| 1 | // Copyright (C) 2021 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only |
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| 3 | |
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| 4 | #include <QtCharts/qlogvalueaxis.h> |
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| 5 | #include <QtCore/qmath.h> |
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| 6 | #include <private/abstractchartlayout_p.h> |
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| 7 | #include <private/chartpresenter_p.h> |
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| 8 | #include <private/polarchartlogvalueaxisradial_p.h> |
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| 9 | |
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| 10 | QT_BEGIN_NAMESPACE |
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| 11 | |
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| 12 | PolarChartLogValueAxisRadial::PolarChartLogValueAxisRadial(QLogValueAxis *axis, QGraphicsItem *item) |
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| 13 | : PolarChartAxisRadial(axis, item) |
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| 14 | { |
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| 15 | QObject::connect(sender: axis, SIGNAL(baseChanged(qreal)), receiver: this, SLOT(handleBaseChanged(qreal))); |
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| 16 | QObject::connect(sender: axis, SIGNAL(labelFormatChanged(QString)), |
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| 17 | receiver: this, SLOT(handleLabelFormatChanged(QString))); |
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| 18 | } |
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| 19 | |
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| 20 | PolarChartLogValueAxisRadial::~PolarChartLogValueAxisRadial() |
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| 21 | { |
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| 22 | } |
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| 23 | |
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| 24 | QList<qreal> PolarChartLogValueAxisRadial::calculateLayout() const |
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| 25 | { |
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| 26 | QLogValueAxis *logValueAxis = qobject_cast<QLogValueAxis *>(object: axis()); |
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| 27 | |
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| 28 | QList<qreal> points; |
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| 29 | points.resize(size: logValueAxis->tickCount()); |
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| 30 | |
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| 31 | const qreal logMax = qLn(v: logValueAxis->max()) / qLn(v: logValueAxis->base()); |
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| 32 | const qreal logMin = qLn(v: logValueAxis->min()) / qLn(v: logValueAxis->base()); |
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| 33 | const qreal innerEdge = logMin < logMax ? logMin : logMax; |
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| 34 | const qreal delta = (axisGeometry().width() / 2.0) / qAbs(t: logMax - logMin); |
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| 35 | const qreal initialSpan = (std::ceil(x: innerEdge) - innerEdge) * delta; |
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| 36 | |
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| 37 | for (int i = 0; i < logValueAxis->tickCount(); ++i) |
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| 38 | points[i] = initialSpan + (delta * qreal(i)); |
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| 39 | |
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| 40 | return points; |
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| 41 | } |
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| 42 | |
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| 43 | void PolarChartLogValueAxisRadial::createAxisLabels(const QList<qreal> &layout) |
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| 44 | { |
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| 45 | QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis()); |
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| 46 | setLabels(createLogValueLabels(min: logValueAxis->min(), |
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| 47 | max: logValueAxis->max(), |
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| 48 | base: logValueAxis->base(), |
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| 49 | ticks: layout.size(), |
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| 50 | format: logValueAxis->labelFormat())); |
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| 51 | } |
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| 52 | |
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| 53 | void PolarChartLogValueAxisRadial::handleBaseChanged(qreal base) |
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| 54 | { |
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| 55 | Q_UNUSED(base); |
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| 56 | QGraphicsLayoutItem::updateGeometry(); |
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| 57 | if (presenter()) |
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| 58 | presenter()->layout()->invalidate(); |
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| 59 | } |
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| 60 | |
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| 61 | void PolarChartLogValueAxisRadial::handleLabelFormatChanged(const QString &format) |
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| 62 | { |
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| 63 | Q_UNUSED(format); |
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| 64 | QGraphicsLayoutItem::updateGeometry(); |
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| 65 | if (presenter()) |
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| 66 | presenter()->layout()->invalidate(); |
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| 67 | } |
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| 68 | |
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| 69 | QT_END_NAMESPACE |
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| 70 | |
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| 71 | #include "moc_polarchartlogvalueaxisradial_p.cpp" |
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| 72 | |
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