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29
30#include <private/polarchartcategoryaxisradial_p.h>
31#include <private/chartpresenter_p.h>
32#include <private/abstractchartlayout_p.h>
33#include <QtCharts/QCategoryAxis>
34#include <QtCore/QDebug>
35
36QT_CHARTS_BEGIN_NAMESPACE
37
38PolarChartCategoryAxisRadial::PolarChartCategoryAxisRadial(QCategoryAxis *axis, QGraphicsItem *item)
39 : PolarChartAxisRadial(axis, item, true)
40{
41 QObject::connect(sender: axis, SIGNAL(categoriesChanged()), receiver: this, SLOT(handleCategoriesChanged()));
42}
43
44PolarChartCategoryAxisRadial::~PolarChartCategoryAxisRadial()
45{
46}
47
48QVector<qreal> PolarChartCategoryAxisRadial::calculateLayout() const
49{
50 QCategoryAxis *catAxis = static_cast<QCategoryAxis *>(axis());
51 int tickCount = catAxis->categoriesLabels().count() + 1;
52 QVector<qreal> points;
53
54 if (tickCount < 2)
55 return points;
56
57 qreal range = max() - min();
58 if (range > 0) {
59 points.resize(size: tickCount);
60 qreal scale = (axisGeometry().width() / 2) / range;
61 qreal angle;
62 for (int i = 0; i < tickCount; ++i) {
63 if (i < tickCount - 1)
64 angle = (catAxis->startValue(categoryLabel: catAxis->categoriesLabels().at(i)) - min()) * scale;
65 else
66 angle = (catAxis->endValue(categoryLabel: catAxis->categoriesLabels().at(i: i - 1)) - min()) * scale;
67 points[i] = angle;
68 }
69 }
70
71 return points;
72}
73
74void PolarChartCategoryAxisRadial::createAxisLabels(const QVector<qreal> &layout)
75{
76 Q_UNUSED(layout);
77 setLabels(static_cast<QCategoryAxis *>(axis())->categoriesLabels() << QString());
78}
79
80void PolarChartCategoryAxisRadial::handleCategoriesChanged()
81{
82 QGraphicsLayoutItem::updateGeometry();
83 presenter()->layout()->invalidate();
84}
85
86QT_CHARTS_END_NAMESPACE
87
88#include "moc_polarchartcategoryaxisradial_p.cpp"
89

source code of qtcharts/src/charts/axis/categoryaxis/polarchartcategoryaxisradial.cpp