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The QFileSystemModel class provides a data model for the local filesystem. More...
#include <QFileSystemModel>
Inherits QAbstractItemModel.
This class was introduced in Qt 4.4.
The QFileSystemModel class provides a data model for the local filesystem.
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 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 the 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.
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(), name(), and path() 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 a GUI application.
See also Model Classes.
| Constant | Value |
|---|---|
| QFileSystemModel::FileIconRole | Qt::DecorationRole |
| QFileSystemModel::FilePathRole | Qt::UserRole + 1 |
| QFileSystemModel::FileNameRole | Qt::UserRole + 2 |
| QFileSystemModel::FilePermissions | Qt::UserRole + 3 |
This property holds whether files that don't pass the name filter are hidden or disabled.
This property is true by default
Access functions:
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.
This property is true by default
Access functions:
This property holds whether the directory model should resolve symbolic links.
This is only relevant on operating systems that support symbolic links.
By default, this property is false.
Access functions:
Constructs a file system model with the given parent.
Destroys this file system model.
Handles the data supplied by a drag and drop operation that ended with the given action over the row in the model specified by the row and column and by the parent index.
Reimplemented from QAbstractItemModel.
See also supportedDropActions().
Returns the icon for the item stored in the model under the given index.
Returns the QFileInfo for the item stored in the model under the given index.
Returns the file name for the item stored in the model under the given index.
Returns the path of the item stored in the model under the index given.
This signal is emitted whenever a file with the oldName is successfully renamed to newName. The file is located in in the directory path.
Returns the filter specified for the directory model.
If a filter has not been set, the default filter is QDir::AllEntries | QDir::NoDotAndDotDot | QDir::AllDirs.
See also setFilter() and QDir::Filters.
Returns the file icon provider for this directory model.
See also setIconProvider().
This is an overloaded member function, provided for convenience.
Returns the model item index for the given path and column.
Returns true if the model item index represents a directory; otherwise returns false.
Returns the date and time when index was last modified.
Returns an object that contains a serialized description of the specified indexes. The format used to describe the items corresponding to the indexes is obtained from the mimeTypes() function.
If the list of indexes is empty, 0 is returned rather than a serialized empty list.
Reimplemented from QAbstractItemModel.
Returns a list of MIME types that can be used to describe a list of items in the model.
Reimplemented from QAbstractItemModel.
Create a directory with the name in the parent model index.
Returns the data stored under the given role for the item "My Computer".
See also Qt::ItemDataRole.
Returns a list of filters applied to the names in the model.
See also setNameFilters().
Returns the complete OR-ed together combination of QFile::Permission for the index.
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().
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().
The currently set directory
See also rootPath().
The currently set root path
See also setRootPath() and rootDirectory().
This signal is emitted whenever the root path has been changed to a newPath.
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 QFileSystemModel won't be able to read the directory structure.
See also filter() and QDir::Filters.
Sets the provider of file icons for the directory model.
See also iconProvider().
Sets the name filters to apply against the existing files.
See also nameFilters().
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().
Returns the size in bytes of index. If the file does not exist, 0 is returned.
Returns the type of file index such as "Directory" or "JPEG file".
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