From 5702637ee38f0349fd0b7f17f10bda581e795a9d Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Mon, 25 Feb 2013 00:28:03 +0000
Subject: [PATCH] Respond to gain in the audio dialog.

---
 src/wx/audio_dialog.cc | 13 +++++++++++++
 src/wx/audio_dialog.h  |  7 ++++++-
 src/wx/audio_plot.cc   | 12 ++++++++++--
 src/wx/audio_plot.h    |  3 +++
 4 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/src/wx/audio_dialog.cc b/src/wx/audio_dialog.cc
index 11efc153c..32864ca15 100644
--- a/src/wx/audio_dialog.cc
+++ b/src/wx/audio_dialog.cc
@@ -54,6 +54,9 @@ AudioDialog::AudioDialog (wxWindow* parent, boost::shared_ptr<Film> film)
 void
 AudioDialog::set_film (boost::shared_ptr<Film> f)
 {
+	_film_connection.disconnect ();
+	_film = f;
+	
 	shared_ptr<AudioAnalysis> a;
 
 	try {
@@ -70,6 +73,8 @@ AudioDialog::set_film (boost::shared_ptr<Film> f)
 	}
 
 	_channel->SetSelection (0);
+
+	_film_connection = f->Changed.connect (bind (&AudioDialog::film_changed, this, _1));
 }
 
 void
@@ -77,3 +82,11 @@ AudioDialog::channel_changed (wxCommandEvent &)
 {
 	_plot->set_channel (_channel->GetSelection ());
 }
+
+void
+AudioDialog::film_changed (Film::Property p)
+{
+	if (p == Film::AUDIO_GAIN) {
+		_plot->set_gain (_film->audio_gain ());
+	}
+}
diff --git a/src/wx/audio_dialog.h b/src/wx/audio_dialog.h
index 1e4563972..968fd0a12 100644
--- a/src/wx/audio_dialog.h
+++ b/src/wx/audio_dialog.h
@@ -18,7 +18,9 @@
 */
 
 #include <boost/shared_ptr.hpp>
+#include <boost/signals2.hpp>
 #include <wx/wx.h>
+#include "lib/film.h"
 
 class AudioPlot;
 class Film;
@@ -31,8 +33,11 @@ public:
 	void set_film (boost::shared_ptr<Film>);
 
 private:
+	void film_changed (Film::Property);
 	void channel_changed (wxCommandEvent &);
-	
+
+	boost::shared_ptr<Film> _film;
 	AudioPlot* _plot;
 	wxChoice* _channel;
+	boost::signals2::scoped_connection _film_connection;
 };
diff --git a/src/wx/audio_plot.cc b/src/wx/audio_plot.cc
index cc2d8f6b4..d438426c7 100644
--- a/src/wx/audio_plot.cc
+++ b/src/wx/audio_plot.cc
@@ -36,6 +36,7 @@ using boost::shared_ptr;
 AudioPlot::AudioPlot (wxWindow* parent)
 	: wxPanel (parent)
 	, _channel (0)
+	, _gain (0)
 {
 	Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (AudioPlot::paint), 0, this);
 
@@ -91,12 +92,12 @@ AudioPlot::paint (wxPaintEvent &)
 
 	for (int i = 0; i < AudioPoint::COUNT; ++i) {
 		path[i] = gc->CreatePath ();
-		path[i].MoveToPoint (0, height - (max (_analysis->get_point(_channel, 0)[i], -60.0f) + 60) * ys);
+		path[i].MoveToPoint (0, height - (max (_analysis->get_point(_channel, 0)[i], -60.0f) + 60 + _gain) * ys);
 	}
 
 	for (int i = 0; i < _analysis->points(_channel); ++i) {
 		for (int j = 0; j < AudioPoint::COUNT; ++j) {
-			path[j].AddLineToPoint (i * xs, height - (max (_analysis->get_point(_channel, i)[j], -60.0f) + 60) * ys);
+			path[j].AddLineToPoint (i * xs, height - (max (_analysis->get_point(_channel, i)[j], -60.0f) + 60 + _gain) * ys);
 		}
 	}
 
@@ -108,3 +109,10 @@ AudioPlot::paint (wxPaintEvent &)
 
 	delete gc;
 }
+
+void
+AudioPlot::set_gain (float g)
+{
+	_gain = g;
+	Refresh ();
+}
diff --git a/src/wx/audio_plot.h b/src/wx/audio_plot.h
index 03bd79323..dfc1b18ae 100644
--- a/src/wx/audio_plot.h
+++ b/src/wx/audio_plot.h
@@ -30,10 +30,13 @@ public:
 
 	void set_analysis (boost::shared_ptr<AudioAnalysis>);
 	void set_channel (int c);
+	void set_gain (float);
 
 private:
 	void paint (wxPaintEvent &);
 
 	boost::shared_ptr<AudioAnalysis> _analysis;
 	int _channel;
+	/** gain to apply in dB */
+	float _gain;
 };
-- 
2.30.2