QScatterDataProxy Class

The QScatterDataProxy class is the data proxy for 3D scatter graphs. 更多...

头：	#include <QScatterDataProxy>
qmake:	QT += datavisualization
Since:	QtDataVisualization 1.0
实例化：	ScatterDataProxy
继承：	QAbstractDataProxy
继承者：	QItemModelScatterDataProxy

该类在 QtDataVisualization 1.0 引入。

• 所有成员列表，包括继承成员

特性

• itemCount : const int
• series : QScatter3DSeries* const

公共函数

	QScatterDataProxy (QObject * parent = nullptr)
virtual	~QScatterDataProxy ()
int	addItem (const QScatterDataItem & item )
int	addItems (const QScatterDataArray & 项 )
const QScatterDataArray *	array () const
void	insertItem (int index , const QScatterDataItem & item )
void	insertItems (int index , const QScatterDataArray & 项 )
const QScatterDataItem *	itemAt (int index ) const
int	itemCount () const
void	removeItems (int index , int removeCount )
void	resetArray (QScatterDataArray * newArray )
QScatter3DSeries *	series () const
void	setItem (int index , const QScatterDataItem & item )
void	setItems (int index , const QScatterDataArray & 项 )

信号

void	arrayReset ()
void	itemCountChanged (int count )
void	itemsAdded (int startIndex , int count )
void	itemsChanged (int startIndex , int count )
void	itemsInserted (int startIndex , int count )
void	itemsRemoved (int startIndex , int count )
void	seriesChanged (QScatter3DSeries * series )

相关非成员

typedef

QScatterDataArray

详细描述

A scatter data proxy handles adding, inserting, changing, and removing data items.

QScatterDataProxy takes ownership of all QtDataVisualization::QScatterDataArray and QScatterDataItem objects passed to it.

另请参阅 Qt Data Visualization 数据处理 .

特性文档编制

itemCount : const int

This property holds the number of items in the array.

访问函数：

int	itemCount () const

通知程序信号：

void	itemCountChanged (int count )

series : QScatter3DSeries * const

This property holds the series this proxy is attached to.

访问函数：

QScatter3DSeries *

series () const

通知程序信号：

void	seriesChanged (QScatter3DSeries * series )

成员函数文档编制

QScatterDataProxy:: QScatterDataProxy ( QObject * parent = nullptr)

Constructs QScatterDataProxy with the given parent .

[signal] void QScatterDataProxy:: arrayReset ()

This signal is emitted when the data array is reset. If the contents of the whole array are changed without calling resetArray (), this signal needs to be emitted to update the graph.

[signal] void QScatterDataProxy:: itemsAdded ( int startIndex , int count )

This signal is emitted when the number of items specified by count is added starting at the position startIndex . If items are added to the array without calling addItem () 或 addItems (), this signal needs to be emitted to update the graph.

[signal] void QScatterDataProxy:: itemsChanged ( int startIndex , int count )

This signal is emitted when the number of items specified by count is changed starting at the position startIndex . If items are changed in the array without calling setItem () 或 setItems (), this signal needs to be emitted to update the graph.

[signal] void QScatterDataProxy:: itemsInserted ( int startIndex , int count )

This signal is emitted when the number of items specified by count is inserted starting at the position startIndex . If items are inserted into the array without calling insertItem () 或 insertItems (), this signal needs to be emitted to update the graph.

[signal] void QScatterDataProxy:: itemsRemoved ( int startIndex , int count )

This signal is emitted when the number of rows specified by count is removed starting at the position startIndex . The index may be larger than the current array size if items are removed from the end. If items are removed from the array without calling removeItems (), this signal needs to be emitted to update the graph.

[虚拟] QScatterDataProxy:: ~QScatterDataProxy ()

Deletes the scatter data proxy.

int QScatterDataProxy:: addItem (const QScatterDataItem & item )

Adds the item item to the end of the array.

Returns the index of the added item.

int QScatterDataProxy:: addItems (const QScatterDataArray & 项 )

Adds the items specified by 项 to the end of the array.

Returns the index of the first added item.

const QScatterDataArray *QScatterDataProxy:: array () const

Returns the pointer to the data array.

void QScatterDataProxy:: insertItem ( int index , const QScatterDataItem & item )

Inserts the item item to the position index . If the index is equal to the data array size, the item is added to the array.

void QScatterDataProxy:: insertItems ( int index , const QScatterDataArray & 项 )

Inserts the items specified by 项 to the position index . If the index is equal to data array size, the items are added to the array.

const QScatterDataItem *QScatterDataProxy:: itemAt ( int index ) const

Returns the pointer to the item at the index index . It is guaranteed to be valid only until the next call that modifies data.

void QScatterDataProxy:: removeItems ( int index , int removeCount )

Removes the number of items specified by removeCount starting at the position index . Attempting to remove items past the end of the array does nothing.

void QScatterDataProxy:: resetArray ( QScatterDataArray * newArray )

Takes ownership of the array newArray . Clears the existing array if the new array differs from it. If the arrays are the same, this function just triggers the arrayReset () 信号。

Passing a null array deletes the old array and creates a new empty array.

void QScatterDataProxy:: setItem ( int index , const QScatterDataItem & item )

Replaces the item at the position index with the item item .

void QScatterDataProxy:: setItems ( int index , const QScatterDataArray & 项 )

Replaces the items starting from the position index with the items specified by 项 .

相关非成员

typedef QScatterDataArray

A vector of QScatterDataItem 对象。

内容

• 特性

• 公共函数

• 信号

• 相关非成员

• 详细描述