);
 
        rv.region_changed (Change (LengthChanged|PositionChanged|StartChanged));
 }
 
 void
-Editor::single_end_trim (AudioRegionView& rv, jack_nframes_t frame_delta, bool left_direction, bool obey_snap)
+Editor::single_end_trim (RegionView& rv, nframes_t frame_delta, bool left_direction, bool obey_snap)
 {
-       Region& region (rv.region);
+       boost::shared_ptr<Region> region (rv.region());
 
-       if (region.locked()) {
+       if (region->locked()) {
                return;
        }
 
-       jack_nframes_t new_bound;
+       nframes_t new_bound;
 
        double speed = 1.0;
        TimeAxisView* tvp = clicked_trackview;
@@ -4113,15 +4166,15 @@ Editor::single_end_trim (AudioRegionView& rv, jack_nframes_t frame_delta, bool l
        }
        
        if (left_direction) {
-               new_bound = (jack_nframes_t) ((region.last_frame() + 1)/speed) - frame_delta;
+               new_bound = (nframes_t) ((region->last_frame() + 1)/speed) - frame_delta;
        } else {
-               new_bound = (jack_nframes_t) ((region.last_frame() + 1)/speed) + frame_delta;
+               new_bound = (nframes_t) ((region->last_frame() + 1)/speed) + frame_delta;
        }
 
        if (obey_snap) {
                snap_to (new_bound);
        }
-       region.trim_end ((jack_nframes_t) (new_bound * speed), this);
+       region->trim_end ((nframes_t) (new_bound * speed), this);
        rv.region_changed (LengthChanged);
 }
        
@@ -4135,17 +4188,18 @@ 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);
+                               (*i)->fake_set_opaque (true);
                        }
                }
                
-               for (set<Playlist*>::iterator p = motion_frozen_playlists.begin(); p != motion_frozen_playlists.end(); ++p) {
+               for (set<boost::shared_ptr<Playlist> >::iterator p = motion_frozen_playlists.begin(); p != motion_frozen_playlists.end(); ++p) {
                        //(*p)->thaw ();
-                       session->add_redo_no_execute ((*p)->get_memento());
-               }
+                        session->add_command (new MementoCommand<Playlist>(*(*p).get(), 0, &(*p)->get_state()));
+                }
                
                motion_frozen_playlists.clear ();
 
@@ -4159,8 +4213,8 @@ Editor::trim_finished_callback (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::point_trim (GdkEvent* event)
 {
-       AudioRegionView* rv = clicked_regionview;
-       jack_nframes_t new_bound = drag_info.current_pointer_frame;
+       RegionView* rv = clicked_regionview;
+       nframes_t new_bound = drag_info.current_pointer_frame;
 
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
                snap_to (new_bound);
@@ -4174,22 +4228,26 @@ 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()) {
+                                       boost::shared_ptr<Playlist> pl = (*i)->region()->playlist();
+                                        XMLNode &before = pl->get_state();
+                                       (*i)->region()->trim_front (new_bound, this);   
+                                        XMLNode &after = pl->get_state();
+                                        session->add_command(new MementoCommand<Playlist>(*pl.get(), &before, &after));
                                }
                        }
 
                } 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()) {
+                               boost::shared_ptr<Playlist> pl = rv->region()->playlist();
+                               XMLNode &before = pl->get_state();
+                               rv->region()->trim_front (new_bound, this);     
+                                XMLNode &after = pl->get_state();
+                               session->add_command(new MementoCommand<Playlist>(*pl.get(), &before, &after));
                        }
                }
 
@@ -4202,21 +4260,25 @@ 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()) {
+                                       boost::shared_ptr<Playlist> pl = (*i)->region()->playlist();
+                                       XMLNode &before = pl->get_state();
+                                       (*i)->region()->trim_end (new_bound, this);
+                                       XMLNode &after = pl->get_state();
+                                       session->add_command(new MementoCommand<Playlist>(*pl.get(), &before, &after));
                                }
                        }
 
                } 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()) {
+                               boost::shared_ptr<Playlist> pl = rv->region()->playlist();
+                               XMLNode &before = pl->get_state();
+                               rv->region()->trim_end (new_bound, this);
+                                XMLNode &after = pl->get_state();
+                               session->add_command (new MementoCommand<Playlist>(*pl.get(), &before, &after));
                        }
                }
 
@@ -4229,18 +4291,21 @@ Editor::point_trim (GdkEvent* event)
 }
 
 void
-Editor::thaw_region_after_trim (AudioRegionView& rv)
+Editor::thaw_region_after_trim (RegionView& rv)
 {
-       Region& region (rv.region);
+       boost::shared_ptr<Region> region (rv.region());
 
