QHCandlestickModelMapper Class

The QHCandlestickModelMapper class is a horizontal model mapper for a candlestick series. More...

Header:	#include <QHCandlestickModelMapper>
Since:	Qt 5.8
Instantiated By:	HCandlestickModelMapper
Inherits:	QCandlestickModelMapper

• List of all members, including inherited members

Properties

closeColumn : int firstSetRow : int highColumn : int lastSetRow : int

lowColumn : int openColumn : int timestampColumn : int

Public Functions

	QHCandlestickModelMapper(QObject *parent = nullptr)
int	closeColumn() const
int	firstSetRow() const
int	highColumn() const
int	lastSetRow() const
int	lowColumn() const
int	openColumn() const
void	setCloseColumn(int closeColumn)
void	setFirstSetRow(int firstSetRow)
void	setHighColumn(int highColumn)
void	setLastSetRow(int lastSetRow)
void	setLowColumn(int lowColumn)
void	setOpenColumn(int openColumn)
void	setTimestampColumn(int timestampColumn)
int	timestampColumn() const

Reimplemented Public Functions

virtual Qt::Orientation

orientation() const override

Signals

void	closeColumnChanged()
void	firstSetRowChanged()
void	highColumnChanged()
void	lastSetRowChanged()
void	lowColumnChanged()
void	openColumnChanged()
void	timestampColumnChanged()

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 QCandlestickSeries, so that each row in the data model defines a candlestick item and each column maps to the open, high, low, close, and timestamp values of the candlestick item.

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

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

See also QCandlestickSeries, QCandlestickSet, and QVCandlestickModelMapper.

Member Function Documentation

QHCandlestickModelMapper::QHCandlestickModelMapper(QObject *parent = nullptr)

Constructs a horizontal model mapper object which is a child of parent.

[signal] void QHCandlestickModelMapper::closeColumnChanged()

Emitted when the column of the model that contains close values is changed.

Note: Notifier signal for property closeColumn.

See also closeColumn.

[signal] void QHCandlestickModelMapper::firstSetRowChanged()

Emitted when the row of the model that contains the data of the first item is changed.

Note: Notifier signal for property firstSetRow.

See also firstSetRow.

[signal] void QHCandlestickModelMapper::highColumnChanged()

Emitted when the column of the model that contains high values is changed.

Note: Notifier signal for property highColumn.

See also highColumn.

[signal] void QHCandlestickModelMapper::lastSetRowChanged()

Emitted when the row of the model that contains the data of the last item is changed.

Note: Notifier signal for property lastSetRow.

See also lastSetRow.

[signal] void QHCandlestickModelMapper::lowColumnChanged()

Emitted when the column of the model that contains low values is changed.

Note: Notifier signal for property lowColumn.

See also lowColumn.

[signal] void QHCandlestickModelMapper::openColumnChanged()

Emitted when the column of the model that contains open values is changed.

Note: Notifier signal for property openColumn.

See also openColumn.

[signal] void QHCandlestickModelMapper::timestampColumnChanged()

Emitted when the column of the model that contains timestamp values is changed

Note: Notifier signal for property timestampColumn.

See also timestampColumn.

[override virtual] Qt::Orientation QHCandlestickModelMapper::orientation() const

Reimplements: QCandlestickModelMapper::orientation() const.

Returns Qt::Horizontal. This means that values of the item are read from rows.