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Added parametric zoom on QChart....
Added parametric zoom on QChart. Signed-off-by: jeandet <alexis.jeandet@member.fsf.org>

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qpolarchart.h
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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Charts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.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-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QPOLARCHART_H
#define QPOLARCHART_H
#include <QtCharts/QChart>
QT_CHARTS_BEGIN_NAMESPACE
class QAbstractSeries;
class QAbstractAxis;
class QT_CHARTS_EXPORT QPolarChart : public QChart
{
Q_OBJECT
Q_ENUMS(PolarOrientation)
Q_FLAGS(PolarOrientations)
public:
enum PolarOrientation {
PolarOrientationRadial = 0x1,
PolarOrientationAngular = 0x2
};
Q_DECLARE_FLAGS(PolarOrientations, PolarOrientation)
public:
explicit QPolarChart(QGraphicsItem *parent = Q_NULLPTR, Qt::WindowFlags wFlags = Qt::WindowFlags());
~QPolarChart();
void addAxis(QAbstractAxis *axis, PolarOrientation polarOrientation);
QList<QAbstractAxis*> axes(PolarOrientations polarOrientation = PolarOrientations(PolarOrientationRadial | PolarOrientationAngular), QAbstractSeries *series = Q_NULLPTR) const;
static PolarOrientation axisPolarOrientation(QAbstractAxis *axis);
private:
Q_DISABLE_COPY(QPolarChart)
};
QT_CHARTS_END_NAMESPACE
#endif // QCHART_H