major chunk of the region layering editor from 2.X, fwd-ported to 3.0

git-svn-id: svn://localhost/ardour2/branches/3.0@7689 d708f5d6-7413-0410-9779-e7cbd77b26cf

4 files changed, 87 insertions, 33 deletions

diff --git a/gtk2_ardour/editor.cc b/gtk2_ardour/editor.cc
index e1e4714eb3..aa0a76edcd 100644
--- a/gtk2_ardour/editor.cc
+++ b/gtk2_ardour/editor.cc
@@ -115,6 +115,7 @@
 #include "editor_locations.h"
 #include "editor_snapshots.h"
 #include "editor_summary.h"
+#include "region_layering_order_editor.h"
 
 #include "i18n.h"
 
@@ -384,6 +385,7 @@ Editor::Editor ()
 	_dragging_edit_point = false;
 	select_new_marker = false;
 	rhythm_ferret = 0;
+        layering_order_editor = 0;
 	_bundle_manager = 0;
 	no_save_visual = false;
 	resize_idle_id = -1;
@@ -748,7 +750,7 @@ Editor::~Editor()
 		image_socket_listener = 0 ;
 	}
 #endif
-
+        
 	delete _routes;
 	delete _route_groups;
 	delete track_canvas;
@@ -1522,28 +1524,26 @@ Editor::build_track_region_context_menu (nframes64_t frame)
 		   mode and so offering region context is somewhat confusing.
 		*/
 		if ((tr = rtv->track()) && ((pl = tr->playlist())) && !internal_editing()) {
-			Playlist::RegionList* regions = pl->regions_at ((nframes64_t) floor ( (double)frame * tr->speed()));
+                        framepos_t framepos = (framepos_t) floor ((double)frame * tr->speed());
+                        uint32_t regions_at = pl->count_regions_at (framepos);
+                        list<boost::shared_ptr<Region> > regions_for_menu;
 
  			if (selection->regions.size() > 1) {
  				// there's already a multiple selection: just add a
  				// single region context menu that will act on all
  				// selected regions
 
-				list<boost::shared_ptr<Region> > regions;
 				for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-					regions.push_back ((*i)->region ());
+					regions_for_menu.push_back ((*i)->region ());
 				}
-				
- 				add_region_context_items (rtv->view(), regions, edit_items);
- 			} else {
- 				for (Playlist::RegionList::reverse_iterator i = regions->rbegin(); i != regions->rend(); ++i) {
-					list<boost::shared_ptr<Region> > regions;
-					regions.push_back (*i);
- 					add_region_context_items (rtv->view(), regions, edit_items);
- 				}
-			}
+                        } else {
+                                boost::shared_ptr<Region> top_region = pl->top_region_at (framepos);
+                                if (top_region) {
+                                        regions_for_menu.push_back (top_region);
+                                }
+                        }
 
-			delete regions;
+                        add_region_context_items (rtv->view(), regions_for_menu, edit_items, framepos, regions_at > 1);
 		}
 	}
 
@@ -1568,7 +1568,6 @@ Editor::build_track_crossfade_context_menu (nframes64_t frame)
 
 		if ((tr = atv->track()) && ((pl = tr->playlist()) != 0) && ((apl = boost::dynamic_pointer_cast<AudioPlaylist> (pl)) != 0)) {
 
-			Playlist::RegionList* regions = pl->regions_at (frame);
 			AudioPlaylist::Crossfades xfades;
 
 			apl->crossfades_at (frame, xfades);
@@ -1579,25 +1578,26 @@ Editor::build_track_crossfade_context_menu (nframes64_t frame)
 				add_crossfade_context_items (atv->audio_view(), (*i), edit_items, many);
 			}
 
+			framepos_t framepos = (framepos_t) floor ((double)frame * tr->speed());
+			uint32_t regions_at = pl->count_regions_at (framepos);
+                        list<boost::shared_ptr<Region> > regions_for_menu;
+
 			if (selection->regions.size() > 1) {
-				// there's already a multiple selection: just add a
-				// single region context menu that will act on all
-				// selected regions
+ 				// there's already a multiple selection: just add a
+ 				// single region context menu that will act on all
+ 				// selected regions
 
-				list<boost::shared_ptr<Region> > regions;
 				for (RegionSelection::iterator i = selection->regions.begin(); i != selection->regions.end(); ++i) {
-					regions.push_back ((*i)->region ());
+					regions_for_menu.push_back ((*i)->region ());
 				}
-
-				add_region_context_items (atv->audio_view(), regions, edit_items);
-			} else {
- 				for (Playlist::RegionList::reverse_iterator i = regions->rbegin(); i != regions->rend(); ++i) {
-					list<boost::shared_ptr<Region> > regions;
-					regions.push_back (*i);
-					add_region_context_items (atv->audio_view(), regions, edit_items);
-				}
-			}
-			delete regions;
+                        } else {
+                                boost::shared_ptr<Region> top_region = pl->top_region_at (framepos);
+                                if (top_region) {
+                                        regions_for_menu.push_back (top_region);
+                                }
+                        }
+                        
+                        add_region_context_items (atv->audio_view(), regions_for_menu, edit_items, framepos, regions_at > 1);
 		}
 	}
 
