QHBarModelMapper

The QHBarModelMapper class is a horizontal model mapper for bar series. More…

Synopsis

Functions

• def columnCount ()

• def firstBarSetRow ()

• def firstColumn ()

• def lastBarSetRow ()

• def setColumnCount (columnCount)

• def setFirstBarSetRow (firstBarSetRow)

• def setFirstColumn (firstColumn)

• def setLastBarSetRow (lastBarSetRow)

Signals

• def columnCountChanged ()

• def firstBarSetRowChanged ()

• def firstColumnChanged ()

• def lastBarSetRowChanged ()

• def modelReplaced ()

• def seriesReplaced ()

Detailed Description

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 data model and QAbstractBarSeries , so that each row in the data model defines a bar set and each column maps to a category in a bar series.

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

The model mapper ensures that all the bar sets in the bar series have equal sizes. Therefore, adding or removing a value from a bar set causes the same change to be made in all the bar sets in the bar series.

See also

QVBarModelMapper

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

Parameters

parent – PySide6.QtCore.QObject

Constructs a mapper object that is a child of parent.

PySide6.QtCharts.QHBarModelMapper.columnCount()

Return type

int

This property holds The number of columns of the model that are mapped as the data for the bar series..

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

PySide6.QtCharts.QHBarModelMapper.columnCountChanged()

PySide6.QtCharts.QHBarModelMapper.firstBarSetRow()

Return type

int

This property holds The row of the model that is used as the data source for the first bar set..

The default value is -1 (invalid mapping).

PySide6.QtCharts.QHBarModelMapper.firstBarSetRowChanged()

PySide6.QtCharts.QHBarModelMapper.firstColumn()

Return type

int

This property holds The column of the model that contains the first values of the bar sets in the bar series..

The minimum and default value is 0.

PySide6.QtCharts.QHBarModelMapper.firstColumnChanged()

PySide6.QtCharts.QHBarModelMapper.lastBarSetRow()

Return type

int

This property holds The row of the model that is used as the data source for the last bar set..

The default value is -1 (invalid mapping).

PySide6.QtCharts.QHBarModelMapper.lastBarSetRowChanged()

PySide6.QtCharts.QHBarModelMapper.modelReplaced()

PySide6.QtCharts.QHBarModelMapper.seriesReplaced()

PySide6.QtCharts.QHBarModelMapper.setColumnCount(columnCount)

Parameters

columnCount – int

This property holds The number of columns of the model that are mapped as the data for the bar series..

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

PySide6.QtCharts.QHBarModelMapper.setFirstBarSetRow(firstBarSetRow)

Parameters

firstBarSetRow – int

This property holds The row of the model that is used as the data source for the first bar set..

The default value is -1 (invalid mapping).

PySide6.QtCharts.QHBarModelMapper.setFirstColumn(firstColumn)

Parameters

firstColumn – int

This property holds The column of the model that contains the first values of the bar sets in the bar series..

The minimum and default value is 0.

PySide6.QtCharts.QHBarModelMapper.setLastBarSetRow(lastBarSetRow)

Parameters

lastBarSetRow – int

This property holds The row of the model that is used as the data source for the last bar set..

The default value is -1 (invalid mapping).