examples-presenterchart.qdoc
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Michal Klocek
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r482 | /*! | |
Tero Ahola
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r500 | \example examples/presenterchart | |
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Michal Klocek
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r482 | \title PresenterChart Example | |
| \subtitle | |||
| The example shows how to create chart which presents the same set of data as line, scatter and spline charts. | |||
| ChartPresenter will switch between these three chart types every few seconds. | |||
| Please note this example does not use common data model. A use of common data model is documented here.[TODO] | |||
| \image presenterchart1.png | |||
| \image presenterchart2.png | |||
| \image presenterchart3.png | |||
| We create simple ChartView class which derives form QChartView. | |||
sauimone
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r496 | \snippet ../examples/presenterchart/chartview.h 1 | |
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Michal Klocek
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r482 | ||
| Class will implement \c handleTimeout() slot which we are going to use to trigger switching between different chart presentations. | |||
| 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 | |||
| using QLineSeries , as scatter chart using QScatterSeries, and as a spline chart using QSplineSeries. We create needed instances in constructor of ChartView class. | |||
| We set custom line and points colors. | |||
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sauimone
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r496 | \snippet ../examples/presenterchart/chartview.cpp 1 | |
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Michal Klocek
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r482 | ||
| We add data to all three series. We can use add() member function. If data set is large,it is wiser to use shared data model, as described here.[TODO] | |||
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sauimone
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r496 | \snippet ../examples/presenterchart/chartview.cpp 2 | |
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Michal Klocek
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r482 | ||
| In the end we store references all the created series and matching titles. | |||
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sauimone
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r496 | \snippet ../examples/presenterchart/chartview.cpp 3 | |
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Michal Klocek
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r482 | ||
| 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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sauimone
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r496 | \snippet ../examples/presenterchart/chartview.cpp 4 | |
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Michal Klocek
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r482 | ||
| */ |