From 8cbf100e6126c1550a6436970d777a652ac1182e Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Date: Thu, 8 Oct 2015 21:35:02 +0200
Subject: [PATCH] Hook up the channel click events.

---
 glwidget.cpp   |  5 +++++
 glwidget.h     |  4 ++++
 mainwindow.cpp | 15 +++++++++++++++
 mainwindow.h   |  1 +
 mixer.cpp      |  5 +++++
 mixer.h        |  1 +
 theme.cpp      | 12 ++++++++++++
 theme.h        |  1 +
 theme.lua      | 10 +++-------
 9 files changed, 47 insertions(+), 7 deletions(-)

diff --git a/glwidget.cpp b/glwidget.cpp
index 9725210..1e34a1c 100644
--- a/glwidget.cpp
+++ b/glwidget.cpp
@@ -72,3 +72,8 @@ void GLWidget::paintGL()
 	frame.chain->render_to_screen();
 	check_error();
 }
+
+void GLWidget::mousePressEvent(QMouseEvent *event)
+{
+	emit clicked();
+}
diff --git a/glwidget.h b/glwidget.h
index 045ba55..d397273 100644
--- a/glwidget.h
+++ b/glwidget.h
@@ -33,6 +33,10 @@ protected:
 	void initializeGL() override;
 	void resizeGL(int width, int height) override;
 	void paintGL() override;
+	void mousePressEvent(QMouseEvent *event) override;
+
+signals:
+	void clicked();
 
 private:
 	Mixer::Output output;
diff --git a/mainwindow.cpp b/mainwindow.cpp
index bac1f31..99b7974 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1,6 +1,7 @@
 #include "mainwindow.h"
 #include "window.h"
 #include <thread>
+#include <QSignalMapper>
 
 #include "context.h"
 #include "mixer.h"
@@ -22,9 +23,23 @@ MainWindow::MainWindow()
 	ui->preview1->set_output(Mixer::OUTPUT_INPUT0);
 	ui->preview2->set_output(Mixer::OUTPUT_INPUT1);
 	ui->preview3->set_output(Mixer::OUTPUT_INPUT2);
+
+	QSignalMapper *mapper = new QSignalMapper(this);
+	mapper->setMapping(ui->preview1, 0),
+	mapper->setMapping(ui->preview2, 1);
+	mapper->setMapping(ui->preview3, 2);
+	connect(ui->preview1, SIGNAL(clicked()), mapper, SLOT(map()));
+	connect(ui->preview2, SIGNAL(clicked()), mapper, SLOT(map()));
+	connect(ui->preview3, SIGNAL(clicked()), mapper, SLOT(map()));
+	connect(mapper, SIGNAL(mapped(int)), this, SLOT(channel_clicked(int)));
 }
 
 void MainWindow::cut()
 {
 	global_mixer->transition_clicked(0);  // FIXME: real value
 }
+
+void MainWindow::channel_clicked(int channel_number)
+{
+	global_mixer->channel_clicked(channel_number);
+}
diff --git a/mainwindow.h b/mainwindow.h
index 3f3d8b6..edea126 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -12,6 +12,7 @@ public:
 
 public slots:
 	void cut();
+	void channel_clicked(int id);
 };
 
 #endif
diff --git a/mixer.cpp b/mixer.cpp
index e861613..fd3cbae 100644
--- a/mixer.cpp
+++ b/mixer.cpp
@@ -415,6 +415,11 @@ void Mixer::transition_clicked(int transition_num)
 	theme->transition_clicked(transition_num, frame / 60.0);
 }
 
+void Mixer::channel_clicked(int preview_num)
+{
+	theme->channel_clicked(preview_num);
+}
+
 Mixer::OutputChannel::~OutputChannel()
 {
 	if (has_current_frame) {
diff --git a/mixer.h b/mixer.h
index 3411a50..c6366fd 100644
--- a/mixer.h
+++ b/mixer.h
@@ -33,6 +33,7 @@ public:
 	void quit();
 
 	void transition_clicked(int transition_num);
+	void channel_clicked(int preview_num);
 
 	enum Output {
 		OUTPUT_LIVE = 0,
diff --git a/theme.cpp b/theme.cpp
index d75ac86..5a42dff 100644
--- a/theme.cpp
+++ b/theme.cpp
@@ -414,3 +414,15 @@ void Theme::transition_clicked(int transition_num, float t)
 		exit(1);
 	}
 }
+
+void Theme::channel_clicked(int preview_num)
+{
+	unique_lock<mutex> lock(m);
+	lua_getglobal(L, "channel_clicked");
+	lua_pushnumber(L, preview_num);
+
+	if (lua_pcall(L, 1, 0, 0) != 0) {
+		fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
+		exit(1);
+	}
+}
diff --git a/theme.h b/theme.h
index 6701ece..f35c6d5 100644
--- a/theme.h
+++ b/theme.h
@@ -28,6 +28,7 @@ public:
 
 	void connect_signal(movit::YCbCrInput *input, int signal_num);
 	void transition_clicked(int transition_num, float t);
+	void channel_clicked(int preview_num);
 
 private:
 	std::mutex m;
diff --git a/theme.lua b/theme.lua
index 3a59040..7a5ff80 100644
--- a/theme.lua
+++ b/theme.lua
@@ -107,9 +107,8 @@ function transition_clicked(num, t)
 	zoom_dst = temp
 end
 
-function channel_clicked(num, t)
-	-- Presumably change the preview here.
-	io.write("STUB: channel_clicked\n")
+function channel_clicked(num)
+	preview_signal_num = num
 end
 
 -- Called every frame. Get the chain for displaying at input <num>,
@@ -154,10 +153,7 @@ function get_chain(num, t, width, height)
 		return main_chain_hq.chain, prepare
 	end
 	if num == 1 then  -- Preview.
-		prepare = function()
-			simple_chain_lq_input:connect_signal(preview_signal_num)
-		end
-		return simple_chain_lq, prepare
+		num = preview_signal_num + 2
 	end
 	if num == 2 then
 		prepare = function()
-- 
2.39.2