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| #include "declarativepolarchart_p.h" |
| #include <QtCharts/QChart> |
| |
| QT_CHARTS_BEGIN_NAMESPACE |
| |
| /*! |
| \qmltype PolarChartView |
| \inherits ChartView |
| \instantiates DeclarativePolarChart |
| \inqmlmodule QtCharts |
| |
| \brief Presents data in polar charts. |
| |
| Polar charts present data in a circular graph, where the placement of data |
| is based on the angle and distance from the center of the graph, the |
| \e pole. |
| |
| \image examples_qmlpolarchart1.png |
| |
| A polar chart is a specialization of the ChartView type. It supports line, |
| spline, area, and scatter series, and all axis types supported by them. Each |
| axis can be used either as a radial or an angular axis. |
| |
| The first and last tick mark on an angular ValueAxis are co-located at a |
| 0/360 degree angle. |
| |
| If the angular distance between two consecutive points in a series is more |
| than 180 degrees, any direct line connecting the two points becomes |
| meaningless, and will not be drawn. Instead, a line will be drawn to and |
| from the center of the chart. Therefore, the axis ranges must be chosen |
| accordingly when displaying line, spline, or area series. |
| |
| Polar charts draw all axes of the same orientation in the same position, so |
| using multiple axes of the same orientation can be confusing, unless the |
| extra axes are only used to customize the grid. For example, you can display |
| a highlighted range with a secondary shaded CategoryAxis or provide |
| unlabeled subticks with a secondary ValueAxis thas has hidden labels. |
| |
| The following QML code shows how to create a polar chart with a spline and |
| scatter series and two value axes: |
| \snippet qmlpolarchart/qml/qmlpolarchart/View1.qml 1 |
| */ |
| |
| DeclarativePolarChart::DeclarativePolarChart(QQuickItem *parent) |
| : DeclarativeChart(QChart::ChartTypePolar, parent) |
| { |
| } |
| |
| DeclarativePolarChart::~DeclarativePolarChart() |
| { |
| } |
| |
| QT_CHARTS_END_NAMESPACE |
| |
| #include "moc_declarativepolarchart_p.cpp" |