diff --git a/gtk2_ardour/editing_context.h b/gtk2_ardour/editing_context.h
index edddd1a7e1..7ee7863c03 100644
--- a/gtk2_ardour/editing_context.h
+++ b/gtk2_ardour/editing_context.h
@@ -146,6 +146,8 @@ public:
 
 	virtual void set_selected_midi_region_view (MidiRegionView&);
 
+	samplecnt_t get_current_zoom () const { return samples_per_pixel; }
+
 	/* NOTE: these functions assume that the "pixel" coordinate is
 	   in canvas coordinates. These coordinates already take into
 	   account any scrolling offsets.
@@ -244,7 +246,6 @@ public:
 
 	virtual void set_zoom_focus (Editing::ZoomFocus) = 0;
 	virtual Editing::ZoomFocus get_zoom_focus () const = 0;
-	virtual samplecnt_t get_current_zoom () const = 0;
 	virtual void reset_zoom (samplecnt_t) = 0;
 	virtual void reposition_and_zoom (samplepos_t, double) = 0;
 
diff --git a/gtk2_ardour/editor.h b/gtk2_ardour/editor.h
index 578f93efb2..0b8786db62 100644
--- a/gtk2_ardour/editor.h
+++ b/gtk2_ardour/editor.h
@@ -281,7 +281,6 @@ public:
 
 	void               set_zoom_focus (Editing::ZoomFocus);
 	Editing::ZoomFocus get_zoom_focus () const { return zoom_focus; }
-	samplecnt_t        get_current_zoom () const { return samples_per_pixel; }
 	void               cycle_zoom_focus ();
 	void temporal_zoom_step (bool zoom_out);
 	void temporal_zoom_step_scale (bool zoom_out, double scale);
diff --git a/gtk2_ardour/ghostregion.cc b/gtk2_ardour/ghostregion.cc
index 5718e2ed05..a92dd3f748 100644
--- a/gtk2_ardour/ghostregion.cc
+++ b/gtk2_ardour/ghostregion.cc
@@ -452,8 +452,8 @@ MidiGhostRegion::model_changed ()
 
 		std::shared_ptr<NoteType> note = i->first;
 		GhostEvent* cne = i->second;
-		const bool visible = (note->note() >= parent_mrv._current_range_min) &&
-			(note->note() <= parent_mrv._current_range_max);
+		const bool visible = (note->note() >= parent_mrv.midi_context().lowest_note()) &&
+			(note->note() <= parent_mrv.midi_context().highest_note());
 
 		if (visible) {
 			if (cne->is_hit) {
diff --git a/gtk2_ardour/midi_cue_background.cc b/gtk2_ardour/midi_cue_background.cc
index 2156b6c073..3243451d55 100644
--- a/gtk2_ardour/midi_cue_background.cc
+++ b/gtk2_ardour/midi_cue_background.cc
@@ -50,6 +50,12 @@ CueMidiBackground::contents_height() const
 	return _height;
 }
 
+double
+CueMidiBackground::height() const
+{
+	return _height;
+}
+
 uint8_t
 CueMidiBackground::get_preferred_midi_channel () const
 {
diff --git a/gtk2_ardour/midi_cue_background.h b/gtk2_ardour/midi_cue_background.h
index 9040db4592..76346c421e 100644
--- a/gtk2_ardour/midi_cue_background.h
+++ b/gtk2_ardour/midi_cue_background.h
@@ -37,6 +37,7 @@ class CueMidiBackground : public MidiViewBackground
 	CueMidiBackground (ArdourCanvas::Item* parent);
 	~CueMidiBackground ();
 
+	double height() const;
 	double contents_height() const;
 
 	uint8_t get_preferred_midi_channel () const;
diff --git a/gtk2_ardour/midi_cue_editor.cc b/gtk2_ardour/midi_cue_editor.cc
index 20e545bcec..220e710a2a 100644
--- a/gtk2_ardour/midi_cue_editor.cc
+++ b/gtk2_ardour/midi_cue_editor.cc
@@ -96,13 +96,7 @@ MidiCueEditor::build_canvas ()
 	rubberband_rect = new ArdourCanvas::Rectangle (hv_scroll_group, ArdourCanvas::Rect (0.0, 0.0, 0.0, 0.0));
 	rubberband_rect->hide();
 
