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-/*!
- \example examples/polarchart
- \title Polar Chart Example
- \subtitle
-
- The example shows how to create a simple polar chart with multiple different series.
- It also shows how to implement scrolling and zooming of the polar chart as well as
- visually demonstrate how polar charts and cartesian charts relate to each other.
-
- \image examples_polarchart.png
-
- Creating a polar chart is done with a QPolarChart instance instead of a QChart instance.
-
- \snippet ../examples/polarchart/main.cpp 1
-
- Axes are created similarly to cartesian charts, but when axes are added to the chart,
- you can use polar orientations instead of alignments.
-
- \snippet ../examples/polarchart/main.cpp 2
-
- Zooming and scrolling of a polar chart is logically nearly identical to zooming and scrolling of a cartesian chart.
- The main difference is that when scrolling along the X-axis (angular axis), the angle is used instead of the number of pixels.
- Another difference is that zooming to a rectangle cannot be done.
-
- \snippet ../examples/polarchart/chartview.cpp 1
-
- The same axes and series can be used in both cartesian and polar charts, though not simultaneously.
- To switch between chart types, you first need to remove the series and axes from the old chart, and then add
- them to the new chart. If you want to preserve the axis ranges, those need to be copied, too.
-
- \snippet ../examples/polarchart/chartview.cpp 2
-
-*/