- Qt 6.8
- Qt Charts
- C++ Classes
- QCandlestickModelMapper
- Qt Charts | Commercial or GPLv3

# QCandlestickModelMapper Class

Abstract model mapper class for candlestick series. More...

Header: | #include <QCandlestickModelMapper>
Inherits: | QObject
Inherited By: | QHCandlestickModelMapper and QVCandlestickModelMapper

- List of all members, including inherited members

## Properties

- model : QAbstractItemModel*
- series : QCandlestickSeries*

## Public Functions

| QCandlestickModelMapper(QObject *parent = nullptr)
QAbstractItemModel * | model() const
virtual Qt::Orientation | orientation() const = 0
QCandlestickSeries * | series() const
void | setModel(QAbstractItemModel *model)
void | setSeries(QCandlestickSeries *series)

## Signals

void | modelReplaced()
void | seriesReplaced()

## Protected Functions

int | close() const
int | firstSetSection() const
int | high() const
int | lastSetSection() const
int | low() const
int | open() const
void | setClose(int close)
void | setFirstSetSection(int firstSetSection)
void | setHigh(int high)
void | setLastSetSection(int lastSetSection)
void | setLow(int low)
void | setOpen(int open)
void | setTimestamp(int timestamp)
int | timestamp() const

## Detailed Description

Model mappers allow the use of a QAbstractItemModel-derived model as a data source for a chart series, creating a connection between a QCandlestickSeries and the model object. A model mapper maintains an equal size across all QCandlestickSets.

Note: The model used must support adding and removing rows/columns and modifying the data of the cells.

## Property Documentation

### model : QAbstractItemModel*

Defines the model that is used by the mapper.

Access functions:

QAbstractItemModel * | model() const
void | setModel(QAbstractItemModel *model)

Notifier signal:

void | modelReplaced()

### series : QCandlestickSeries*

Defines the QCandlestickSeries object that is used by the mapper.

Note: All data in the series is discarded when it is set to the mapper. When a new series is specified, the old series is disconnected (preserving its data).

Access functions:

QCandlestickSeries * | series() const
void | setSeries(QCandlestickSeries *series)

Notifier signal:

void | seriesReplaced()

## Member Function Documentation

### `[explicit]` QCandlestickModelMapper::QCandlestickModelMapper(QObject *parent = nullptr)

Constructs a model mapper object as a child of parent.

### `[protected]` int QCandlestickModelMapper::close() const

Returns the row/column of the model that contains the close values of the sets in the series. Default value is -1 (invalid mapping).

See also setClose().

### `[protected]` int QCandlestickModelMapper::firstSetSection() const

Returns the section of the model that is used as the data source for the first candlestick set. Default value is -1 (invalid mapping).

See also setFirstSetSection().

### `[protected]` int QCandlestickModelMapper::high() const

Returns the row/column of the model that contains the high values of the sets in the series. Default value is -1 (invalid mapping).

See also setHigh().

### `[protected]` int QCandlestickModelMapper::lastSetSection() const

Returns the section of the model that is used as the data source for the last candlestick set. Default value is -1 (invalid mapping).

See also setLastSetSection().

### `[protected]` int QCandlestickModelMapper::low() const

Returns the row/column of the model that contains the low values of the sets in the series. Default value is -1 (invalid mapping).

See also setLow().

### `[signal]` void QCandlestickModelMapper::modelReplaced()

Emitted when the model, to which the mapper is connected, has changed.

Note: Notifier signal for property model.

See also model.

### `[protected]` int QCandlestickModelMapper::open() const

Returns the row/column of the model that contains the open values of the sets in the series. Default value is -1 (invalid mapping).

See also setOpen().

### `[pure virtual]` Qt::Orientation QCandlestickModelMapper::orientation() const

Returns the orientation that is used when QCandlestickModelMapper accesses the model. This determines whether the consecutive values of the set are read from rows (Qt::Horizontal) or from columns (Qt::Vertical).

### `[signal]` void QCandlestickModelMapper::seriesReplaced()

Emitted when the series to which mapper is connected to has changed.

Note: Notifier signal for property series.

See also series.

### `[protected]` void QCandlestickModelMapper::setClose(int close)

Sets the row/column of the model that contains the close values of the sets in the series. Default value is -1 (invalid mapping).

See also close().

### `[protected]` void QCandlestickModelMapper::setFirstSetSection(int firstSetSection)

Sets the section of the model that is used as the data source for the first candlestick set. Parameter firstSetSection specifies the section of the model. Default value is -1.

See also firstSetSection().

### `[protected]` void QCandlestickModelMapper::setHigh(int high)

Sets the row/column of the model that contains the high values of the sets in the series. Default value is -1 (invalid mapping).

See also high().

### `[protected]` void QCandlestickModelMapper::setLastSetSection(int lastSetSection)

Sets the section of the model that is used as the data source for the last candlestick set. Parameter lastSetSection specifies the section of the model. Default value is -1.

See also lastSetSection().

### `[protected]` void QCandlestickModelMapper::setLow(int low)

Sets the row/column of the model that contains the low values of the sets in the series. Default value is -1 (invalid mapping).

See also low().

### `[protected]` void QCandlestickModelMapper::setOpen(int open)

Sets the row/column of the model that contains the open values of the sets in the series. Default value is -1 (invalid mapping).

See also open().

### `[protected]` void QCandlestickModelMapper::setTimestamp(int timestamp)

Sets the row/column of the model that contains the timestamp values of the sets in the series. Default value is -1 (invalid mapping).

See also timestamp().

### `[protected]` int QCandlestickModelMapper::timestamp() const

Returns the row/column of the model that contains the timestamp values of the sets in the series. Default value is -1 (invalid mapping).

See also setTimestamp().