QAbstractItemModelReplica 類

The QAbstractItemModelReplica class serves as a convenience class for Replicas of Sources based on QAbstractItemModel . 更多...

頭：	#include <QAbstractItemModelReplica>
CMake:	find_package(Qt6 REQUIRED COMPONENTS RemoteObjects) target_link_libraries(mytarget PRIVATE Qt6::RemoteObjects)
qmake:	QT += remoteobjects
繼承：	QAbstractItemModel

• 所有成員列錶，包括繼承成員

公共函數

virtual	~QAbstractItemModelReplica () override
QList<int>	availableRoles () const
bool	hasData (const QModelIndex & index , int role ) const
bool	isInitialized () const
size_t	rootCacheSize () const
QItemSelectionModel *	selectionModel () const
void	setRootCacheSize (size_t rootCacheSize )

重實現公共函數

virtual int	columnCount (const QModelIndex & parent = QModelIndex()) const override
virtual QVariant	data (const QModelIndex & index , int role = Qt::DisplayRole) const override
virtual Qt::ItemFlags	flags (const QModelIndex & index ) const override
virtual bool	hasChildren (const QModelIndex & parent = QModelIndex()) const override
virtual QVariant	headerData (int section , Qt::Orientation orientation , int role ) const override
virtual QModelIndex	index (int row , int column , const QModelIndex & parent = QModelIndex()) const override
virtual void	multiData (const QModelIndex & index , QModelRoleDataSpan roleDataSpan ) const override
virtual QModelIndex	parent (const QModelIndex & index ) const override
virtual QHash<int, QByteArray>	roleNames () const override
virtual int	rowCount (const QModelIndex & parent = QModelIndex()) const override
virtual bool	setData (const QModelIndex & index , const QVariant & value , int role = Qt::EditRole) override

信號

void	initialized ()

詳細描述

QAbstractItemModelReplica makes replicating QAbstractItemModels more efficient by employing caching and pre-fetching.

另請參閱 QAbstractItemModel .

成員函數文檔編製

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

銷毀實例化的 QAbstractItemModelReplica .

QList < int > QAbstractItemModelReplica:: availableRoles () const

返迴可用角色的列錶。

另請參閱 QAbstractItemModel .

[override virtual] int QAbstractItemModelReplica:: columnCount (const QModelIndex & parent = QModelIndex()) const

重實現： QAbstractItemModel::columnCount (const QModelIndex &parent) const.

[override virtual] QVariant QAbstractItemModelReplica:: data (const QModelIndex & index , int role = Qt::DisplayRole) const

重實現： QAbstractItemModel::data (const QModelIndex &index, int role) const.

返迴 role 數據為項在 index if available in cache. A default-constructed QVariant is returned if the index is invalid, the role is not one of the available roles, the 復本 is uninitialized or the data was not available. If the data was not available in cache it will be requested from the 源 .

另請參閱 QAbstractItemModel::data (), hasData (), setData ()，和 isInitialized ().

[override virtual] Qt::ItemFlags QAbstractItemModelReplica:: flags (const QModelIndex & index ) const

重實現： QAbstractItemModel::flags (const QModelIndex &index) const.

[override virtual] bool QAbstractItemModelReplica:: hasChildren (const QModelIndex & parent = QModelIndex()) const

重實現： QAbstractItemModel::hasChildren (const QModelIndex &parent) const.

bool QAbstractItemModelReplica:: hasData (const QModelIndex & index , int role ) const

返迴 true 若那裏存在 role 數據為項在 index 。返迴 false 在任何其它情況下。

[override virtual] QVariant QAbstractItemModelReplica:: headerData ( int section , Qt::Orientation orientation , int role ) const

重實現： QAbstractItemModel::headerData (int section, Qt::Orientation orientation, int role) const.

返迴數據為給定 role and section 在 Header (頭) 采用指定 orientation .

若數據不可用，將請求它從 源 .

另請參閱 QAbstractItemModel::headerData ().

[override virtual] QModelIndex QAbstractItemModelReplica:: index ( int row , int column , const QModelIndex & parent = QModelIndex()) const

重實現： QAbstractItemModel::index (int row, int column, const QModelIndex &parent) const.

[signal] void QAbstractItemModelReplica:: initialized ()

The initialized signal is emitted the first time we receive data from the 源 .

另請參閱 isInitialized ().

bool QAbstractItemModelReplica:: isInitialized () const

返迴 true 若此復本已初始化采用數據來自 源 對象。返迴 false 否則。

另請參閱 initialized ().

[override virtual] void QAbstractItemModelReplica:: multiData (const QModelIndex & index , QModelRoleDataSpan roleDataSpan ) const

重實現： QAbstractItemModel::multiData (const QModelIndex &index, QModelRoleDataSpan roleDataSpan) const.

[override virtual] QModelIndex QAbstractItemModelReplica:: parent (const QModelIndex & index ) const

重實現： QAbstractItemModel::parent (const QModelIndex &index) const.

[override virtual] QHash < int , QByteArray > QAbstractItemModelReplica:: roleNames () const

重實現： QAbstractItemModel::roleNames () const.

size_t QAbstractItemModelReplica:: rootCacheSize () const

Returns the current size of the internal cache. By default this is set to the value of the QTRO_NODES_CACHE_SIZE environment variable, or a default of 1000 if it is invalid or doesn't exist.

另請參閱 setRootCacheSize ().

[override virtual] int QAbstractItemModelReplica:: rowCount (const QModelIndex & parent = QModelIndex()) const

重實現： QAbstractItemModel::rowCount (const QModelIndex &parent) const.

QItemSelectionModel *QAbstractItemModelReplica:: selectionModel () const

返迴指針指嚮 QItemSelectionModel 對於當前 QAbstractItemModelReplica .

[override virtual] bool QAbstractItemModelReplica:: setData (const QModelIndex & index , const QVariant & value , int role = Qt::EditRole)

重實現： QAbstractItemModel::setData (const QModelIndex &index, const QVariant &value, int role).

另請參閱 data ().

void QAbstractItemModelReplica:: setRootCacheSize ( size_t rootCacheSize )

把內部緩存大小設為 rootCacheSize .

另請參閱 rootCacheSize ().

內容

1. 公共函數

2. 重實現公共函數

3. 信號

4. 詳細描述