nsISupports
Last changed in Gecko 17.0 (Firefox 17.0 / Thunderbird 17.0 / SeaMonkey 2.14)Implemented by: @mozilla.org/filepicker;1
. To create an instance, use:
var filePicker = Components.classes["@mozilla.org/filepicker;1"] .createInstance(Components.interfaces.nsIFilePicker);
Method overview
void appendFilter(in AString title, in AString filter); |
void appendFilters(in long filterMask); |
void init(in nsIDOMWindow parent, in AString title, in short mode); |
void open(in nsIFilePickerShownCallback aFilePickerShownCallback); |
short show(); Deprecated since Gecko 17.0 |
Attributes
Attribute | Type | Description |
addToRecentDocs |
boolean |
If true , the file is added to the operating system's "recent documents" list (if the operating system has one; nothing happens if there is no such concept on the user's platform). This attribute has no effect if private browsing mode is in effect. |
defaultExtension |
AString |
The extension for the type of files you want to work with. On some platforms, this is automatically appended to filenames the user enters, if required. Specify it without a leading dot, for example "jpg". |
defaultString |
AString |
The filename, including extension, that should be suggested to the user as a default. This should be set before calling open() or show() .
Exceptions thrown
|
displayDirectory |
|
The directory that the file picker dialog should initially display. This should be set this before calling open() or show() to specify a starting point. |
file |
|
The currently selected file or directory. Read only. |
files |
|
An enumerator of the currently selected files. Read only. Note: Only works with modeOpenMultiple mode. |
fileURL |
|
The URI of the currently selected file or directory. Read only. |
filterIndex |
long |
The (0-based) index of the filter which is currently selected in the file picker dialog. Set this to choose a particular filter to be selected by default. |
Constants
Mode constants
These constants are used to specify the type of file picker to create when calling init()
.
Constant | Value | Description |
modeOpen |
0 |
Load a file. |
modeSave |
1 |
Save a file. |
modeGetFolder |
2 |
Select a folder/directory. |
modeOpenMultiple |
3 |
Load multiple files. |
Return value constants
These values are returned by show()
, indicating the result of the file picker activity.
Constant | Value | Description |
returnOK |
0 |
The file picker dialog was closed by the user hitting 'Ok' |
returnCancel |
1 |
The file picker dialog was closed by the user hitting 'Cancel' |
returnReplace |
2 |
The user chose an existing file and acknowledged that they want to overwrite the file |
Filter constants
These constants are used to create filters for commonly-used file types. For the most up to date list see filepicker.properties.
Constant | Value | Description |
filterAll |
0x001 |
Corresponds to the *.* filter for file extensions. All files will pass through the filter. |
filterHTML |
0x002 |
Corresponds to the *.html, *.htm, *.shtml and *.xhtml filters for file extensions. |
filterText |
0x004 |
Corresponds to the *.txt and *.text filter for file extensions. |
filterImages |
0x008 |
Corresponds to the *.jpe, *.jpg, *.jpeg, *.gif, *.png, *.bmp, *.ico, *.svg, *.svgz, *.tif, *.tiff, *.ai, *.drw, *.pct, *.psp, *.xcf, *.psd and *.raw filters for file extensions. |
filterXML |
0x010 |
Corresponds to the *.xml filter for file extensions. |
filterXUL |
0x020 |
Corresponds to the *.xul filter for file extensions. |
filterApps |
0x040 |
Corresponds to the platform specific application filter for file extensions. Application files for the user's platform will pass through the filter. |
filterAllowURLs |
0x80 |
Allow URLs. |
filterAudio |
0x100 |
Corresponds to the *.aac, *.aif, *.flac, *.iff, *.m4a, *.m4b, *.mid, *.midi, *.mp3, *.mpa, *.mpc, *.oga, *.ogg, *.ra, *.ram, *.snd, *.wav and *.wma filters for file extensions. |
filterVideo |
0x200 |
Corresponds to the *.avi, *.divx, *.flv, *.m4v, *.mkv, *.mov, *.mp4, *.mpeg, *.mpg, *.ogm, *.ogv, *.ogx, *.rm, *.rmvb, *.smil, *.webm, *.wmv and *.xvid filters for file extensions. |
Methods
appendFilter()
Appends a custom file extension filter to the dialog. The filter appended first will be used to display the nsIFilePicker
dialog, the user may then select another from the list.
void appendFilter( in AString title, in AString filter );
Parameters
title
- The title of the filter.
filter
- The filter string. Multiple extensions may be included, separated by a semicolon and a space.
Example
Some example filter strings:
- "*.ics"
- "*.txt; *.doc; *.rtf"
appendFilters()
Appends a list of file extension filters, from the predefined list, to the dialog.
void appendFilters( in long filterMask );
Parameters
appendFilters
is the first (or only) call to set the file filters the filter with the smallest code will be used as default filter when displaying the nsIFilePicker
dialog. If you would like to use another you must append it separately before the others you want to go into the drop down list.filterMask
- A combination of the filters you wish to use. You may OR multiple filters together; for example
filterAll | filterHTML
.
init()
Initialize the file picker widget. The file picker is not valid until this method is called.
void init( in nsIDOMWindow parent, in AString title, in short mode );
Parameters
parent
- The
nsIDOMWindow
parent. This dialog will be dependent on this parent. Must be non-null. title
- The file picker dialog title. If this is
null
, the dialog will have the default title. mode
- One of the mode constants, indicating the type of picker to create.
open()
Opens the file dialog asynchrounously. The passed in object's done method will be called upon completion.
void open( in nsIFilePickerShownCallback aFilePickerShownCallback );
Parameters
aFilePickerShownCallback
- The
nsIFilePickerShownCallback
to be called on completion.
show
Displays the file picker dialog. The dialog is displayed modally.
short show();
Parameters
None.
Return value
One of the return constants.
Example
Here's an example:
const nsIFilePicker = Components.interfaces.nsIFilePicker; var fp = Components.classes["@mozilla.org/filepicker;1"] .createInstance(nsIFilePicker); fp.init(window, "Dialog Title", nsIFilePicker.modeOpen); fp.appendFilters(nsIFilePicker.filterAll | nsIFilePicker.filterText); var rv = fp.show(); if (rv == nsIFilePicker.returnOK || rv == nsIFilePicker.returnReplace) { var file = fp.file; // Get the path as string. Note that you usually won't // need to work with the string paths. var path = fp.file.path; // work with returned nsILocalFile... }
If your code is a component and window
is not defined, you can get one using nsIWindowMediator
.
When selecting multiple files:
.... fp.init(window, "Dialog Title", nsIFilePicker.modeOpenMultiple); .... var files = fp.files; var paths = []; while (files.hasMoreElements()) { var arg = files.getNext().QueryInterface(Components.interfaces.nsILocalFile).path; paths.push(arg); }