-       if (region.locked()) {
+       if (region->locked()) {
                return;
        }
 
-       region.thaw (_("trimmed region"));
-       session->add_redo_no_execute (region.playlist()->get_memento());
+       region->thaw (_("trimmed region"));
+        XMLNode &after = region->playlist()->get_state();
+       session->add_command (new MementoCommand<Playlist>(*(region->playlist()), 0, &after));
 
-       rv.unhide_envelope ();
+       AudioRegionView* arv = dynamic_cast<AudioRegionView*>(&rv);
+       if (arv)
+               arv->unhide_envelope ();
 }
 
 void
@@ -4262,7 +4327,6 @@ Editor::hide_marker (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::start_range_markerbar_op (ArdourCanvas::Item* item, GdkEvent* event, RangeMarkerOp op)
 {
-
        if (session == 0) {
                return;
        }
@@ -4297,8 +4361,8 @@ Editor::start_range_markerbar_op (ArdourCanvas::Item* item, GdkEvent* event, Ran
 void
 Editor::drag_range_markerbar_op (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       jack_nframes_t start = 0;
-       jack_nframes_t end = 0;
+       nframes_t start = 0;
+       nframes_t end = 0;
        ArdourCanvas::SimpleRect *crect = (range_marker_op == CreateRangeMarker) ? range_bar_drag_rect: transport_bar_drag_rect;
        
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
@@ -4327,7 +4391,7 @@ Editor::drag_range_markerbar_op (ArdourCanvas::Item* item, GdkEvent* event)
                }
                
                /* first drag: Either add to the selection
-                  or create a new selection->
+                  or create a new selection.
                */
                
                if (drag_info.first_move) {
@@ -4370,22 +4434,27 @@ void
 Editor::end_range_markerbar_op (ArdourCanvas::Item* item, GdkEvent* event)
 {
        Location * newloc = 0;
+       string rangename;
        
        if (!drag_info.first_move) {
                drag_range_markerbar_op (item, event);
 
                switch (range_marker_op) {
                case CreateRangeMarker:
+                   {
                        begin_reversible_command (_("new range marker"));
-                       session->add_undo (session->locations()->get_memento());
-                       newloc = new Location(temp_location->start(), temp_location->end(), "unnamed", Location::IsRangeMarker);
+                        XMLNode &before = session->locations()->get_state();
+                       session->locations()->next_available_name(rangename,"unnamed");
+                       newloc = new Location(temp_location->start(), temp_location->end(), rangename, Location::IsRangeMarker);
                        session->locations()->add (newloc, true);
-                       session->add_redo_no_execute (session->locations()->get_memento());
+                        XMLNode &after = session->locations()->get_state();
+                       session->add_command(new MementoCommand<Locations>(*(session->locations()), &before, &after));
                        commit_reversible_command ();
                        
                        range_bar_drag_rect->hide();
                        range_marker_drag_rect->hide();
                        break;
+                   }
 
                case CreateTransportMarker:
                        // popup menu to pick loop or punch
@@ -4394,12 +4463,38 @@ Editor::end_range_markerbar_op (ArdourCanvas::Item* item, GdkEvent* event)
                        break;
                }
        } else {
-               /* just a click, no pointer movement.*/
+               /* just a click, no pointer movement. remember that context menu stuff was handled elsewhere */
 
                if (Keyboard::no_modifier_keys_pressed (&event->button)) {
 
-                       // nothing yet
+                       nframes_t start;
+                       nframes_t end;
+
+                       start = session->locations()->first_mark_before (drag_info.grab_frame);
+                       end = session->locations()->first_mark_after (drag_info.grab_frame);
+                       
+                       if (end == max_frames) {
+                               end = session->current_end_frame ();
+                       }
+
+                       if (start == 0) {
+                               start = session->current_start_frame ();
+                       }
+
+                       switch (mouse_mode) {
+                       case MouseObject:
+                               /* find the two markers on either side and then make the selection from it */
+                               select_all_within (start, end, 0.0f, FLT_MAX, Selection::Set);
+                               break;
+
+                       case MouseRange:
+                               /* find the two markers on either side of the click and make the range out of it */
+                               selection->set (0, start, end);
+                               break;
 
+                       default:
+                               break;
+                       }
                } 
        }
 