-	ArdourCanvas::Text* hw = new ArdourCanvas::Text (hv_scroll_group);
-	hw->set ("hello, world");
-	hw->set_fill_color (Gtkmm2ext::Color (0xff0000ff));
-
-	std::cerr << "New CMB\n";
 	bg = new CueMidiBackground (hv_scroll_group);
-
 	_canvas_viewport->signal_size_allocate().connect (sigc::mem_fun(*this, &MidiCueEditor::canvas_allocate));
 }
 
@@ -119,7 +113,6 @@ MidiCueEditor::snap_to_grid (timepos_t const & presnap, Temporal::RoundMode dire
 	return snap_to_bbt (presnap, direction, gpref);
 }
 
-
 void
 MidiCueEditor::snap_to_internal (timepos_t& start, Temporal::RoundMode direction, SnapPref pref, bool ensure_snap) const
 {
@@ -198,7 +191,7 @@ MidiCueEditor::viewport()
 }
 
 void
-MidiCueEditor::set_region (std::shared_ptr<ARDOUR::MidiTrack> t, std::shared_ptr<ARDOUR::Region> r)
+MidiCueEditor::set_region (std::shared_ptr<ARDOUR::MidiTrack> t, std::shared_ptr<ARDOUR::MidiRegion> r)
 {
 	// delete view;
 	// view = nullptr;
@@ -207,5 +200,6 @@ MidiCueEditor::set_region (std::shared_ptr<ARDOUR::MidiTrack> t, std::shared_ptr
 		return;
 	}
 
-	// view = new MidiView (t, hv_scroll_group, *this, *bg, 0xff0000ff);
+	view = new MidiView (t, *hv_scroll_group, *this, *bg, 0xff0000ff);
+	view->set_region (r);
 }
diff --git a/gtk2_ardour/midi_cue_editor.h b/gtk2_ardour/midi_cue_editor.h
index 01caf475c0..e36e20ab95 100644
--- a/gtk2_ardour/midi_cue_editor.h
+++ b/gtk2_ardour/midi_cue_editor.h
@@ -62,7 +62,7 @@ class MidiCueEditor : public CueEditor
 	void apply_midi_note_edit_op (ARDOUR::MidiOperator& op, const RegionSelection& rs);
 	PBD::Command* apply_midi_note_edit_op_to_region (ARDOUR::MidiOperator& op, MidiRegionView& mrv);
 
-	void set_region (std::shared_ptr<ARDOUR::MidiTrack>, std::shared_ptr<ARDOUR::Region>);
+	void set_region (std::shared_ptr<ARDOUR::MidiTrack>, std::shared_ptr<ARDOUR::MidiRegion>);
 
   protected:
 	Temporal::timepos_t snap_to_grid (Temporal::timepos_t const & start,
diff --git a/gtk2_ardour/midi_streamview.cc b/gtk2_ardour/midi_streamview.cc
index ae52ecb2ee..272dd3aa30 100644
--- a/gtk2_ardour/midi_streamview.cc
+++ b/gtk2_ardour/midi_streamview.cc
@@ -207,7 +207,6 @@ MidiStreamView::display_track (std::shared_ptr<Track> tr)
 {
 	StreamView::display_track (tr);
 
-	std::cerr << "MSV @ " << this << " dnl\n";
 	draw_note_lines();
 
 	NoteRangeChanged(); /* EMIT SIGNAL*/
diff --git a/gtk2_ardour/midi_view.cc b/gtk2_ardour/midi_view.cc
index 052f6e0867..c86c488ab5 100644
--- a/gtk2_ardour/midi_view.cc
+++ b/gtk2_ardour/midi_view.cc
@@ -120,8 +120,6 @@ MidiView::MidiView (std::shared_ptr<MidiTrack> mt,
 	, _step_edit_cursor (0)
 	, _step_edit_cursor_width (1, 0)
 	, _channel_selection_scoped_note (0)
-	, _current_range_min(0)
-	, _current_range_max(0)
 	, _mouse_state(None)
 	, _pressed_button(0)
 	, _optimization_iterator (_events.end())
@@ -153,8 +151,6 @@ MidiView::MidiView (MidiView const & other)
 	, _step_edit_cursor (0)
 	, _step_edit_cursor_width (1, 0)
 	, _channel_selection_scoped_note (0)
-	, _current_range_min(0)
-	, _current_range_max(0)
 	, _mouse_state(None)
 	, _pressed_button(0)
 	, _optimization_iterator (_events.end())
@@ -233,6 +229,8 @@ MidiView::set_model (std::shared_ptr<MidiModel> m)
 	_editing_context.MouseModeChanged.connect (connections_requiring_model, invalidator (*this),
 	                                            boost::bind (&MidiView::mouse_mode_changed, this),
 	                                            gui_context ());
+
+	model_changed ();
 }
 
