/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module 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.
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** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtCore/qglobal.h>
#include <QtCore/qpoint.h>
#include <QtCore/qstring.h>
#include <QtGui/qpolygon.h>
#include <QtCore/qstringbuilder.h>

#ifndef QSTYLEHELPER_P_H
#define QSTYLEHELPER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

QT_BEGIN_NAMESPACE

class QPainter;
class QPixmap;
class QStyleOptionSlider;
class QStyleOption;

namespace QStyleHelper
{
    QString uniqueName(const QString &key, const QStyleOption *option, const QSize &size);
    qreal dpiScaled(qreal value);
#ifndef QT_NO_DIAL
    qreal angle(const QPointF &p1, const QPointF &p2);
    QPolygonF calcLines(const QStyleOptionSlider *dial);
    int calcBigLineSize(int radius);
    void drawDial(const QStyleOptionSlider *dial, QPainter *painter);
#endif //QT_NO_DIAL
    void drawBorderPixmap(const QPixmap &pixmap, QPainter *painter, const QRect &rect,
                     int left = 0, int top = 0, int right = 0,
                     int bottom = 0);
}

// internal helper. Converts an integer value to an unique string token
template <typename T>
        struct HexString
{
    inline HexString(const T t)
        : val(t)
    {}

    inline void write(QChar *&dest) const
    {
        const ushort hexChars[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
        const char *c = reinterpret_cast<const char *>(&val);
        for (uint i = 0; i < sizeof(T); ++i) {
            *dest++ = hexChars[*c & 0xf];
            *dest++ = hexChars[(*c & 0xf0) >> 4];
            ++c;
        }
    }
    const T val;
};

// specialization to enable fast concatenating of our string tokens to a string
template <typename T>
        struct QConcatenable<HexString<T> >
{
    typedef HexString<T> type;
    enum { ExactSize = true };
    static int size(const HexString<T> &) { return sizeof(T) * 2; }
    static inline void appendTo(const HexString<T> &str, QChar *&out) { str.write(out); }
    typedef QString ConvertTo;
};

QT_END_NAMESPACE

#endif // QSTYLEHELPER_P_H
