QVCandlestickModelMapper 类

QVCandlestickModelMapper 类是用于烛台系列的垂直模型映射器。 更多...

头: #include <QVCandlestickModelMapper>
Since: Qt 5.8
实例化: VCandlestickModelMapper
继承: QCandlestickModelMapper

该类在 Qt 5.8 引入。

特性

公共函数

QVCandlestickModelMapper (QObject * parent = nullptr)
int closeRow () const
int firstSetColumn () const
int highRow () const
int lastSetColumn () const
int lowRow () const
int openRow () const
void setCloseRow (int closeRow )
void setFirstSetColumn (int firstSetColumn )
void setHighRow (int highRow )
void setLastSetColumn (int lastSetColumn )
void setLowRow (int lowRow )
void setOpenRow (int openRow )
void setTimestampRow (int timestampRow )
int timestampRow () const

重实现公共函数

virtual Qt::Orientation orientation () const override

信号

void closeRowChanged ()
void firstSetColumnChanged ()
void highRowChanged ()
void lastSetColumnChanged ()
void lowRowChanged ()
void openRowChanged ()
void timestampRowChanged ()

详细描述

模型映射器允许使用的数据模型派生自 QAbstractItemModel class as a data source for a chart. A vertical model mapper is used to create a connection between a data model and QCandlestickSeries , so that each column in the data model defines a candlestick item and each row 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.

另请参阅 QCandlestickSeries , QCandlestickSet ,和 QHCandlestickModelMapper .

特性文档编制

closeRow : int

This property holds the row of the model that contains the close values of the candlestick items in the series.

默认值为 -1 (无效映射)。

访问函数:

int closeRow () const
void setCloseRow (int closeRow )

通知程序信号:

void closeRowChanged ()

firstSetColumn : int

This property holds the column of the model that is used as the data source for the first item.

默认值为 -1 (无效映射)。

访问函数:

int firstSetColumn () const
void setFirstSetColumn (int firstSetColumn )

通知程序信号:

void firstSetColumnChanged ()

highRow : int

This property holds the row of the model that contains the high values of the candlestick items in the series.

默认值为 -1 (无效映射)。

访问函数:

int highRow () const
void setHighRow (int highRow )

通知程序信号:

void highRowChanged ()

lastSetColumn : int

This property holds the column of the model that is used as the data source for the last item.

默认值为 -1 (无效映射)。

访问函数:

int lastSetColumn () const
void setLastSetColumn (int lastSetColumn )

通知程序信号:

void lastSetColumnChanged ()

lowRow : int

This property holds the row of the model that contains the low values of the candlestick items in the series.

默认值为 -1 (无效映射)。

访问函数:

int lowRow () const
void setLowRow (int lowRow )

通知程序信号:

void lowRowChanged ()

openRow : int

This property holds the row of the model that contains the open values of the candlestick items in the series.

默认值为 -1 (无效映射)。

访问函数:

int openRow () const
void setOpenRow (int openRow )

通知程序信号:

void openRowChanged ()

timestampRow : int

This property holds the row of the model that contains the timestamp values of the candlestick items in the series.

默认值为 -1 (无效映射)。

访问函数:

int timestampRow () const
void setTimestampRow (int timestampRow )

通知程序信号:

void timestampRowChanged ()

成员函数文档编制

QVCandlestickModelMapper:: QVCandlestickModelMapper ( QObject * parent = nullptr)

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

[signal] void QVCandlestickModelMapper:: closeRowChanged ()

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

注意: 通知程序信号对于特性 closeRow .

另请参阅 closeRow .

[signal] void QVCandlestickModelMapper:: firstSetColumnChanged ()

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

注意: 通知程序信号对于特性 firstSetColumn .

另请参阅 firstSetColumn .

[signal] void QVCandlestickModelMapper:: highRowChanged ()

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

注意: 通知程序信号对于特性 highRow .

另请参阅 highRow .

[signal] void QVCandlestickModelMapper:: lastSetColumnChanged ()

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

注意: 通知程序信号对于特性 lastSetColumn .

另请参阅 lastSetColumn .

[signal] void QVCandlestickModelMapper:: lowRowChanged ()

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

注意: 通知程序信号对于特性 lowRow .

另请参阅 lowRow .

[signal] void QVCandlestickModelMapper:: openRowChanged ()

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

注意: 通知程序信号对于特性 openRow .

另请参阅 openRow .

[signal] void QVCandlestickModelMapper:: timestampRowChanged ()

Emitted when the row of the model that contains timestamp values is changed.

注意: 通知程序信号对于特性 timestampRow .

另请参阅 timestampRow .

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

重实现: QCandlestickModelMapper::orientation () const.

返回 Qt::Vertical . This means that values of the item are read from columns.