QItemSelectionModel 类

QItemSelectionModel 类保持视图选中项的跟踪。更多...

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

所有成员列表，包括继承成员

公共类型

enum	SelectionFlag { NoUpdate, Clear, Select, Deselect, Toggle, …, ClearAndSelect }
flags	SelectionFlags

特性

selectedIndexes : const QModelIndexList

公共函数

	QItemSelectionModel (QAbstractItemModel * model = nullptr)
	QItemSelectionModel (QAbstractItemModel * model , QObject * parent )
virtual	~QItemSelectionModel ()
bool	columnIntersectsSelection (int column , const QModelIndex & parent = QModelIndex()) const
QModelIndex	currentIndex () const
bool	hasSelection () const
bool	isColumnSelected (int column , const QModelIndex & parent = QModelIndex()) const
bool	isRowSelected (int row , const QModelIndex & parent = QModelIndex()) const
bool	isSelected (const QModelIndex & index ) const
const QAbstractItemModel *	model () const
QAbstractItemModel *	model ()
bool	rowIntersectsSelection (int row , const QModelIndex & parent = QModelIndex()) const
QModelIndexList	selectedColumns (int row = 0) const
QModelIndexList	selectedIndexes () const
QModelIndexList	selectedRows (int column = 0) const
const QItemSelection	selection () const
void	setModel (QAbstractItemModel * model )

公共槽

virtual void	clear ()
virtual void	clearCurrentIndex ()
void	clearSelection ()
virtual void	reset ()
virtual void	select (const QModelIndex & index , QItemSelectionModel::SelectionFlags 命令 )
virtual void	select (const QItemSelection & selection , QItemSelectionModel::SelectionFlags 命令 )
virtual void	setCurrentIndex (const QModelIndex & index , QItemSelectionModel::SelectionFlags 命令 )

信号

void	currentChanged (const QModelIndex & current , const QModelIndex & previous )
void	currentColumnChanged (const QModelIndex & current , const QModelIndex & previous )
void	currentRowChanged (const QModelIndex & current , const QModelIndex & previous )
void	modelChanged (QAbstractItemModel * model )
void	selectionChanged (const QItemSelection & selected , const QItemSelection & deselected )

保护函数

void	emitSelectionChanged (const QItemSelection & newSelection , const QItemSelection & oldSelection )

详细描述

QItemSelectionModel 保持对视图或同一模型多个视图中的选中项的跟踪。它还保持对视图中当前选中项的跟踪。

QItemSelectionModel 类是一种模型/视图类且属于 Qt 的模型/视图框架 .

选中项使用范围存储。每当想要修改选中项时，使用 select () 和提供 QItemSelection ，或 QModelIndex 和 QItemSelectionModel::SelectionFlag .

QItemSelectionModel 采用 2 层方式进行选定管理，既处理已提交的选定项，也处理作为当前选定一部分的项。当前选中项是当前交互选定的一部分 (例如：采用橡皮筋选择或键盘 Shift 选择)。

要更新目前的选中项，使用按位 OR 的 QItemSelectionModel::Current 和任何其它 SelectionFlags 。若省略 QItemSelectionModel::Current 命令将创建新的当前选定，并将之前的添加到整个选定。所有函数运转于两者层；例如， selecteditems () will return items from both layers.

注意： 从 5.5 起， model , hasSelection ，和 currentIndex 是元对象特性。

另请参阅 模型/视图编程 , QAbstractItemModel ，和图表范例 .

成员类型文档编制

enum QItemSelectionModel:: SelectionFlag
flags QItemSelectionModel:: SelectionFlags

此枚举描述将更新选定模型的方式。

常量	值	描述
`QItemSelectionModel::NoUpdate`	`0x0000`	不会做出选择。
`QItemSelectionModel::Clear`	`0x0001`	完整选定将被清零。
`QItemSelectionModel::Select`	`0x0002`	所有指定索引将被选中。
`QItemSelectionModel::Deselect`	`0x0004`	所有指定索引将被取消选择。
`QItemSelectionModel::Toggle`	`0x0008`	所有指定索引将根据它们的当前状态被选中或取消选择。
`QItemSelectionModel::Current`	`0x0010`	当前选定将被更新。
`QItemSelectionModel::Rows`	`0x0020`	将扩展所有索引以跨行。
`QItemSelectionModel::Columns`	`0x0040`	将扩展所有索引以跨列。
`QItemSelectionModel::SelectCurrent`	`Select \| Current`	Select 和 Current 的组合，为方便起见提供。
`QItemSelectionModel::ToggleCurrent`	`Toggle \| Current`	Toggle 和 Current 的组合，为方便起见提供。
`QItemSelectionModel::ClearAndSelect`	`Clear \| Select`	Clear 和 Select 的组合，为方便起见提供。

