From 7b7016c4b3c9feeb379d44ec10d9abdbf570b6d2 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Fri, 1 Apr 2022 16:24:19 +0400
Subject: [PATCH] Fix scrolling with a touchpad in vertical drum.

---
 Telegram/SourceFiles/ui/widgets/vertical_drum_picker.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Telegram/SourceFiles/ui/widgets/vertical_drum_picker.cpp b/Telegram/SourceFiles/ui/widgets/vertical_drum_picker.cpp
index f8bee072fb..e6074b8fc1 100644
--- a/Telegram/SourceFiles/ui/widgets/vertical_drum_picker.cpp
+++ b/Telegram/SourceFiles/ui/widgets/vertical_drum_picker.cpp
@@ -106,8 +106,10 @@ void VerticalDrumPicker::handleWheelEvent(not_null<QWheelEvent*> e) {
 	if (direction) {
 		_animation.jumpToOffset(direction);
 	} else {
-		increaseShift(
-			std::min(e->pixelDelta().y() / float64(_itemHeight), 0.99));
+		const auto delta = e->pixelDelta().y()
+			? e->pixelDelta().y()
+			: e->angleDelta().y();
+		increaseShift(std::min(delta / float64(_itemHeight), 0.99));
 		if (e->phase() == Qt::ScrollEnd) {
 			animationDataFromIndex();
 			_animation.jumpToOffset(0);