 bool
@@ -1005,6 +1003,8 @@ MidiView::redisplay (bool view_only)
 void
 MidiView::model_changed()
 {
+	std::cerr << "MC!\n";
+
 	if (!display_is_enabled()) {
 		return;
 	}
@@ -1045,6 +1045,22 @@ MidiView::model_changed()
 
 	NoteBase* cne;
 
+	std::cerr << "drawing " << notes.size() << " notes\n";
+
+	uint8_t low_note = std::numeric_limits<uint8_t>::max();
+	uint8_t hi_note = std::numeric_limits<uint8_t>::min();
+
+	for (MidiModel::Notes::iterator n = notes.begin(); n != notes.end(); ++n) {
+		if ((*n)->note() < low_note) {
+			low_note = (*n)->note();
+		}
+		if ((*n)->note() > hi_note)  {
+			hi_note = (*n)->note();
+		}
+	}
+
+	_midi_context.apply_note_range (low_note, hi_note, true);
+
 	for (MidiModel::Notes::iterator n = notes.begin(); n != notes.end(); ++n) {
 
 		std::shared_ptr<NoteType> note (*n);
@@ -1445,13 +1461,10 @@ MidiView::set_height (double ht)
 void
 MidiView::apply_note_range (uint8_t min, uint8_t max, bool force)
 {
-	if (!force && _current_range_min == min && _current_range_max == max) {
+	if (!force && _midi_context.lowest_note() == min && _midi_context.highest_note() == max) {
 		return;
 	}
 
-	_current_range_min = min;
-	_current_range_max = max;
-
 	view_changed ();
 }
 
@@ -1548,7 +1561,7 @@ MidiView::note_in_region_range (const std::shared_ptr<NoteType> note, bool& visi
 
 	const bool outside = !note_in_region_time_range (note);
 
-	visible = (note->note() >= _current_range_min) && (note->note() <= _current_range_max);
+	visible = (note->note() >= _midi_context.lowest_note()) && (note->note() <= _midi_context.highest_note());
 
 	return !outside;
 }
@@ -1600,6 +1613,11 @@ MidiView::update_sustained (Note* ev, bool update_ghost_regions)
 	const double y0 = 1 + floor(note_to_y(note->note()));
 	double y1;
 
+	std::cerr << "Note: " << *note << std::endl;
+	std::cerr << "SSS " << session_source_start << std::endl;
+	std::cerr << "nh " << note_height() << std::endl;
+	std::cerr << "vs. " << (int) _midi_context.lowest_note() << " .. " << (int) _midi_context.highest_note() << std::endl;
+
 	if (note->length() == Temporal::Beats()) {
 
 		/* special case actual zero-length notes */
@@ -1618,6 +1636,8 @@ MidiView::update_sustained (Note* ev, bool update_ghost_regions)
 
 		const samplepos_t note_end_samples = _midi_region->position().distance ((session_source_start + note_end)).samples();
 
+		std::cerr << "nes: " << note_end_samples << " Z " << _editing_context.get_current_zoom() << std::endl;
+
 		x1 = std::max(1., _editing_context.sample_to_pixel (note_end_samples));
 
 	} else {
@@ -1629,6 +1649,7 @@ MidiView::update_sustained (Note* ev, bool update_ghost_regions)
 
 	y1 = y0 + std::max(1., floor(note_height()) - 1);
 
