kdu_client::is_idle

Returns true if the server has finished responding to all pending window requests, and the network management thread is still alive. The state of this function reverts to false immediately after any call to post_window which will cause a request to be sent to the server. Any request for a window which is known to have been completely serviced already, however, will not result in a message being sent to the server, so in that case is_idle will remain true if it was previously true.