/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtDataVisualization module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
**
****************************************************************************/

//
//  W A R N I N G
//  -------------
//
// This file is not part of the QtDataVisualization 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.

#ifndef UTILS_P_H
#define UTILS_P_H

#include "datavisualizationglobal_p.h"

class QLinearGradient;

QT_BEGIN_NAMESPACE_DATAVISUALIZATION

class Utils
{
public:
    enum ParamType {
        ParamTypeUnknown = 0,
        ParamTypeInt,
        ParamTypeUInt,
        ParamTypeReal
    };

    static GLuint getNearestPowerOfTwo(GLuint value);
    static QVector4D vectorFromColor(const QColor &color);
    static QColor colorFromVector(const QVector3D &colorVector);
    static QColor colorFromVector(const QVector4D &colorVector);
    static QImage printTextToImage(const QFont &font,
                                   const QString &text,
                                   const QColor &bgrColor,
                                   const QColor &txtColor,
                                   bool labelBackground,
                                   bool borders = false,
                                   int maxLabelWidth = 0);
    static QVector4D getSelection(QPoint mousepos, int height);
    static QImage getGradientImage(QLinearGradient &gradient);

    static ParamType preParseFormat(const QString &format, QString &preStr, QString &postStr,
                                    int &precision, char &formatSpec);
    static QString formatLabelSprintf(const QByteArray &format, ParamType paramType, qreal value);
    static QString formatLabelLocalized(ParamType paramType, qreal value,
                               const QLocale &locale, const QString &preStr, const QString &postStr,
                               int precision, char formatSpec, const QByteArray &format);
    static QString defaultLabelFormat();

    static float wrapValue(float value, float min, float max);
    static QQuaternion calculateRotation(const QVector3D &xyzRotations);
    static bool isOpenGLES();

private:
    static ParamType mapFormatCharToParamType(char formatSpec);
};

QT_END_NAMESPACE_DATAVISUALIZATION

#endif