+	std::cerr << "note rect " << ArdourCanvas::Rect (x0, y0, x1, y1) << std::endl;
 
 	ev->set (ArdourCanvas::Rect (x0, y0, x1, y1));
 	ev->set_velocity (note->velocity()/127.0);
@@ -4174,10 +4195,10 @@ MidiView::data_recorded (std::weak_ptr<MidiSource> w)
 			nb->item()->set_outline_color (UIConfiguration::instance().color ("recording note"));
 
 			/* fix up our note range */
-			if (ev.note() < _current_range_min) {
-				apply_note_range (ev.note(), _current_range_max, true);
-			} else if (ev.note() > _current_range_max) {
-				apply_note_range (_current_range_min, ev.note(), true);
+			if (ev.note() < _midi_context.lowest_note()) {
+				apply_note_range (ev.note(), _midi_context.highest_note(), true);
+			} else if (ev.note() > _midi_context.highest_note()) {
+				apply_note_range (_midi_context.lowest_note(), ev.note(), true);
 			}
 
 		} else if (ev.type() == MIDI_CMD_NOTE_OFF) {
@@ -4415,28 +4436,6 @@ MidiView::get_draw_length_beats (timepos_t const & pos) const
 	return beats;
 }
 
-uint8_t
-MidiView::y_to_note (double y) const
-{
-	int const n = ((contents_height() - y) / contents_height() * (double)(_current_range_max - _current_range_min + 1))
-		+ _current_range_min;
-
-	if (n < 0) {
-		return 0;
-	} else if (n > 127) {
-		return 127;
-	}
-
-	/* min due to rounding and/or off-by-one errors */
-	return min ((uint8_t) n, _current_range_max);
-}
-
-double
-MidiView::note_to_y(uint8_t note) const
-{
-	return contents_height() - (note + 1 - _current_range_min) * note_height() + 1;
-}
-
 void
 MidiView::quantize_selected_notes ()
 {
@@ -4677,3 +4676,9 @@ MidiView::drag_group () const
 {
 	return _note_group->parent();
 }
+
+double
+MidiView::height() const
+{
+	return _midi_context.height();
+}
diff --git a/gtk2_ardour/midi_view.h b/gtk2_ardour/midi_view.h
index 98b3fde675..842711bc7e 100644
--- a/gtk2_ardour/midi_view.h
+++ b/gtk2_ardour/midi_view.h
@@ -483,9 +483,6 @@ class MidiView : public virtual sigc::trackable
 	Temporal::Beats                      _step_edit_cursor_position;
 	NoteBase*                            _channel_selection_scoped_note;
 
-	uint8_t  _current_range_min;
-	uint8_t  _current_range_max;
-
 	MouseState _mouse_state;
 	int _pressed_button;
 
@@ -577,14 +574,13 @@ class MidiView : public virtual sigc::trackable
 	ARDOUR::ChannelMode get_channel_mode() const;
 	uint16_t get_selected_channels () const;
 
-	virtual double height() const = 0;
+	virtual double height() const;
 
 	virtual double contents_height() const { return height() - 2; }
-	inline double contents_note_range () const { return (double)(_current_range_max - _current_range_min + 1); }
-	inline double note_height() const { return contents_height() / contents_note_range(); }
+	inline double note_height() const { return contents_height() / _midi_context.contents_note_range(); }
 
-	double note_to_y (uint8_t note) const;
-	uint8_t y_to_note (double y) const;
+	double note_to_y (uint8_t note) const { return _midi_context.note_to_y (note); }
+	uint8_t y_to_note (double y) const { return _midi_context.y_to_note (y); }
 
