Model mappers enable using a data model derived from the
QAbstractItemModel class as a data source for a chart. A horizontal model mapper is used to create a connection between a line, spline, or scatter series and the data model that has X and Y rows for the coordinates and holds the data points for the XYSeries as columns. A TableModel is a natural choice for the model.
Both model and series properties can be used to manipulate the data. The model mapper keeps the series and the data model in sync.
Constructs a mapper object that is a child of
columnCount – int
firstColumn – int
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