From 1d058ec709ea14601934870f2178065bb3faa598 Mon Sep 17 00:00:00 2001
From: itsmattkc <34096995+itsmattkc@users.noreply.github.com>
Date: Wed, 22 Feb 2023 09:52:56 -0800
Subject: [PATCH] handmovableview: normalize zoom scroll if scrolling is
 inverted

---
 app/widget/handmovableview/handmovableview.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/app/widget/handmovableview/handmovableview.cpp b/app/widget/handmovableview/handmovableview.cpp
index 83052dea3..4a916a0da 100644
--- a/app/widget/handmovableview/handmovableview.cpp
+++ b/app/widget/handmovableview/handmovableview.cpp
@@ -157,7 +157,11 @@ bool HandMovableView::WheelEventIsAZoomEvent(QWheelEvent *event)
 
 qreal HandMovableView::GetScrollZoomMultiplier(QWheelEvent *event)
 {
-  return 1.0 + (static_cast<qreal>(event->angleDelta().x() + event->angleDelta().y()) * 0.001);
+  qreal v = (static_cast<qreal>(event->angleDelta().x() + event->angleDelta().y()) * 0.001);
+  if (event->inverted()) {
+    v = -v;
+  }
+  return 1.0 + v;
 }
 
 void HandMovableView::wheelEvent(QWheelEvent *event)