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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd
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** All rights reserved.
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** For any questions to The Qt Company, please use contact form at http://qt.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and The Qt Company.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.io
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**
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****************************************************************************/
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#include <private/polarchartlogvalueaxisradial_p.h>
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#include <private/abstractchartlayout_p.h>
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#include <private/chartpresenter_p.h>
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#include <QtCharts/QLogValueAxis>
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#include <QtCore/QtMath>
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#include <QtCore/QDebug>
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#include <cmath>
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QT_CHARTS_BEGIN_NAMESPACE
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PolarChartLogValueAxisRadial::PolarChartLogValueAxisRadial(QLogValueAxis *axis, QGraphicsItem *item)
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: PolarChartAxisRadial(axis, item)
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{
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QObject::connect(axis, SIGNAL(baseChanged(qreal)), this, SLOT(handleBaseChanged(qreal)));
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QObject::connect(axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString)));
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}
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PolarChartLogValueAxisRadial::~PolarChartLogValueAxisRadial()
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{
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}
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QVector<qreal> PolarChartLogValueAxisRadial::calculateLayout() const
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{
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QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis());
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const qreal logMax = std::log10(logValueAxis->max()) / std::log10(logValueAxis->base());
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const qreal logMin = std::log10(logValueAxis->min()) / std::log10(logValueAxis->base());
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const qreal innerEdge = logMin < logMax ? logMin : logMax;
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const qreal outerEdge = logMin > logMax ? logMin : logMax;
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const qreal delta = (axisGeometry().width() / 2.0) / qAbs(logMax - logMin);
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const qreal initialSpan = (qCeil(innerEdge) - innerEdge) * delta;
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int tickCount = qAbs(qCeil(logMax) - qCeil(logMin));
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// Extra tick if outer edge is exactly at the tick
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if (outerEdge == qCeil(outerEdge))
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tickCount++;
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QVector<qreal> points;
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points.resize(tickCount);
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for (int i = 0; i < tickCount; ++i) {
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qreal radialCoordinate = initialSpan + (delta * qreal(i));
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points[i] = radialCoordinate;
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}
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return points;
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}
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void PolarChartLogValueAxisRadial::createAxisLabels(const QVector<qreal> &layout)
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{
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QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis());
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setLabels(createLogValueLabels(logValueAxis->min(),
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logValueAxis->max(),
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logValueAxis->base(),
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layout.size(),
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logValueAxis->labelFormat()));
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}
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void PolarChartLogValueAxisRadial::handleBaseChanged(qreal base)
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{
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Q_UNUSED(base);
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QGraphicsLayoutItem::updateGeometry();
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if (presenter())
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presenter()->layout()->invalidate();
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}
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void PolarChartLogValueAxisRadial::handleLabelFormatChanged(const QString &format)
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{
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Q_UNUSED(format);
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QGraphicsLayoutItem::updateGeometry();
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if (presenter())
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presenter()->layout()->invalidate();
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}
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#include "moc_polarchartlogvalueaxisradial_p.cpp"
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QT_CHARTS_END_NAMESPACE
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