From ddcd3369219fbbc5576567a4eeae57abe9f0fa6d Mon Sep 17 00:00:00 2001
From: root <root@localhost.localdomain>
Date: Mon, 4 Jul 2022 20:58:47 +0800
Subject: [PATCH] QTBUG-86253-Mouse-source-point-error-caused-by-multi-touch

---
 src/gui/kernel/qguiapplication.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index bf17c871..5fbf1541 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -3054,7 +3054,7 @@ void QGuiApplicationPrivate::processTouchEvent(QWindowSystemInterfacePrivate::To
                 QEvent::Type mouseEventType = QEvent::MouseMove;
                 Qt::MouseButton button = Qt::NoButton;
                 Qt::MouseButtons buttons = Qt::LeftButton;
-                if (eventType == QEvent::TouchBegin && m_fakeMouseSourcePointId < 0)
+                if (eventType == QEvent::TouchBegin && m_fakeMouseSourcePointId < 0 || touchPoints.count() == 1)
                     m_fakeMouseSourcePointId = touchPoints.first().id();
                 for (const auto &touchPoint : touchPoints) {
                     if (touchPoint.id() == m_fakeMouseSourcePointId) {
-- 
2.31.1