From fe7c36c04b805252a9ac057244b05d84469f7ba7 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Thu, 27 Jul 2023 13:30:50 -0600
Subject: [PATCH] allow selection-as-group control of trim controls

---
 gtk2_ardour/mixer_strip.cc | 23 +++++++++++++++++++++--
 gtk2_ardour/mixer_strip.h  |  2 ++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/gtk2_ardour/mixer_strip.cc b/gtk2_ardour/mixer_strip.cc
index 254d3dd963..c4344278bb 100644
--- a/gtk2_ardour/mixer_strip.cc
+++ b/gtk2_ardour/mixer_strip.cc
@@ -503,8 +503,18 @@ void
 MixerStrip::trim_start_touch (int)
 {
 	assert (_route && _session);
+
 	if (route()->trim() && route()->trim()->active() && route()->n_inputs().n_audio() > 0) {
-		route()->trim()->gain_control ()->start_touch (timepos_t (_session->transport_sample()));
+
+		std::shared_ptr<AutomationControl> control (route()->trim()->gain_control());
+
+		if (maybe_use_select_as_group ()) {
+			_touch_control_group.reset (new GainControlGroup (TrimAutomation));
+			_touch_control_group->set_mode (ControlGroup::Relative);
+			_touch_control_group->fill_from_selection (control->session().selection(), control->parameter());
+		}
+
+		control->start_touch (timepos_t (_session->transport_sample()));
 	}
 }
 
@@ -512,8 +522,17 @@ void
 MixerStrip::trim_end_touch (int)
 {
 	assert (_route && _session);
+
 	if (route()->trim() && route()->trim()->active() && route()->n_inputs().n_audio() > 0) {
-		route()->trim()->gain_control ()->stop_touch (timepos_t (_session->transport_sample()));
+
+		std::shared_ptr<AutomationControl> control (route()->trim()->gain_control());
+
+		control->stop_touch (timepos_t (_session->transport_sample()));
+
+		if (_touch_control_group) {
+			_touch_control_group->pop_all ();
+			_touch_control_group.reset ();
+		}
 	}
 }
 
diff --git a/gtk2_ardour/mixer_strip.h b/gtk2_ardour/mixer_strip.h
index 946deeb6cc..14c0a85af4 100644
--- a/gtk2_ardour/mixer_strip.h
+++ b/gtk2_ardour/mixer_strip.h
@@ -243,6 +243,8 @@ private:
 	void trim_start_touch (int);
 	void trim_end_touch (int);
 
+	std::shared_ptr<ARDOUR::ControlGroup> _touch_control_group;
+
 	void setup_comment_button ();
 
 	void loudess_analysis_button_clicked ();