QFileSystemModel

The QFileSystemModel class provides a data model for the local filesystem. More

Inheritance diagram of PySide2.QtWidgets.QFileSystemModel

Synopsis

Functions

Signals

Detailed Description

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 filter.

QFileSystemModel 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() , isDir() , fileName() and filePath() functions provide information about the underlying files and directories related to items in the model. Directories can be created and removed using mkdir() , rmdir() .

Note

QFileSystemModel requires an instance of QApplication .

Example Usage

A directory model that displays the contents of a default directory is usually constructed with a parent object:

model = QFileSystemModel()
model.setRootPath(QDir.currentPath())

A tree view can be used to display the contents of the model

tree =  QTreeView()

tree.setModel(model)

and the contents of a particular directory can be displayed by setting the tree view’s root index:

tree.setRootIndex(model.index(QDir.currentPath()))

The view’s root index can be used to control how much of a hierarchical model is displayed. QFileSystemModel provides a convenience function that returns a suitable model index for a path to a directory within the model.

Caching and Performance

QFileSystemModel will not fetch any files or directories until setRootPath() is called. This will prevent any unnecessary querying on the file system until that point such as listing the drives on Windows.

Unlike QDirModel , QFileSystemModel uses a separate thread to populate itself so it will not cause the main thread to hang as the file system is being queried. Calls to rowCount() will return 0 until the model populates a directory.

QFileSystemModel keeps a cache with file information. The cache is automatically kept up to date using the QFileSystemWatcher .

See also

Model Classes

class QFileSystemModel([parent=None])
param parent

QObject

Constructs a file system model with the given parent .

PySide2.QtWidgets.QFileSystemModel.Roles

Constant

Description

QFileSystemModel.FileIconRole

QFileSystemModel.FilePathRole

QFileSystemModel.FileNameRole

QFileSystemModel.FilePermissions

PySide2.QtWidgets.QFileSystemModel.Option

Constant

Description

QFileSystemModel.DontWatchForChanges

Do not add file watchers to the paths. This reduces overhead when using the model for simple tasks like line edit completion.

QFileSystemModel.DontResolveSymlinks

Don’t resolve symlinks in the file system model. By default, symlinks are resolved.

QFileSystemModel.DontUseCustomDirectoryIcons

Always use the default directory icon. Some platforms allow the user to set a different icon. Custom icon lookup causes a big performance impact over network or removable drives. This sets the DontUseCustomDirectoryIcons option in the icon provider accordingly.

See also

resolveSymlinks

New in version 5.14.

PySide2.QtWidgets.QFileSystemModel.directoryLoaded(path)
Parameters

path – unicode

PySide2.QtWidgets.QFileSystemModel.fileIcon(index)
Parameters

indexQModelIndex

Return type

QIcon

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

PySide2.QtWidgets.QFileSystemModel.fileInfo(index)
Parameters

indexQModelIndex

Return type

QFileInfo

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

PySide2.QtWidgets.QFileSystemModel.fileName(index)
Parameters

indexQModelIndex

Return type

unicode

Returns the file name for the item stored in the model under the given index .

PySide2.QtWidgets.QFileSystemModel.filePath(index)
Parameters

indexQModelIndex

Return type

unicode

Returns the path of the item stored in the model under the index given.

PySide2.QtWidgets.QFileSystemModel.fileRenamed(path, oldName, newName)
Parameters
  • path – unicode

  • oldName – unicode

  • newName – unicode

PySide2.QtWidgets.QFileSystemModel.filter()
Return type

Filters

Returns the filter specified for the directory model.

If a filter has not been set, the default filter is AllEntries | NoDotAndDotDot | AllDirs .

See also

setFilter() Filters

PySide2.QtWidgets.QFileSystemModel.iconProvider()
Return type

QFileIconProvider

Returns the file icon provider for this directory model.

PySide2.QtWidgets.QFileSystemModel.index(path[, column=0])
Parameters
  • path – unicode

  • columnint

Return type

QModelIndex

This is an overloaded function.

Returns the model item index for the given path and column .

PySide2.QtWidgets.QFileSystemModel.isDir(index)
Parameters

indexQModelIndex

Return type

bool

Returns true if the model item index represents a directory; otherwise returns false .

