From 6ad13d8a4b8a56dbd4c81a1260f00f9f0d367984 Mon Sep 17 00:00:00 2001
From: Craig Watson <craig@watsons.ch>
Date: Wed, 20 Apr 2016 14:43:34 +0200
Subject: [PATCH] Fix scroll speed with hand tool when zoomed in/out

---
 src/board/UBBoardController.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/board/UBBoardController.cpp b/src/board/UBBoardController.cpp
index 31b732c2..b04e5303 100644
--- a/src/board/UBBoardController.cpp
+++ b/src/board/UBBoardController.cpp
@@ -920,7 +920,8 @@ void UBBoardController::zoom(const qreal ratio, QPointF scenePoint)
 
 void UBBoardController::handScroll(qreal dx, qreal dy)
 {
-    mControlView->translate(dx, dy);
+    qreal antiScaleRatio = 1/(mSystemScaleFactor * currentZoom());
+    mControlView->translate(dx*antiScaleRatio, dy*antiScaleRatio);
 
     UBApplication::applicationController->adjustDisplayView();