QHBarModelMapper Class

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

Header:	#include <QHBarModelMapper>
Instantiated By:	HBarModelMapper
Inherits:	QObject

• List of all members, including inherited members

Properties

columnCount : int firstBarSetRow : int firstColumn : int

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

Public Functions

	QHBarModelMapper(QObject *parent = nullptr)
int	columnCount() const
int	firstBarSetRow() const
int	firstColumn() const
int	lastBarSetRow() const
QAbstractItemModel *	model() const
QAbstractBarSeries *	series() const
void	setColumnCount(int columnCount)
void	setFirstBarSetRow(int firstBarSetRow)
void	setFirstColumn(int firstColumn)
void	setLastBarSetRow(int lastBarSetRow)
void	setModel(QAbstractItemModel *model)
void	setSeries(QAbstractBarSeries *series)

Signals

void	columnCountChanged()
void	firstBarSetRowChanged()
void	firstColumnChanged()
void	lastBarSetRowChanged()
void	modelReplaced()
void	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.

Member Function Documentation

QHBarModelMapper::QHBarModelMapper(QObject *parent = nullptr)

Constructs a mapper object that is a child of parent.

[signal] void QHBarModelMapper::columnCountChanged()

This signal is emitted when the number of columns changes.

Note: Notifier signal for property columnCount.

[signal] void QHBarModelMapper::firstBarSetRowChanged()

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

Note: Notifier signal for property firstBarSetRow.

[signal] void QHBarModelMapper::firstColumnChanged()

This signal is emitted when the first column changes.

Note: Notifier signal for property firstColumn.

[signal] void QHBarModelMapper::lastBarSetRowChanged()

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

Note: Notifier signal for property lastBarSetRow.

[signal] void QHBarModelMapper::modelReplaced()

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

Note: Notifier signal for property model.

[signal] void QHBarModelMapper::seriesReplaced()

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

Note: Notifier signal for property series.