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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** 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.
**
****************************************************************************/
#ifndef QRANGEMODEL_P_H
#define QRANGEMODEL_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt Components 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.
//
#include "qrangemodel.h"
class QRangeModelPrivate
{
Q_DECLARE_PUBLIC(QRangeModel)
public:
QRangeModelPrivate(QRangeModel *qq);
virtual ~QRangeModelPrivate();
void init();
qreal posatmin, posatmax;
qreal minimum, maximum, stepSize, pos, value;
uint inverted : 1;
QRangeModel *q_ptr;
inline qreal effectivePosAtMin() const {
return inverted ? posatmax : posatmin;
}
inline qreal effectivePosAtMax() const {
return inverted ? posatmin : posatmax;
}
inline qreal equivalentPosition(qreal value) const {
// Return absolute position from absolute value
const qreal valueRange = maximum - minimum;
if (valueRange == 0)
return effectivePosAtMin();
const qreal scale = (effectivePosAtMax() - effectivePosAtMin()) / valueRange;
return (value - minimum) * scale + effectivePosAtMin();
}
inline qreal equivalentValue(qreal pos) const {
// Return absolute value from absolute position
const qreal posRange = effectivePosAtMax() - effectivePosAtMin();
if (posRange == 0)
return minimum;
const qreal scale = (maximum - minimum) / posRange;
return (pos - effectivePosAtMin()) * scale + minimum;
}
qreal publicPosition(qreal position) const;
qreal publicValue(qreal value) const;
void emitValueAndPositionIfChanged(const qreal oldValue, const qreal oldPosition);
};
#endif // QRANGEMODEL_P_H
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