 	void update_patch_changes ();
 	void update_sysexes ();
diff --git a/gtk2_ardour/mixer_strip.cc b/gtk2_ardour/mixer_strip.cc
index 076b6da25a..3482c172e4 100644
--- a/gtk2_ardour/mixer_strip.cc
+++ b/gtk2_ardour/mixer_strip.cc
@@ -115,7 +115,6 @@ MixerStrip::MixerStrip (Mixer_UI& mx, Session* sess, bool in_mixer)
 	, processor_box (sess, boost::bind (&MixerStrip::plugin_selector, this), mx.selection(), this, in_mixer)
 	, gpm (sess, 250)
 	, panners (sess)
-	, trigger_display (-1., TriggerBox::default_triggers_per_box*16.)
 	, button_size_group (Gtk::SizeGroup::create (Gtk::SIZE_GROUP_HORIZONTAL))
 	, rec_mon_table (2, 2)
 	, solo_iso_table (1, 2)
@@ -153,7 +152,6 @@ MixerStrip::MixerStrip (Mixer_UI& mx, Session* sess, std::shared_ptr<Route> rt,
 	, processor_box (sess, boost::bind (&MixerStrip::plugin_selector, this), mx.selection(), this, in_mixer)
 	, gpm (sess, 250)
 	, panners (sess)
-	, trigger_display (-1., 8*16.)
 	, button_size_group (Gtk::SizeGroup::create (Gtk::SIZE_GROUP_HORIZONTAL))
 	, rec_mon_table (2, 2)
 	, solo_iso_table (1, 2)
@@ -335,7 +333,6 @@ MixerStrip::init ()
 	global_vpacker.pack_start (name_button, Gtk::PACK_SHRINK);
 	global_vpacker.pack_start (input_button_box, Gtk::PACK_SHRINK);
 	global_vpacker.pack_start (invert_button_box, Gtk::PACK_SHRINK);
-	global_vpacker.pack_start (trigger_display, Gtk::PACK_SHRINK);
 	global_vpacker.pack_start (_tmaster_widget, Gtk::PACK_SHRINK);
 	global_vpacker.pack_start (processor_box, true, true);
 	global_vpacker.pack_start (panners, Gtk::PACK_SHRINK);
@@ -425,7 +422,6 @@ MixerStrip::init ()
 	_visibility.add (&output_button, X_("Output"), _("Output"), false);
 	_visibility.add (&_comment_button, X_("Comments"), _("Comments"), false);
 	_visibility.add (&control_slave_ui, X_("VCA"), _("VCA Assigns"), false);
-	_visibility.add (&trigger_display, X_("TriggerGrid"), _("Trigger Grid"), false);
 	_visibility.add (&_tmaster_widget, X_("TriggerMaster"), _("Trigger Master"), false);
 
 	parameter_changed (X_("mixer-element-visibility"));
@@ -542,8 +538,6 @@ MixerStrip::set_route (std::shared_ptr<Route> rt)
 
 	RouteUI::set_route (rt);
 
-	set_trigger_display (rt->triggerbox());
-
 	control_slave_ui.set_stripable (std::dynamic_pointer_cast<Stripable> (rt));
 
 	/* ProcessorBox needs access to _route so that it can read
@@ -1683,8 +1677,6 @@ MixerStrip::revert_to_default_display ()
 	}
 
 	reset_strip_style ();
-
-	set_trigger_display (_route->triggerbox());
 }
 
 void
@@ -2140,9 +2132,3 @@ MixerStrip::hide_master_spacer (bool yn)
 	}
 }
 
-void
-MixerStrip::set_trigger_display (std::shared_ptr<TriggerBox> tb)
-{
-	_tmaster->set_triggerbox (tb);
-	trigger_display.set_triggerbox (tb.get());
-}
diff --git a/gtk2_ardour/mixer_strip.h b/gtk2_ardour/mixer_strip.h
index 3df6071b6d..203ad3919a 100644
--- a/gtk2_ardour/mixer_strip.h
+++ b/gtk2_ardour/mixer_strip.h
@@ -192,7 +192,6 @@ private:
 	ProcessorBox processor_box;
 	GainMeter    gpm;
 	PannerUI     panners;
-	TriggerBoxWidget trigger_display;
 
 	Glib::RefPtr<Gtk::SizeGroup> button_size_group;
 
diff --git a/gtk2_ardour/slot_properties_box.cc b/gtk2_ardour/slot_properties_box.cc
index c081c7720b..0eb618e0bd 100644
--- a/gtk2_ardour/slot_properties_box.cc
+++ b/gtk2_ardour/slot_properties_box.cc
@@ -756,7 +756,6 @@ SlotPropertyWindow::SlotPropertyWindow (TriggerReference tref)
 			_trig_box->set_trigger (tref);
 
