Qt 4.8: QML FolderListModel Element

Qt Reference Documentation

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# QML FolderListModel Element

The FolderListModel provides a model of the contents of a file system folder. More...

- List of all members, including inherited members

## Properties

- count : int
- folder : string
- nameFilters : list<string>
- parentFolder : url
- showDirs : bool
- showDotAndDotDot : bool
- showOnlyReadable : bool
- sortField : enumeration
- sortReversed : bool

## Methods

- isFolder

## Detailed Description

FolderListModel provides access to information about the contents of a folder in the local file system, exposing a list of files to views and other data components.

Note: This type is made available by importing the `Qt.labs.folderlistmodel` module. Elements in the Qt.labs module are not guaranteed to remain compatible in future versions.

import Qt.labs.folderlistmodel 1.0

The folder property specifies the folder to access. Information about the files and directories in the folder is supplied via the model's interface. Components access names and paths via the following roles:

- fileName
- filePath

Additionally a file entry can be differentiated from a folder entry via the isFolder() method.

## Filtering

Various properties can be set to filter the number of files and directories exposed by the model.

The nameFilters property can be set to contain a list of wildcard filters that are applied to names of files and directories, causing only those that match the filters to be exposed.

Directories can be included or excluded using the showDirs property, and navigation directories can also be excluded by setting the showDotAndDotDot property to false.

It is sometimes useful to limit the files and directories exposed to those that the user can access. The showOnlyReadable property can be set to enable this feature.

## Example Usage

The following example shows a FolderListModel being used to provide a list of QML files in a ListView:

     import QtQuick 1.0
     import Qt.labs.folderlistmodel 1.0

     ListView {
         width: 200; height: 400

         FolderListModel {
             id: folderModel
             nameFilters: ["*.qml"]
         }

         Component {
             id: fileDelegate
             Text { text: fileName }
         }

         model: folderModel
         delegate: fileDelegate
     }

## Path Separators

Qt uses "/" as a universal directory separator in the same way that "/" is used as a path separator in URLs. If you always use "/" as a directory separator, Qt will translate your paths to conform to the underlying operating system.

See also QML Data Models.

## Property Documentation

read-onlycount : int

Returns the number of items in the current folder that match the filter criteria.

folder : string

The folder property holds a URL for the folder that the model is currently providing.

The value is a URL expressed as a string, and must be a `file`: or `qrc`: URL, or a relative URL.

By default, the value is an invalid URL.

nameFilters : list<string>

The nameFilters property contains a list of file name filters. The filters may include the ? and * wildcards.

The example below filters on PNG and JPEG files:

     FolderListModel {
         nameFilters: [ "*.png", "*.jpg" ]
     }

Note: Directories are not excluded by filters.

read-onlyparentFolder : url

Returns the URL of the parent of of the current folder.

showDirs : bool

If true, directories are included in the model; otherwise only files are included.

By default, this property is true.

Note that the nameFilters are not applied to directories.

See also showDotAndDotDot.

showDotAndDotDot : bool

If true, the "." and ".." directories are included in the model; otherwise they are excluded.

By default, this property is false.

See also showDirs.

showOnlyReadable : bool

If true, only readable files and directories are shown; otherwise all files and directories are shown.

By default, this property is false.

See also showDirs.

sortField : enumeration

The sortField property contains field to use for sorting. sortField may be one of:

- Unsorted - no sorting is applied. The order is system default.
- Name - sort by filename
- Time - sort by time modified
- Size - sort by file size
- Type - sort by file type (extension)

See also sortReversed.

sortReversed : bool

If set to true, reverses the sort order. The default is false.

See also sortField.

## Method Documentation

bool FolderListModel::isFolder ( int index )

Returns true if the entry index is a folder; otherwise returns false.