From 183351f33359b0d110dcc12a8121b6fac112bc14 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sun, 23 Jul 2017 19:40:20 +0200
Subject: [PATCH] Add touch-events signal emission to ArdourKnob

---
 libs/widgets/ardour_knob.cc        | 4 ++++
 libs/widgets/widgets/ardour_knob.h | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/libs/widgets/ardour_knob.cc b/libs/widgets/ardour_knob.cc
index 40adeb7d90..6f673c5c67 100644
--- a/libs/widgets/ardour_knob.cc
+++ b/libs/widgets/ardour_knob.cc
@@ -393,6 +393,8 @@ ArdourKnob::on_button_press_event (GdkEventButton *ev)
 	if (ev->type != GDK_BUTTON_PRESS) {
 		if (_grabbed) {
 			remove_modal_grab();
+			_grabbed = false;
+			StopGesture ();
 			gdk_pointer_ungrab (GDK_CURRENT_TIME);
 		}
 		return true;
@@ -410,6 +412,7 @@ ArdourKnob::on_button_press_event (GdkEventButton *ev)
 	_tooltip.start_drag();
 	add_modal_grab();
 	_grabbed = true;
+	StartGesture ();
 	gdk_pointer_grab(ev->window,false,
 			GdkEventMask( Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK |Gdk::BUTTON_RELEASE_MASK),
 			NULL,NULL,ev->time);
@@ -421,6 +424,7 @@ ArdourKnob::on_button_release_event (GdkEventButton *ev)
 {
 	_tooltip.stop_drag();
 	_grabbed = false;
+	StopGesture ();
 	remove_modal_grab();
 	gdk_pointer_ungrab (GDK_CURRENT_TIME);
 
diff --git a/libs/widgets/widgets/ardour_knob.h b/libs/widgets/widgets/ardour_knob.h
index c07b0447cb..b424e13a8a 100644
--- a/libs/widgets/widgets/ardour_knob.h
+++ b/libs/widgets/widgets/ardour_knob.h
@@ -91,6 +91,9 @@ public:
 
 	void color_handler ();
 
+	sigc::signal<void> StartGesture;
+	sigc::signal<void> StopGesture;
+
   protected:
 	void render (Cairo::RefPtr<Cairo::Context> const&, cairo_rectangle_t*);
 	void on_size_request (Gtk::Requisition* req);