QVBarModelMapper Class

The QVBarModelMapper class is a vertical model mapper for bar series. More...

Header:	#include <QVBarModelMapper>
Instantiated By:	VBarModelMapper
Inherits:	QObject

• List of all members, including inherited members

Properties

firstBarSetColumn : int firstRow : int lastBarSetColumn : int

model : QAbstractItemModel* rowCount : int series : QtCharts::QAbstractBarSeries*

Public Functions

	QVBarModelMapper(QObject *parent = nullptr)
int	firstBarSetColumn() const
int	firstRow() const
int	lastBarSetColumn() const
QAbstractItemModel *	model() const
int	rowCount() const
QAbstractBarSeries *	series() const
void	setFirstBarSetColumn(int firstBarSetColumn)
void	setFirstRow(int firstRow)
void	setLastBarSetColumn(int lastBarSetColumn)
void	setModel(QAbstractItemModel *model)
void	setRowCount(int rowCount)
void	setSeries(QAbstractBarSeries *series)

Signals

void	firstBarSetColumnChanged()
void	firstRowChanged()
void	lastBarSetColumnChanged()
void	modelReplaced()
void	rowCountChanged()
void	seriesReplaced()

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

For more information, see BarModelMapper Example.

See also QHBarModelMapper.

Member Function Documentation

QVBarModelMapper::QVBarModelMapper(QObject *parent = nullptr)

Constructs a mapper object that is a child of parent.

[signal] void QVBarModelMapper::firstBarSetColumnChanged()

This signal is emitted when the first bar set column changes.

Note: Notifier signal for property firstBarSetColumn.

[signal] void QVBarModelMapper::firstRowChanged()

This signal is emitted when the first row changes.

Note: Notifier signal for property firstRow.

[signal] void QVBarModelMapper::lastBarSetColumnChanged()

This signal is emitted when the last bar set column changes.

Note: Notifier signal for property lastBarSetColumn.

[signal] void QVBarModelMapper::modelReplaced()

This signal is emitted when the model that the mapper is connected to changes.

Note: Notifier signal for property model.

[signal] void QVBarModelMapper::rowCountChanged()

This signal is emitted when the number of rows changes.

Note: Notifier signal for property rowCount.

[signal] void QVBarModelMapper::seriesReplaced()

This signal is emitted when the bar series that the mapper is connected to changes.

Note: Notifier signal for property series.