QDirModel Class

The QDirModel class provides a data model for the local filesystem. 更多...

头：	#include <QDirModel>
qmake:	QT += widgets
继承：	QAbstractItemModel

该类已过时。 提供它是为使旧源代码能继续工作。强烈建议不要在新代码中使用它。

所有成员列表，包括继承成员

公共类型

enum	Roles { FileIconRole, FilePathRole, FileNameRole }

特性

lazyChildCount : bool
readOnly : bool
resolveSymlinks : bool

公共函数

	QDirModel (QObject * parent = nullptr)
	QDirModel (const QStringList & nameFilters , QDir::Filters filters , QDir::SortFlags sort , QObject * parent = nullptr)
virtual	~QDirModel ()
QIcon	fileIcon (const QModelIndex & index ) const
QFileInfo	fileInfo (const QModelIndex & index ) const
QString	fileName (const QModelIndex & index ) const
QString	filePath (const QModelIndex & index ) const
QDir::Filters	filter () const
QFileIconProvider *	iconProvider () const
QModelIndex	index (const QString & path , int column = 0) const
bool	isDir (const QModelIndex & index ) const
bool	isReadOnly () const
bool	lazyChildCount () const
QModelIndex	mkdir (const QModelIndex & parent , const QString & name )
QStringList	nameFilters () const
bool	remove (const QModelIndex & index )
bool	resolveSymlinks () const
bool	rmdir (const QModelIndex & index )
void	setFilter (QDir::Filters filters )
void	setIconProvider (QFileIconProvider * provider )
void	setLazyChildCount (bool enable )
void	setNameFilters (const QStringList & filters )
void	setReadOnly (bool enable )
void	setResolveSymlinks (bool enable )
void	setSorting (QDir::SortFlags sort )
QDir::SortFlags	sorting () const

重实现公共函数

virtual int	columnCount (const QModelIndex & parent = QModelIndex()) const override
virtual QVariant	data (const QModelIndex & index , int role = Qt::DisplayRole) const override
virtual bool	dropMimeData (const QMimeData * data , Qt::DropAction action , int row , int column , const QModelIndex & parent ) 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 = Qt::DisplayRole) const override
virtual QModelIndex	index (int row , int column , const QModelIndex & parent = QModelIndex()) const override
virtual QMimeData *	mimeData (const QModelIndexList & indexes ) const override
virtual QStringList	mimeTypes () const override
virtual QModelIndex	parent (const QModelIndex & child ) 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
virtual void	sort (int column , Qt::SortOrder order = Qt::AscendingOrder) override
virtual Qt::DropActions	supportedDropActions () const override

公共槽

void	refresh (const QModelIndex & parent = QModelIndex())

详细描述

The usage of QDirModel is not recommended anymore. The QFileSystemModel class is a more performant alternative.

This class provides access to the local filesystem, providing functions for renaming and removing files and directories, and for creating new directories. In the simplest case, it can be used with a suitable display widget as part of a browser or filer.

QDirModel keeps a cache with file information. The cache needs to be updated with refresh ().

QDirModel can be accessed using the standard interface provided by QAbstractItemModel , but it also provides some convenience functions that are specific to a directory model. The fileInfo () 和 isDir () functions provide information about the underlying files and directories related to items in the model.

Directories can be created and removed using mkdir (), rmdir (), and the model will be automatically updated to take the changes into account.

注意： QDirModel requires an instance of QApplication .

另请参阅 nameFilters (), setFilter (), filter (), QListView , QTreeView , QFileSystemModel , 目录视图范例，和模型类 .

成员类型文档编制

enum QDirModel:: Roles

常量	值
`QDirModel::FileIconRole`	`Qt::DecorationRole`
`QDirModel::FilePathRole`	`Qt::UserRole + 1`
`QDirModel::FileNameRole`	`258`

特性文档编制

lazyChildCount : bool

This property holds whether the directory model optimizes the hasChildren function to only check if the item is a directory.

If this property is set to false, the directory model will make sure that a directory actually containes any files before reporting that it has children. Otherwise the directory model will report that an item has children if the item is a directory.

此特性是 false 默认情况下

访问函数：

bool	lazyChildCount () const
void	setLazyChildCount (bool enable )

readOnly : bool

This property holds whether the directory model allows writing to the file system

If this property is set to false, the directory model will allow renaming, copying and deleting of files and directories.

此特性是 true 默认情况下

访问函数：

bool	isReadOnly () const
void	setReadOnly (bool enable )

resolveSymlinks : bool

此特性保持目录模型是否应解析符号链接

This is only relevant on operating systems that support symbolic links.

访问函数：

bool	resolveSymlinks () const
void	setResolveSymlinks (bool enable )

成员函数文档编制

QDirModel:: QDirModel ( QObject * parent = nullptr)

Constructs a directory model with the given parent .

QDirModel:: QDirModel (const QStringList & nameFilters , QDir::Filters filters , QDir::SortFlags sort , QObject * parent = nullptr)

Constructs a new directory model with the given parent . Only those files matching the nameFilters 和 filters are included in the model. The sort order is given by the sort flags.

