The FolderListModel provides a model of the contents of a file system folder. 更多...
| import 语句： | import Qt.labs.folderlistmodel 2.5 |
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.
注意：
This type is made available by importing the
Qt.labs.folderlistmodel
模块。
Elements in the Qt.labs module are not guaranteed to remain compatible in future versions.
import Qt.labs.folderlistmodel
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
fileURL
(since Qt 5.2; deprecated since Qt 5.15)
fileUrl
(since Qt 5.15)
fileBaseName
fileSuffix
fileSize
fileModified
fileAccessed
fileIsDir
Additionally a file entry can be differentiated from a folder entry via the isFolder () 方法。
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, navigation directories can also be excluded by setting the showDotAndDotDot property to false, hidden files can be included or excluded using the showHidden 特性。
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.
The following example shows a FolderListModel being used to provide a list of QML files in a ListView :
import QtQuick import Qt.labs.folderlistmodel ListView { width: 200; height: 400 FolderListModel { id: folderModel nameFilters: ["*.qml"] } Component { id: fileDelegate Text { text: fileName } } model: folderModel delegate: fileDelegate }
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.
另请参阅 QML Data Models .
|
caseSensitive : bool |
Use case sensitive pattern matching.
默认情况下，此特性为 true。
|
count : int |
Returns the number of items in the current folder that match the filter criteria.
|
folder : url |
The folder property holds a URL for the folder that the model currently provides.
The value must be a
file
: or
qrc
: URL, or a relative URL.
The default value is an invalid URL.
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" ] }
注意： Directories are not excluded by filters.
|
parentFolder : url |
Returns the URL of the parent of the current folder .
|
rootFolder : url |
When this property is set, the given folder will be treated as the root in the file system, so that you can only traverse subfolders within it.
|
showDirs : bool |
If true, directories are included in the model; otherwise only files are included.
默认情况下，此特性为 true。
注意， nameFilters are not applied to directories.
另请参阅 showDotAndDotDot .
|
showDirsFirst : bool |
If true, if directories are included in the model they will always be shown first, then the files.
默认情况下，此特性为 false。
|
showDotAndDotDot : bool |
If true, the "." and ".." directories are included in the model; otherwise they are excluded.
默认情况下，此特性为 false。
另请参阅 showDirs .
|
showFiles : bool |
If true, files are included in the model; otherwise only directories are included.
默认情况下，此特性为 true。
另请参阅 showDirs .
|
showHidden : bool |
If true, hidden files and directories are included in the model; otherwise they are excluded.
默认情况下，此特性为 false。
|
showOnlyReadable : bool |
If true, only readable files and directories are shown; otherwise all files and directories are shown.
默认情况下，此特性为 false。
另请参阅 showDirs .
|
sortCaseSensitive : bool |
若设为
true
, the sort is case sensitive. This property is
true
在默认情况下。
|
sortField : enumeration |
The
sortField
property contains the field to use for sorting.
sortField
may be one of:
| 常量 | 描述 |
|---|---|
Unsorted
|
no sorting is applied |
名称
|
sort by filename |
时间
|
sort by time modified |
Size
|
sort by file size |
类型
|
sort by file type (extension) |
另请参阅 sortReversed .
|
sortReversed : bool |
If set to true, reverses the sort order. The default is false.
另请参阅 sortField .
|
status : enumeration |
This property holds the status of folder reading. It can be one of:
| 常量 | 描述 |
|---|---|
FolderListModel.Null
|
no folder has been set |
FolderListModel.Ready
|
the folder has been loaded |
FolderListModel.Loading
|
the folder is currently being loaded |
Use this status to provide an update or respond to the status change in some way. For example, you could:
State { name: 'loaded'; when: folderModel.status == FolderListModel.Ready }
onStatusChanged
signal handler:
FolderListModel { id : folderModel onStatusChanged : if ( folderModel . status == FolderListModel . Ready ) console . log ( 'Loaded' ) }
Text { text: folderModel.status == FolderListModel.Ready ? 'Loaded' : 'Not loaded' }
Returns the folder property 为给定 index . The following properties are available:
fileName
filePath
fileURL
(since Qt 5.2; deprecated since Qt 5.15)
fileUrl
(since Qt 5.15)
fileBaseName
fileSuffix
fileSize
fileModified
fileAccessed
fileIsDir
返回索引为给定 file URL if the model contains it, or -1 if not.
Returns true if the entry index is a folder; otherwise returns false.