QVPieModelMapper

The QVPieModelMapper is a vertical model mapper for pie series. More…

Synopsis

Functions

• def firstRow ()

• def labelsColumn ()

• def rowCount ()

• def setFirstRow (firstRow)

• def setLabelsColumn (labelsColumn)

• def setRowCount (rowCount)

• def setValuesColumn (valuesColumn)

• def valuesColumn ()

Signals

• def firstRowChanged ()

• def labelsColumnChanged ()

• def modelReplaced ()

• def rowCountChanged ()

• def seriesReplaced ()

• def valuesColumnChanged ()

Detailed Description

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 data model and QPieSeries , so that each row in the data model defines a pie slice and each column maps to the label or the value of the pie slice.

Both model and pie series properties can be used to manipulate the data. The model mapper keeps the pie series and the data model in sync.

class PySide6.QtCharts.QVPieModelMapper([parent=None])

Parameters

parent – PySide6.QtCore.QObject

Constructs a mapper object that is a child of parent.

PySide6.QtCharts.QVPieModelMapper.firstRow()

Return type

int

This property holds The row of the model that contains the first slice value..

The minimum and default value is 0.

PySide6.QtCharts.QVPieModelMapper.firstRowChanged()

PySide6.QtCharts.QVPieModelMapper.labelsColumn()

Return type

int

This property holds The column of the model that is kept in sync with the labels of the pie’s slices..

The default value is -1 (invalid mapping).

PySide6.QtCharts.QVPieModelMapper.labelsColumnChanged()

PySide6.QtCharts.QVPieModelMapper.modelReplaced()

PySide6.QtCharts.QVPieModelMapper.rowCount()

Return type

int

This property holds The number of rows of the model that are mapped as the data for a pie series..

The minimum and default value is -1 (number limited by the number of rows in the model).

PySide6.QtCharts.QVPieModelMapper.rowCountChanged()

PySide6.QtCharts.QVPieModelMapper.seriesReplaced()

PySide6.QtCharts.QVPieModelMapper.setFirstRow(firstRow)

Parameters

firstRow – int

This property holds The row of the model that contains the first slice value..

The minimum and default value is 0.

PySide6.QtCharts.QVPieModelMapper.setLabelsColumn(labelsColumn)

Parameters

labelsColumn – int

This property holds The column of the model that is kept in sync with the labels of the pie’s slices..

The default value is -1 (invalid mapping).

PySide6.QtCharts.QVPieModelMapper.setRowCount(rowCount)

Parameters

rowCount – int

This property holds The number of rows of the model that are mapped as the data for a pie series..

The minimum and default value is -1 (number limited by the number of rows in the model).

PySide6.QtCharts.QVPieModelMapper.setValuesColumn(valuesColumn)

Parameters

valuesColumn – int

This property holds The column of the model that is kept in sync with the values of the pie’s slices..

The default value is -1 (invalid mapping).

PySide6.QtCharts.QVPieModelMapper.valuesColumn()

Return type

int

This property holds The column of the model that is kept in sync with the values of the pie’s slices..

The default value is -1 (invalid mapping).

PySide6.QtCharts.QVPieModelMapper.valuesColumnChanged()