SelectionFlags 类型是 typedef 对于 QFlags <SelectionFlag>。它存储 SelectionFlag 值的 OR 组合。

特性文档编制

`[read-only]` selectedIndexes : const QModelIndexList

访问函数：

QModelIndexList

selectedIndexes () const

通知程序信号：

void	selectionChanged (const QItemSelection & selected , const QItemSelection & deselected )

成员函数文档编制

`[explicit]` QItemSelectionModel:: QItemSelectionModel ( QAbstractItemModel * model = nullptr)

Constructs a selection model that operates on the specified item model .

`[explicit]` QItemSelectionModel:: QItemSelectionModel ( QAbstractItemModel * model , QObject * parent )

Constructs a selection model that operates on the specified item model with parent .

`[虚拟]` QItemSelectionModel:: ~QItemSelectionModel ()

销毁选定模型。

`[virtual slot]` void QItemSelectionModel:: clear ()

清零选定模型。发射 selectionChanged () 和 currentChanged ().

`[virtual slot]` void QItemSelectionModel:: clearCurrentIndex ()

清零当前索引。发射 currentChanged ().

`[slot]` void QItemSelectionModel:: clearSelection ()

Clears the selection in the selection model. Emits selectionChanged ().

`[invokable]` bool QItemSelectionModel:: columnIntersectsSelection ( int column , const QModelIndex & parent = QModelIndex()) const

返回 true 若有选中任何项在 column 采用给定 parent .

注意： 从 Qt 5.15 起，默认自变量对于 parent 是空模型索引。

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

`[signal]` void QItemSelectionModel:: currentChanged (const QModelIndex & current , const QModelIndex & previous )

此信号被发射每当当前项改变。 previous model item index is replaced by the current index as the selection's current item.

Note that this signal will not be emitted when the item model is reset.

另请参阅 currentIndex (), setCurrentIndex ()，和 selectionChanged ().

`[signal]` void QItemSelectionModel:: currentColumnChanged (const QModelIndex & current , const QModelIndex & previous )

此信号被发射，若 current item changes and its column is different to the column of the previous 当前项。

Note that this signal will not be emitted when the item model is reset.

另请参阅 currentChanged (), currentRowChanged (), currentIndex ()，和 setCurrentIndex ().

QModelIndex QItemSelectionModel:: currentIndex () const

Returns the model item index for the current item, or an invalid index if there is no current item.

另请参阅 setCurrentIndex ().

`[signal]` void QItemSelectionModel:: currentRowChanged (const QModelIndex & current , const QModelIndex & previous )

此信号被发射，若 current item changes and its row is different to the row of the previous 当前项。

Note that this signal will not be emitted when the item model is reset.

另请参阅 currentChanged (), currentColumnChanged (), currentIndex ()，和 setCurrentIndex ().

`[protected]` void QItemSelectionModel:: emitSelectionChanged (const QItemSelection & newSelection , const QItemSelection & oldSelection )

比较 2 选定 newSelection and oldSelection 并发射 selectionChanged () with the deselected and selected items.

bool QItemSelectionModel:: hasSelection () const

返回 true if the selection model contains any selected item, otherwise returns false .

`[invokable]` bool QItemSelectionModel:: isColumnSelected ( int column , const QModelIndex & parent = QModelIndex()) const

返回 true if all items are selected in the column 采用给定 parent .

Note that this function is usually faster than calling isSelected () on all items in the same column and that unselectable items are ignored.

注意： 从 Qt 5.15 起，默认自变量对于 parent 是空模型索引。

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

`[invokable]` bool QItemSelectionModel:: isRowSelected ( int row , const QModelIndex & parent = QModelIndex()) const

返回 true if all items are selected in the row 采用给定 parent .

Note that this function is usually faster than calling isSelected () on all items in the same row and that unselectable items are ignored.

注意： 从 Qt 5.15 起，默认自变量对于 parent 是空模型索引。

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

`[invokable]` bool QItemSelectionModel:: isSelected (const QModelIndex & index ) const

返回 true 若给定模型项 index 被选中。

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

const QAbstractItemModel *QItemSelectionModel:: model () const

返回由选定模型操作的项模型。

另请参阅 setModel ().

QAbstractItemModel *QItemSelectionModel:: model ()

返回由选定模型操作的项模型。

`[signal]` void QItemSelectionModel:: modelChanged ( QAbstractItemModel * model )

此信号被发射当 model is successfully set with setModel ().