 			_midi_editor = new MidiCueEditor;
-			_midi_editor->set_region (std::shared_ptr<MidiTrack>(), trigger->region());
 
 			table->attach(*_trig_box,  col, col+1, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );  col++;
 			table->attach(_midi_editor->viewport(),   col, col+1, 0, 1, Gtk::FILL|Gtk::EXPAND, Gtk::FILL|Gtk::EXPAND );  col++;
diff --git a/gtk2_ardour/trigger_page.cc b/gtk2_ardour/trigger_page.cc
index 37e4aed22b..09e585d902 100644
--- a/gtk2_ardour/trigger_page.cc
+++ b/gtk2_ardour/trigger_page.cc
@@ -39,6 +39,7 @@
 #include "ardour/region_factory.h"
 #include "ardour/profile.h"
 #include "ardour/smf_source.h"
+#include "ardour/stripable.h"
 
 #include "actions.h"
 #include "ardour_ui.h"
@@ -410,8 +411,12 @@ TriggerPage::selection_changed ()
 				_midi_trig_box.set_trigger (ref);
 				_midi_trig_box.show ();
 
-				// _midi_trim_box.set_trigger (ref);
-				_midi_editor->viewport().show ();
+				std::shared_ptr<MidiRegion> mr = std::dynamic_pointer_cast<MidiRegion> (trigger->region());
+				if (mr) {
+					std::shared_ptr<MidiTrack> mt = std::dynamic_pointer_cast<MidiTrack> (entry->strip().stripable());
+					_midi_editor->set_region (mt, mr);
+					_midi_editor->viewport().show ();
+				}
 			}
 		}
 		_parameter_box.show ();
diff --git a/gtk2_ardour/trigger_strip.cc b/gtk2_ardour/trigger_strip.cc
index 67e5f91d57..f246215cfd 100644
--- a/gtk2_ardour/trigger_strip.cc
+++ b/gtk2_ardour/trigger_strip.cc
@@ -65,7 +65,7 @@ TriggerStrip::TriggerStrip (Session* s, std::shared_ptr<ARDOUR::Route> rt)
 	, _pb_selection ()
 	, _tmaster_widget (-1, 16)
 	, _processor_box (s, boost::bind (&TriggerStrip::plugin_selector, this), _pb_selection, 0)
-	, _trigger_display (-1., TriggerBox::default_triggers_per_box * 16.)
+	, _trigger_display (*this, -1., TriggerBox::default_triggers_per_box * 16.)
 	, _panners (s)
 	, _level_meter (s)
 {
diff --git a/gtk2_ardour/triggerbox_ui.cc b/gtk2_ardour/triggerbox_ui.cc
index db7a552303..ca424f7a4b 100644
--- a/gtk2_ardour/triggerbox_ui.cc
+++ b/gtk2_ardour/triggerbox_ui.cc
@@ -65,8 +65,9 @@ using namespace ArdourCanvas;
 using namespace Gtkmm2ext;
 using namespace PBD;
 
-TriggerEntry::TriggerEntry (Item* item, TriggerReference tr)
+TriggerEntry::TriggerEntry (Item* item, TriggerStrip& s, TriggerReference tr)
 	: ArdourCanvas::Rectangle (item)
+	, _strip (s)
 	, _grabbed (false)
 	, _drag_active (false)
 {
@@ -826,9 +827,10 @@ TriggerEntry::drag_data_get (Glib::RefPtr<Gdk::DragContext> const&, Gtk::Selecti
 
 Glib::RefPtr<Gtk::TargetList> TriggerBoxUI::_dnd_src;
 
-TriggerBoxUI::TriggerBoxUI (ArdourCanvas::Item* parent, TriggerBox& tb)
+TriggerBoxUI::TriggerBoxUI (ArdourCanvas::Item* parent, TriggerStrip& s, TriggerBox& tb)
 	: Rectangle (parent)
 	, _triggerbox (tb)
+	, _strip (s)
 {
 	set_layout_sensitive (true); // why???
 
