polardomain.cpp
89 lines
| 2.5 KiB
| text/x-c
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CppLexer
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r2483 | /**************************************************************************** | ||
| ** | ||||
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r2776 | ** Copyright (C) 2015 The Qt Company Ltd | ||
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r2483 | ** All rights reserved. | ||
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r2776 | ** For any questions to The Qt Company, please use contact form at http://qt.io | ||
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r2483 | ** | ||
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r2740 | ** This file is part of the Qt Charts module. | ||
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r2483 | ** | ||
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r2740 | ** Licensees holding valid commercial license for Qt may use this file in | ||
| ** accordance with the Qt License Agreement provided with the Software | ||||
| ** or, alternatively, in accordance with the terms contained in a written | ||||
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r2776 | ** agreement between you and The Qt Company. | ||
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r2483 | ** | ||
| ** If you have questions regarding the use of this file, please use | ||||
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r2740 | ** contact form at http://qt.io | ||
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r2483 | ** | ||
| ****************************************************************************/ | ||||
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r2714 | #include <private/polardomain_p.h> | ||
| #include <private/qabstractaxis_p.h> | ||||
| #include <QtCore/QtMath> | ||||
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r2483 | |||
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r2712 | QT_CHARTS_BEGIN_NAMESPACE | ||
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r2483 | |||
| PolarDomain::PolarDomain(QObject *parent) | ||||
| : AbstractDomain(parent) | ||||
| { | ||||
| } | ||||
| PolarDomain::~PolarDomain() | ||||
| { | ||||
| } | ||||
| void PolarDomain::setSize(const QSizeF &size) | ||||
| { | ||||
| Q_ASSERT(size.width() == size.height()); | ||||
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r2580 | m_radius = size.height() / 2.0; | ||
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r2483 | m_center = QPointF(m_radius, m_radius); | ||
| AbstractDomain::setSize(size); | ||||
| } | ||||
| QPointF PolarDomain::calculateGeometryPoint(const QPointF &point, bool &ok) const | ||||
| { | ||||
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r2580 | qreal r = 0.0; | ||
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r2483 | qreal a = toAngularCoordinate(point.x(), ok); | ||
| if (ok) | ||||
| r = toRadialCoordinate(point.y(), ok); | ||||
| if (ok) { | ||||
| return m_center + polarCoordinateToPoint(a, r); | ||||
| } else { | ||||
| qWarning() << "Logarithm of negative value is undefined. Empty layout returned."; | ||||
| return QPointF(); | ||||
| } | ||||
| } | ||||
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r2820 | QVector<QPointF> PolarDomain::calculateGeometryPoints(const QVector<QPointF> &vector) const | ||
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r2483 | { | ||
| QVector<QPointF> result; | ||||
| result.resize(vector.count()); | ||||
| bool ok; | ||||
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r2580 | qreal r = 0.0; | ||
| qreal a = 0.0; | ||||
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r2483 | |||
| for (int i = 0; i < vector.count(); ++i) { | ||||
| a = toAngularCoordinate(vector[i].x(), ok); | ||||
| if (ok) | ||||
| r = toRadialCoordinate(vector[i].y(), ok); | ||||
| if (ok) { | ||||
| result[i] = m_center + polarCoordinateToPoint(a, r); | ||||
| } else { | ||||
| qWarning() << "Logarithm of negative value is undefined. Empty layout returned."; | ||||
| return QVector<QPointF>(); | ||||
| } | ||||
| } | ||||
| return result; | ||||
| } | ||||
| QPointF PolarDomain::polarCoordinateToPoint(qreal angularCoordinate, qreal radialCoordinate) const | ||||
| { | ||||
| qreal dx = qSin(angularCoordinate * (M_PI / 180)) * radialCoordinate; | ||||
| qreal dy = qCos(angularCoordinate * (M_PI / 180)) * radialCoordinate; | ||||
| return QPointF(dx, -dy); | ||||
| } | ||||
| #include "moc_polardomain_p.cpp" | ||||
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r2712 | QT_CHARTS_END_NAMESPACE | ||