`[slot]` void QDirModel:: refresh (const QModelIndex & parent = QModelIndex())

QDirModel caches file information. This function updates the cache. The parent parameter is the directory from which the model is updated; the default value will update the model from root directory of the file system (the entire model).

`[虚拟]` QDirModel:: ~QDirModel ()

Destroys this directory model.

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

重实现： QAbstractItemModel::columnCount (const QModelIndex &parent) const.

Returns the number of columns in the parent model item.

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

重实现： QAbstractItemModel::data (const QModelIndex &index, int role) const.

Returns the data for the model item index 采用给定 role .

另请参阅 setData ().

`[override virtual]` bool QDirModel:: dropMimeData (const QMimeData * data , Qt::DropAction action , int row , int column , const QModelIndex & parent )

重实现： QAbstractItemModel::dropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent).

处理 data 的提供是通过结束拖放操作，按给定 action over the row in the model specified by the row and column and by the parent 索引。

返回 true if the drop was successful, and false otherwise.

另请参阅 supportedDropActions ().

QIcon QDirModel:: fileIcon (const QModelIndex & index ) const

Returns the icons for the item stored in the model under the given index .

QFileInfo QDirModel:: fileInfo (const QModelIndex & index ) const

Returns the file information for the specified model index .

注意： If the model index represents a symbolic link in the underlying filing system, the file information returned will contain information about the symbolic link itself, regardless of whether resolveSymlinks is enabled or not.

另请参阅 QFileInfo::symLinkTarget ().

QString QDirModel:: fileName (const QModelIndex & index ) const

Returns the name of the item stored in the model under the index 给定。

QString QDirModel:: filePath (const QModelIndex & index ) const

Returns the path of the item stored in the model under the index 给定。

QDir::Filters QDirModel:: filter () const

Returns the filter specification for the directory model.

另请参阅 setFilter () 和 QDir::Filters .

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

重实现： QAbstractItemModel::flags (const QModelIndex &index) const.

返回项标志为给定 index in the model.

另请参阅 Qt::ItemFlags .

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

重实现： QAbstractItemModel::hasChildren (const QModelIndex &parent) const.

返回 true 若 parent model item has children; otherwise returns false .

`[override virtual]` QVariant QDirModel:: headerData ( int section , Qt::Orientation orientation , int role = Qt::DisplayRole) const

重实现： QAbstractItemModel::headerData (int section, Qt::Orientation orientation, int role) const.

Returns the data stored under the given role 为指定 section of the header with the given orientation .

QFileIconProvider *QDirModel:: iconProvider () const

Returns the file icon provider for this directory model.

另请参阅 setIconProvider ().

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

重实现： QAbstractItemModel::index (int row, int column, const QModelIndex &parent) const.

Returns the model item index for the item in the parent 采用给定 row and column .

QModelIndex QDirModel:: index (const QString & path , int column = 0) const

这是重载函数。

Returns the model item index for the given path .

bool QDirModel:: isDir (const QModelIndex & index ) const

返回 true 若模型项 index represents a directory; otherwise returns false .

`[override virtual]` QMimeData QDirModel:: mimeData (const QModelIndexList & indexes* ) const

重实现： QAbstractItemModel::mimeData (const QModelIndexList &indexes) const.

返回的对象包含序列化描述为指定 indexes . The format used to describe the items corresponding to the indexes is obtained from the mimeTypes () 函数。

If the list of indexes is empty, 0 is returned rather than a serialized empty list.

`[override virtual]` QStringList QDirModel:: mimeTypes () const

重实现： QAbstractItemModel::mimeTypes () const.

Returns a list of MIME types that can be used to describe a list of items in the model.

QModelIndex QDirModel:: mkdir (const QModelIndex & parent , const QString & name )

Create a directory with the name 在 parent model item.

QStringList QDirModel:: nameFilters () const

Returns a list of filters applied to the names in the model.

另请参阅 setNameFilters ().

`[override virtual]` QModelIndex QDirModel:: parent (const QModelIndex & child ) const

重实现： QAbstractItemModel::parent (const QModelIndex &index) const.

Return the parent of the given child model item.

bool QDirModel:: remove (const QModelIndex & index )

Removes the model item index from the directory model and deletes the corresponding file from the file system , returning true if successful. If the item cannot be removed, false is returned.

警告： This function deletes files from the file system; it does not move them to a location where they can be recovered.

另请参阅 rmdir ().

bool QDirModel:: rmdir (const QModelIndex & index )

Removes the directory corresponding to the model item index in the directory model and deletes the corresponding directory from the file system , returning true if successful. If the directory cannot be removed, false is returned.

警告： This function deletes directories from the file system; it does not move them to a location where they can be recovered.

另请参阅 remove ().

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

重实现： QAbstractItemModel::rowCount (const QModelIndex &parent) const.

Returns the number of rows in the parent model item.

