examples-polarchart.qdoc
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Miikka Heikkinen
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r2483 | /*! | ||
| \example examples/polarchart | ||||
Nico Vertriest
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r2610 | \title Polar Chart Example | ||
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Miikka Heikkinen
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r2483 | \subtitle | ||
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Nico Vertriest
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r2610 | The example shows how to create a simple polar chart with multiple different series. | ||
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Miikka Heikkinen
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r2483 | It also shows how to implement scrolling and zooming of the polar chart as well as | ||
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Nico Vertriest
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r2610 | visually demonstrate how polar charts and cartesian charts relate to each other. | ||
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Miikka Heikkinen
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r2483 | |||
| \image examples_polarchart.png | ||||
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Nico Vertriest
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r2610 | Creating a polar chart is done with a QPolarChart instance instead of a QChart instance. | ||
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Miikka Heikkinen
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r2483 | |||
| \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 | ||||
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Nico Vertriest
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r2610 | 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. | ||||
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Miikka Heikkinen
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r2483 | Another difference is that zooming to a rectangle cannot be done. | ||
| \snippet ../examples/polarchart/chartview.cpp 1 | ||||
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Nico Vertriest
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r2610 | 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. | ||||
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Miikka Heikkinen
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r2483 | |||
| \snippet ../examples/polarchart/chartview.cpp 2 | ||||
| */ | ||||