QPieModelMapper Class

The QPieModelMapper is a model mapper for pie series. 更多...

头：	#include <QPieModelMapper>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Graphs) target_link_libraries(mytarget PRIVATE Qt6::Graphs)
qmake:	QT += graphs
在 QML：	PieModelMapper
继承：	QObject

• 所有成员列表，包括继承成员
• QPieModelMapper is part of Qt Graphs C++ Classes for 2D .

特性

count : qsizetype first : qsizetype labelsSection : qsizetype model : QAbstractItemModel*

orientation : Qt::Orientation series : QPieSeries* valuesSection : qsizetype

公共函数

qsizetype	count () const
qsizetype	first () const
qsizetype	labelsSection () const
QAbstractItemModel *	model () const
Qt::Orientation	orientation () const
QPieSeries *	series () const
void	setCount (qsizetype count )
void	setFirst (qsizetype first )
void	setLabelsSection (qsizetype labelsSection )
void	setModel (QAbstractItemModel * model )
void	setOrientation (Qt::Orientation orientation )
void	setSeries (QPieSeries * series )
void	setValuesSection (qsizetype valuesSection )
qsizetype	valuesSection () const

信号

void	countChanged ()
void	firstChanged ()
void	labelsSectionChanged ()
void	modelChanged ()
void	orientationChanged ()
void	seriesChanged ()
void	valuesSectionChanged ()

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 graph. A model mapper is used to create a connection between a data model and QPieSeries .

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

特性文档编制

count : qsizetype

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

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

访问函数：

qsizetype	count () const
void	setCount (qsizetype count )

通知程序信号：

void	countChanged ()

另请参阅 QPieModelMapper::orientation .

first : qsizetype

This property holds the column or row of the model that contains the first slice value.

最小且默认值为 0。

访问函数：

qsizetype	第一 () const
void	setFirst (qsizetype first )

通知程序信号：

void	firstChanged ()

另请参阅 QPieModelMapper::orientation .

labelsSection : qsizetype

This property holds the column or row of the model that is kept in sync with the labels of the pie's slices.

默认值为 -1 (无效映射)。

访问函数：

qsizetype	labelsSection () const
void	setLabelsSection (qsizetype labelsSection )

通知程序信号：

void	labelsSectionChanged ()

另请参阅 QPieModelMapper::orientation .

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	modelChanged ()

orientation : Qt::Orientation

Tells the modelmapper how to map data from a model. If Qt::Vertical is used, each of the model's rows defines a pie slice, and the model's columns define the label or the value of the pie slice. When the orientation is set to Qt::Horizontal , each of the model's columns defines a pie slice, and the model's rows define the label or the value of the pie slice.

默认值为 Qt::Vertical

访问函数：

Qt::Orientation	orientation () const
void	setOrientation (Qt::Orientation orientation )

通知程序信号：

void	orientationChanged ()

series : QPieSeries *

This property holds the pie 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：

QPieSeries *	series () const
void	setSeries (QPieSeries * series )

通知程序信号：

void	seriesChanged ()

valuesSection : qsizetype

This property holds the column or row of the model that is kept in sync with the values of the pie's slices.

默认值为 -1 (无效映射)。

访问函数：

qsizetype	valuesSection () const
void	setValuesSection (qsizetype valuesSection )

通知程序信号：

void	valuesSectionChanged ()

另请参阅 QPieModelMapper::orientation .

内容

1. 特性

2. 公共函数

3. 信号

4. 详细描述