内容

• 特性
• 公共函数
• 信号
• 详细描述

QVXYModelMapper 类

QVXYModelMapper 类是一个用于直线、样条线及散点系列的垂直模型映射器。 更多...

头：	#include <QVXYModelMapper>
实例化：	VXYModelMapper
继承：	QXYModelMapper

• 所有成员列表，包括继承成员

特性

firstRow : int model : QAbstractItemModel* rowCount : int

series : QXYSeries* xColumn : int yColumn : int

公共函数

	QVXYModelMapper (QObject * parent = nullptr)
int	firstRow () const
QAbstractItemModel *	model () const
int	rowCount () const
QXYSeries *	series () const
void	setFirstRow (int firstRow )
void	setModel (QAbstractItemModel * model )
void	setRowCount (int rowCount )
void	setSeries (QXYSeries * series )
void	setXColumn (int xColumn )
void	setYColumn (int yColumn )
int	xColumn () const
int	yColumn () const

信号

void	firstRowChanged ()
void	modelReplaced ()
void	rowCountChanged ()
void	seriesReplaced ()
void	xColumnChanged ()
void	yColumnChanged ()

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 line, spline, or scatter series and the data model that has X and Y columns for the coordinates and holds the data points for the XYSeries as rows. A TableModel is a natural choice for the model.

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

另请参阅 QHXYModelMapper , QXYSeries ，和 模型数据范例 .

特性文档编制

firstRow : int

This property holds the row of the model that contains the data for the first point of the series.

最小且默认值为 0。

访问函数：

int	firstRow () const
void	setFirstRow (int firstRow )

通知程序信号：

void	firstRowChanged ()

model : QAbstractItemModel *

此特性保持映射器使用的模型。

访问函数：

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

通知程序信号：

void	modelReplaced ()

rowCount : int

This property holds the number of rows of the model that are mapped as the data for series.

The minimum and default value is -1 (the number is limited by the number of rows in the model).

访问函数：

int	rowCount () const
void	setRowCount (int rowCount )

通知程序信号：

void	rowCountChanged ()

series : QXYSeries *

This property holds the series that is used by the mapper.

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

访问函数：

QXYSeries *	series () const
void	setSeries (QXYSeries * series )

通知程序信号：

void	seriesReplaced ()

xColumn : int

This property holds the column of the model that contains the x-coordinates of data points.

默认值为 -1 (无效映射)。

访问函数：

int	xColumn () const
void	setXColumn (int xColumn )

通知程序信号：

void	xColumnChanged ()

yColumn : int

This property holds the column of the model that contains the y-coordinates of data points.

默认值为 -1 (无效映射)。

访问函数：

int	yColumn () const
void	setYColumn (int yColumn )

通知程序信号：

void	yColumnChanged ()

成员函数文档编制

QVXYModelMapper:: QVXYModelMapper ( QObject * parent = nullptr)

构造映射器对象为子级化 parent .

[signal] void QVXYModelMapper:: firstRowChanged ()

This signal is emitted when the first row changes.

注意： 通知程序信号对于特性 firstRow .

[signal] void QVXYModelMapper:: modelReplaced ()

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

注意： 通知程序信号对于特性 model .

[signal] void QVXYModelMapper:: rowCountChanged ()

This signal is emitted when the number of rows changes.

注意： 通知程序信号对于特性 rowCount .

[signal] void QVXYModelMapper:: seriesReplaced ()

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

注意： 通知程序信号对于特性 series .

[signal] void QVXYModelMapper:: xColumnChanged ()

This signal is emitted when the column that contains the x-coordinates of data points changes.

注意： 通知程序信号对于特性 xColumn .

[signal] void QVXYModelMapper:: yColumnChanged ()

This signal is emitted when the column that contains the y-coordinates of data points changes.

注意： 通知程序信号对于特性 yColumn .