## GtkFileChooser

GtkFileChooser — File chooser interface used by GtkFileChooserWidget and GtkFileChooserDialog

## Synopsis

    #include <gtk/gtk.h>

                GtkFileChooser;
    enum        GtkFileChooserAction;
    enum        GtkFileChooserConfirmation;
    #define     GTK_FILE_CHOOSER_ERROR
    enum        GtkFileChooserError;
    GQuark      gtk_file_chooser_error_quark    (void);
    void        gtk_file_chooser_set_action     (GtkFileChooser *chooser,
                                                 GtkFileChooserAction action);
    GtkFileChooserAction gtk_file_chooser_get_action
                                                (GtkFileChooser *chooser);
    void        gtk_file_chooser_set_local_only (GtkFileChooser *chooser,
                                                 gboolean local_only);
    gboolean    gtk_file_chooser_get_local_only (GtkFileChooser *chooser);
    void        gtk_file_chooser_set_select_multiple
                                                (GtkFileChooser *chooser,
                                                 gboolean select_multiple);
    gboolean    gtk_file_chooser_get_select_multiple
                                                (GtkFileChooser *chooser);
    void        gtk_file_chooser_set_show_hidden
                                                (GtkFileChooser *chooser,
                                                 gboolean show_hidden);
    gboolean    gtk_file_chooser_get_show_hidden
                                                (GtkFileChooser *chooser);
    void        gtk_file_chooser_set_do_overwrite_confirmation
                                                (GtkFileChooser *chooser,
                                                 gboolean do_overwrite_confirmation);
    gboolean    gtk_file_chooser_get_do_overwrite_confirmation
                                                (GtkFileChooser *chooser);
    void        gtk_file_chooser_set_current_name
                                                (GtkFileChooser *chooser,
                                                 const gchar *name);
    gchar*      gtk_file_chooser_get_filename   (GtkFileChooser *chooser);
    gboolean    gtk_file_chooser_set_filename   (GtkFileChooser *chooser,
                                                 const char *filename);
    gboolean    gtk_file_chooser_select_filename
                                                (GtkFileChooser *chooser,
                                                 const char *filename);
    void        gtk_file_chooser_unselect_filename
                                                (GtkFileChooser *chooser,
                                                 const char *filename);
    void        gtk_file_chooser_select_all     (GtkFileChooser *chooser);
    void        gtk_file_chooser_unselect_all   (GtkFileChooser *chooser);
    GSList*     gtk_file_chooser_get_filenames  (GtkFileChooser *chooser);
    gboolean    gtk_file_chooser_set_current_folder
                                                (GtkFileChooser *chooser,
                                                 const gchar *filename);
    gchar*      gtk_file_chooser_get_current_folder
                                                (GtkFileChooser *chooser);
    gchar*      gtk_file_chooser_get_uri        (GtkFileChooser *chooser);
    gboolean    gtk_file_chooser_set_uri        (GtkFileChooser *chooser,
                                                 const char *uri);
    gboolean    gtk_file_chooser_select_uri     (GtkFileChooser *chooser,
                                                 const char *uri);
    void        gtk_file_chooser_unselect_uri   (GtkFileChooser *chooser,
                                                 const char *uri);
    GSList*     gtk_file_chooser_get_uris       (GtkFileChooser *chooser);
    gboolean    gtk_file_chooser_set_current_folder_uri
                                                (GtkFileChooser *chooser,
                                                 const gchar *uri);
    gchar*      gtk_file_chooser_get_current_folder_uri
                                                (GtkFileChooser *chooser);
    void        gtk_file_chooser_set_preview_widget
                                                (GtkFileChooser *chooser,
                                                 GtkWidget *preview_widget);
    GtkWidget*  gtk_file_chooser_get_preview_widget
                                                (GtkFileChooser *chooser);
    void        gtk_file_chooser_set_preview_widget_active
                                                (GtkFileChooser *chooser,
                                                 gboolean active);
    gboolean    gtk_file_chooser_get_preview_widget_active
                                                (GtkFileChooser *chooser);
    void        gtk_file_chooser_set_use_preview_label
                                                (GtkFileChooser *chooser,
                                                 gboolean use_label);
    gboolean    gtk_file_chooser_get_use_preview_label
                                                (GtkFileChooser *chooser);
    char*       gtk_file_chooser_get_preview_filename
                                                (GtkFileChooser *chooser);
    char*       gtk_file_chooser_get_preview_uri
                                                (GtkFileChooser *chooser);
    void        gtk_file_chooser_set_extra_widget
                                                (GtkFileChooser *chooser,
                                                 GtkWidget *extra_widget);
    GtkWidget*  gtk_file_chooser_get_extra_widget
                                                (GtkFileChooser *chooser);
    void        gtk_file_chooser_add_filter     (GtkFileChooser *chooser,
                                                 GtkFileFilter *filter);
    void        gtk_file_chooser_remove_filter  (GtkFileChooser *chooser,
                                                 GtkFileFilter *filter);
    GSList*     gtk_file_chooser_list_filters   (GtkFileChooser *chooser);
    void        gtk_file_chooser_set_filter     (GtkFileChooser *chooser,
                                                 GtkFileFilter *filter);
    GtkFileFilter* gtk_file_chooser_get_filter  (GtkFileChooser *chooser);
    gboolean    gtk_file_chooser_add_shortcut_folder
                                                (GtkFileChooser *chooser,
                                                 const char *folder,
                                                 GError **error);
    gboolean    gtk_file_chooser_remove_shortcut_folder
                                                (GtkFileChooser *chooser,
                                                 const char *folder,
                                                 GError **error);
    GSList*     gtk_file_chooser_list_shortcut_folders
                                                (GtkFileChooser *chooser);
    gboolean    gtk_file_chooser_add_shortcut_folder_uri
                                                (GtkFileChooser *chooser,
                                                 const char *uri,
                                                 GError **error);
    gboolean    gtk_file_chooser_remove_shortcut_folder_uri
                                                (GtkFileChooser *chooser,
                                                 const char *uri,
                                                 GError **error);
    GSList*     gtk_file_chooser_list_shortcut_folder_uris
                                                (GtkFileChooser *chooser);

## Object Hierarchy

      GInterface
       +----GtkFileChooser

## Prerequisites

GtkFileChooser requires GtkWidget.

## Known Implementations

GtkFileChooser is implemented by GtkFileChooserWidget, GtkFileChooserButton and GtkFileChooserDialog.

