|
|
/*!
|
|
|
\example example/presenterchart
|
|
|
\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.
|
|
|
|
|
|
\snippet ../example/presenterchart/chartview.h 1
|
|
|
|
|
|
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.
|
|
|
|
|
|
\snippet ../example/presenterchart/chartview.cpp 1
|
|
|
|
|
|
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]
|
|
|
|
|
|
\snippet ../example/presenterchart/chartview.cpp 2
|
|
|
|
|
|
In the end we store references all the created series and matching titles.
|
|
|
|
|
|
\snippet ../example/presenterchart/chartview.cpp 3
|
|
|
|
|
|
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.
|
|
|
|
|
|
\snippet ../example/presenterchart/chartview.cpp 4
|
|
|
|
|
|
*/
|
