内容

• 公共函数
• 详细描述

QItemSelectionRange 类

QItemSelectionRange 类管理模型选中项范围的有关信息。 更多...

头：	#include <QItemSelectionRange>
CMake:	find_package(Qt6 COMPONENTS Core REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::Core)
qmake:	QT += core

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公共函数

	QItemSelectionRange (const QModelIndex & index )
	QItemSelectionRange (const QModelIndex & topLeft , const QModelIndex & bottomRight )
	QItemSelectionRange ()
int	bottom () const
const QPersistentModelIndex &	bottomRight () const
bool	contains (const QModelIndex & index ) const
bool	contains (int row , int column , const QModelIndex & parentIndex ) const
int	height () const
QModelIndexList	indexes () const
QItemSelectionRange	intersected (const QItemSelectionRange & other ) const
bool	intersects (const QItemSelectionRange & other ) const
bool	isEmpty () const
bool	isValid () const
int	left () const
const QAbstractItemModel *	model () const
QModelIndex	parent () const
int	right () const
void	swap (QItemSelectionRange & other )
int	top () const
const QPersistentModelIndex &	topLeft () const
int	width () const
bool	operator!= (const QItemSelectionRange & other ) const
bool	operator== (const QItemSelectionRange & other ) const

详细描述

A QItemSelectionRange contains information about a range of selected items in a model. A range of items is a contiguous array of model items, extending to cover a number of adjacent rows and columns with a common parent item; this can be visualized as a two-dimensional block of cells in a table. A selection range has a top (), left () bottom (), right () 和 parent ().

The QItemSelectionRange class is one of the 模型/视图类 且属于 Qt 的 模型/视图框架 .

The model items contained in the selection range can be obtained using the indexes () function. Use QItemSelectionModel::selectedIndexes () to get a list of all selected items for a view.

You can determine whether a given model item lies within a particular range by using the contains () function. Ranges can also be compared using the overloaded operators for equality and inequality, and the intersects () function allows you to determine whether two ranges overlap.

另请参阅 模型/视图编程 , QAbstractItemModel , QItemSelection ，和 QItemSelectionModel .

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QItemSelectionRange:: QItemSelectionRange (const QModelIndex & index )

Constructs a new selection range containing only the model item specified by the model index index .

QItemSelectionRange:: QItemSelectionRange (const QModelIndex & topLeft , const QModelIndex & bottomRight )

Constructs a new selection range containing only the index specified by the topLeft and the index bottomRight .

QItemSelectionRange:: QItemSelectionRange ()

Constructs an empty selection range.

int QItemSelectionRange:: bottom () const

Returns the row index corresponding to the lowermost selected row in the selection range.

const QPersistentModelIndex &QItemSelectionRange:: bottomRight () const

Returns the index for the item located at the bottom-right corner of the selection range.

另请参阅 bottom (), right ()，和 topLeft ().

bool QItemSelectionRange:: contains (const QModelIndex & index ) const

返回 true if the model item specified by the index lies within the range of selected items; otherwise returns false .

bool QItemSelectionRange:: contains ( int row , int column , const QModelIndex & parentIndex ) const

这是重载函数。

返回 true if the model item specified by ( row , column ) and with parentIndex as the parent item lies within the range of selected items; otherwise returns false .

int QItemSelectionRange:: height () const

Returns the number of selected rows in the selection range.

QModelIndexList QItemSelectionRange:: indexes () const

Returns the list of model index items stored in the selection.

QItemSelectionRange QItemSelectionRange:: intersected (const QItemSelectionRange & other ) const

Returns a new selection range containing only the items that are found in both the selection range and the other selection range.

bool QItemSelectionRange:: intersects (const QItemSelectionRange & other ) const

返回 true if this selection range intersects (overlaps with) the other range given; otherwise returns false .

bool QItemSelectionRange:: isEmpty () const

返回 true if the selection range contains either no items or only items which are either disabled or marked as not selectable.

bool QItemSelectionRange:: isValid () const

返回 true if the selection range is valid; otherwise returns false .

int QItemSelectionRange:: left () const

Returns the column index corresponding to the leftmost selected column in the selection range.

const QAbstractItemModel *QItemSelectionRange:: model () const

Returns the model that the items in the selection range belong to.

QModelIndex QItemSelectionRange:: parent () const

Returns the parent model item index of the items in the selection range.

int QItemSelectionRange:: right () const

Returns the column index corresponding to the rightmost selected column in the selection range.

[since 5.6] void QItemSelectionRange:: swap ( QItemSelectionRange & other )

Swaps this selection range's contents with other 。此函数非常快且从不失败。

该函数在 Qt 5.6 引入。

int QItemSelectionRange:: top () const

Returns the row index corresponding to the uppermost selected row in the selection range.

const QPersistentModelIndex &QItemSelectionRange:: topLeft () const

Returns the index for the item located at the top-left corner of the selection range.

另请参阅 top (), left ()，和 bottomRight ().

int QItemSelectionRange:: width () const

Returns the number of selected columns in the selection range.

bool QItemSelectionRange:: operator!= (const QItemSelectionRange & other ) const

返回 true if the selection range differs from the other range given; otherwise returns false .

bool QItemSelectionRange:: operator== (const QItemSelectionRange & other ) const

返回 true if the selection range is exactly the same as the other range given; otherwise returns false .