@@ -1717,7 +1717,8 @@ Editor::xfade_edit_right_region ()
 }
 
 void
-Editor::add_region_context_items (StreamView* sv, list<boost::shared_ptr<Region> > regions, Menu_Helpers::MenuList& edit_items)
+Editor::add_region_context_items (StreamView* sv, list<boost::shared_ptr<Region> > regions, Menu_Helpers::MenuList& edit_items,
+                                  framepos_t position, bool multiple_regions_at_position)
 {
 	using namespace Menu_Helpers;
 	Gtk::MenuItem* foo_item;
@@ -2015,6 +2016,9 @@ Editor::add_region_context_items (StreamView* sv, list<boost::shared_ptr<Region>
 	}
 
 	edit_items.push_back (MenuElem (menu_item_name, *region_menu));
+	if (multiple_regions_at_position && (layering_order_editor == 0 || !layering_order_editor->is_visible ())) {
+		edit_items.push_back (MenuElem (_("Choose top region"), (bind (mem_fun(*this, &Editor::change_region_layering_order), position))));
+	}
 	edit_items.push_back (SeparatorElem());
 }
 
@@ -5565,3 +5569,44 @@ Editor::show_editor_list (bool yn)
 	}
 }
 
+void
+Editor::change_region_layering_order (framepos_t position)
+{
+	if (!clicked_regionview) {
+                if (layering_order_editor) {
+                        layering_order_editor->hide ();
+                }
+		return;
+	}
+
+        if (!clicked_routeview) {
+		return;
+	}
+
+        boost::shared_ptr<Track> track = boost::dynamic_pointer_cast<Track> (clicked_routeview->route());
+
+        if (!track) {
+                return;
+        }
+
+	boost::shared_ptr<Playlist> pl = track->playlist();
+
+	if (!pl) {
+                return;
+        }
+                
+        if (layering_order_editor == 0) {
+                layering_order_editor = new RegionLayeringOrderEditor(*this);
+        }
+
+        layering_order_editor->set_context (clicked_routeview->name(), _session, pl, position);
+        layering_order_editor->maybe_present ();
+}
+
+void
+Editor::update_region_layering_order_editor (framepos_t frame)
+{
+	if (layering_order_editor && layering_order_editor->is_visible ()) {
+		change_region_layering_order (frame);
+	}
+}
diff --git a/gtk2_ardour/editor.h b/gtk2_ardour/editor.h
index 2d4a8d453e..3b306e1594 100644
--- a/gtk2_ardour/editor.h
+++ b/gtk2_ardour/editor.h
@@ -128,6 +128,7 @@ class EditorRegions;
 class EditorLocations;
 class EditorSnapshots;
 class EditorSummary;
+class RegionLayeringOrderEditor;
 
 /* <CMT Additions> */
 class ImageFrameView;
@@ -672,7 +673,8 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
 	Gtk::Menu* build_track_selection_context_menu (nframes64_t);
 	void add_dstream_context_items (Gtk::Menu_Helpers::MenuList&);
 	void add_bus_context_items (Gtk::Menu_Helpers::MenuList&);
-	void add_region_context_items (StreamView*, std::list<boost::shared_ptr<ARDOUR::Region> >, Gtk::Menu_Helpers::MenuList&);
+	void add_region_context_items (StreamView*, std::list<boost::shared_ptr<ARDOUR::Region> >, Gtk::Menu_Helpers::MenuList&,
+                                       ARDOUR::framepos_t, bool);
 	void add_crossfade_context_items (AudioStreamView*, boost::shared_ptr<ARDOUR::Crossfade>, Gtk::Menu_Helpers::MenuList&, bool many);
 	void add_selection_context_items (Gtk::Menu_Helpers::MenuList&);
 
@@ -1062,6 +1064,7 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
 	void toggle_region_lock_style ();
 	void raise_region ();
 	void raise_region_to_top ();
+        void change_region_layering_order (ARDOUR::framepos_t);
 	void lower_region ();
 	void lower_region_to_bottom ();
 	void split_regions_at (nframes64_t, RegionSelection&);
@@ -2044,6 +2047,9 @@ public:
 
 	double _last_motion_y;
 
+        RegionLayeringOrderEditor* layering_order_editor;
+        void update_region_layering_order_editor (ARDOUR::framepos_t);
+
 	friend class Drag;
 	friend class RegionDrag;
 	friend class RegionMoveDrag;
diff --git a/gtk2_ardour/editor_mouse.cc b/gtk2_ardour/editor_mouse.cc
index 296a6ee328..a7b370a04b 100644
--- a/gtk2_ardour/editor_mouse.cc
+++ b/gtk2_ardour/editor_mouse.cc
@@ -1117,7 +1117,7 @@ Editor::button_press_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemTyp
 bool
 Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemType item_type)
 {
-	nframes64_t where = event_frame (event, 0, 0);
+	framepos_t where = event_frame (event, 0, 0);
 	AutomationTimeAxisView* atv = 0;
 
 	/* no action if we're recording */
@@ -1139,6 +1139,8 @@ Editor::button_release_handler (ArdourCanvas::Item* item, GdkEvent* event, ItemT
 		were_dragging = true;
 	}
 
+        update_region_layering_order_editor (where);
+
 	/* edit events get handled here */
 
 	if (!_drags->active () && Keyboard::is_edit_event (&event->button)) {
diff --git a/gtk2_ardour/wscript b/gtk2_ardour/wscript
index 4b24082d47..042fa7cc56 100644
--- a/gtk2_ardour/wscript
+++ b/gtk2_ardour/wscript
@@ -170,6 +170,7 @@ gtk2_ardour_sources = [
 	'rc_option_editor.cc',
 	'region_editor.cc',
 	'region_gain_line.cc',
+	'region_layering_order_editor.cc',
 	'region_selection.cc',
 	'region_view.cc',
 	'return_ui.cc',