VXYModelMapper QML Type
|Import Statement:||import QtCharts 2.4|
Model mappers enable using a data model derived from the QAbstractItemModel class as a data source for a chart. A vertical model mapper is used to create a connection between a line, spline, or scatter series and the data model that has X and Y columns for the coordinates and holds the data points for the XYSeries as rows. 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.
firstRow : int
The row of the model that contains the data for the first point of the series. The default value is 0.
model : SomeModel
The data model that is used by the mapper. You need to implement the model and expose it to QML.
Note: The model has to support adding and removing rows or columns and modifying the data in the cells.
rowCount : int
The number of rows of the model that are mapped as the data for series. The default value is -1 (the number is limited by the number of rows in the model).
series : XYSeries
The series that is used by the mapper. All the data in the series is discarded when it is set to the mapper. When a new series is specified, the old series is disconnected (but it preserves its data).
xColumn : int
The column of the model that contains the x-coordinates of data points. The default value is -1 (invalid mapping).
yColumn : int
The column of the model that contains the y-coordinates of data points. The default value is -1 (invalid mapping).
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