## Properties

      "action"               GtkFileChooserAction  : Read / Write
      "do-overwrite-confirmation" gboolean              : Read / Write
      "extra-widget"         GtkWidget             : Read / Write
      "file-system-backend"  gchararray            : Write / Construct Only
      "filter"               GtkFileFilter         : Read / Write
      "local-only"           gboolean              : Read / Write
      "preview-widget"       GtkWidget             : Read / Write
      "preview-widget-active" gboolean              : Read / Write
      "select-multiple"      gboolean              : Read / Write
      "show-hidden"          gboolean              : Read / Write
      "use-preview-label"    gboolean              : Read / Write

## Signals

    "confirm-overwrite"
                GtkFileChooserConfirmation*user_function      (GtkFileChooser *filechooser,
                                                gpointer        user_data)        : Run last
    "current-folder-changed"
                void        user_function      (GtkFileChooser *chooser,
                                                gpointer        user_data)      : Run last
    "file-activated"
                void        user_function      (GtkFileChooser *chooser,
                                                gpointer        user_data)      : Run last
    "selection-changed"
                void        user_function      (GtkFileChooser *chooser,
                                                gpointer        user_data)      : Run last
    "update-preview"
                void        user_function      (GtkFileChooser *chooser,
                                                gpointer        user_data)      : Run last

## Description

GtkFileChooser is an interface that can be implemented by file selection widgets. In GTK+, the main objects that implement this interface are GtkFileChooserWidget, GtkFileChooserDialog, and GtkFileChooserButton. You do not need to write an object that implements the GtkFileChooser interface unless you are trying to adapt an existing file selector to expose a standard programming interface.

GtkFileChooser allows for shortcuts to various places in the filesystem. In the default implementation these are displayed in the left pane. It may be a bit confusing at first taht these shortcuts come from various sources and in various flavours, so lets explain the terminology here:

Bookmarks | are created by the user, by dragging folders from the right pane to the left pane, or by using the "Add". Bookmarks can be renamed and deleted by the user.
Shortcuts | can be provided by the application or by the underlying filesystem abstraction (e.g. both the gnome-vfs and the Windows filesystems provide "Desktop" shortcuts). Shortcuts cannot be modified by the user.
Volumes | are provided by the underlying filesystem abstraction. They are the "roots" of the filesystem.

### File Names and Encodings

When the user is finished selecting files in a GtkFileChooser, your program can get the selected names either as filenames or as URIs. For URIs, the normal escaping rules are applied if the URI contains non-ASCII characters. However, filenames are always returned in the character set specified by the `G_FILENAME_ENCODING` environment variable. Please see the Glib documentation for more details about this variable.

### Important

This means that while you can pass the result of `gtk_file_chooser_get_filename()` to `open(2)` or `fopen(3)`, you may not be able to directly set it as the text of a GtkLabel widget unless you convert it first to UTF-8, which all GTK+ widgets expect. You should use `g_filename_to_utf8()` to convert filenames into strings that can be passed to GTK+ widgets.

### Adding a Preview Widget

You can add a custom preview widget to a file chooser and then get notification about when the preview needs to be updated. To install a preview widget, use `gtk_file_chooser_set_preview_widget()`. Then, connect to the GtkFileChooser::update-preview signal to get notified when you need to update the contents of the preview.

Your callback should use `gtk_file_chooser_get_preview_filename()` to see what needs previewing. Once you have generated the preview for the corresponding file, you must call `gtk_file_chooser_set_preview_widget_active()` with a boolean flag that indicates whether your callback could successfully generate a preview.

Example 2. Sample Usage

    {
      GtkImage *preview;

      ...

      preview = gtk_image_new ();

      gtk_file_chooser_set_preview_widget (my_file_chooser, preview);
      g_signal_connect (my_file_chooser, "update-preview",
    		    G_CALLBACK (update_preview_cb), preview);
    }

    static void
    update_preview_cb (GtkFileChooser *file_chooser, gpointer data)
    {
      GtkWidget *preview;
      char *filename;
      GdkPixbuf *pixbuf;
      gboolean have_preview;

      preview = GTK_WIDGET (data);
      filename = gtk_file_chooser_get_preview_filename (file_chooser);

      pixbuf = gdk_pixbuf_new_from_file_at_size (filename, 128, 128, NULL);
      have_preview = (pixbuf != NULL);
      g_free (filename);

      gtk_image_set_from_pixbuf (GTK_IMAGE (preview), pixbuf);
      if (pixbuf)
        gdk_pixbuf_unref (pixbuf);

      gtk_file_chooser_set_preview_widget_active (file_chooser, have_preview);
    }

### Adding Extra Widgets

You can add extra widgets to a file chooser to provide options that are not present in the default design. For example, you can add a toggle button to give the user the option to open a file in read-only mode. You can use `gtk_file_chooser_set_extra_widget()` to insert additional widgets in a file chooser.

Example 3. Sample Usage

    {
      GtkWidget *toggle;

      ...

      toggle = gtk_check_button_new_with_label ("Open file read-only");
      gtk_widget_show (toggle);
      gtk_file_chooser_set_extra_widget (my_file_chooser, toggle);
    }

### Note

If you want to set more than one extra widget in the file chooser, you can a container such as a GtkVBox or a GtkTable and include your widgets in it. Then, set the container as the whole extra widget.

### Key Bindings

Internally, GTK+ implements a file chooser's graphical user interface with the private `GtkFileChooserDefaultClass`. This widget has several key bindings and their associated signals. This section describes the available key binding signals.

Example 4. GtkFileChooser key binding example

The default keys that activate the key-binding signals in `GtkFileChooserDefaultClass` are as follows:

Signal name | Default key combinations
location-popup | Control-L (empty path); / (path of "/")[a]; ~ (path of "~")
up-folder | Alt-Up[b] ; Backspace
down-folder | Alt-Down
home-folder | Alt-Home
[a] Both the individual / key and the numeric keypad's "divide" key are supported. [b] Both the individual Up key and the numeric keypad's Up key are supported.

