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);