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Diffstat (limited to 'src/plugins/platforms/windows/qwindowsscaling.h')
-rw-r--r-- | src/plugins/platforms/windows/qwindowsscaling.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/plugins/platforms/windows/qwindowsscaling.h b/src/plugins/platforms/windows/qwindowsscaling.h new file mode 100644 index 0000000000..99fec7c810 --- /dev/null +++ b/src/plugins/platforms/windows/qwindowsscaling.h @@ -0,0 +1,114 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QWINDOWSSCALING_H +#define QWINDOWSSCALING_H + +#include <QtGui/QRegion> +#include <QtCore/QVector> +#include <QtCore/QRect> + +QT_BEGIN_NAMESPACE + +enum +#if defined(Q_COMPILER_CLASS_ENUM) || defined(Q_CC_MSVC) + : int +#endif +{ QWINDOWSIZE_MAX = 16777215 }; + +class QWindowsScaling { +public: + static bool isActive() { return m_factor > 1; } + static int factor() { return m_factor; } + static void setFactor(int factor) { m_factor = factor; } + static int determineUiScaleFactor(); + + // Scaling helpers for size constraints. + static int mapToNativeConstrained(int qt) + { return m_factor != 1 && qt > 0 && qt < QWINDOWSIZE_MAX ? qt * m_factor : qt; } + + static int mapFromNativeConstrained(int dp) + { return m_factor != 1 && dp > 0 && dp < QWINDOWSIZE_MAX ? dp / m_factor : dp; } + + static QSize mapToNativeConstrained(const QSize &qt) + { return QSize(mapToNativeConstrained(qt.width()), mapToNativeConstrained(qt.height())); } + + static QRect mapToNative(const QRect &qRect) + { + return QRect(qRect.x() * m_factor, qRect.y() * m_factor, qRect.width() * m_factor, qRect.height() * m_factor); + } + + static QRect mapFromNative(const QRect &dp) + { + return isActive() ? + QRect(dp.x() / m_factor, dp.y() / m_factor, (dp.width() + 1) / m_factor, (dp.height() + 1) / m_factor) : + dp; + } + + static QRegion mapToNative(const QRegion ®ionQt) + { + if (!QWindowsScaling::isActive() || regionQt.isEmpty()) + return regionQt; + + QRegion result; + foreach (const QRect &rectQt, regionQt.rects()) + result += QWindowsScaling::mapToNative(rectQt); + return result; + } + + static QRegion mapFromNative(const QRegion ®ionDp) + { + if (!QWindowsScaling::isActive() || regionDp.isEmpty()) + return regionDp; + + QRegion result; + foreach (const QRect &rectDp, regionDp.rects()) + result += QWindowsScaling::mapFromNative(rectDp); + return result; + } + +private: + static int m_factor; +}; + +QT_END_NAMESPACE + +#endif // QWINDOWSSCALING_H |