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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtCharts/qlogvalueaxis.h>
#include <QtCore/qmath.h>
#include <private/abstractchartlayout_p.h>
#include <private/chartpresenter_p.h>
#include <private/polarchartlogvalueaxisangular_p.h>
QT_BEGIN_NAMESPACE
PolarChartLogValueAxisAngular::PolarChartLogValueAxisAngular(QLogValueAxis *axis,
QGraphicsItem *item)
: PolarChartAxisAngular(axis, item)
{
QObject::connect(axis, SIGNAL(baseChanged(qreal)), this, SLOT(handleBaseChanged(qreal)));
QObject::connect(axis, SIGNAL(labelFormatChanged(QString)),
this, SLOT(handleLabelFormatChanged(QString)));
}
PolarChartLogValueAxisAngular::~PolarChartLogValueAxisAngular()
{
}
QList<qreal> PolarChartLogValueAxisAngular::calculateLayout() const
{
QLogValueAxis *logValueAxis = qobject_cast<QLogValueAxis *>(axis());
QList<qreal> points;
points.resize(logValueAxis->tickCount());
const qreal logMax = qLn(logValueAxis->max()) / qLn(logValueAxis->base());
const qreal logMin = qLn(logValueAxis->min()) / qLn(logValueAxis->base());
const qreal startEdge = qMin(logMin, logMax);
const qreal delta = 360.0 / qAbs(logMax - logMin);
const qreal initialSpan = (std::ceil(startEdge) - startEdge) * delta;
for (int i = 0; i < logValueAxis->tickCount(); ++i)
points[i] = initialSpan + (delta * qreal(i));
return points;
}
void PolarChartLogValueAxisAngular::createAxisLabels(const QList<qreal> &layout)
{
QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis());
setLabels(createLogValueLabels(logValueAxis->min(),
logValueAxis->max(),
logValueAxis->base(),
layout.size(),
logValueAxis->labelFormat()));
}
void PolarChartLogValueAxisAngular::handleBaseChanged(qreal base)
{
Q_UNUSED(base);
QGraphicsLayoutItem::updateGeometry();
if (presenter())
presenter()->layout()->invalidate();
}
void PolarChartLogValueAxisAngular::handleLabelFormatChanged(const QString &format)
{
Q_UNUSED(format);
QGraphicsLayoutItem::updateGeometry();
if (presenter())
presenter()->layout()->invalidate();
}
QT_END_NAMESPACE
#include "moc_polarchartlogvalueaxisangular_p.cpp"
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