From 45b5c9667e8b2d50250cd6d2846f9e0905fb1e84 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 18 May 2016 15:56:52 -0400
Subject: basics of spill control in place (actual change in mixer display, not
 done)

---
 gtk2_ardour/mixer_ui.cc         | 16 +++++++++++++
 gtk2_ardour/mixer_ui.h          |  6 +++++
 gtk2_ardour/vca_master_strip.cc | 51 +++++++++++++++++++++--------------------
 gtk2_ardour/vca_master_strip.h  |  2 ++
 4 files changed, 50 insertions(+), 25 deletions(-)

diff --git a/gtk2_ardour/mixer_ui.cc b/gtk2_ardour/mixer_ui.cc
index 437bdf515a..0c70668d51 100644
--- a/gtk2_ardour/mixer_ui.cc
+++ b/gtk2_ardour/mixer_ui.cc
@@ -2663,3 +2663,19 @@ Mixer_UI::do_vca_unassign (boost::shared_ptr<VCA> vca)
 	/* call protected MixerActor:: method */
 	vca_unassign (vca);
 }
+
+void
+Mixer_UI::show_vca_slaves (boost::shared_ptr<VCA> vca)
+{
+	boost::shared_ptr<VCA> v = spilled_vca.lock();
+	if (v != vca) {
+		spilled_vca = vca;
+		show_vca_change (vca); /* EMIT SIGNAL */
+	}
+}
+
+bool
+Mixer_UI::showing_vca_slaves_for (boost::shared_ptr<VCA> vca) const
+{
+       return vca == spilled_vca.lock();
+}
diff --git a/gtk2_ardour/mixer_ui.h b/gtk2_ardour/mixer_ui.h
index 413e5900f3..465324deb2 100644
--- a/gtk2_ardour/mixer_ui.h
+++ b/gtk2_ardour/mixer_ui.h
@@ -115,6 +115,10 @@ class Mixer_UI : public Gtkmm2ext::Tabbable, public PBD::ScopedConnectionList, p
 
 	void do_vca_assign (boost::shared_ptr<ARDOUR::VCA>);
 	void do_vca_unassign (boost::shared_ptr<ARDOUR::VCA>);
+	void show_vca_slaves (boost::shared_ptr<ARDOUR::VCA>);
+	bool showing_vca_slaves_for (boost::shared_ptr<ARDOUR::VCA>) const;
+
+	sigc::signal1<void,boost::shared_ptr<ARDOUR::VCA> > show_vca_change;
 
   protected:
 	void set_route_targets_for_operation ();
@@ -365,6 +369,8 @@ class Mixer_UI : public Gtkmm2ext::Tabbable, public PBD::ScopedConnectionList, p
 
 	// true if mixer list is visible
 	bool _show_mixer_list;
+
+	mutable boost::weak_ptr<ARDOUR::VCA> spilled_vca;
 };
 
 #endif /* __ardour_mixer_ui_h__ */
diff --git a/gtk2_ardour/vca_master_strip.cc b/gtk2_ardour/vca_master_strip.cc
index aeef39e924..e40dd96ba3 100644
--- a/gtk2_ardour/vca_master_strip.cc
+++ b/gtk2_ardour/vca_master_strip.cc
@@ -31,6 +31,7 @@
 #include "ardour_dialog.h"
 #include "floating_text_entry.h"
 #include "gui_thread.h"
+#include "mixer_ui.h"
 #include "tooltips.h"
 #include "ui_config.h"
 #include "vca_master_strip.h"
@@ -46,30 +47,6 @@ using std::string;
 
 PBD::Signal1<void,VCAMasterStrip*> VCAMasterStrip::CatchDeletion;
 
-static string
-verticalize (string const & str)
-{
-	return str;
-#if 0
-	string ret;
-	string::const_iterator s = str.begin();
-	ret = *s;
-	ret += '\n';
-	++s;
-
-	while (s != str.end()) {
-		ret += *s;
-		ret += '\n';
-		++s;
-	}
-
-	/* remove terminal newline */
-
-	ret.erase (ret.length() - 1, string::npos);
-	return ret;
-#endif
-}
-
 VCAMasterStrip::VCAMasterStrip (Session* s, boost::shared_ptr<VCA> v)
 	: AxisView (s)
 	, _vca (v)
@@ -124,6 +101,7 @@ VCAMasterStrip::VCAMasterStrip (Session* s, boost::shared_ptr<VCA> v)
 	/* horizontally centered, with a little space (5%) at the top */
 	vertical_button.set_angle (90);
 	vertical_button.set_layout_font (UIConfiguration::instance().get_NormalBoldFont());
+	vertical_button.signal_clicked.connect (sigc::mem_fun (*this, &VCAMasterStrip::spill));
 
 	global_vpacker.set_border_width (1);
 	global_vpacker.set_spacing (0);
@@ -166,6 +144,8 @@ VCAMasterStrip::VCAMasterStrip (Session* s, boost::shared_ptr<VCA> v)
 	solo_changed ();
 	mute_changed ();
 
+	Mixer_UI::instance()->show_vca_change.connect (sigc::mem_fun (*this, &VCAMasterStrip::spill_change));
+
 	/* this remains unchanged as the name changes */
 	name_button.set_text (string_compose (X_("VCA %1"), _vca->number()));
 
@@ -485,7 +465,8 @@ VCAMasterStrip::vca_property_changed (PropertyChange const & what_changed)
 void
 VCAMasterStrip::update_vca_name ()
 {
-	vertical_button.set_text (verticalize (short_version (_vca->name(), 15)));
+	/* 20 is a rough guess at the number of letters we can fit. */
+	vertical_button.set_text (short_version (_vca->name(), 20));
 }
 
 void
@@ -497,3 +478,23 @@ VCAMasterStrip::build_context_menu ()
 	items.push_back (MenuElem (_("Rename"), sigc::mem_fun (*this, &VCAMasterStrip::start_name_edit)));
 	items.push_back (MenuElem (_("Remove")));
 }
+
+void
+VCAMasterStrip::spill ()
+{
+	if (Mixer_UI::instance()->showing_vca_slaves_for (_vca)) {
+		Mixer_UI::instance()->show_vca_slaves (boost::shared_ptr<VCA>());
+	} else {
+		Mixer_UI::instance()->show_vca_slaves (_vca);
+	}
+}
+
+void
+VCAMasterStrip::spill_change (boost::shared_ptr<VCA> vca)
+{
+	if (vca != _vca) {
+		vertical_button.set_active_state (Gtkmm2ext::Off);
+	} else {
+		vertical_button.set_active_state (Gtkmm2ext::ExplicitActive);
+	}
+}
diff --git a/gtk2_ardour/vca_master_strip.h b/gtk2_ardour/vca_master_strip.h
index 0c752cbeec..4734061987 100644
--- a/gtk2_ardour/vca_master_strip.h
+++ b/gtk2_ardour/vca_master_strip.h
@@ -70,6 +70,8 @@ class VCAMasterStrip : public AxisView, public Gtk::EventBox
 	Gtk::MessageDialog* delete_dialog;
 	ArdourButton vertical_button;
 
+	void spill ();
+	void spill_change (boost::shared_ptr<ARDOUR::VCA>);
 	void hide_clicked();
 	bool width_button_pressed (GdkEventButton *);
 	void set_selected (bool);
-- 
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