A native file dialog. 更多...
导入语句: | import Qt.labs.platform 1.1 |
Since: | Qt 5.8 |
继承: | Dialog |
The FileDialog type provides a QML API for native platform file dialogs.
To show a file dialog, construct an instance of FileDialog, set the desired properties, and call open() 。 currentFile or currentFiles properties can be used to determine the currently selected file(s) in the dialog. The file and 文件 properties are updated only after the final selection has been made by accepting the dialog.
MenuItem { text: "Open..." onTriggered: fileDialog.open() } FileDialog { id: fileDialog currentFile: document.source folder: StandardPaths.writableLocation(StandardPaths.DocumentsLocation) } MyDocument { id: document source: fileDialog.file }
A native platform file dialog is currently available on the following platforms:
The Qt Labs Platform module uses Qt Widgets as a fallback on platforms that do not have a native implementation available. Therefore, applications that use types from the Qt Labs Platform module should link to QtWidgets and use QApplication 而不是 QGuiApplication .
To link against the QtWidgets library, add the following to your qmake project file:
QT += widgets
Create an instance of
QApplication
in
main()
:
#include <QApplication> #include <QQmlApplicationEngine> int main(int argc, char *argv[]) { QApplication app(argc, argv); QQmlApplicationEngine engine; engine.load(QUrl(QStringLiteral("qrc:/main.qml"))); return app.exec(); }
注意: Types in Qt.labs modules are not guaranteed to remain compatible in future versions.
另请参阅 FolderDialog and StandardPaths .
acceptLabel : string |
This property holds the label text shown on the button that accepts the dialog.
When set to an empty string, the default label of the underlying platform is used. The default label is typically 打开 or Save depending on which fileMode the dialog is used in.
默认值为空字符串。
另请参阅 rejectLabel .
currentFile : url |
This property holds the currently selected file in the dialog.
不像
file
property, the
currentFile
property is updated while the user is selecting files in the dialog, even before the final selection has been made.
另请参阅 file and currentFiles .
currentFiles : list < url > |
This property holds the currently selected files in the dialog.
不像
文件
property, the
currentFiles
property is updated while the user is selecting files in the dialog, even before the final selection has been made.
另请参阅 文件 and currentFile .
defaultSuffix : string |
This property holds a suffix that is added to selected files that have no suffix specified. The suffix is typically used to indicate the file type (e.g. "txt" indicates a text file).
If the first character is a dot ('.'), it is removed.
file : url |
This property holds the final accepted file.
不像
currentFile
property, the
file
property is not updated while the user is selecting files in the dialog, but only after the final selection has been made. That is, when the user has clicked
OK
to accept a file. Alternatively, the
accepted()
signal can be handled to get the final selection.
另请参阅 currentFile and accepted() .
fileMode : enumeration |
This property holds the mode of the dialog.
Available values:
常量 | 描述 |
---|---|
FileDialog.OpenFile
|
The dialog is used to select an existing file (default). |
FileDialog.OpenFiles
|
The dialog is used to select multiple existing files. |
FileDialog.SaveFile
|
The dialog is used to select any file. The file does not have to exist. |
文件 : list < url > |
This property holds the final accepted files.
不像
currentFiles
property, the
文件
property is not updated while the user is selecting files in the dialog, but only after the final selection has been made. That is, when the user has clicked
OK
to accept files. Alternatively, the
accepted()
signal can be handled to get the final selection.
另请参阅 currentFiles and accepted() .
folder : url |
This property holds the folder where files are selected. For selecting a folder, use FolderDialog 代替。
另请参阅 FolderDialog .
nameFilters : list < string > |
This property holds the filters that restrict the types of files that can be selected.
FileDialog { nameFilters: ["Text files (*.txt)", "HTML files (*.html *.htm)"] }
注意:
*.*
is not a portable filter, because the historical assumption that the file extension determines the file type is not consistent on every operating system. It is possible to have a file with no dot in its name (for example,
Makefile
). In a native Windows file dialog,
*.*
will match such files, while in other types of file dialogs it may not. So it is better to use
*
if you mean to select any file.
另请参阅 selectedNameFilter .
options : flags |
This property holds the various options that affect the look and feel of the dialog.
默认情况下,所有选项是被禁用的。
Options should be set before showing the dialog. Setting them while the dialog is visible is not guaranteed to have an immediate effect on the dialog (depending on the option and on the platform).
Available options:
常量 | 描述 |
---|---|
FileDialog.DontResolveSymlinks
|
不解析文件对话框中的符号链接。默认情况下,解析符号链接。 |
FileDialog.DontConfirmOverwrite
|
不要求确认,若选中现有文件。默认情况下,请求确认。 |
FileDialog.ReadOnly
|
Indicates that the dialog doesn't allow creating directories. |
FileDialog.HideNameFilterDetails
|
指示是否隐藏文件名过滤器细节。 |
rejectLabel : string |
This property holds the label text shown on the button that rejects the dialog.
When set to an empty string, the default label of the underlying platform is used. The default label is typically Cancel .
默认值为空字符串。
另请参阅 acceptLabel .
selectedNameFilter group |
---|
selectedNameFilter.extensions : list < string > |
selectedNameFilter.index : int |
selectedNameFilter.name : string |
These properties hold the currently selected name filter.
名称 | 描述 |
---|---|
index : int | This property determines which name filter is selected. The specified filter is selected when the dialog is opened. The value is updated when the user selects another filter. |
[read-only] 名称 : string |
This property holds the name of the selected filter. In the example below, the name of the first filter is
"Text files"
and the second is
"HTML files"
.
|
[read-only] extensions : list<string> |
This property holds the list of extensions of the selected filter. In the example below, the list of extensions of the first filter is
["txt"]
and the second is
["html", "htm"]
.
|
FileDialog { id: fileDialog selectedNameFilter.index: 1 nameFilters: ["Text files (*.txt)", "HTML files (*.html *.htm)"] } MyDocument { id: document fileType: fileDialog.selectedNameFilter.extensions[0] }
另请参阅 nameFilters .