T: adjust meter count to available inputs

gtk2_ardour/ardour_ui_dependents.cc

@@ -535,7 +535,7 @@ ARDOUR_UI::livetrax_setup_windows ()
 
 	/* meter display */
 
-	livetrax_meters = manage (new LiveTraxMeters (48));
+	livetrax_meters = manage (new LiveTraxMeters);
 	livetrax_meters->show_all ();
 //	livetrax_meter_bar.set_border_width (4);
 	livetrax_meter_bar.pack_start (*livetrax_meters, true, true, 0);

gtk2_ardour/livetrax_meters.cc

@@ -3,6 +3,7 @@
 
 #include "widgets/fastmeter.h"
 
+#include "gui_thread.h"
 #include "livetrax_meters.h"
 #include "ui_config.h"
 
@@ -11,35 +12,53 @@ using namespace ArdourWidgets;
 
 #define PX_SCALE(px) std::max ((float)px, rintf ((float)px* UIConfiguration::instance ().get_ui_scale ()))
 
-LiveTraxMeters::LiveTraxMeters (size_t initial_cnt)
+LiveTraxMeters::LiveTraxMeters ()
 {
 	set_policy (Gtk::POLICY_AUTOMATIC, Gtk::POLICY_NEVER);
 
-	resize (initial_cnt);
+	_meter_box.set_border_width (PX_SCALE (10));
+	_meter_box.set_spacing (PX_SCALE (10));
+	add (_meter_box);
 
-	meter_box.set_border_width (PX_SCALE (10));
-	meter_box.set_spacing (PX_SCALE (10));
-	add (meter_box);
-
-	fast_screen_update_connection = Glib::signal_timeout().connect (sigc::mem_fun (*this, &LiveTraxMeters::update_meters), 40, GDK_PRIORITY_REDRAW + 10);
+	AudioEngine::instance ()->Running.connect (_engine_connections, invalidator (*this), boost::bind (&LiveTraxMeters::start_updating, this), gui_context ());
+	AudioEngine::instance ()->Stopped.connect (_engine_connections, invalidator (*this), boost::bind (&LiveTraxMeters::stop_updating, this), gui_context ());
+	AudioEngine::instance ()->Halted.connect (_engine_connections, invalidator (*this), boost::bind (&LiveTraxMeters::stop_updating, this), gui_context ());
+	
+	if (ARDOUR::AudioEngine::instance ()->running ()) {
+		start_updating ();
+	}
 }
 
 LiveTraxMeters::~LiveTraxMeters ()
 {
-	fast_screen_update_connection.disconnect ();
+}
+
+void
+LiveTraxMeters::start_updating ()
+{
+	resize (AudioEngine::instance ()->audio_input_ports ().size ());
+	_fast_screen_update_connection = Glib::signal_timeout().connect (sigc::mem_fun (*this, &LiveTraxMeters::update_meters), 40, GDK_PRIORITY_REDRAW + 10);
+}
+
+void
+LiveTraxMeters::stop_updating ()
+{
+	_fast_screen_update_connection.disconnect ();
+	resize (0);
 }
 
 void
 LiveTraxMeters::resize (size_t sz)
 {
-	size_t old = meters.size();
+	size_t old = _meters.size();
 
 	while (old > sz) {
 		/* Widgets are all managed so this should delete them as they
 		   are removed.
 		*/
-		meter_box.remove (*widgets[old - 1]);
-		meters.pop_back ();
+		_meter_box.remove (*_widgets[old - 1]);
+		_meters.pop_back ();
+		_widgets.pop_back ();
 		old--;
 	}
 
@@ -76,7 +95,7 @@ LiveTraxMeters::resize (size_t sz)
 
 	for (size_t i = old; i < sz; ++i) {
 
-		meters.push_back (manage (new FastMeter (10 /* (uint32_t)floor (UIConfiguration::instance ().get_meter_hold ()) */, 
+		_meters.push_back (manage (new FastMeter (10 /* (uint32_t)floor (UIConfiguration::instance ().get_meter_hold ()) */, 
 		                                          8, FastMeter::Vertical, PX_SCALE (64),
 		                                          c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7], c[8], c[9],
 		                                          b[0], b[1], b[2], b[3],
@@ -87,15 +106,18 @@ LiveTraxMeters::resize (size_t sz)
 		char buf[16];
 		snprintf (buf, sizeof (buf), "%zu", i+1);
 		Gtk::Label* l = manage (new Gtk::Label (buf));
-		vb->pack_start (*meters.back(), true, true);
+		vb->pack_start (*_meters.back(), true, true);
 		vb->pack_start (*l, false, false, PX_SCALE(3));
 
-		widgets.push_back (vb);
+		_widgets.push_back (vb);
 
-		meter_box.pack_start (*vb, false, false, 0);
+		_meter_box.pack_start (*vb, false, false, 0);
 	}
 
-	meter_box.show_all ();
+	_meter_box.show_all ();
+	if (get_parent ()) {
+		queue_resize ();
+	}
 }
 
 bool
@@ -106,10 +128,10 @@ LiveTraxMeters::update_meters ()
 	size_t n = 0;
 
 	for (auto const & p : aip) {
-		if (n >= meters.size()) {
+		if (n >= _meters.size()) {
 			break;
 		}
-		meters[n]->set (p.second.meter->level, p.second.meter->peak);
+		_meters[n]->set (p.second.meter->level, p.second.meter->peak);
 		++n;
 	}
 

gtk2_ardour/livetrax_meters.h

@@ -6,6 +6,8 @@
 #include <gtkmm/box.h>
 #include <gtkmm/scrolledwindow.h>
 
+#include "pbd/signals.h"
+
 namespace Gtk {
 	class Label;
 }
@@ -16,20 +18,21 @@ namespace ArdourWidgets {
 
 class LiveTraxMeters : public Gtk::ScrolledWindow
 {
-  public:
-	LiveTraxMeters (size_t initial_cnt);
+public:
+	LiveTraxMeters ();
 	~LiveTraxMeters ();
 
+private:
+	void start_updating ();
+	void stop_updating ();
+	bool update_meters ();
 	void resize (size_t);
 
-  private:
-	Gtk::HBox meter_box;
-	Gtk::HBox global_hbox;
-	std::vector<Gtk::Widget*> widgets;
-	std::vector<ArdourWidgets::FastMeter*> meters;
-	sigc::connection fast_screen_update_connection;
-
-	bool update_meters ();
+	Gtk::HBox                              _meter_box;
+	std::vector<Gtk::Widget*>              _widgets;
+	std::vector<ArdourWidgets::FastMeter*> _meters;
+	PBD::ScopedConnectionList              _engine_connections;
+	sigc::connection                       _fast_screen_update_connection;
 };
 
 #endif /* __ardour_gtk_livetrax_meters_h__ */

merge.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+set -e
+
+git checkout ardour
+git pull --rebase
+
+
+git checkout master
+git pull --rebase
+git merge ardour
+git push