From b5c0f55831a113cdd335634b00a302d68454f33e Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 28 Sep 2021 17:45:58 -0600
Subject: [PATCH] triggerboxui: start connecting more widgets to trigger API

---
 gtk2_ardour/trigger_ui.cc | 30 ++++++++++++++++++++++++++++--
 gtk2_ardour/trigger_ui.h  |  8 ++++++--
 2 files changed, 34 insertions(+), 4 deletions(-)

diff --git a/gtk2_ardour/trigger_ui.cc b/gtk2_ardour/trigger_ui.cc
index 2a194393c4..b224af7a29 100644
--- a/gtk2_ardour/trigger_ui.cc
+++ b/gtk2_ardour/trigger_ui.cc
@@ -83,6 +83,7 @@ TriggerUI::TriggerUI (Item* parent, Trigger& t)
 
 	follow_action_button = new ArdourCanvas::Widget (canvas(), *_follow_action_button);
 	follow_action_button->name = "FollowAction";
+	_follow_action_button->signal_event().connect (sigc::mem_fun (*this, (&TriggerUI::follow_action_button_event)));
 
 	_follow_left = new ArdourDropdown;
 	_follow_left->append_text_item (_("None"));
@@ -114,13 +115,35 @@ TriggerUI::TriggerUI (Item* parent, Trigger& t)
 	set_fill_color (UIConfiguration::instance().color (X_("theme:bg")));
 	name = "triggerUI-table";
 
-	trigger_changed ();
+	PropertyChange pc;
+
+	pc.add (Properties::use_follow);
+	pc.add (Properties::legato);
+
+	trigger_changed (pc);
+
+	trigger.PropertyChanged.connect (trigger_connections, invalidator (*this), boost::bind (&TriggerUI::trigger_changed, this, _1), gui_context());
 }
 
 TriggerUI::~TriggerUI ()
 {
 }
 
+bool
+TriggerUI::follow_action_button_event (GdkEvent* ev)
+{
+	switch (ev->type) {
+	case GDK_BUTTON_PRESS:
+		trigger.set_use_follow (!trigger.use_follow());
+		return true;
+
+	default:
+		break;
+	}
+
+	return false;
+}
+
 std::string
 TriggerUI::follow_action_to_string (Trigger::FollowAction fa)
 {
@@ -149,8 +172,11 @@ TriggerUI::follow_action_to_string (Trigger::FollowAction fa)
 }
 
 void
-TriggerUI::trigger_changed ()
+TriggerUI::trigger_changed (PropertyChange pc)
 {
+	if (pc.contains (Properties::use_follow)) {
+		_follow_action_button->set_active_state (trigger.use_follow() ? Gtkmm2ext::ExplicitActive : Gtkmm2ext::Off);
+	}
 	_follow_right->set_text (follow_action_to_string (trigger.follow_action (0)));
 	_follow_left->set_text (follow_action_to_string (trigger.follow_action (1)));
 }
diff --git a/gtk2_ardour/trigger_ui.h b/gtk2_ardour/trigger_ui.h
index 60c49aa4c5..30d4fbe631 100644
--- a/gtk2_ardour/trigger_ui.h
+++ b/gtk2_ardour/trigger_ui.h
@@ -36,7 +36,7 @@ namespace ArdourCanvas {
 	class Rectangle;
 };
 
-class TriggerUI : public ArdourCanvas::Table
+class TriggerUI : public ArdourCanvas::Table, public sigc::trackable
 {
   public:
 	TriggerUI (ArdourCanvas::Item* parent, ARDOUR::Trigger&);
@@ -73,7 +73,11 @@ class TriggerUI : public ArdourCanvas::Table
 	ArdourCanvas::Rectangle* velocity;
 	ArdourCanvas::Rectangle* velocity_text;
 
-	void trigger_changed ();
+	void trigger_changed (PBD::PropertyChange);
+
+	bool follow_action_button_event (GdkEvent*);
+
+	PBD::ScopedConnectionList trigger_connections;
 
 	static std::string follow_action_to_string (ARDOUR::Trigger::FollowAction);
 	static ARDOUR::Trigger::FollowAction  string_to_follow_action (std::string const &);