You can change these defaults to something else. For example, to add a Shift modifier to a few of the default bindings, you can include the following fragment in your `.gtkrc-2.0` file:

    binding "my-own-gtkfilechooser-bindings" {
    	bind "<Alt><Shift>Up" {
    		"up-folder" ()
    	}
    	bind "<Alt><Shift>Down" {
    		"down-folder" ()
    	}
    	bind "<Alt><Shift>Home" {
    		"home-folder" ()
    	}
    }

    class "GtkFileChooserDefault" binding "my-own-gtkfilechooser-bindings"

#### The "GtkFileChooserDefault::location-popup" signal

              void user_function (GtkFileChooserDefault *chooser,
                                  const char            *path,
                                  gpointer user_data);

This is used to make the file chooser show a "Location" dialog which the user can use to manually type the name of the file he wishes to select. The `path` argument is a string that gets put in the text entry for the file name. By default this is bound to Control-L with a `path` string of "" (the empty string). It is also bound to / with a `path` string of "`/`" (a slash): this lets you type / and immediately type a path name. On Unix systems, this is bound to ~ (tilde) with a `path` string of "~" itself for access to home directories.

`chooser` : | the object which received the signal.
`path` : | default contents for the text entry for the file name
`user_data` : | user data set when the signal handler was connected.

### Tip

You can create your own bindings for the location-popup signal with custom `path` strings, and have a crude form of easily-to-type bookmarks. For example, say you access the path `/home/username/misc` very frequently. You could then create an Alt-M shortcut by including the following in your `.gtkrc-2.0`:

    binding "misc-shortcut" {
    	bind "<Alt>M" {
    		"location-popup" ("/home/username/misc")
    	}
    }

    class "GtkFileChooserDefault" binding "misc-shortcut"

#### The "GtkFileChooserDefault::up-folder" signal

              void user_function (GtkFileChooserDefault *chooser,
                                  gpointer user_data);

This is used to make the file chooser go to the parent of the current folder in the file hierarchy. By default this is bound to Backspace and Alt-Up (the Up key in the numeric keypad also works).

`chooser` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

#### The "GtkFileChooserDefault::down-folder" signal

              void user_function (GtkFileChooserDefault *chooser,
                                  gpointer user_data);

This is used to make the file chooser go to a child of the current folder in the file hierarchy. The subfolder that will be used is displayed in the path bar widget of the file chooser. For example, if the path bar is showing "/foo/bar/baz", then this will cause the file chooser to switch to the "baz" subfolder. By default this is bound to Alt-Down (the Down key in the numeric keypad also works).

`chooser` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

#### The "GtkFileChooserDefault::home-folder" signal

              void user_function (GtkFileChooserDefault *chooser,
                                  gpointer user_data);

This is used to make the file chooser show the user's home folder in the file list. By default this is bound to Alt-Home (the Home key in the numeric keypad also works).

`chooser` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

## Details

### GtkFileChooser

    typedef struct _GtkFileChooser GtkFileChooser;

### enum GtkFileChooserAction

    typedef enum
    {
      GTK_FILE_CHOOSER_ACTION_OPEN,
      GTK_FILE_CHOOSER_ACTION_SAVE,
      GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER,
      GTK_FILE_CHOOSER_ACTION_CREATE_FOLDER
    } GtkFileChooserAction;

Describes whether a GtkFileChooser is being used to open existing files or to save to a possibly new file.

`GTK_FILE_CHOOSER_ACTION_OPEN` | Indicates open mode. The file chooser will only let the user pick an existing file.
`GTK_FILE_CHOOSER_ACTION_SAVE` | Indicates save mode. The file chooser will let the user pick an existing file, or type in a new filename.
`GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER` | Indicates an Open mode for selecting folders. The file chooser will let the user pick an existing folder.
`GTK_FILE_CHOOSER_ACTION_CREATE_FOLDER` | Indicates a mode for creating a new folder. The file chooser will let the user name an existing or new folder.

### enum GtkFileChooserConfirmation

    typedef enum
    {
      GTK_FILE_CHOOSER_CONFIRMATION_CONFIRM,
      GTK_FILE_CHOOSER_CONFIRMATION_ACCEPT_FILENAME,
      GTK_FILE_CHOOSER_CONFIRMATION_SELECT_AGAIN
    } GtkFileChooserConfirmation;

Used as a return value of handlers for the confirm-overwrite signal of a `GtkFileChooser`. This value determines whether the file chooser will present the stock confirmation dialog, accept the user's choice of a filename, or let the user choose another filename.

`GTK_FILE_CHOOSER_CONFIRMATION_CONFIRM` | The file chooser will present its stock dialog to confirm about overwriting an existing file.
`GTK_FILE_CHOOSER_CONFIRMATION_ACCEPT_FILENAME` | The file chooser will terminate and accept the user's choice of a file name.
`GTK_FILE_CHOOSER_CONFIRMATION_SELECT_AGAIN` | The file chooser will continue running, so as to let the user select another file name. Since 2.8

### GTK_FILE_CHOOSER_ERROR

    #define GTK_FILE_CHOOSER_ERROR (gtk_file_chooser_error_quark ())

Used to get the GError quark for GtkFileChooser errors.

### enum GtkFileChooserError

    typedef enum {
      GTK_FILE_CHOOSER_ERROR_NONEXISTENT,
      GTK_FILE_CHOOSER_ERROR_BAD_FILENAME
    } GtkFileChooserError;

These identify the various errors that can occur while calling GtkFileChooser functions.

`GTK_FILE_CHOOSER_ERROR_NONEXISTENT` | Indicates that a file does not exist.
`GTK_FILE_CHOOSER_ERROR_BAD_FILENAME` | Indicates a malformed filename.

### gtk_file_chooser_error_quark ()

    GQuark      gtk_file_chooser_error_quark    (void);

Registers an error quark for GtkFileChooser if necessary.

Returns : | The error quark used for GtkFileChooser errors.

Since 2.4

### gtk_file_chooser_set_action ()

    void        gtk_file_chooser_set_action     (GtkFileChooser *chooser,
                                                 GtkFileChooserAction action);

Sets the type of operation that the chooser is performing; the user interface is adapted to suit the selected action. For example, an option to create a new folder might be shown if the action is `GTK_FILE_CHOOSER_ACTION_SAVE` but not if the action is `GTK_FILE_CHOOSER_ACTION_OPEN`.

`chooser` : | a GtkFileChooser
`action` : | the action that the file selector is performing

Since 2.4

### gtk_file_chooser_get_action ()

    GtkFileChooserAction gtk_file_chooser_get_action
                                                (GtkFileChooser *chooser);

Gets the type of operation that the file chooser is performing; see `gtk_file_chooser_set_action()`.