@@ -4423,8 +4518,8 @@ Editor::start_mouse_zoom (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::drag_mouse_zoom (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       jack_nframes_t start;
-       jack_nframes_t end;
+       nframes_t start;
+       nframes_t end;
 
        if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
                snap_to (drag_info.current_pointer_frame);
@@ -4484,11 +4579,11 @@ Editor::end_mouse_zoom (ArdourCanvas::Item* item, GdkEvent* event)
 }
 
 void
-Editor::reposition_zoom_rect (jack_nframes_t start, jack_nframes_t end)
+Editor::reposition_zoom_rect (nframes_t start, nframes_t end)
 {
        double x1 = frame_to_pixel (start);
        double x2 = frame_to_pixel (end);
-       double y2 = canvas_height - 2;
+       double y2 = full_canvas_height - 1.0;
 
        zoom_rect->property_x1() = x1;
        zoom_rect->property_y1() = 1.0;
@@ -4511,8 +4606,8 @@ Editor::start_rubberband_select (ArdourCanvas::Item* item, GdkEvent* event)
 void
 Editor::drag_rubberband_select (ArdourCanvas::Item* item, GdkEvent* event)
 {
-       jack_nframes_t start;
-       jack_nframes_t end;
+       nframes_t start;
+       nframes_t end;
        double y1;
        double y2;
 
@@ -4522,16 +4617,15 @@ Editor::drag_rubberband_select (ArdourCanvas::Item* item, GdkEvent* event)
                return;
        }
 
-//     if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
-//             snap_to (drag_info.current_pointer_frame);
-               
-//             if (drag_info.first_move) {
-//                     snap_to (drag_info.grab_frame);
-//             }
-//     }
-               
+       if (!Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
+               if (drag_info.first_move) {
+                       snap_to (drag_info.grab_frame);
+               } 
+               snap_to (drag_info.current_pointer_frame);
+       }
 
        /* base start and end on initial click position */
+
        if (drag_info.current_pointer_frame < drag_info.grab_frame) {
                start = drag_info.current_pointer_frame;
                end = drag_info.grab_frame;
@@ -4543,8 +4637,7 @@ Editor::drag_rubberband_select (ArdourCanvas::Item* item, GdkEvent* event)
        if (drag_info.current_pointer_y < drag_info.grab_y) {
                y1 = drag_info.current_pointer_y;
                y2 = drag_info.grab_y;
-       }
-       else {
+       } else {
                y2 = drag_info.current_pointer_y;
                y1 = drag_info.grab_y;
        }
@@ -4591,7 +4684,7 @@ Editor::end_rubberband_select (ArdourCanvas::Item* item, GdkEvent* event)
                Selection::Operation op = Keyboard::selection_type (event->button.state);
                bool commit;
 
-               begin_reversible_command (_("select regions"));
+               begin_reversible_command (_("rubberband selection"));
 
                if (drag_info.grab_frame < drag_info.last_pointer_frame) {
                        commit = select_all_within (drag_info.grab_frame, drag_info.last_pointer_frame, y1, y2, op);
@@ -4604,7 +4697,8 @@ Editor::end_rubberband_select (ArdourCanvas::Item* item, GdkEvent* event)
                }
                
        } else {
-               selection->clear_audio_regions();
+               selection->clear_tracks();
+               selection->clear_regions();
                selection->clear_points ();
                selection->clear_lines ();
        }
@@ -4621,7 +4715,7 @@ 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 ();
@@ -4630,7 +4724,7 @@ 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;
        }
@@ -4652,7 +4746,7 @@ 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);
@@ -4662,8 +4756,8 @@ 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;
@@ -4681,21 +4775,25 @@ 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;
+       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, 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 */
@@ -4715,26 +4813,27 @@ 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;
        }
 
-       Playlist* playlist = atv->playlist();
+       boost::shared_ptr<Playlist> playlist = atv->playlist();
        double speed = atv->get_diskstream()->speed();
        
-       session->add_undo (playlist->get_memento());
-       playlist->add_region (*(new AudioRegion (rv->region)), (jack_nframes_t) (pos * speed));
-       session->add_redo_no_execute (playlist->get_memento());
+        XMLNode &before = playlist->get_state();
+       playlist->add_region (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (arv->audio_region())), (nframes_t) (pos * speed));
+        XMLNode &after = playlist->get_state();
+       session->add_command(new MementoCommand<Playlist>(*playlist.get(), &before, &after));
        
        // playlist is frozen, so we have to update manually
        
-       playlist->StateChanged (Change (~0)); /* EMIT SIGNAL */
+       playlist->Modified(); /* EMIT SIGNAL */
 }
 
 gint