polarchartlogvalueaxisradial.cpp
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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/polarchartlogvalueaxisradial_p.h> | ||
#include <private/abstractchartlayout_p.h> | ||||
#include <private/chartpresenter_p.h> | ||||
#include <QtCharts/QLogValueAxis> | ||||
#include <QtCore/QtMath> | ||||
#include <QtCore/QDebug> | ||||
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r2775 | #include <cmath> | ||
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r2483 | |||
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r2712 | QT_CHARTS_BEGIN_NAMESPACE | ||
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r2483 | |||
PolarChartLogValueAxisRadial::PolarChartLogValueAxisRadial(QLogValueAxis *axis, QGraphicsItem *item) | ||||
: PolarChartAxisRadial(axis, item) | ||||
{ | ||||
QObject::connect(axis, SIGNAL(baseChanged(qreal)), this, SLOT(handleBaseChanged(qreal))); | ||||
QObject::connect(axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString))); | ||||
} | ||||
PolarChartLogValueAxisRadial::~PolarChartLogValueAxisRadial() | ||||
{ | ||||
} | ||||
QVector<qreal> PolarChartLogValueAxisRadial::calculateLayout() const | ||||
{ | ||||
QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis()); | ||||
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r2775 | const qreal logMax = std::log10(logValueAxis->max()) / std::log10(logValueAxis->base()); | ||
const qreal logMin = std::log10(logValueAxis->min()) / std::log10(logValueAxis->base()); | ||||
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r2483 | const qreal innerEdge = logMin < logMax ? logMin : logMax; | ||
const qreal outerEdge = logMin > logMax ? logMin : logMax; | ||||
const qreal delta = (axisGeometry().width() / 2.0) / qAbs(logMax - logMin); | ||||
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r2775 | const qreal initialSpan = (qCeil(innerEdge) - innerEdge) * delta; | ||
int tickCount = qAbs(qCeil(logMax) - qCeil(logMin)); | ||||
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r2483 | |||
// Extra tick if outer edge is exactly at the tick | ||||
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r2775 | if (outerEdge == qCeil(outerEdge)) | ||
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r2483 | tickCount++; | ||
QVector<qreal> points; | ||||
points.resize(tickCount); | ||||
for (int i = 0; i < tickCount; ++i) { | ||||
qreal radialCoordinate = initialSpan + (delta * qreal(i)); | ||||
points[i] = radialCoordinate; | ||||
} | ||||
return points; | ||||
} | ||||
void PolarChartLogValueAxisRadial::createAxisLabels(const QVector<qreal> &layout) | ||||
{ | ||||
QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis()); | ||||
setLabels(createLogValueLabels(logValueAxis->min(), | ||||
logValueAxis->max(), | ||||
logValueAxis->base(), | ||||
layout.size(), | ||||
logValueAxis->labelFormat())); | ||||
} | ||||
void PolarChartLogValueAxisRadial::handleBaseChanged(qreal base) | ||||
{ | ||||
Q_UNUSED(base); | ||||
QGraphicsLayoutItem::updateGeometry(); | ||||
if (presenter()) | ||||
presenter()->layout()->invalidate(); | ||||
} | ||||
void PolarChartLogValueAxisRadial::handleLabelFormatChanged(const QString &format) | ||||
{ | ||||
Q_UNUSED(format); | ||||
QGraphicsLayoutItem::updateGeometry(); | ||||
if (presenter()) | ||||
presenter()->layout()->invalidate(); | ||||
} | ||||
#include "moc_polarchartlogvalueaxisradial_p.cpp" | ||||
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r2712 | QT_CHARTS_END_NAMESPACE | ||