`chooser` : | a GtkFileChooser
Returns : | the action that the file selector is performing

Since 2.4

### gtk_file_chooser_set_local_only ()

    void        gtk_file_chooser_set_local_only (GtkFileChooser *chooser,
                                                 gboolean local_only);

Sets whether only local files can be selected in the file selector. If `local_only` is `TRUE` (the default), then the selected file are files are guaranteed to be accessible through the operating systems native file file system and therefore the application only needs to worry about the filename functions in GtkFileChooser, like `gtk_file_chooser_get_filename()`, rather than the URI functions like `gtk_file_chooser_get_uri()`,

`chooser` : | a GtkFileChooser
`local_only` : | `TRUE` if only local files can be selected

Since 2.4

### gtk_file_chooser_get_local_only ()

    gboolean    gtk_file_chooser_get_local_only (GtkFileChooser *chooser);

Gets whether only local files can be selected in the file selector. See `gtk_file_chooser_set_local_only()`

`chooser` : | a GtkFileChoosre
Returns : | `TRUE` if only local files can be selected.

Since 2.4

### gtk_file_chooser_set_select_multiple ()

    void        gtk_file_chooser_set_select_multiple
                                                (GtkFileChooser *chooser,
                                                 gboolean select_multiple);

Sets whether multiple files can be selected in the file selector. This is only relevant if the action is set to be GTK_FILE_CHOOSER_ACTION_OPEN or GTK_FILE_CHOOSER_ACTION_SAVE. It cannot be set with either of the folder actions.

`chooser` : | a GtkFileChooser
`select_multiple` : | `TRUE` if multiple files can be selected.

Since 2.4

### gtk_file_chooser_get_select_multiple ()

    gboolean    gtk_file_chooser_get_select_multiple
                                                (GtkFileChooser *chooser);

Gets whether multiple files can be selected in the file selector. See `gtk_file_chooser_set_select_multiple()`.

`chooser` : | a GtkFileChooser
Returns : | `TRUE` if multiple files can be selected.

Since 2.4

### gtk_file_chooser_set_show_hidden ()

    void        gtk_file_chooser_set_show_hidden
                                                (GtkFileChooser *chooser,
                                                 gboolean show_hidden);

Sets whether hidden files and folders are displayed in the file selector.

`chooser` : | a GtkFileChooser
`show_hidden` : | `TRUE` if hidden files and folders should be displayed.

Since 2.6

### gtk_file_chooser_get_show_hidden ()

    gboolean    gtk_file_chooser_get_show_hidden
                                                (GtkFileChooser *chooser);

Gets whether hidden files and folders are displayed in the file selector. See `gtk_file_chooser_set_show_hidden()`.

`chooser` : | a GtkFileChooser
Returns : | `TRUE` if hidden files and folders are displayed.

Since 2.6

### gtk_file_chooser_set_do_overwrite_confirmation ()

    void        gtk_file_chooser_set_do_overwrite_confirmation
                                                (GtkFileChooser *chooser,
                                                 gboolean do_overwrite_confirmation);

Sets whether a file chooser in GTK_FILE_CHOOSER_ACTION_SAVE mode will present a confirmation dialog if the user types a file name that already exists. This is `FALSE` by default.

Regardless of this setting, the `chooser` will emit the "confirm-overwrite" signal when appropriate.

If all you need is the stock confirmation dialog, set this property to `TRUE`. You can override the way confirmation is done by actually handling the "confirm-overwrite" signal; please refer to its documentation for the details.

`chooser` : | a GtkFileChooser
`do_overwrite_confirmation` : | whether to confirm overwriting in save mode

Since 2.8

### gtk_file_chooser_get_do_overwrite_confirmation ()

    gboolean    gtk_file_chooser_get_do_overwrite_confirmation
                                                (GtkFileChooser *chooser);

Queries whether a file chooser is set to confirm for overwriting when the user types a file name that already exists.

`chooser` : | a GtkFileChooser
Returns : | `TRUE` if the file chooser will present a confirmation dialog; `FALSE` otherwise.

Since 2.8

### gtk_file_chooser_set_current_name ()

    void        gtk_file_chooser_set_current_name
                                                (GtkFileChooser *chooser,
                                                 const gchar *name);

Sets the current name in the file selector, as if entered by the user. Note that the name passed in here is a UTF-8 string rather than a filename. This function is meant for such uses as a suggested name in a "Save As..." dialog.

If you want to preselect a particular existing file, you should use `gtk_file_chooser_set_filename()` or `gtk_file_chooser_set_uri()` instead. Please see the documentation for those functions for an example of using `gtk_file_chooser_set_current_name()` as well.

`chooser` : | a GtkFileChooser
`name` : | the filename to use, as a UTF-8 string

Since 2.4

### gtk_file_chooser_get_filename ()

    gchar*      gtk_file_chooser_get_filename   (GtkFileChooser *chooser);

Gets the filename for the currently selected file in the file selector. If multiple files are selected, one of the filenames will be returned at random.

If the file chooser is in folder mode, this function returns the selected folder.

`chooser` : | a GtkFileChooser
Returns : | The currently selected filename, or `NULL` if no file is selected, or the selected file can't be represented with a local filename. Free with `g_free()`.

Since 2.4

### gtk_file_chooser_set_filename ()

    gboolean    gtk_file_chooser_set_filename   (GtkFileChooser *chooser,
                                                 const char *filename);

Sets `filename` as the current filename for the file chooser, by changing to the file's parent folder and actually selecting the file in list. If the `chooser` is in GTK_FILE_CHOOSER_ACTION_SAVE mode, the file's base name will also appear in the dialog's file name entry.

If the file name isn't in the current folder of `chooser`, then the current folder of `chooser` will be changed to the folder containing `filename`. This is equivalent to a sequence of `gtk_file_chooser_unselect_all()` followed by `gtk_file_chooser_select_filename()`.

Note that the file must exist, or nothing will be done except for the directory change.

If you are implementing a File/Save As... dialog, you should use this function if you already have a file name to which the user may save; for example, when the user opens an existing file and then does File/Save As... on it. If you don't have a file name already — for example, if the user just created a new file and is saving it for the first time, do not call this function. Instead, use something similar to this:

    if (document_is_new)
      {
        /* the user just created a new document */
        gtk_file_chooser_set_current_folder (chooser, default_folder_for_saving);
        gtk_file_chooser_set_current_name (chooser, "Untitled document");
      }
    else
      {
        /* the user edited an existing document */
        gtk_file_chooser_set_filename (chooser, existing_filename);
      }

`chooser` : | a GtkFileChooser
`filename` : | the filename to set as current
Returns : | `TRUE` if both the folder could be changed and the file was selected successfully, `FALSE` otherwise.

Since 2.4

### gtk_file_chooser_select_filename ()

    gboolean    gtk_file_chooser_select_filename
                                                (GtkFileChooser *chooser,
                                                 const char *filename);

Selects a filename. If the file name isn't in the current folder of `chooser`, then the current folder of `chooser` will be changed to the folder containing `filename`.

`chooser` : | a GtkFileChooser
`filename` : | the filename to select
Returns : | `TRUE` if both the folder could be changed and the file was selected successfully, `FALSE` otherwise.

Since 2.4

### gtk_file_chooser_unselect_filename ()

    void        gtk_file_chooser_unselect_filename
                                                (GtkFileChooser *chooser,
                                                 const char *filename);

Unselects a currently selected filename. If the filename is not in the current directory, does not exist, or is otherwise not currently selected, does nothing.

`chooser` : | a GtkFileChooser
`filename` : | the filename to unselect

Since 2.4

### gtk_file_chooser_select_all ()

    void        gtk_file_chooser_select_all     (GtkFileChooser *chooser);

Selects all the files in the current folder of a file chooser.

`chooser` : | a GtkFileChooser

Since 2.4

### gtk_file_chooser_unselect_all ()

    void        gtk_file_chooser_unselect_all   (GtkFileChooser *chooser);

Unselects all the files in the current folder of a file chooser.

`chooser` : | a GtkFileChooser

Since 2.4

### gtk_file_chooser_get_filenames ()

    GSList*     gtk_file_chooser_get_filenames  (GtkFileChooser *chooser);

Lists all the selected files and subfolders in the current folder of `chooser`. The returned names are full absolute paths. If files in the current folder cannot be represented as local filenames they will be ignored. (See `gtk_file_chooser_get_uris()`)

`chooser` : | a GtkFileChooser
Returns : | a GSList containing the filenames of all selected files and subfolders in the current folder. Free the returned list with `g_slist_free()`, and the filenames with `g_free()`.

Since 2.4

### gtk_file_chooser_set_current_folder ()

    gboolean    gtk_file_chooser_set_current_folder
                                                (GtkFileChooser *chooser,
                                                 const gchar *filename);

Sets the current folder for `chooser` from a local filename. The user will be shown the full contents of the current folder, plus user interface elements for navigating to other folders.

`chooser` : | a GtkFileChooser
`filename` : | the full path of the new current folder
Returns : | `TRUE` if the folder could be changed successfully, `FALSE` otherwise.

Since 2.4

### gtk_file_chooser_get_current_folder ()

    gchar*      gtk_file_chooser_get_current_folder
                                                (GtkFileChooser *chooser);

Gets the current folder of `chooser` as a local filename. See `gtk_file_chooser_set_current_folder()`.

`chooser` : | a GtkFileChooser
Returns : | the full path of the current folder, or `NULL` if the current path cannot be represented as a local filename. Free with `g_free()`. This function will also return `NULL` if the file chooser was unable to load the last folder that was requested from it; for example, as would be for calling `gtk_file_chooser_set_current_folder()` on a nonexistent folder.

Since 2.4

### gtk_file_chooser_get_uri ()

    gchar*      gtk_file_chooser_get_uri        (GtkFileChooser *chooser);

Gets the URI for the currently selected file in the file selector. If multiple files are selected, one of the filenames will be returned at random.

If the file chooser is in folder mode, this function returns the selected folder.

`chooser` : | a GtkFileChooser
Returns : | The currently selected URI, or `NULL` if no file is selected. Free with `g_free()`

Since 2.4

### gtk_file_chooser_set_uri ()

    gboolean    gtk_file_chooser_set_uri        (GtkFileChooser *chooser,
                                                 const char *uri);

Sets the file referred to by `uri` as the current file for the file chooser, by changing to the URI's parent folder and actually selecting the URI in the list. If the `chooser` is GTK_FILE_CHOOSER_ACTION_SAVE mode, the URI's base name will also appear in the dialog's file name entry.

If the URI isn't in the current folder of `chooser`, then the current folder of `chooser` will be changed to the folder containing `uri`. This is equivalent to a sequence of `gtk_file_chooser_unselect_all()` followed by `gtk_file_chooser_select_uri()`.

Note that the URI must exist, or nothing will be done except for the directory change. If you are implementing a File/Save As... dialog, you should use this function if you already have a file name to which the user may save; for example, when the user opens an existing file and then does File/Save As... on it. If you don't have a file name already — for example, if the user just created a new file and is saving it for the first time, do not call this function. Instead, use something similar to this:

    if (document_is_new)
      {
        /* the user just created a new document */
        gtk_file_chooser_set_current_folder_uri (chooser, default_folder_for_saving);
        gtk_file_chooser_set_current_name (chooser, "Untitled document");
      }
    else
      {
        /* the user edited an existing document */
        gtk_file_chooser_set_uri (chooser, existing_uri);
      }

`chooser` : | a GtkFileChooser
`uri` : | the URI to set as current
Returns : | `TRUE` if both the folder could be changed and the URI was selected successfully, `FALSE` otherwise.

Since 2.4

### gtk_file_chooser_select_uri ()

    gboolean    gtk_file_chooser_select_uri     (GtkFileChooser *chooser,
                                                 const char *uri);

Selects the file to by `uri`. If the URI doesn't refer to a file in the current folder of `chooser`, then the current folder of `chooser` will be changed to the folder containing `filename`.

`chooser` : | a GtkFileChooser
`uri` : | the URI to select
Returns : | `TRUE` if both the folder could be changed and the URI was selected successfully, `FALSE` otherwise.

Since 2.4

### gtk_file_chooser_unselect_uri ()

    void        gtk_file_chooser_unselect_uri   (GtkFileChooser *chooser,
                                                 const char *uri);

Unselects the file referred to by `uri`. If the file is not in the current directory, does not exist, or is otherwise not currently selected, does nothing.

`chooser` : | a GtkFileChooser
`uri` : | the URI to unselect

Since 2.4

### gtk_file_chooser_get_uris ()

    GSList*     gtk_file_chooser_get_uris       (GtkFileChooser *chooser);

Lists all the selected files and subfolders in the current folder of `chooser`. The returned names are full absolute URIs.

`chooser` : | a GtkFileChooser
Returns : | a GSList containing the URIs of all selected files and subfolders in the current folder. Free the returned list with `g_slist_free()`, and the filenames with `g_free()`.

Since 2.4

### gtk_file_chooser_set_current_folder_uri ()

    gboolean    gtk_file_chooser_set_current_folder_uri
                                                (GtkFileChooser *chooser,
                                                 const gchar *uri);

Sets the current folder for `chooser` from an URI. The user will be shown the full contents of the current folder, plus user interface elements for navigating to other folders.

`chooser` : | a GtkFileChooser
`uri` : | the URI for the new current folder
Returns : | `TRUE` if the folder could be changed successfully, `FALSE` otherwise.

Since 2.4

### gtk_file_chooser_get_current_folder_uri ()

    gchar*      gtk_file_chooser_get_current_folder_uri
                                                (GtkFileChooser *chooser);

Gets the current folder of `chooser` as an URI. See `gtk_file_chooser_set_current_folder_uri()`.

`chooser` : | a GtkFileChooser
Returns : | the URI for the current folder. Free with `g_free()`. This function will also return `NULL` if the file chooser was unable to load the last folder that was requested from it; for example, as would be for calling `gtk_file_chooser_set_current_folder_uri()` on a nonexistent folder.

Since 2.4

### gtk_file_chooser_set_preview_widget ()

    void        gtk_file_chooser_set_preview_widget
                                                (GtkFileChooser *chooser,
                                                 GtkWidget *preview_widget);

Sets an application-supplied widget to use to display a custom preview of the currently selected file. To implement a preview, after setting the preview widget, you connect to the ::update-preview signal, and call `gtk_file_chooser_get_preview_filename()` or `gtk_file_chooser_get_preview_uri()` on each change. If you can display a preview of the new file, update your widget and set the preview active using `gtk_file_chooser_set_preview_widget_active()`. Otherwise, set the preview inactive.

When there is no application-supplied preview widget, or the application-supplied preview widget is not active, the file chooser may display an internally generated preview of the current file or it may display no preview at all.

`chooser` : | a GtkFileChooser
`preview_widget` : | widget for displaying preview.

Since 2.4

### gtk_file_chooser_get_preview_widget ()

    GtkWidget*  gtk_file_chooser_get_preview_widget
                                                (GtkFileChooser *chooser);

Gets the current preview widget; see `gtk_file_chooser_set_preview_widget()`.

`chooser` : | a GtkFileChooser
Returns : | the current preview widget, or `NULL`

Since 2.4

### gtk_file_chooser_set_preview_widget_active ()

    void        gtk_file_chooser_set_preview_widget_active
                                                (GtkFileChooser *chooser,
                                                 gboolean active);

Sets whether the preview widget set by `gtk_file_chooser_set_preview_widget()` should be shown for the current filename. When `active` is set to false, the file chooser may display an internally generated preview of the current file or it may display no preview at all. See `gtk_file_chooser_set_preview_widget()` for more details.

`chooser` : | a GtkFileChooser
`active` : | whether to display the user-specified preview widget

Since 2.4

### gtk_file_chooser_get_preview_widget_active ()

    gboolean    gtk_file_chooser_get_preview_widget_active
                                                (GtkFileChooser *chooser);

Gets whether the preview widget set by `gtk_file_chooser_set_preview_widget()` should be shown for the current filename. See `gtk_file_chooser_set_preview_widget_active()`.

`chooser` : | a GtkFileChooser
Returns : | `TRUE` if the preview widget is active for the current filename.

Since 2.4

### gtk_file_chooser_set_use_preview_label ()

    void        gtk_file_chooser_set_use_preview_label
                                                (GtkFileChooser *chooser,
                                                 gboolean use_label);

Sets whether the file chooser should display a stock label with the name of the file that is being previewed; the default is `TRUE`. Applications that want to draw the whole preview area themselves should set this to `FALSE` and display the name themselves in their preview widget.

See also: `gtk_file_chooser_set_preview_widget()`

`chooser` : | a GtkFileChooser
`use_label` : | whether to display a stock label with the name of the previewed file

Since 2.4

### gtk_file_chooser_get_use_preview_label ()

    gboolean    gtk_file_chooser_get_use_preview_label
                                                (GtkFileChooser *chooser);

Gets whether a stock label should be drawn with the name of the previewed file. See `gtk_file_chooser_set_use_preview_label()`.

`chooser` : | a GtkFileChooser
Returns : | `TRUE` if the file chooser is set to display a label with the name of the previewed file, `FALSE` otherwise.

### gtk_file_chooser_get_preview_filename ()

    char*       gtk_file_chooser_get_preview_filename
                                                (GtkFileChooser *chooser);

Gets the filename that should be previewed in a custom preview widget. See `gtk_file_chooser_set_preview_widget()`.

`chooser` : | a GtkFileChooser
Returns : | the filename to preview, or `NULL` if no file is selected, or if the selected file cannot be represented as a local filename. Free with `g_free()`

Since 2.4

### gtk_file_chooser_get_preview_uri ()

    char*       gtk_file_chooser_get_preview_uri
                                                (GtkFileChooser *chooser);

Gets the URI that should be previewed in a custom preview widget. See `gtk_file_chooser_set_preview_widget()`.

`chooser` : | a GtkFileChooser
Returns : | the URI for the file to preview, or `NULL` if no file is selected. Free with `g_free()`.

Since 2.4

### gtk_file_chooser_set_extra_widget ()

    void        gtk_file_chooser_set_extra_widget
                                                (GtkFileChooser *chooser,
                                                 GtkWidget *extra_widget);

Sets an application-supplied widget to provide extra options to the user.

`chooser` : | a GtkFileChooser
`extra_widget` : | widget for extra options

Since 2.4

### gtk_file_chooser_get_extra_widget ()

    GtkWidget*  gtk_file_chooser_get_extra_widget
                                                (GtkFileChooser *chooser);

Gets the current preview widget; see `gtk_file_chooser_set_extra_widget()`.

`chooser` : | a GtkFileChooser
Returns : | the current extra widget, or `NULL`

Since 2.4

### gtk_file_chooser_add_filter ()

    void        gtk_file_chooser_add_filter     (GtkFileChooser *chooser,
                                                 GtkFileFilter *filter);

Adds `filter` to the list of filters that the user can select between. When a filter is selected, only files that are passed by that filter are displayed.

Note that the `chooser` takes ownership of the filter, so you have to ref and sink it if you want to keep a reference.

`chooser` : | a GtkFileChooser
`filter` : | a GtkFileFilter

Since 2.4

### gtk_file_chooser_remove_filter ()

    void        gtk_file_chooser_remove_filter  (GtkFileChooser *chooser,
                                                 GtkFileFilter *filter);

Removes `filter` from the list of filters that the user can select between.

