GI.Gtk.Objects.FileChooserNative

FileChooserNative is an abstraction of a dialog box suitable for use with “File/Open” or “File/Save as” commands. By default, this just uses a FileChooserDialog to implement the actual dialog. However, on certain platforms, such as Windows and macOS, the native platform file chooser is used instead. When the application is running in a sandboxed environment without direct filesystem access (such as Flatpak), FileChooserNative may call the proper APIs (portals) to let the user choose a file and make it available to the application.

While the API of FileChooserNative closely mirrors FileChooserDialog, the main difference is that there is no access to any Window or Widget for the dialog. This is required, as there may not be one in the case of a platform native dialog. Showing, hiding and running the dialog is handled by the NativeDialog functions.

## {gtkfilechoosernative-typical-usage}

In the simplest of cases, you can the following code to use FileChooserDialog to select a file for opening:

GtkFileChooserNative *native;
GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_OPEN;
gint res;

native = gtk_file_chooser_native_new ("Open File",
                                      parent_window,
                                      action,
                                      "_Open",
                                      "_Cancel");

res = gtk_native_dialog_run (GTK_NATIVE_DIALOG (native));
if (res == GTK_RESPONSE_ACCEPT)
  {
    char *filename;
    GtkFileChooser *chooser = GTK_FILE_CHOOSER (native);
    filename = gtk_file_chooser_get_filename (chooser);
    open_file (filename);
    g_free (filename);
  }

g_object_unref (native);

To use a dialog for saving, you can use this:

GtkFileChooserNative *native;
GtkFileChooser *chooser;
GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_SAVE;
gint res;

native = gtk_file_chooser_native_new ("Save File",
                                      parent_window,
                                      action,
                                      "_Save",
                                      "_Cancel");
chooser = GTK_FILE_CHOOSER (native);

gtk_file_chooser_set_do_overwrite_confirmation (chooser, TRUE);

if (user_edited_a_new_document)
  gtk_file_chooser_set_current_name (chooser,
                                     _("Untitled document"));
else
  gtk_file_chooser_set_filename (chooser,
                                 existing_filename);

res = gtk_native_dialog_run (GTK_NATIVE_DIALOG (native));
if (res == GTK_RESPONSE_ACCEPT)
  {
    char *filename;

    filename = gtk_file_chooser_get_filename (chooser);
    save_to_file (filename);
    g_free (filename);
  }

g_object_unref (native);

For more information on how to best set up a file dialog, see FileChooserDialog.

## {gtkfilechooserdialognative-responses}

FileChooserNative inherits from NativeDialog, which means it will return GTK_RESPONSE_ACCEPT if the user accepted, and GTK_RESPONSE_CANCEL if he pressed cancel. It can also return GTK_RESPONSE_DELETE_EVENT if the window was unexpectedly closed.

## {gtkfilechooserdialognative-differences}

There are a few things in the GtkFileChooser API that are not possible to use with FileChooserNative, as such use would prohibit the use of a native dialog.

There is no support for the signals that are emitted when the user navigates in the dialog, including: * currentFolderChanged * selectionChanged * fileActivated * confirmOverwrite

You can also not use the methods that directly control user navigation: * fileChooserUnselectFilename * fileChooserSelectAll * fileChooserUnselectAll

If you need any of the above you will have to use FileChooserDialog directly.

No operations that change the the dialog work while the dialog is visible. Set all the properties that are required before showing the dialog.

## {gtkfilechooserdialognative-win32}

On windows the IFileDialog implementation (added in Windows Vista) is used. It supports many of the features that FileChooserDialog does, but there are some things it does not handle:

• Extra widgets added with fileChooserSetExtraWidget.
• Use of custom previews by connecting to updatePreview.
• Any FileFilter added using a mimetype or custom filter.

If any of these features are used the regular FileChooserDialog will be used in place of the native one.

## {gtkfilechooserdialognative-portal}

When the org.freedesktop.portal.FileChooser portal is available on the session bus, it is used to bring up an out-of-process file chooser. Depending on the kind of session the application is running in, this may or may not be a GTK+ file chooser. In this situation, the following things are not supported and will be silently ignored:

• Extra widgets added with fileChooserSetExtraWidget.
• Use of custom previews by connecting to updatePreview.
• Any FileFilter added with a custom filter.

## {gtkfilechooserdialognative-macos}

On macOS the NSSavePanel and NSOpenPanel classes are used to provide native file chooser dialogs. Some features provided by FileChooserDialog are not supported:

• Extra widgets added with fileChooserSetExtraWidget, unless the widget is an instance of GtkLabel, in which case the label text will be used to set the NSSavePanel message instance property.
• Use of custom previews by connecting to updatePreview.
• Any FileFilter added with a custom filter.
• Shortcut folders.

Exported types

newtype FileChooserNative

Memory-managed wrapper type.

Constructors

FileChooserNative (ManagedPtr FileChooserNative)

Instances

Eq FileChooserNative

Defined in GI.Gtk.Objects.FileChooserNative

Methods

(==) :: FileChooserNative -> FileChooserNative -> Bool

(/=) :: FileChooserNative -> FileChooserNative -> Bool

IsGValue FileChooserNative

Convert FileChooserNative to and from GValue with toGValue and fromGValue.

