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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick Controls 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQUICKRANGEMODEL_P_P_H
#define QQUICKRANGEMODEL_P_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 "qquickrangemodel_p.h"
QT_BEGIN_NAMESPACE
class QQuickRangeModel1Private
{
Q_DECLARE_PUBLIC(QQuickRangeModel1)
public:
QQuickRangeModel1Private(QQuickRangeModel1 *qq);
virtual ~QQuickRangeModel1Private();
void init();
qreal posatmin, posatmax;
qreal minimum, maximum, stepSize, pos, value;
uint inverted : 1;
QQuickRangeModel1 *q_ptr;
bool isComplete;
bool positionChanged;
bool valueChanged;
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;
// Avoid perverse rounding glitches when at an end:
const qreal mid = (effectivePosAtMax() + effectivePosAtMin()) * 0.5;
if (pos < mid)
return (pos - effectivePosAtMin()) * scale + minimum;
return maximum - scale * (effectivePosAtMax() - pos);
}
qreal publicPosition(qreal position) const;
qreal publicValue(qreal value) const;
void emitValueAndPositionIfChanged(const qreal oldValue, const qreal oldPosition);
};
QT_END_NAMESPACE
#endif // QQUICKRANGEMODEL_P_P_H
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