FileChooser.connectConfirmOverwrite

Connect to ConfirmOverwrite signal.

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.types.FileChooserAction.Save] mode.

Most applications just need to turn on the #GtkFileChooser:do-overwrite-confirmation property (or call the [gtk.file_chooser.FileChooser.setDoOverwriteConfirmation] 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 #GtkFileChooser::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.types.FileChooserConfirmation.SelectAgain]. If it determines that the user is satisfied with his choice of file name, it should return [gtk.types.FileChooserConfirmation.AcceptFilename]. On the other hand, if it determines that the stock confirmation dialog should be used, it should return [gtk.types.FileChooserConfirmation.Confirm]. The following example illustrates this.

## Custom confirmation ## {#gtkfilechooser-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);