Defined in GI.Gtk.Objects.FileChooserNative

Methods

toGValue :: FileChooserNative -> IO GValue

fromGValue :: GValue -> IO FileChooserNative

ManagedPtrNewtype FileChooserNative

Defined in GI.Gtk.Objects.FileChooserNative

Methods

toManagedPtr :: FileChooserNative -> ManagedPtr FileChooserNative

TypedObject FileChooserNative

Defined in GI.Gtk.Objects.FileChooserNative

Methods

glibType :: IO GType

GObject FileChooserNative

Defined in GI.Gtk.Objects.FileChooserNative

HasParentTypes FileChooserNative

Defined in GI.Gtk.Objects.FileChooserNative

type ParentTypes FileChooserNative

Defined in GI.Gtk.Objects.FileChooserNative

type ParentTypes FileChooserNative = '[NativeDialog, Object, FileChooser]

class (GObject o, IsDescendantOf FileChooserNative o) => IsFileChooserNative o

Type class for types which can be safely cast to FileChooserNative, for instance with toFileChooserNative.

Instances

(GObject o, IsDescendantOf FileChooserNative o) => IsFileChooserNative o

Defined in GI.Gtk.Objects.FileChooserNative

toFileChooserNative :: (MonadIO m, IsFileChooserNative o) => o -> m FileChooserNative

Cast to FileChooserNative, for types for which this is known to be safe. For general casts, use castTo.

Methods

Overloaded methods

getAcceptLabel

fileChooserNativeGetAcceptLabel

Arguments

:: (HasCallStack, MonadIO m, IsFileChooserNative a)

=> a

self: a GtFileChooserNative

-> m (Maybe Text)

Returns: The custom label, or Nothing for the default. This string is owned by GTK+ and should not be modified or freed

Retrieves the custom label text for the accept button.

Since: 3.20

getCancelLabel

fileChooserNativeGetCancelLabel

Arguments

:: (HasCallStack, MonadIO m, IsFileChooserNative a)

=> a

self: a GtFileChooserNative

-> m (Maybe Text)

Returns: The custom label, or Nothing for the default. This string is owned by GTK+ and should not be modified or freed

Retrieves the custom label text for the cancel button.

Since: 3.20

new

fileChooserNativeNew

Arguments

:: (HasCallStack, MonadIO m, IsWindow a)

=> Maybe Text

title: Title of the native, or Nothing

-> Maybe a

parent: Transient parent of the native, or Nothing

-> FileChooserAction

action: Open or save mode for the dialog

-> Maybe Text

acceptLabel: text to go in the accept button, or Nothing for the default

-> Maybe Text

cancelLabel: text to go in the cancel button, or Nothing for the default

-> m FileChooserNative

Returns: a new FileChooserNative

Creates a new FileChooserNative.

Since: 3.20

setAcceptLabel

fileChooserNativeSetAcceptLabel

Arguments

:: (HasCallStack, MonadIO m, IsFileChooserNative a)

=> a

self: a GtFileChooserNative

-> Maybe Text

acceptLabel: custom label or Nothing for the default

-> m ()

Sets the custom label text for the accept button.

If characters in label are preceded by an underscore, they are underlined. If you need a literal underscore character in a label, use “__” (two underscores). The first underlined character represents a keyboard accelerator called a mnemonic. Pressing Alt and that key activates the button.

Since: 3.20

setCancelLabel

fileChooserNativeSetCancelLabel

Arguments

:: (HasCallStack, MonadIO m, IsFileChooserNative a)

=> a

self: a GtFileChooserNative

-> Maybe Text

cancelLabel: custom label or Nothing for the default

-> m ()

Sets the custom label text for the cancel button.

If characters in label are preceded by an underscore, they are underlined. If you need a literal underscore character in a label, use “__” (two underscores). The first underlined character represents a keyboard accelerator called a mnemonic. Pressing Alt and that key activates the button.

Since: 3.20

Properties

acceptLabel

The text used for the label on the accept button in the dialog, or Nothing to use the default text.

clearFileChooserNativeAcceptLabel :: (MonadIO m, IsFileChooserNative o) => o -> m ()

Set the value of the “accept-label” property to Nothing. When overloading is enabled, this is equivalent to

clear #acceptLabel

constructFileChooserNativeAcceptLabel :: (IsFileChooserNative o, MonadIO m) => Text -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “accept-label” property. This is rarely needed directly, but it is used by new.

getFileChooserNativeAcceptLabel :: (MonadIO m, IsFileChooserNative o) => o -> m (Maybe Text)

Get the value of the “accept-label” property. When overloading is enabled, this is equivalent to

get fileChooserNative #acceptLabel

setFileChooserNativeAcceptLabel :: (MonadIO m, IsFileChooserNative o) => o -> Text -> m ()

Set the value of the “accept-label” property. When overloading is enabled, this is equivalent to

set fileChooserNative [ #acceptLabel := value ]

cancelLabel

The text used for the label on the cancel button in the dialog, or Nothing to use the default text.

clearFileChooserNativeCancelLabel :: (MonadIO m, IsFileChooserNative o) => o -> m ()

Set the value of the “cancel-label” property to Nothing. When overloading is enabled, this is equivalent to

clear #cancelLabel

constructFileChooserNativeCancelLabel :: (IsFileChooserNative o, MonadIO m) => Text -> m (GValueConstruct o)

Construct a GValueConstruct with valid value for the “cancel-label” property. This is rarely needed directly, but it is used by new.

getFileChooserNativeCancelLabel :: (MonadIO m, IsFileChooserNative o) => o -> m (Maybe Text)

Get the value of the “cancel-label” property. When overloading is enabled, this is equivalent to

get fileChooserNative #cancelLabel

setFileChooserNativeCancelLabel :: (MonadIO m, IsFileChooserNative o) => o -> Text -> m ()

Set the value of the “cancel-label” property. When overloading is enabled, this is equivalent to

set fileChooserNative [ #cancelLabel := value ]