另请参阅 model () 和 setModel ().

`[virtual slot]` void QItemSelectionModel:: reset ()

Clears the selection model. Does not emit any signals.

`[invokable]` bool QItemSelectionModel:: rowIntersectsSelection ( int row , const QModelIndex & parent = QModelIndex()) const

返回 true 若有选中任何项在 row 采用给定 parent .

注意： 从 Qt 5.15 起，默认自变量对于 parent 是空模型索引。

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

`[virtual slot]` void QItemSelectionModel:: select (const QModelIndex & index , QItemSelectionModel::SelectionFlags 命令 )

选择模型项 index 使用指定 command ，和发射 selectionChanged ().

另请参阅 QItemSelectionModel::SelectionFlags .

`[virtual slot]` void QItemSelectionModel:: select (const QItemSelection & selection , QItemSelectionModel::SelectionFlags 命令 )

选择项 selection 使用指定 command ，和发射 selectionChanged ().

另请参阅 QItemSelectionModel::SelectionFlag .

`[invokable]` QModelIndexList QItemSelectionModel:: selectedColumns ( int row = 0) const

返回的索引在给定 row 对于选中所有行的列而言。

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

另请参阅 selectedIndexes () 和 selectedRows ().

QModelIndexList QItemSelectionModel:: selectedIndexes () const

返回所有选中模型项索引的列表。列表包含的不重复，且未排序。

注意： getter 函数对于特性 selectedIndexes。

`[invokable]` QModelIndexList QItemSelectionModel:: selectedRows ( int column = 0) const

返回的索引在给定 column 对于选中所有列的行而言。

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

另请参阅 selectedIndexes () 和 selectedColumns ().

const QItemSelection QItemSelectionModel:: selection () const

返回存储在选定模型中的选定范围。

`[signal]` void QItemSelectionModel:: selectionChanged (const QItemSelection & selected , const QItemSelection & deselected )

This signal is emitted whenever the selection changes. The change in the selection is represented as an item selection of deselected items and an item selection of selected 项。

Note the that the current index changes independently from the selection. Also note that this signal will not be emitted when the item model is reset.

Items which stay selected but change their index are not included in selected and deselected . Thus, this signal might be emitted with both selected and deselected empty, if only the indices of selected items change.

注意： 通知程序信号对于特性 selectedIndexes .

另请参阅 select () 和 currentChanged ().

`[virtual slot]` void QItemSelectionModel:: setCurrentIndex (const QModelIndex & index , QItemSelectionModel::SelectionFlags 命令 )

Sets the model item index to be the current item, and emits currentChanged (). The current item is used for keyboard navigation and focus indication; it is independent of any selected items, although a selected item can also be the current item.

从属指定 command ， index 也可以变为当前选定的一部分。

另请参阅 currentIndex () 和 select ().

void QItemSelectionModel:: setModel ( QAbstractItemModel * model )

将模型设为 model 。 modelChanged () 信号会被发射。

另请参阅 model () 和 modelChanged ().

QItemSelectionModel 类

公共类型

特性

公共函数

公共槽

信号

保护函数

详细描述

成员类型文档编制

enum QItemSelectionModel:: SelectionFlag flags QItemSelectionModel:: SelectionFlags

特性文档编制

[read-only] selectedIndexes : const QModelIndexList

成员函数文档编制

[explicit] QItemSelectionModel:: QItemSelectionModel ( QAbstractItemModel * model = nullptr)

[explicit] QItemSelectionModel:: QItemSelectionModel ( QAbstractItemModel * model , QObject * parent )

[虚拟] QItemSelectionModel:: ~QItemSelectionModel ()

[virtual slot] void QItemSelectionModel:: clear ()

[virtual slot] void QItemSelectionModel:: clearCurrentIndex ()

[slot] void QItemSelectionModel:: clearSelection ()

[invokable] bool QItemSelectionModel:: columnIntersectsSelection ( int column , const QModelIndex & parent = QModelIndex()) const

[signal] void QItemSelectionModel:: currentChanged (const QModelIndex & current , const QModelIndex & previous )

[signal] void QItemSelectionModel:: currentColumnChanged (const QModelIndex & current , const QModelIndex & previous )

QModelIndex QItemSelectionModel:: currentIndex () const

[signal] void QItemSelectionModel:: currentRowChanged (const QModelIndex & current , const QModelIndex & previous )

