src/gui/styles/qstylehelper_p.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 06 Jul 2010 15:10:48 +0300
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtCore/qglobal.h>
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#include <QtCore/qpoint.h>
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#include <QtCore/qstring.h>
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#include <QtGui/qpolygon.h>
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#include <QtCore/qstringbuilder.h>
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#ifndef QSTYLEHELPER_P_H
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#define QSTYLEHELPER_P_H
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//
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//  W A R N I N G
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//  -------------
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//
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// This file is not part of the Qt API.  It exists purely as an
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// implementation detail.  This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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QT_BEGIN_NAMESPACE
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class QPainter;
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class QPixmap;
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class QStyleOptionSlider;
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class QStyleOption;
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namespace QStyleHelper
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{
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    QString uniqueName(const QString &key, const QStyleOption *option, const QSize &size);
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    qreal dpiScaled(qreal value);
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#ifndef QT_NO_DIAL
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    qreal angle(const QPointF &p1, const QPointF &p2);
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    QPolygonF calcLines(const QStyleOptionSlider *dial);
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    int calcBigLineSize(int radius);
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    void drawDial(const QStyleOptionSlider *dial, QPainter *painter);
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#endif //QT_NO_DIAL
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    void drawBorderPixmap(const QPixmap &pixmap, QPainter *painter, const QRect &rect,
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                     int left = 0, int top = 0, int right = 0,
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                     int bottom = 0);
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}
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// internal helper. Converts an integer value to an unique string token
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template <typename T>
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        struct HexString
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{
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    inline HexString(const T t)
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        : val(t)
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    {}
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    inline void write(QChar *&dest) const
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    {
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        const ushort hexChars[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
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        const char *c = reinterpret_cast<const char *>(&val);
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        for (uint i = 0; i < sizeof(T); ++i) {
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            *dest++ = hexChars[*c & 0xf];
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            *dest++ = hexChars[(*c & 0xf0) >> 4];
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            ++c;
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        }
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    }
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    const T val;
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};
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// specialization to enable fast concatenating of our string tokens to a string
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template <typename T>
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        struct QConcatenable<HexString<T> >
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{
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    typedef HexString<T> type;
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    enum { ExactSize = true };
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    static int size(const HexString<T> &str) { return sizeof(str.val) * 2; }
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    static inline void appendTo(const HexString<T> &str, QChar *&out) { str.write(out); }
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};
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QT_END_NAMESPACE
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#endif // QSTYLEHELPER_P_H