PySide2.QtWidgets.QFileSystemModel.isReadOnly()
Return type

bool

PySide2.QtWidgets.QFileSystemModel.lastModified(index)
Parameters

indexQModelIndex

Return type

QDateTime

Returns the date and time when index was last modified.

PySide2.QtWidgets.QFileSystemModel.mkdir(parent, name)
Parameters
  • parentQModelIndex

  • name – unicode

Return type

QModelIndex

Create a directory with the name in the parent model index.

PySide2.QtWidgets.QFileSystemModel.myComputer([role=Qt.DisplayRole])
Parameters

roleint

Return type

object

Returns the data stored under the given role for the item “My Computer”.

See also

ItemDataRole

PySide2.QtWidgets.QFileSystemModel.nameFilterDisables()
Return type

bool

PySide2.QtWidgets.QFileSystemModel.nameFilters()
Return type

list of strings

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

See also

setNameFilters()

PySide2.QtWidgets.QFileSystemModel.options()
Return type

Options

See also

setOptions()

PySide2.QtWidgets.QFileSystemModel.remove(index)
Parameters

indexQModelIndex

Return type

bool

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

Warning

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

See also

rmdir()

Return type

bool

PySide2.QtWidgets.QFileSystemModel.rmdir(index)
Parameters

indexQModelIndex

Return type

bool

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

Warning

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

See also

remove()

PySide2.QtWidgets.QFileSystemModel.rootDirectory()
Return type

QDir

The currently set directory

See also

rootPath()

PySide2.QtWidgets.QFileSystemModel.rootPath()
Return type

unicode

The currently set root path

PySide2.QtWidgets.QFileSystemModel.rootPathChanged(newPath)
Parameters

newPath – unicode

PySide2.QtWidgets.QFileSystemModel.setFilter(filters)
Parameters

filtersFilters

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

Note that the filter you set should always include the AllDirs enum value, otherwise QFileSystemModel won’t be able to read the directory structure.

See also

filter() Filters

PySide2.QtWidgets.QFileSystemModel.setIconProvider(provider)
Parameters

providerQFileIconProvider

Sets the provider of file icons for the directory model.

See also

iconProvider()

PySide2.QtWidgets.QFileSystemModel.setNameFilterDisables(enable)
Parameters

enablebool

PySide2.QtWidgets.QFileSystemModel.setNameFilters(filters)
Parameters

filters – list of strings

Sets the name filters to apply against the existing files.

See also

nameFilters()

PySide2.QtWidgets.QFileSystemModel.setOption(option[, on=true])
Parameters
  • optionOption

  • onbool

Sets the given option to be enabled if on is true; otherwise, clears the given option .

Options should be set before changing properties.

See also

options testOption()

PySide2.QtWidgets.QFileSystemModel.setOptions(options)
Parameters

optionsOptions

See also

options()

PySide2.QtWidgets.QFileSystemModel.setReadOnly(enable)
Parameters

enablebool

See also

isReadOnly()

Parameters

enablebool

PySide2.QtWidgets.QFileSystemModel.setRootPath(path)
Parameters

path – unicode

Return type

QModelIndex

Sets the directory that is being watched by the model to newPath by installing a file system watcher on it. Any changes to files and directories within this directory will be reflected in the model.

If the path is changed, the rootPathChanged() signal will be emitted.

Note

This function does not change the structure of the model or modify the data available to views. In other words, the “root” of the model is not changed to include only files and directories within the directory specified by newPath in the file system.

See also

rootPath()

PySide2.QtWidgets.QFileSystemModel.size(index)
Parameters

indexQModelIndex

Return type

qint64

Returns the size in bytes of index . If the file does not exist, 0 is returned.

PySide2.QtWidgets.QFileSystemModel.testOption(option)
Parameters

optionOption

Return type

bool

Returns true if the given option is enabled; otherwise, returns false.

See also

options setOption()

PySide2.QtWidgets.QFileSystemModel.type(index)
Parameters

indexQModelIndex

Return type

unicode

Returns the type of file index such as “Directory” or “JPEG file”.