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/*!
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\example examples/lineandbar
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\title Line and BarChart Example
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\subtitle
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The example shows how to combine different charts and set the axes. In the example we combine linechart with
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barchart and use category axis as common axis for both.
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\image examples_lineandbar.png
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Here we create data for our barseries.
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\snippet ../examples/lineandbar/main.cpp 1
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We create the barseries and append the sets to it.
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First value of each set are gropuped together at first category second value to second category and so on.
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\snippet ../examples/lineandbar/main.cpp 2
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Then we create lineseries and add data to it. To make data match with barchart we use index as an x-value for our line series, so that
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first point is at (0,value) second at (1,value) and so on.
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\snippet ../examples/lineandbar/main.cpp 8
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Here we create the chart and add both series to it.
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\snippet ../examples/lineandbar/main.cpp 3
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To make chart show series properly, we have to create custom axes for series. If we don't create custom axes, then each series will get scaled to
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use maximum area of the chart (like in single series case) and result will be incorrect. With custom axes we set the range of both series to follow same
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axis. For x-axis we use QBarCategoryAxis and for y-axis we use QValuesAxis.
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\snippet ../examples/lineandbar/main.cpp 4
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And we also want to show the legend.
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\snippet ../examples/lineandbar/main.cpp 5
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Finally we add the chart onto a view.
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\snippet ../examples/lineandbar/main.cpp 6
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And it is ready to be shown in a window.
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\snippet ../examples/lineandbar/main.cpp 7
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*/
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