QSurfaceDataProxy Class

The QSurfaceDataProxy class is the data proxy for a 3D surface graph. 更多...

头：	#include <QSurfaceDataProxy>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Graphs) target_link_libraries(mytarget PRIVATE Qt6::Graphs)
qmake:	QT += graphs
实例化：	SurfaceDataProxy
继承：	QAbstractDataProxy
继承者：	QHeightMapSurfaceDataProxy and QItemModelSurfaceDataProxy
状态：	技术预览

• 所有成员列表，包括继承成员
• QSurfaceDataProxy is part of Qt Graphs C++ Classes for 3D .

特性

• columnCount : const int
• rowCount : const int
• series : QSurface3DSeries* const

公共函数

	QSurfaceDataProxy (QObject * parent = nullptr)
virtual	~QSurfaceDataProxy () override
int	addRow (QSurfaceDataRow row )
int	addRows (QSurfaceDataArray rows )
const QSurfaceDataArray &	array () const
int	columnCount () const
void	insertRow (int rowIndex , QSurfaceDataRow row )
void	insertRows (int rowIndex , QSurfaceDataArray rows )
const QSurfaceDataItem &	itemAt (int rowIndex , int columnIndex ) const
const QSurfaceDataItem &	itemAt (const QPoint & position ) const
void	removeRows (int rowIndex , int removeCount )
void	resetArray ()
void	resetArray (QSurfaceDataArray newArray )
int	rowCount () const
QSurface3DSeries *	series () const
void	setItem (int rowIndex , int columnIndex , QSurfaceDataItem item )
void	setItem (const QPoint & position , QSurfaceDataItem item )
void	setRow (int rowIndex , QSurfaceDataRow row )
void	setRows (int rowIndex , QSurfaceDataArray rows )

信号

void	arrayReset ()
void	columnCountChanged (int count )
void	itemChanged (int rowIndex , int columnIndex )
void	rowCountChanged (int count )
void	rowsAdded (int startIndex , int count )
void	rowsChanged (int startIndex , int count )
void	rowsInserted (int startIndex , int count )
void	rowsRemoved (int startIndex , int count )
void	seriesChanged (QSurface3DSeries * series )

相关非成员

	QSurfaceDataArray
	QSurfaceDataRow

详细描述

A surface data proxy handles surface related data in rows. For this it provides two auxiliary type aliases: QtGraphs::QSurfaceDataArray and QtGraphs::QSurfaceDataRow. QSurfaceDataArray 是 QList that controls the rows. QSurfaceDataRow 是 QList that contains QSurfaceDataItem objects. For more information about how to feed the data to the proxy, see the sample code in the Q3DSurface 文档编制。

All rows must have the same number of items.

QSurfaceDataProxy takes ownership of all QSurfaceDataRow objects passed to it, whether directly or in a QSurfaceDataArray container. To use surface data row pointers to directly modify data after adding the array to the proxy, the appropriate signal must be emitted to update the graph.

To make a sensible surface, the x-value of each successive item in all rows must be either ascending or descending throughout the row. Similarly, the z-value of each successive item in all columns must be either ascending or descending throughout the column.

注意： Currently only surfaces with straight rows and columns are fully supported. Any row with items that do not have the exact same z-value or any column with items that do not have the exact same x-value may get clipped incorrectly if the whole surface does not completely fit within the visible x-axis or z-axis ranges.

注意： Surfaces with less than two rows or columns are not considered valid surfaces and will not be rendered.

注意： On some environments, surfaces with a lot of visible vertices may not render, because they exceed the per-draw vertex count supported by the graphics driver. This is mostly an issue on 32-bit and OpenGL ES2 platforms.

另请参阅 Qt Graphs Data Handling with 3D .

特性文档编制

[read-only] columnCount : const int

This property holds the number of columns in the data array.

访问函数：

int	columnCount () const

通知程序信号：

void	columnCountChanged (int count )

[read-only] rowCount : const int

This property holds the number of rows in the data array.

访问函数：

int	rowCount () const

通知程序信号：

void	rowCountChanged (int count )

[read-only] series : QSurface3DSeries * const

This property holds the series this proxy is attached to.

访问函数：

QSurface3DSeries *

series () const

通知程序信号：

void	seriesChanged (QSurface3DSeries * series )

成员函数文档编制

[explicit] QSurfaceDataProxy:: QSurfaceDataProxy ( QObject * parent = nullptr)

Constructs QSurfaceDataProxy with the given parent .