`chooser` : | a GtkFileChooser
`filter` : | a GtkFileFilter

Since 2.4

### gtk_file_chooser_list_filters ()

    GSList*     gtk_file_chooser_list_filters   (GtkFileChooser *chooser);

Lists the current set of user-selectable filters; see `gtk_file_chooser_add_filter()`, `gtk_file_chooser_remove_filter()`.

`chooser` : | a GtkFileChooser
Returns : | a GSList containing the current set of user selectable filters. The contents of the list are owned by GTK+, but you must free the list itself with `g_slist_free()` when you are done with it.

Since 2.4

### gtk_file_chooser_set_filter ()

    void        gtk_file_chooser_set_filter     (GtkFileChooser *chooser,
                                                 GtkFileFilter *filter);

Sets the current filter; only the files that pass the filter will be displayed. If the user-selectable list of filters is non-empty, then the filter should be one of the filters in that list. Setting the current filter when the list of filters is empty is useful if you want to restrict the displayed set of files without letting the user change it.

`chooser` : | a GtkFileChooser
`filter` : | a GtkFileFilter

Since 2.4

### gtk_file_chooser_get_filter ()

    GtkFileFilter* gtk_file_chooser_get_filter  (GtkFileChooser *chooser);

Gets the current filter; see `gtk_file_chooser_set_filter()`.

`chooser` : | a GtkFileChooser
Returns : | the current filter, or `NULL`

Since 2.4

### gtk_file_chooser_add_shortcut_folder ()

    gboolean    gtk_file_chooser_add_shortcut_folder
                                                (GtkFileChooser *chooser,
                                                 const char *folder,
                                                 GError **error);

Adds a folder to be displayed with the shortcut folders in a file chooser. Note that shortcut folders do not get saved, as they are provided by the application. For example, you can use this to add a "/usr/share/mydrawprogram/Clipart" folder to the volume list.

`chooser` : | a GtkFileChooser
`folder` : | filename of the folder to add
`error` : | location to store error, or `NULL`
Returns : | `TRUE` if the folder could be added successfully, `FALSE` otherwise. In the latter case, the `error` will be set as appropriate.

Since 2.4

### gtk_file_chooser_remove_shortcut_folder ()

    gboolean    gtk_file_chooser_remove_shortcut_folder
                                                (GtkFileChooser *chooser,
                                                 const char *folder,
                                                 GError **error);

Removes a folder from a file chooser's list of shortcut folders.

`chooser` : | a GtkFileChooser
`folder` : | filename of the folder to remove
`error` : | location to store error, or `NULL`
Returns : | `TRUE` if the operation succeeds, `FALSE` otherwise. In the latter case, the `error` will be set as appropriate. See also: `gtk_file_chooser_add_shortcut_folder()`

Since 2.4

### gtk_file_chooser_list_shortcut_folders ()

    GSList*     gtk_file_chooser_list_shortcut_folders
                                                (GtkFileChooser *chooser);

Queries the list of shortcut folders in the file chooser, as set by `gtk_file_chooser_add_shortcut_folder()`.

`chooser` : | a GtkFileChooser
Returns : | A list of folder filenames, or `NULL` if there are no shortcut folders. Free the returned list with `g_slist_free()`, and the filenames with `g_free()`.

Since 2.4

### gtk_file_chooser_add_shortcut_folder_uri ()

    gboolean    gtk_file_chooser_add_shortcut_folder_uri
                                                (GtkFileChooser *chooser,
                                                 const char *uri,
                                                 GError **error);

Adds a folder URI to be displayed with the shortcut folders in a file chooser. Note that shortcut folders do not get saved, as they are provided by the application. For example, you can use this to add a "file:///usr/share/mydrawprogram/Clipart" folder to the volume list.

`chooser` : | a GtkFileChooser
`uri` : | URI of the folder to add
`error` : | location to store error, or `NULL`
Returns : | `TRUE` if the folder could be added successfully, `FALSE` otherwise. In the latter case, the `error` will be set as appropriate.

Since 2.4

### gtk_file_chooser_remove_shortcut_folder_uri ()

    gboolean    gtk_file_chooser_remove_shortcut_folder_uri
                                                (GtkFileChooser *chooser,
                                                 const char *uri,
                                                 GError **error);

Removes a folder URI from a file chooser's list of shortcut folders.

`chooser` : | a GtkFileChooser
`uri` : | URI of the folder to remove
`error` : | location to store error, or `NULL`
Returns : | `TRUE` if the operation succeeds, `FALSE` otherwise. In the latter case, the `error` will be set as appropriate. See also: `gtk_file_chooser_add_shortcut_folder_uri()`

Since 2.4

### gtk_file_chooser_list_shortcut_folder_uris ()

    GSList*     gtk_file_chooser_list_shortcut_folder_uris
                                                (GtkFileChooser *chooser);

Queries the list of shortcut folders in the file chooser, as set by `gtk_file_chooser_add_shortcut_folder_uri()`.

`chooser` : | a GtkFileChooser
Returns : | A list of folder URIs, or `NULL` if there are no shortcut folders. Free the returned list with `g_slist_free()`, and the URIs with `g_free()`.

Since 2.4

## Property Details

### The "`action`" property

      "action"               GtkFileChooserAction  : Read / Write

The type of operation that the file selector is performing.

Default value: GTK_FILE_CHOOSER_ACTION_OPEN

### The "`do-overwrite-confirmation`" property

      "do-overwrite-confirmation" gboolean              : Read / Write

Whether a file chooser in GTK_FILE_CHOOSER_ACTION_SAVE will present an overwrite confirmation dialog if the user selects a file name that already exists.

Default value: FALSE

Since 2.8

### The "`extra-widget`" property

      "extra-widget"         GtkWidget             : Read / Write

Application supplied widget for extra options.

### The "`file-system-backend`" property

      "file-system-backend"  gchararray            : Write / Construct Only

Name of file system backend to use.

Default value: NULL

### The "`filter`" property

      "filter"               GtkFileFilter         : Read / Write

The current filter for selecting which files are displayed.

### The "`local-only`" property

      "local-only"           gboolean              : Read / Write

Whether the selected file(s) should be limited to local file: URLs.

Default value: TRUE

### The "`preview-widget`" property

      "preview-widget"       GtkWidget             : Read / Write

Application supplied widget for custom previews.

