From 7d8093df55f0bf76465add4ceb3732286971d849 Mon Sep 17 00:00:00 2001
From: Friedemann Kleint <Friedemann.Kleint@qt.io>
Date: Tue, 21 Apr 2020 12:29:34 +0200
Subject: [PATCH] Windows QPA: Fix High DPI scaling not becoming active when
 changing scaling
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When changing scaling from 100%, at which High DPI scaling is inactive,
to something larger,  High DPI scaling does not become active.

Update the factors when screens are refreshed.

Pick-to: 5.15
Task-number: QTBUG-77302
Task-number: QTBUG-77136
Task-number: QTBUG-82267
Change-Id: Iebbc29ced2f23af9db4d67839458848245e2db1d
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
---
 src/plugins/platforms/windows/qwindowsscreen.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/plugins/platforms/windows/qwindowsscreen.cpp b/src/plugins/platforms/windows/qwindowsscreen.cpp
index 9a4f8d152c..8850d8cdd4 100644
--- a/src/plugins/platforms/windows/qwindowsscreen.cpp
+++ b/src/plugins/platforms/windows/qwindowsscreen.cpp
@@ -567,6 +567,7 @@ bool QWindowsScreenManager::handleScreenChanges()
     }     // not lock screen
     if (primaryScreenChanged)
         QWindowsTheme::instance()->refreshFonts();
+    QHighDpiScaling::updateHighDpiScaling();
     return true;
 }