From 838d0522bf01d4e7550f8c124135debd452f0cac Mon Sep 17 00:00:00 2001
From: Soeren Apel <soeren@apelpie.net>
Date: Mon, 28 Dec 2015 21:48:30 +0100
Subject: [PATCH] Viewport: Allow for vertical dragging as well

---
 pv/view/viewport.cpp | 3 +++
 pv/view/viewport.hpp | 1 +
 2 files changed, 4 insertions(+)

diff --git a/pv/view/viewport.cpp b/pv/view/viewport.cpp
index 5cb6507..9e13666 100644
--- a/pv/view/viewport.cpp
+++ b/pv/view/viewport.cpp
@@ -78,6 +78,7 @@ void Viewport::item_hover(const shared_ptr<ViewItem> &item)
 void Viewport::drag()
 {
 	drag_offset_ = view_.offset();
+	drag_v_offset_ = view_.owner_visual_v_offset();
 }
 
 void Viewport::drag_by(const QPoint &delta)
@@ -87,6 +88,8 @@ void Viewport::drag_by(const QPoint &delta)
 
 	view_.set_scale_offset(view_.scale(),
 		(*drag_offset_ - delta.x() * view_.scale()));
+
+	view_.set_v_offset(-drag_v_offset_ - delta.y());
 }
 
 void Viewport::drag_release()
diff --git a/pv/view/viewport.hpp b/pv/view/viewport.hpp
index c2c42d1..704e731 100644
--- a/pv/view/viewport.hpp
+++ b/pv/view/viewport.hpp
@@ -97,6 +97,7 @@ private:
 
 private:
 	boost::optional<pv::util::Timestamp> drag_offset_;
+	int drag_v_offset_;
 
 	double pinch_offset0_;
 	double pinch_offset1_;
-- 
2.30.2