FileChooserNative


Object Hierarchy:

Object hierarchy for FileChooserNative

Description:

[ CCode ( type_id = "gtk_file_chooser_native_get_type ()" ) ]
public class FileChooserNative : NativeDialog, FileChooser

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.

Typical usage

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

static void
on_response (GtkNativeDialog *native,
int response)
{
if (response == GTK_RESPONSE_ACCEPT)
{
GtkFileChooser *chooser = GTK_FILE_CHOOSER (native);
GFile *file = gtk_file_chooser_get_file (chooser);

open_file (file);

g_object_unref (file);
}

g_object_unref (native);
}

// ...
GtkFileChooserNative *native;
GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_OPEN;

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

g_signal_connect (native, "response", G_CALLBACK (on_response), NULL);
gtk_native_dialog_show (GTK_NATIVE_DIALOG (native));

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

static void
on_response (GtkNativeDialog *native,
int response)
{
if (response == GTK_RESPONSE_ACCEPT)
{
GtkFileChooser *chooser = GTK_FILE_CHOOSER (native);
GFile *file = gtk_file_chooser_get_file (chooser);

save_to_file (file);

g_object_unref (file);
}

g_object_unref (native);
}

// ...
GtkFileChooserNative *native;
GtkFileChooser *chooser;
GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_SAVE;

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

if (user_edited_a_new_document)
gtk_file_chooser_set_current_name (chooser, _("Untitled document"));
else
gtk_file_chooser_set_file (chooser, existing_file, NULL);

g_signal_connect (native, "response", G_CALLBACK (on_response), NULL);
gtk_native_dialog_show (GTK_NATIVE_DIALOG (native));

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

Response Codes

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

Differences from FileChooserDialog

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.

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

Win32 details

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:

* Any FileFilter added using a mimetype

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

Portal details

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.

macOS details

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

* Shortcut folders.


Namespace: Gtk
Package: gtk4

Content:

Properties:

Creation methods:

Methods:

Inherited Members: