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Add Polar chart support...
Add Polar chart support This commit also heavily refactors things as polar chart needs separate implementation of various classes that previously only needed one, such as ChartAxis and ChartLayout. Task-number: QTRD-1757 Change-Id: I3d3db23920314987ceef3ae92879960b833b7136 Reviewed-by: Miikka Heikkinen <miikka.heikkinen@digia.com>
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examples-donutbreakdown.qdoc
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/*!
\example examples/donutbreakdown
\title Donut chart breakdown example
\subtitle
This example shows how to use create a donut breakdown chart using QPieSeries API.
\image examples_donutbreakdown.png
Let's start by defining some data for the chart.
\snippet ../examples/donutbreakdown/main.cpp 1
Then we create a chart where we add the data. Note that this is our own chart derived from QChart.
\snippet ../examples/donutbreakdown/main.cpp 2
Our own chart works so that in the constructor we create a main series
which aggregates the data provided by the breakdown series. This is the piechart in the center.
\snippet ../examples/donutbreakdown/donutbreakdownchart.cpp 1
When a breakdown series is added the data is used to create a slice in the main series and the
breakdown series itself is used to create a segment of a donut positioned so that it is aligned
with the corresponding slice in the main series.
\snippet ../examples/donutbreakdown/donutbreakdownchart.cpp 2
Here's how the start and end angles for the donut segments are calculated.
\snippet ../examples/donutbreakdown/donutbreakdownchart.cpp 3
Legend markers are customized to show the breakdown percentage and markers for the main level slices are hidden.
\snippet ../examples/donutbreakdown/donutbreakdownchart.cpp 4
Instead the main level slices show the percentage on the label.
\snippet ../examples/donutbreakdown/mainslice.cpp 1
\snippet ../examples/donutbreakdown/mainslice.cpp 2
And now that we have our chart defined we can finally create a QChartView and show the chart.
\snippet ../examples/donutbreakdown/main.cpp 3
*/