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()#
This signal is emitted when the first row changes.
- 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()#
This signal is emitted when the labels column changes.
- PySide6.QtCharts.QVPieModelMapper.modelReplaced()#
This signal is emitted when the model that the mapper is connected to changes.
- 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()#
This signal is emitted when the number of rows changes.
- PySide6.QtCharts.QVPieModelMapper.seriesReplaced()#
This signal is emitted when the series that the mapper is connected to changes.
- 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()#
This signal is emitted when the values column changes.