From 2f3accf3cbd15ef95060a2726d8977b84b201852 Mon Sep 17 00:00:00 2001
From: fourst4r <oxygenmagnet@hotmail.com>
Date: Sun, 27 Sep 2020 01:47:20 +1200
Subject: [PATCH] fix a crash using middle click scroll on chat window (#1870)

* fix middle click scroll crash

* Update CHANGELOG.md

* get the float dpi, not int
---
 CHANGELOG.md                       | 1 +
 src/widgets/helper/ChannelView.cpp | 3 +--
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ebaf1aa..dc19e978 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,7 @@
 - Bugfix: MacOS updater looked for non-existing fields, causing it to always fail the update check (#1642)
 - Bugfix: Fixed message menu crashing if the message you right-clicked goes out of scope before you select an action (#1783) (#1787)
 - Bugfix: Fixed alternate messages flickering in UserInfoPopup when clicking Refresh if there was an odd number of messages in there (#1789 #1810)
+- Bugfix: Fix a crash when using middle click scroll on a chat window. (#1870)
 - Settings open faster
 - Dev: Fully remove Twitch Chatroom support
 - Dev: Handle conversion of historical CLEARCHAT messages to NOTICE messages in Chatterino instead of relying on the Recent Messages API to handle it for us. (#1804)
diff --git a/src/widgets/helper/ChannelView.cpp b/src/widgets/helper/ChannelView.cpp
index f9dca666..6d4f5048 100644
--- a/src/widgets/helper/ChannelView.cpp
+++ b/src/widgets/helper/ChannelView.cpp
@@ -1969,8 +1969,7 @@ void ChannelView::disableScrolling()
 
 void ChannelView::scrollUpdateRequested()
 {
-    const qreal dpi =
-        QGuiApplication::screenAt(this->pos())->devicePixelRatio();
+    const qreal dpi = this->devicePixelRatioF();
     const qreal delta = dpi * (this->currentMousePosition_.y() -
                                this->lastMiddlePressPosition_.y());
     const int cursorHeight = this->cursors_.neutral.pixmap().height();