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29
30#include <QtCharts/qlogvalueaxis.h>
31#include <QtCore/qmath.h>
32#include <private/abstractchartlayout_p.h>
33#include <private/chartpresenter_p.h>
34#include <private/polarchartlogvalueaxisangular_p.h>
35
36QT_CHARTS_BEGIN_NAMESPACE
37
38PolarChartLogValueAxisAngular::PolarChartLogValueAxisAngular(QLogValueAxis *axis,
39 QGraphicsItem *item)
40 : PolarChartAxisAngular(axis, item)
41{
42 QObject::connect(sender: axis, SIGNAL(baseChanged(qreal)), receiver: this, SLOT(handleBaseChanged(qreal)));
43 QObject::connect(sender: axis, SIGNAL(labelFormatChanged(QString)),
44 receiver: this, SLOT(handleLabelFormatChanged(QString)));
45}
46
47PolarChartLogValueAxisAngular::~PolarChartLogValueAxisAngular()
48{
49}
50
51QVector<qreal> PolarChartLogValueAxisAngular::calculateLayout() const
52{
53 QLogValueAxis *logValueAxis = qobject_cast<QLogValueAxis *>(object: axis());
54
55 QVector<qreal> points;
56 points.resize(size: logValueAxis->tickCount());
57
58 const qreal logMax = std::log10(x: logValueAxis->max()) / std::log10(x: logValueAxis->base());
59 const qreal logMin = std::log10(x: logValueAxis->min()) / std::log10(x: logValueAxis->base());
60 const qreal startEdge = qMin(a: logMin, b: logMax);
61 const qreal delta = 360.0 / qAbs(t: logMax - logMin);
62 const qreal initialSpan = (qCeil(v: startEdge) - startEdge) * delta;
63
64 for (int i = 0; i < logValueAxis->tickCount(); ++i)
65 points[i] = initialSpan + (delta * qreal(i));
66
67 return points;
68}
69
70void PolarChartLogValueAxisAngular::createAxisLabels(const QVector<qreal> &layout)
71{
72 QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis());
73 setLabels(createLogValueLabels(min: logValueAxis->min(),
74 max: logValueAxis->max(),
75 base: logValueAxis->base(),
76 ticks: layout.size(),
77 format: logValueAxis->labelFormat()));
78}
79
80void PolarChartLogValueAxisAngular::handleBaseChanged(qreal base)
81{
82 Q_UNUSED(base);
83 QGraphicsLayoutItem::updateGeometry();
84 if (presenter())
85 presenter()->layout()->invalidate();
86}
87
88void PolarChartLogValueAxisAngular::handleLabelFormatChanged(const QString &format)
89{
90 Q_UNUSED(format);
91 QGraphicsLayoutItem::updateGeometry();
92 if (presenter())
93 presenter()->layout()->invalidate();
94}
95
96QT_CHARTS_END_NAMESPACE
97
98#include "moc_polarchartlogvalueaxisangular_p.cpp"
99

source code of qtcharts/src/charts/axis/logvalueaxis/polarchartlogvalueaxisangular.cpp