# usage-example for the comment extensions to the # Written by Sebastian Setzer .PS copy "sequence.pic"; # Define the objects actor(U, ""); object(G,"g:GUI"); placeholder_object(Dummy1); # more space placeholder_object(D); step(); # Message sequences active(G); step(); create_message(G,D,"db:DB"); active(D); step(); inactive(D); async(); # use asynchrone messages (not-filled arrowheads) comment(D,C,down 1 right, wid 1 ht 0.7 "waiting for" "condition" "dbMailbox") message(U,G,"openBrowser"); message(G,D,"query()"); active(D); message(D,G,"result"); inactive(D); connect_to_comment(D,C) message(U,G,"scroll"); message(G,D,"query()"); active(D); message(D,G,"result"); inactive(D); connect_to_comment(D,C) message(U,G,"Exit"); step(); begin_frame(G,F,"OnExit"); message(G,D,"shutdown()"); inactive(G); active(D); comment(G,C,down .2 right .2, wid 2 ht 0.25 "wait for cond. dbShutdown") step(); comment(D,C,right, wid 2 ht 1 \ "all queries preceeding the" \ "shutdown in the mailbox" \ "are answered already." \ "DbQuery-Objects can" \ "be destroyed") message(D,G,"done"); inactive(D); active(G); sync(); destroy_message(G,D,""); step(); end_frame(D,F); step(); inactive(G); # Complete the lifelines step(); complete(G); complete(U); .PE
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