[override virtual noexcept] QSurfaceDataProxy:: ~QSurfaceDataProxy ()

Deletes the surface data proxy.

int QSurfaceDataProxy:: addRow ( QSurfaceDataRow row )

Adds the new row row to the end of an array. The new row must have the same number of columns as the rows in the initial array.

Returns the index of the added row.

int QSurfaceDataProxy:: addRows ( QSurfaceDataArray rows )

Adds new rows to the end of an array. The new rows must have the same number of columns as the rows in the initial array.

Returns the index of the first added row.

const QSurfaceDataArray &QSurfaceDataProxy:: array () const

Returns the pointer to the data array.

[signal] void QSurfaceDataProxy:: 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.

void QSurfaceDataProxy:: insertRow ( int rowIndex , QSurfaceDataRow row )

Inserts the new row row into rowIndex 。若 rowIndex is equal to the array size, the rows are added to the end of the array. The new row must have the same number of columns as the rows in the initial array.

void QSurfaceDataProxy:: insertRows ( int rowIndex , QSurfaceDataArray rows )

Inserts new rows into rowIndex 。若 rowIndex is equal to the array size, the rows are added to the end of the array. The new rows must have the same number of columns as the rows in the initial array.

const QSurfaceDataItem &QSurfaceDataProxy:: itemAt ( int rowIndex , int columnIndex ) const

Returns the pointer to the item at the position specified by rowIndex and columnIndex . It is guaranteed to be valid only until the next call that modifies data.

const QSurfaceDataItem &QSurfaceDataProxy:: itemAt (const QPoint & position ) const

Returns the pointer to the item at the position position . The x-value of position indicates the row and the y-value indicates the column. The item is guaranteed to be valid only until the next call that modifies data.

[signal] void QSurfaceDataProxy:: itemChanged ( int rowIndex , int columnIndex )

This signal is emitted when the item at the position specified by rowIndex and columnIndex changes. If the item is changed in the array without calling setItem (), this signal needs to be emitted to update the graph.

void QSurfaceDataProxy:: removeRows ( int rowIndex , int removeCount )

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

void QSurfaceDataProxy:: resetArray ()

Clears the existing array and triggers the arrayReset () 信号。

void QSurfaceDataProxy:: resetArray ( QSurfaceDataArray newArray )

* Sets the array from newArray . If the new array is equal to the * existing one, this function simply triggers the arrayReset () 信号。

[signal] void QSurfaceDataProxy:: rowsAdded ( int startIndex , int count )

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

[signal] void QSurfaceDataProxy:: rowsChanged ( int startIndex , int count )

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

[signal] void QSurfaceDataProxy:: rowsInserted ( int startIndex , int count )

This signal is emitted when the number of rows specified by count is inserted at the position startIndex .

If rows are inserted into the array without calling insertRow () 或 insertRows (), this signal needs to be emitted to update the graph.

[signal] void QSurfaceDataProxy:: rowsRemoved ( 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 is the current array size if the rows were removed from the end of the array. If rows are removed from the array without calling removeRows (), this signal needs to be emitted to update the graph.

void QSurfaceDataProxy:: setItem ( int rowIndex , int columnIndex , QSurfaceDataItem item )

Changes a single item at the position specified by rowIndex and columnIndex to the item item .

void QSurfaceDataProxy:: setItem (const QPoint & position , QSurfaceDataItem item )

Changes a single item at the position position to the item item . The x-value of position indicates the row and the y-value indicates the column.

void QSurfaceDataProxy:: setRow ( int rowIndex , QSurfaceDataRow row )

Changes an existing row by replacing the row at the position rowIndex with the new row specified by row . The new row can be the same as the existing row already stored at the rowIndex . The new row must have the same number of columns as the row it is replacing.

void QSurfaceDataProxy:: setRows ( int rowIndex , QSurfaceDataArray rows )

Changes existing rows by replacing the rows starting at the position rowIndex with the new rows specifies by rows . The rows in the rows array can be the same as the existing rows already stored at the rowIndex . The new rows must have the same number of columns as the rows they are replacing.

相关非成员

[alias] QSurfaceDataArray

A list of pointers to QSurfaceDataRow 对象。

[alias] QSurfaceDataRow

A list of QSurfaceDataItem 对象。

内容

• 特性

• 公共函数

• 信号

• 相关非成员

• 详细描述