PrintOperation.run

Runs the print operation.

Normally that this function does not return until the rendering of all pages is complete. You can connect to the [signal@Gtk.PrintOperation::status-changed] signal on @op to obtain some information about the progress of the print operation.

Furthermore, it may use a recursive mainloop to show the print dialog.

If you set the [Gtk.PrintOperation:allow-async] property, the operation will run asynchronously if this is supported on the platform. The [signal@Gtk.PrintOperation::done] signal will be emitted with the result of the operation when the it is done (i.e. when the dialog is canceled, or when the print succeeds or fails).

if (settings != NULL)
gtk_print_operation_set_print_settings (print, settings);

if (page_setup != NULL)
gtk_print_operation_set_default_page_setup (print, page_setup);

g_signal_connect (print, "begin-print",
G_CALLBACK (begin_print), &data);
g_signal_connect (print, "draw-page",
G_CALLBACK (draw_page), &data);

res = gtk_print_operation_run (print,
GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
parent,
&error);

if (res == GTK_PRINT_OPERATION_RESULT_ERROR)
{
error_dialog = gtk_message_dialog_new (GTK_WINDOW (parent),
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_ERROR,
GTK_BUTTONS_CLOSE,
"Error printing file:\n%s",
error->message);
g_signal_connect (error_dialog, "response",
G_CALLBACK (gtk_window_destroy), NULL);
gtk_widget_show (error_dialog);
g_error_free (error);
}
else if (res == GTK_PRINT_OPERATION_RESULT_APPLY)
{
if (settings != NULL)
g_object_unref (settings);
settings = g_object_ref (gtk_print_operation_get_print_settings (print));
}

Note that gtk_print_operation_run() can only be called once on a given GtkPrintOperation.