From 24b916d125400b28d2eca2268e29ac001db80d41 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 26 Sep 2024 18:52:31 +0200
Subject: [PATCH] Touch Support for Ardour Button

---
 libs/widgets/ardour_button.cc        | 38 ++++++++++++++++++++++++++++
 libs/widgets/widgets/ardour_button.h |  2 ++
 2 files changed, 40 insertions(+)

diff --git a/libs/widgets/ardour_button.cc b/libs/widgets/ardour_button.cc
index a400b9df22..f31ed74827 100644
--- a/libs/widgets/ardour_button.cc
+++ b/libs/widgets/ardour_button.cc
@@ -103,6 +103,7 @@ ArdourButton::ArdourButton (Element e, bool toggle)
 	UIConfigurationBase::instance().ColorsChanged.connect (sigc::mem_fun (*this, &ArdourButton::color_handler));
 	/* This is not provided by gtkmm */
 	signal_grab_broken_event().connect (sigc::mem_fun (*this, &ArdourButton::on_grab_broken_event));
+	add_events (Gdk::TOUCH_BEGIN_MASK | Gdk::TOUCH_END_MASK);
 }
 
 ArdourButton::ArdourButton (const std::string& str, Element e, bool toggle)
@@ -154,6 +155,7 @@ ArdourButton::ArdourButton (const std::string& str, Element e, bool toggle)
 	UIConfigurationBase::instance().DPIReset.connect (sigc::mem_fun (*this, &ArdourButton::on_name_changed));
 	/* This is not provided by gtkmm */
 	signal_grab_broken_event().connect (sigc::mem_fun (*this, &ArdourButton::on_grab_broken_event));
+	add_events (Gdk::TOUCH_BEGIN_MASK | Gdk::TOUCH_END_MASK);
 }
 
 ArdourButton::~ArdourButton()
@@ -943,6 +945,42 @@ ArdourButton::set_led_left (bool yn)
 	_led_left = yn;
 }
 
+bool
+ArdourButton::on_touch_begin_event (GdkEventTouch *ev)
+{
+	printf ("ArdourButton::on_touch_begin_event finger %d\n", ev->sequence);
+	focus_handler (this);
+
+	CairoWidget::set_dirty ();
+
+	if (!_act_on_release) {
+		if (_action) {
+			_action->activate ();
+		} else if (_auto_toggle) {
+			set_active (!get_active ());
+			signal_clicked ();
+		}
+	}
+	return true;
+}
+
+bool
+ArdourButton::on_touch_end_event (GdkEventTouch *ev)
+{
+	printf ("ArdourButton::on_touch_end_event finger: %d\n", ev->sequence);
+	CairoWidget::set_dirty ();
+
+	if (_act_on_release && _auto_toggle && !_action) {
+		set_active (!get_active ());
+	}
+	signal_clicked ();
+	if (_act_on_release && _action) {
+		_action->activate ();
+	}
+
+	return true;
+}
+
 bool
 ArdourButton::on_button_press_event (GdkEventButton *ev)
 {
diff --git a/libs/widgets/widgets/ardour_button.h b/libs/widgets/widgets/ardour_button.h
index ad998ebe6c..3681acaa9b 100644
--- a/libs/widgets/widgets/ardour_button.h
+++ b/libs/widgets/widgets/ardour_button.h
@@ -124,6 +124,8 @@ class LIBWIDGETS_API ArdourButton : public CairoWidget , public Gtkmm2ext::Activ
 
 	bool on_button_press_event (GdkEventButton*);
 	bool on_button_release_event (GdkEventButton*);
+	bool on_touch_begin_event (GdkEventTouch*);
+	bool on_touch_end_event (GdkEventTouch*);
 
 	void set_image (const Glib::RefPtr<Gdk::Pixbuf>&);