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/*!
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\example examples/presenterchart
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\title PresenterChart Example
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\subtitle
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The example shows how to create chart which presents the same set of data as line, scatter, spline and area charts.
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ChartPresenter will switch between these four chart types every few seconds.
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Please note this example does not use common data model. A use of common data model is documented here.[TODO]
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\image presenterchart1.png
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\image presenterchart2.png
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\image presenterchart3.png
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\image presenterchart4.png
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We create simple ChartView class which derives form QChartView.
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\snippet ../examples/presenterchart/chartview.h 1
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Class will implement \c handleTimeout() slot which we are going to use to trigger switching between different chart presentations.
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We are also going to provide \c handlePoitClicked() slot which will show clicked point on the chart.
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Class members \c m_series and \c m_titles are going to store series and related titles. In example we are going to present data as a line chart
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using QLineSeries , as scatter chart using QScatterSeries, as a spline chart using QSplineSeries and a area chart using QAreaSeries. We create needed instances in constructor of ChartView class.
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We set custom line and points colors.
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\snippet ../examples/presenterchart/chartview.cpp 1
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We add data to three series. Please note area chart is going to use QLineSeries as the upper line. We can use add() member function. If data set is large,
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it is wiser to use shared data model, as described here.[TODO]
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\snippet ../examples/presenterchart/chartview.cpp 2
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In the end we store references all the created series and matching titles.
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\snippet ../examples/presenterchart/chartview.cpp 3
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We connect \c clicked() signals from each series with our \c handlePointClciked() slot.
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\snippet ../examples/presenterchart/chartview.cpp 4
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In \c handleTimeout() slot we change currently displayed chart by removing previous series and adding next series from the \c m_series list. We also set proper title.
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\snippet ../examples/presenterchart/chartview.cpp 5
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In \c handlePointClciked() slot we set the chart's title to show clicked point x and y coordinates.
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\snippet ../examples/presenterchart/chartview.cpp 6
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*/
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