Windows QPA: Detect Windows 10 tablet mode

Add new file for dynamically loading Window 10 Helpers via combase.dll
and add function qt_windowsIsTabletMode() querying
UIViewSettings::get_UserInteractionMode() for "Touch" mode.

The style hint QPlatformIntegration::ShowIsMaximized will then
reflect the tablet mode setting.

Task-number: QTBUG-56831
Change-Id: Ia361dd172fcf0e54fdfc70863c43527f3ea72fe2
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>

1 files changed, 52 insertions, 0 deletions

diff --git a/src/plugins/platforms/windows/qwin10helpers.h b/src/plugins/platforms/windows/qwin10helpers.h
new file mode 100644
index 0000000000..e1485003dd
--- /dev/null
+++ b/src/plugins/platforms/windows/qwin10helpers.h
@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWIN10HELPERS_H
+#define QWIN10HELPERS_H
+
+#include <QtCore/QtGlobal>
+#include <QtCore/qt_windows.h>
+
+QT_BEGIN_NAMESPACE
+
+bool qt_windowsIsTabletMode(HWND hwnd);
+
+QT_END_NAMESPACE
+
+#endif // QWIN10HELPERS_H