@@ -894,7 +896,7 @@ TriggerBoxUI::build ()
 		if (!t) {
 			break;
 		}
-		TriggerEntry* te = new TriggerEntry (this, TriggerReference (_triggerbox, n));
+		TriggerEntry* te = new TriggerEntry (this, _strip, TriggerReference (_triggerbox, n));
 
 		_slots.push_back (te);
 
@@ -1031,9 +1033,10 @@ TriggerBoxUI::drag_data_received (Glib::RefPtr<Gdk::DragContext> const& context,
 
 /* ********************************************** */
 
-TriggerBoxWidget::TriggerBoxWidget (float w, float h)
+TriggerBoxWidget::TriggerBoxWidget (TriggerStrip& s, float w, float h)
 	: FittedCanvasWidget (w, h)
-	, ui (0)
+	, ui (nullptr)
+	, _strip (s)
 {
 	set_background_color (UIConfiguration::instance ().color (X_("theme:bg")));
 }
@@ -1044,13 +1047,13 @@ TriggerBoxWidget::set_triggerbox (TriggerBox* tb)
 	if (ui) {
 		root ()->remove (ui);
 		delete ui;
-		ui = 0;
+		ui = nullptr;
 	}
 
 	if (!tb) {
 		return;
 	}
 
-	ui = new TriggerBoxUI (root (), *tb);
+	ui = new TriggerBoxUI (root (), _strip, *tb);
 	repeat_size_allocation ();
 }
diff --git a/gtk2_ardour/triggerbox_ui.h b/gtk2_ardour/triggerbox_ui.h
index 6faec16137..6d28f84595 100644
--- a/gtk2_ardour/triggerbox_ui.h
+++ b/gtk2_ardour/triggerbox_ui.h
@@ -43,10 +43,12 @@ namespace ArdourCanvas
 	class Polygon;
 }
 
+class TriggerStrip;
+
 class TriggerEntry : public ArdourCanvas::Rectangle, public TriggerUI
 {
 public:
-	TriggerEntry (ArdourCanvas::Item* item, ARDOUR::TriggerReference rf);
+	TriggerEntry (ArdourCanvas::Item* item, TriggerStrip&, ARDOUR::TriggerReference rf);
 	~TriggerEntry ();
 
 	ArdourCanvas::Rectangle* play_button;
@@ -76,7 +78,10 @@ public:
 
 	bool name_button_event (GdkEvent*);
 
+	TriggerStrip& strip() const { return _strip; }
+
 private:
+	TriggerStrip& _strip;
 	bool   _grabbed;
 	double _poly_size;
 	double _poly_margin;
@@ -104,11 +109,13 @@ private:
 class TriggerBoxUI : public ArdourCanvas::Rectangle
 {
 public:
-	TriggerBoxUI (ArdourCanvas::Item* parent, ARDOUR::TriggerBox&);
+	TriggerBoxUI (ArdourCanvas::Item* parent, TriggerStrip&, ARDOUR::TriggerBox&);
 	~TriggerBoxUI ();
 
 	void _size_allocate (ArdourCanvas::Rect const&);
 
+	TriggerStrip& strip() const { return _strip; }
+
 	static Glib::RefPtr<Gtk::TargetList> dnd_src ()
 	{
 		return _dnd_src;
@@ -119,6 +126,7 @@ private:
 
 	ARDOUR::TriggerBox& _triggerbox;
 	Slots               _slots;
+	TriggerStrip&       _strip;
 
 	static Glib::RefPtr<Gtk::TargetList> _dnd_src;
 
@@ -140,12 +148,14 @@ private:
 class TriggerBoxWidget : public FittedCanvasWidget
 {
 public:
-	TriggerBoxWidget (float w, float h);
+	TriggerBoxWidget (TriggerStrip&, float w, float h);
 
 	void set_triggerbox (ARDOUR::TriggerBox* tb);
+	TriggerStrip& strip() const { return _strip; }
 
 private:
 	TriggerBoxUI* ui;
+	TriggerStrip& _strip;
 };
 
 #endif
diff --git a/gtk2_ardour/view_background.h b/gtk2_ardour/view_background.h
index 27783d415b..80d59d84e5 100644
--- a/gtk2_ardour/view_background.h
+++ b/gtk2_ardour/view_background.h
@@ -40,6 +40,7 @@ class ViewBackground
 	ViewBackground ();
 	virtual ~ViewBackground ();
 
+	virtual double height() const { return 0.; }
 	virtual double contents_height() const { return 0.; }
 
 	/** @return y position, or -1 if hidden */