From 0303f18ac6102e8b22ad58b69bd75ccd1c4e0644 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Tue, 15 Aug 2017 18:16:46 +0300
Subject: [PATCH] Fix check for _mouseSelection flag in dialogs.

Fixes #3781.
---
 Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp | 8 +++++---
 Telegram/SourceFiles/dialogs/dialogs_inner_widget.h   | 1 +
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp b/Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp
index 722e04cb0..723d8fb15 100644
--- a/Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp
+++ b/Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp
@@ -472,9 +472,11 @@ void DialogsInner::activate() {
 }
 
 void DialogsInner::mouseMoveEvent(QMouseEvent *e) {
-	auto position = e->pos();
-	_mouseSelection = true;
-	updateSelected(position);
+	if (_mouseLastGlobalPosition != e->globalPos()) {
+		_mouseLastGlobalPosition = e->globalPos();
+		_mouseSelection = true;
+	}
+	updateSelected(e->pos());
 }
 
 void DialogsInner::clearIrrelevantState() {
diff --git a/Telegram/SourceFiles/dialogs/dialogs_inner_widget.h b/Telegram/SourceFiles/dialogs/dialogs_inner_widget.h
index 7e679edd2..3b4531d41 100644
--- a/Telegram/SourceFiles/dialogs/dialogs_inner_widget.h
+++ b/Telegram/SourceFiles/dialogs/dialogs_inner_widget.h
@@ -223,6 +223,7 @@ private:
 	DialogsList _contacts;
 
 	bool _mouseSelection = false;
+	QPoint _mouseLastGlobalPosition;
 	Qt::MouseButton _pressButton = Qt::LeftButton;
 
 	std::unique_ptr<ImportantSwitch> _importantSwitch;