GtkIMContext Base class for input method contexts @context: @window: @context: @str: @attrs: @cursor_pos: @context: @event: @Returns: @context: @context: @context: @context: @area: @context: @use_preedit: @context: @text: @len: @cursor_index: @context: @text: @cursor_index: @Returns: @context: @offset: @n_chars: @Returns: @imcontext: the object which received the signal. @arg1: @imcontext: the object which received the signal. @arg1: @arg2: @Returns: @imcontext: the object which received the signal. @imcontext: the object which received the signal. @imcontext: the object which received the signal. @imcontext: the object which received the signal. @Returns: