From 9555ca8b3fdddd62496ebaaada2d9c0f980df03e Mon Sep 17 00:00:00 2001
From: Soeren Apel <soeren@apelpie.net>
Date: Wed, 12 Nov 2014 18:16:47 +0100
Subject: [PATCH] Trace: Introduce hover_point_changed()

---
 pv/view/decodetrace.cpp |  4 ++++
 pv/view/decodetrace.h   |  2 ++
 pv/view/trace.cpp       | 18 ++++++++++++++++++
 pv/view/trace.h         |  4 ++++
 4 files changed, 28 insertions(+)

diff --git a/pv/view/decodetrace.cpp b/pv/view/decodetrace.cpp
index f450f45b..b0e08f6f 100644
--- a/pv/view/decodetrace.cpp
+++ b/pv/view/decodetrace.cpp
@@ -546,6 +546,10 @@ pair<uint64_t, uint64_t> DecodeTrace::get_sample_range(int x_start, int x_end) c
 	return make_pair(start, end);
 }
 
+void DecodeTrace::hover_point_changed()
+{
+}
+
 void DecodeTrace::create_decoder_form(int index,
 	shared_ptr<data::decode::Decoder> &dec, QWidget *parent,
 	QFormLayout *form)
diff --git a/pv/view/decodetrace.h b/pv/view/decodetrace.h
index f71894d0..e172cf8f 100644
--- a/pv/view/decodetrace.h
+++ b/pv/view/decodetrace.h
@@ -153,6 +153,8 @@ private:
 	 */
 	std::pair<uint64_t, uint64_t> get_sample_range(int x_start, int x_end) const;
 
+	void hover_point_changed();
+
 	void create_decoder_form(int index,
 		std::shared_ptr<pv::data::decode::Decoder> &dec,
 		QWidget *parent, QFormLayout *form);
diff --git a/pv/view/trace.cpp b/pv/view/trace.cpp
index f23de2ff..61a002bb 100644
--- a/pv/view/trace.cpp
+++ b/pv/view/trace.cpp
@@ -42,6 +42,7 @@ const QPen Trace::AxisPen(QColor(128, 128, 128, 64));
 const int Trace::LabelHitPadding = 2;
 
 Trace::Trace(QString name) :
+	_view(NULL),
 	_name(name),
 	_v_offset(0),
 	_popup(NULL),
@@ -82,7 +83,15 @@ void Trace::set_v_offset(int v_offset)
 void Trace::set_view(pv::view::View *view)
 {
 	assert(view);
+
+	if (_view)
+		disconnect(_view, SIGNAL(hover_point_changed()),
+			this, SLOT(on_hover_point_changed()));
+
 	_view = view;
+
+	connect(view, SIGNAL(hover_point_changed()),
+		this, SLOT(on_hover_point_changed()));
 }
 
 void Trace::paint_back(QPainter &p, int left, int right)
@@ -271,6 +280,10 @@ void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 	add_colour_option(parent, form);
 }
 
+void Trace::hover_point_changed()
+{
+}
+
 void Trace::on_popup_closed()
 {
 	_popup = NULL;
@@ -289,5 +302,10 @@ void Trace::on_colour_changed(const QColor &colour)
 	colour_changed();
 }
 
+void Trace::on_hover_point_changed()
+{
+	hover_point_changed();
+}
+
 } // namespace view
 } // namespace pv
diff --git a/pv/view/trace.h b/pv/view/trace.h
index 4866b558..5f54ea1d 100644
--- a/pv/view/trace.h
+++ b/pv/view/trace.h
@@ -172,6 +172,8 @@ protected:
 
 	virtual void populate_popup_form(QWidget *parent, QFormLayout *form);
 
+	virtual void hover_point_changed();
+
 private Q_SLOTS:
 	void on_text_changed(const QString &text);
 
@@ -179,6 +181,8 @@ private Q_SLOTS:
 
 	void on_popup_closed();
 
+	void on_hover_point_changed();
+
 Q_SIGNALS:
 	void visibility_changed();
 	void text_changed();	
-- 
2.30.2