内容

• 特性
• 公共函数
• 信号
• 详细描述

QHXYModelMapper 类

QHXYModelMapper class 是用于直线、样条线及散点系列的水平模型映射器。 更多...

头：	#include <QHXYModelMapper>
实例化：	HXYModelMapper
继承：	QXYModelMapper

• 所有成员列表，包括继承成员

特性

columnCount : int firstColumn : int model : QAbstractItemModel*

series : QXYSeries* xRow : int yRow : int

公共函数

	QHXYModelMapper (QObject * parent = nullptr)
int	columnCount () const
int	firstColumn () const
QAbstractItemModel *	model () const
QXYSeries *	series () const
void	setColumnCount (int columnCount )
void	setFirstColumn (int firstColumn )
void	setModel (QAbstractItemModel * model )
void	setSeries (QXYSeries * series )
void	setXRow (int xRow )
void	setYRow (int yRow )
int	xRow () const
int	yRow () const

信号

void	columnCountChanged ()
void	firstColumnChanged ()
void	modelReplaced ()
void	seriesReplaced ()
void	xRowChanged ()
void	yRowChanged ()

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 horizontal model mapper is used to create a connection between a line, spline, or scatter series and the data model that has X and Y rows for the coordinates and holds the data points for the XYSeries as columns. 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 QVXYModelMapper , QXYSeries ，和 模型数据范例 .

特性文档编制

columnCount : int

This property holds the number of columns 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 columns in the model).

访问函数：

int	columnCount () const
void	setColumnCount (int columnCount )

通知程序信号：

void	columnCountChanged ()

firstColumn : int

This property holds the column 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	firstColumn () const
void	setFirstColumn (int firstColumn )

通知程序信号：

void	firstColumnChanged ()

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 ()

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 ()

xRow : int

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

默认值为 -1 (无效映射)。

访问函数：

int	xRow () const
void	setXRow (int xRow )

通知程序信号：

void	xRowChanged ()

yRow : int

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

默认值为 -1 (无效映射)。

访问函数：

int	yRow () const
void	setYRow (int yRow )

通知程序信号：

void	yRowChanged ()

成员函数文档编制

QHXYModelMapper:: QHXYModelMapper ( QObject * parent = nullptr)

构造映射器对象为子级化 parent .

[signal] void QHXYModelMapper:: columnCountChanged ()

This signal is emitted when the number of columns changes.

注意： 通知程序信号对于特性 columnCount .

[signal] void QHXYModelMapper:: firstColumnChanged ()

This signal is emitted when the first column changes.

注意： 通知程序信号对于特性 firstColumn .

[signal] void QHXYModelMapper:: 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 QHXYModelMapper:: 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 QHXYModelMapper:: xRowChanged ()

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

注意： 通知程序信号对于特性 xRow .

[signal] void QHXYModelMapper:: yRowChanged ()

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

注意： 通知程序信号对于特性 yRow .