[protected] void QItemSelectionModel:: emitSelectionChanged (const QItemSelection & newSelection , const QItemSelection & oldSelection )

bool QItemSelectionModel:: hasSelection () const

[invokable] bool QItemSelectionModel:: isColumnSelected ( int column , const QModelIndex & parent = QModelIndex()) const

[invokable] bool QItemSelectionModel:: isRowSelected ( int row , const QModelIndex & parent = QModelIndex()) const

[invokable] bool QItemSelectionModel:: isSelected (const QModelIndex & index ) const

const QAbstractItemModel *QItemSelectionModel:: model () const

QAbstractItemModel *QItemSelectionModel:: model ()

[signal] void QItemSelectionModel:: modelChanged ( QAbstractItemModel * model )

[virtual slot] void QItemSelectionModel:: reset ()

[invokable] bool QItemSelectionModel:: rowIntersectsSelection ( int row , const QModelIndex & parent = QModelIndex()) const

[virtual slot] void QItemSelectionModel:: select (const QModelIndex & index , QItemSelectionModel::SelectionFlags 命令 )

[virtual slot] void QItemSelectionModel:: select (const QItemSelection & selection , QItemSelectionModel::SelectionFlags 命令 )

[invokable] QModelIndexList QItemSelectionModel:: selectedColumns ( int row = 0) const

QModelIndexList QItemSelectionModel:: selectedIndexes () const

[invokable] QModelIndexList QItemSelectionModel:: selectedRows ( int column = 0) const

const QItemSelection QItemSelectionModel:: selection () const

[signal] void QItemSelectionModel:: selectionChanged (const QItemSelection & selected , const QItemSelection & deselected )

[virtual slot] void QItemSelectionModel:: setCurrentIndex (const QModelIndex & index , QItemSelectionModel::SelectionFlags 命令 )

void QItemSelectionModel:: setModel ( QAbstractItemModel * model )

内容

enum QItemSelectionModel:: SelectionFlag
flags QItemSelectionModel:: SelectionFlags

`[read-only]` selectedIndexes : const QModelIndexList

`[explicit]` QItemSelectionModel:: QItemSelectionModel ( QAbstractItemModel * model = nullptr)

`[explicit]` QItemSelectionModel:: QItemSelectionModel ( QAbstractItemModel * model , QObject * parent )

`[虚拟]` QItemSelectionModel:: ~QItemSelectionModel ()

`[virtual slot]` void QItemSelectionModel:: clear ()

`[virtual slot]` void QItemSelectionModel:: clearCurrentIndex ()

`[slot]` void QItemSelectionModel:: clearSelection ()

`[invokable]` bool QItemSelectionModel:: columnIntersectsSelection ( int column , const QModelIndex & parent = QModelIndex()) const

`[signal]` void QItemSelectionModel:: currentChanged (const QModelIndex & current , const QModelIndex & previous )

`[signal]` void QItemSelectionModel:: currentColumnChanged (const QModelIndex & current , const QModelIndex & previous )

`[signal]` void QItemSelectionModel:: currentRowChanged (const QModelIndex & current , const QModelIndex & previous )

`[protected]` void QItemSelectionModel:: emitSelectionChanged (const QItemSelection & newSelection , const QItemSelection & oldSelection )

`[invokable]` bool QItemSelectionModel:: isColumnSelected ( int column , const QModelIndex & parent = QModelIndex()) const

`[invokable]` bool QItemSelectionModel:: isRowSelected ( int row , const QModelIndex & parent = QModelIndex()) const

`[invokable]` bool QItemSelectionModel:: isSelected (const QModelIndex & index ) const

`[signal]` void QItemSelectionModel:: modelChanged ( QAbstractItemModel * model )

`[virtual slot]` void QItemSelectionModel:: reset ()

`[invokable]` bool QItemSelectionModel:: rowIntersectsSelection ( int row , const QModelIndex & parent = QModelIndex()) const

`[virtual slot]` void QItemSelectionModel:: select (const QModelIndex & index , QItemSelectionModel::SelectionFlags 命令 )

`[virtual slot]` void QItemSelectionModel:: select (const QItemSelection & selection , QItemSelectionModel::SelectionFlags 命令 )

`[invokable]` QModelIndexList QItemSelectionModel:: selectedColumns ( int row = 0) const

`[invokable]` QModelIndexList QItemSelectionModel:: selectedRows ( int column = 0) const

`[signal]` void QItemSelectionModel:: selectionChanged (const QItemSelection & selected , const QItemSelection & deselected )

`[virtual slot]` void QItemSelectionModel:: setCurrentIndex (const QModelIndex & index , QItemSelectionModel::SelectionFlags 命令 )