From f4009e0e095f8bac18a877c54f55dc66380a086e Mon Sep 17 00:00:00 2001
From: Ben Loftis <ben@harrisonconsoles.com>
Date: Thu, 16 Dec 2021 10:40:03 -0600
Subject: [PATCH] triggerbox: display pass_thru state and allow control via
 context menu

---
 gtk2_ardour/trigger_master.cc | 86 +++++++++++++++++++++++++++++++++--
 gtk2_ardour/trigger_master.h  |  4 ++
 2 files changed, 87 insertions(+), 3 deletions(-)

diff --git a/gtk2_ardour/trigger_master.cc b/gtk2_ardour/trigger_master.cc
index de91bdf25a..5070ba6c4c 100644
--- a/gtk2_ardour/trigger_master.cc
+++ b/gtk2_ardour/trigger_master.cc
@@ -107,14 +107,80 @@ Loopster::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons
 	float degrees = slices * deg_per_slice;
 	float radians = (degrees/180)*M_PI;
 	set_source_rgba (context, rgba_to_color (0,0,0,1));
-	context->arc ( size/2, size/2, size/2 - 5*scale, 1.5*M_PI+radians, 1.5*M_PI+2*M_PI );  //arrow head
+	context->arc ( size/2, size/2, size/2 - 5*scale, 1.5*M_PI+radians, 1.5*M_PI+2*M_PI );
 	context->stroke();
 
 	context->set_line_width(1);
 	context->set_identity_matrix();
 }
 
-//========================
+/* ========================  */
+
+class PassThru : public ArdourCanvas::Rectangle
+{
+  public:
+	PassThru (ArdourCanvas::Item* canvas);
+
+	void render (ArdourCanvas::Rect const & area, Cairo::RefPtr<Cairo::Context> context) const;
+	void set_enabled (bool e);
+  private:
+	bool _enabled;
+};
+
+PassThru::PassThru (Item* parent)
+	: ArdourCanvas::Rectangle (parent)
+{
+	set_enabled(false);
+}
+
+void
+PassThru::set_enabled (bool e)
+{
+	if (e != _enabled) {
+		_enabled = e;
+		redraw();
+	}
+}
+
+void
+PassThru::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
+{
+	/* Note that item_to_window() already takes _position into account (as
+	   part of item_to_canvas()
+	*/
+	Rect self (item_to_window (_rect));
+	const Rect draw = self.intersection (area);
+
+	if (!draw) {
+		return;
+	}
+
+	context->set_identity_matrix();
+	context->translate (self.x0, self.y0-0.5);
+
+	float size = _rect.height();
+
+	const double scale = UIConfiguration::instance().get_ui_scale();
+
+	if (_enabled) {
+		//outer white circle
+		set_source_rgba (context, rgba_to_color (1,1,1,1));
+		context->arc ( size/2, size/2, size/2 - 3*scale, 0, 2*M_PI );
+		context->fill();
+
+		//black circle
+		set_source_rgba (context, rgba_to_color (0,0,0,1));
+		context->arc ( size/2, size/2, size/2 - 5*scale, 0, 2*M_PI );
+		context->fill();
+
+		//inner white circle
+		set_source_rgba (context, rgba_to_color (1,1,1,1));
+		context->arc ( size/2, size/2, size/2 - 7*scale, 0, 2*M_PI );
+		context->fill();
+	}
+}
+
+/* ========================  */
 
 
 TriggerMaster::TriggerMaster (Item* parent)
@@ -132,6 +198,7 @@ TriggerMaster::TriggerMaster (Item* parent)
 	name_text->set_ignore_events (false);
 
 	_loopster = new Loopster(this);
+	_passthru = new PassThru(this);
 
 	/* trigger changes
 	_triggerbox->PropertyChanged.connect (trigger_prop_connection, MISSING_INVALIDATOR, boost::bind (&TriggerMaster::prop_change, this, _1), gui_context());
@@ -321,7 +388,11 @@ TriggerMaster::context_menu ()
 	Menu* load_menu = manage (new Menu);
 	MenuList& loitems (load_menu->items());
 
-	items.push_back (MenuElem (_("Toggle Monitor Thru"), sigc::mem_fun (*this, &TriggerMaster::maybe_update)));  //ToDo
+	items.push_back (CheckMenuElem (_("Toggle Monitor Thru"), sigc::mem_fun (*this, &TriggerMaster::toggle_thru)));
+	if (_triggerbox->pass_thru()) {
+		dynamic_cast<Gtk::CheckMenuItem*> (&items.back ())->set_active (true);
+	}
+
 	items.push_back (MenuElem (_("Enable/Disable..."), sigc::mem_fun (*this, &TriggerMaster::maybe_update)));  //ToDo
 	items.push_back (MenuElem (_("Follow Action..."), *follow_menu));
 	items.push_back (MenuElem (_("Launch Style..."), *launch_menu));
@@ -331,6 +402,12 @@ TriggerMaster::context_menu ()
 	_context_menu->popup (1, gtk_get_current_event_time());
 }
 
+void
+TriggerMaster::toggle_thru ()
+{
+	_triggerbox->set_pass_thru(!_triggerbox->pass_thru());
+}
+
 void
 TriggerMaster::set_all_follow_action (Trigger::FollowAction fa)
 {
@@ -380,6 +457,7 @@ TriggerMaster::_size_allocate (ArdourCanvas::Rect const & alloc)
 	name_text->clamp_width (twidth);
 
 	_loopster->set(ArdourCanvas::Rect(0, 0, height, height));
+	_passthru->set(ArdourCanvas::Rect(width-height, 0, width, height));
 
 	//font scale may have changed. uiconfig 'embeds' the ui-scale in the font
 	name_text->set_font_description (UIConfiguration::instance().get_NormalFont());
@@ -392,6 +470,8 @@ TriggerMaster::prop_change (PropertyChange const & change)
 		return;
 	}
 
+	_passthru->set_enabled(_triggerbox->pass_thru ());
+
 	std::string text;
 
 	ARDOUR::Trigger *trigger = _triggerbox->currently_playing();
diff --git a/gtk2_ardour/trigger_master.h b/gtk2_ardour/trigger_master.h
index f83ac0665c..5edf5b71d3 100644
--- a/gtk2_ardour/trigger_master.h
+++ b/gtk2_ardour/trigger_master.h
@@ -59,6 +59,8 @@ class Loopster : public ArdourCanvas::Rectangle
 	float _fraction;
 };
 
+class PassThru;
+
 class TriggerMaster : public ArdourCanvas::Rectangle
 {
   public:
@@ -73,12 +75,14 @@ class TriggerMaster : public ArdourCanvas::Rectangle
 
 	ArdourCanvas::Text*    name_text;
 
+	void toggle_thru ();
 	void maybe_update ();
 	bool event_handler (GdkEvent*);
 	void selection_change ();
 
   private:
 	Loopster* _loopster;
+	PassThru* _passthru;
 
 	Gtk::Menu* _context_menu;
 	void context_menu ();