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

重实现： QAbstractItemModel::setData (const QModelIndex &index, const QVariant &value, int role).

Sets the data for the model item index 采用给定 role to the data referenced by the value 。返回 true 若成功；否则返回 false .

另请参阅 data () 和 Qt::ItemDataRole .

void QDirModel:: setFilter ( QDir::Filters filters )

Sets the directory model's filter to that specified by filters .

Note that the filter you set should always include the QDir::AllDirs enum value, otherwise QDirModel won't be able to read the directory structure.

另请参阅 filter () 和 QDir::Filters .

void QDirModel:: setIconProvider ( QFileIconProvider * provider )

设置 provider of file icons for the directory model.

另请参阅 iconProvider ().

void QDirModel:: setNameFilters (const QStringList & filters )

Sets the name filters for the directory model.

另请参阅 nameFilters ().

void QDirModel:: setSorting ( QDir::SortFlags sort )

Sets the directory model's sorting order to that specified by sort .

另请参阅 sorting () 和 QDir::SortFlags .

`[override virtual]` void QDirModel:: sort ( int column , Qt::SortOrder order = Qt::AscendingOrder)

重实现： QAbstractItemModel::sort (int column, Qt::SortOrder order).

Sort the model items in the column 使用 order given. The order is a value defined in Qt::SortOrder .

QDir::SortFlags QDirModel:: sorting () const

Returns the sorting method used for the directory model.

另请参阅 setSorting () 和 QDir::SortFlags .

`[override virtual]` Qt::DropActions QDirModel:: supportedDropActions () const

重实现： QAbstractItemModel::supportedDropActions () const.

返回由此模型支持的掉落动作。

另请参阅 Qt::DropActions .

QDirModel Class

公共类型

特性

公共函数

重实现公共函数

公共槽

详细描述

成员类型文档编制

enum QDirModel:: Roles

特性文档编制

lazyChildCount : bool

readOnly : bool

resolveSymlinks : bool

成员函数文档编制

QDirModel:: QDirModel ( QObject * parent = nullptr)

QDirModel:: QDirModel (const QStringList & nameFilters , QDir::Filters filters , QDir::SortFlags sort , QObject * parent = nullptr)

[slot] void QDirModel:: refresh (const QModelIndex & parent = QModelIndex())

[虚拟] QDirModel:: ~QDirModel ()

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

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

[override virtual] bool QDirModel:: dropMimeData (const QMimeData * data , Qt::DropAction action , int row , int column , const QModelIndex & parent )

QIcon QDirModel:: fileIcon (const QModelIndex & index ) const

QFileInfo QDirModel:: fileInfo (const QModelIndex & index ) const

QString QDirModel:: fileName (const QModelIndex & index ) const

QString QDirModel:: filePath (const QModelIndex & index ) const

QDir::Filters QDirModel:: filter () const

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

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

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

QFileIconProvider *QDirModel:: iconProvider () const

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

QModelIndex QDirModel:: index (const QString & path , int column = 0) const

bool QDirModel:: isDir (const QModelIndex & index ) const

[override virtual] QMimeData *QDirModel:: mimeData (const QModelIndexList & indexes ) const

[override virtual] QStringList QDirModel:: mimeTypes () const

QModelIndex QDirModel:: mkdir (const QModelIndex & parent , const QString & name )

QStringList QDirModel:: nameFilters () const

[override virtual] QModelIndex QDirModel:: parent (const QModelIndex & child ) const

bool QDirModel:: remove (const QModelIndex & index )

bool QDirModel:: rmdir (const QModelIndex & index )

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

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

void QDirModel:: setFilter ( QDir::Filters filters )

void QDirModel:: setIconProvider ( QFileIconProvider * provider )

void QDirModel:: setNameFilters (const QStringList & filters )

void QDirModel:: setSorting ( QDir::SortFlags sort )

[override virtual] void QDirModel:: sort ( int column , Qt::SortOrder order = Qt::AscendingOrder)

QDir::SortFlags QDirModel:: sorting () const

[override virtual] Qt::DropActions QDirModel:: supportedDropActions () const

内容

`[slot]` void QDirModel:: refresh (const QModelIndex & parent = QModelIndex())

`[虚拟]` QDirModel:: ~QDirModel ()

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

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

`[override virtual]` bool QDirModel:: dropMimeData (const QMimeData * data , Qt::DropAction action , int row , int column , const QModelIndex & parent )

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

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

`[override virtual]` QVariant QDirModel:: headerData ( int section , Qt::Orientation orientation , int role = Qt::DisplayRole) const

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

`[override virtual]` QMimeData QDirModel:: mimeData (const QModelIndexList & indexes* ) const

`[override virtual]` QStringList QDirModel:: mimeTypes () const

`[override virtual]` QModelIndex QDirModel:: parent (const QModelIndex & child ) const

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

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

`[override virtual]` void QDirModel:: sort ( int column , Qt::SortOrder order = Qt::AscendingOrder)

`[override virtual]` Qt::DropActions QDirModel:: supportedDropActions () const