From 3a34ef636af43e249fba417419db14c42b98094a Mon Sep 17 00:00:00 2001
From: Friedemann Kleint <Friedemann.Kleint@qt.io>
Date: Thu, 21 Mar 2019 09:11:27 +0100
Subject: QMenu/QComboBox: Extract helper for determining the pop up geometry
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Move the code returning whether a popup should use the full
screen to QStylePrivate and use for QMenu and QComboBox.

Task-number: QTBUG-73231
Change-Id: I1901ecedfa90edf16329ce3b13ef4abea5ab44e8
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
---
 src/widgets/styles/qstyle.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/widgets/styles/qstyle.cpp')

diff --git a/src/widgets/styles/qstyle.cpp b/src/widgets/styles/qstyle.cpp
index 97ec1d3f19..ec5b6df6b3 100644
--- a/src/widgets/styles/qstyle.cpp
+++ b/src/widgets/styles/qstyle.cpp
@@ -46,6 +46,7 @@
 #include "qstyleoption.h"
 #include "private/qstyle_p.h"
 #include "private/qguiapplication_p.h"
+#include <qpa/qplatformtheme.h>
 #ifndef QT_NO_DEBUG
 #include "qdebug.h"
 #endif
@@ -2447,6 +2448,13 @@ void QStyle::setProxy(QStyle *style)
     d->proxyStyle = style;
 }
 
+//Windows and KDE allow menus to cover the taskbar, while GNOME and macOS don't
+bool QStylePrivate::useFullScreenForPopup()
+{
+    auto theme = QGuiApplicationPrivate::platformTheme();
+    return theme && theme->themeHint(QPlatformTheme::UseFullScreenForPopupMenu).toBool();
+}
+
 QT_END_NAMESPACE
 
 #include "moc_qstyle.cpp"
-- 
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