### The "`preview-widget-active`" property

      "preview-widget-active" gboolean              : Read / Write

Whether the application supplied widget for custom previews should be shown.

Default value: TRUE

### The "`select-multiple`" property

      "select-multiple"      gboolean              : Read / Write

Whether to allow multiple files to be selected.

Default value: FALSE

### The "`show-hidden`" property

      "show-hidden"          gboolean              : Read / Write

Whether the hidden files and folders should be displayed.

Default value: FALSE

### The "`use-preview-label`" property

      "use-preview-label"    gboolean              : Read / Write

Whether to display a stock label with the name of the previewed file.

Default value: TRUE

## Signal Details

### The "confirm-overwrite" signal

    GtkFileChooserConfirmation*user_function                  (GtkFileChooser *filechooser,
                                                gpointer        user_data)        : Run last

This signal gets emitted whenever it is appropriate to present a confirmation dialog when the user has selected a file name that already exists. The signal only gets emitted when the file chooser is in GTK_FILE_CHOOSER_ACTION_SAVE mode.

Most applications just need to turn on the do-overwrite-confirmation property (or call the `gtk_file_chooser_set_do_overwrite_confirmation()` function), and they will automatically get a stock confirmation dialog. Applications which need to customize this behavior should do that, and also connect to the confirm-overwrite signal.

A signal handler for this signal must return a GtkFileChooserConfirmation value, which indicates the action to take. If the handler determines that the user wants to select a different filename, it should return GTK_FILE_CHOOSER_CONFIRMATION_SELECT_AGAIN. If it determines that the user is satisfied with his choice of file name, it should return GTK_FILE_CHOOSER_CONFIRMATION_ACCEPT_FILENAME. On the other hand, if it determines that the stock confirmation dialog should be used, it should return GTK_FILE_CHOOSER_CONFIRMATION_CONFIRM. The following example illustrates this.

Example 5. Custom confirmation

    static GtkFileChooserConfirmation
    confirm_overwrite_callback (GtkFileChooser *chooser, gpointer data)
    {
      char *uri;

      uri = gtk_file_chooser_get_uri (chooser);

      if (is_uri_read_only (uri))
        {
          if (user_wants_to_replace_read_only_file (uri))
            return GTK_FILE_CHOOSER_CONFIRMATION_ACCEPT_FILENAME;
          else
            return GTK_FILE_CHOOSER_CONFIRMATION_SELECT_AGAIN;
        } else
          return GTK_FILE_CHOOSER_CONFIRMATION_CONFIRM; /* fall back to the default dialog */
    }

    ...

    chooser = gtk_file_chooser_dialog_new (...);

    gtk_file_chooser_set_do_overwrite_confirmation (GTK_FILE_CHOOSER (dialog), TRUE);
    g_signal_connect (chooser, "confirm-overwrite",
                      G_CALLBACK (confirm_overwrite_callback), NULL);

    if (gtk_dialog_run (chooser) == GTK_RESPONSE_ACCEPT)
            save_to_file (gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (chooser));

    gtk_widget_destroy (chooser);

`filechooser` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.
Returns : | GtkFileChooserConfirmation value that indicates which action to take after emitting the signal. Since 2.8

### The "current-folder-changed" signal

    void        user_function                  (GtkFileChooser *chooser,
                                                gpointer        user_data)      : Run last

This signal is emitted when the current folder in a GtkFileChooser changes. This can happen due to the user performing some action that changes folders, such as selecting a bookmark or visiting a folder on the file list. It can also happen as a result of calling a function to explicitly change the current folder in a file chooser.

Normally you do not need to connect to this signal, unless you need to keep track of which folder a file chooser is showing.

See also: `gtk_file_chooser_set_current_folder()`, `gtk_file_chooser_get_current_folder()`, `gtk_file_chooser_set_current_folder_uri()`, `gtk_file_chooser_get_current_folder_uri()`.

`chooser` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "file-activated" signal

    void        user_function                  (GtkFileChooser *chooser,
                                                gpointer        user_data)      : Run last

This signal is emitted when the user "activates" a file in the file chooser. This can happen by double-clicking on a file in the file list, or by pressing Enter.

Normally you do not need to connect to this signal. It is used internally by GtkFileChooserDialog to know when to activate the default button in the dialog.

See also: `gtk_file_chooser_get_filename()`, `gtk_file_chooser_get_filenames()`, `gtk_file_chooser_get_uri()`, `gtk_file_chooser_get_uris()`.

`chooser` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "selection-changed" signal

    void        user_function                  (GtkFileChooser *chooser,
                                                gpointer        user_data)      : Run last

This signal is emitted when there is a change in the set of selected files in a GtkFileChooser. This can happen when the user modifies the selection with the mouse or the keyboard, or when explicitly calling functions to change the selection.

Normally you do not need to connect to this signal, as it is easier to wait for the file chooser to finish running, and then to get the list of selected files using the functions mentioned below.

See also: `gtk_file_chooser_select_filename()`, `gtk_file_chooser_unselect_filename()`, `gtk_file_chooser_get_filename()`, `gtk_file_chooser_get_filenames()`, `gtk_file_chooser_select_uri()`, `gtk_file_chooser_unselect_uri()`, `gtk_file_chooser_get_uri()`, `gtk_file_chooser_get_uris()`.

`chooser` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "update-preview" signal

    void        user_function                  (GtkFileChooser *chooser,
                                                gpointer        user_data)      : Run last

This signal is emitted when the preview in a file chooser should be regenerated. For example, this can happen when the currently selected file changes. You should use this signal if you want your file chooser to have a preview widget.

Once you have installed a preview widget with `gtk_file_chooser_set_preview_widget()`, you should update it when this signal is emitted. You can use the functions `gtk_file_chooser_get_preview_filename()` or `gtk_file_chooser_get_preview_uri()` to get the name of the file to preview. Your widget may not be able to preview all kinds of files; your callback must call `gtk_file_chooser_set_preview_wiget_active()` to inform the file chooser about whether the preview was generated successfully or not.

Please see the example code in the section called “Adding a Preview Widget”.

See also: `gtk_file_chooser_set_preview_widget()`, `gtk_file_chooser_set_preview_widget_active()`, `gtk_file_chooser_set_use_preview_label()`, `gtk_file_chooser_get_preview_filename()`, `gtk_file_chooser_get_preview_uri()`.

`chooser` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

## See Also

GtkFileChooserDialog, GtkFileChooserWidget, GtkFileChooserButton