| 摘要 |
PURPOSE: To evade hard copy printing output during a drawing processing by performing synchronous control over the drawing processing and printing processing for the hard copy printing output during the drawing processing to a terminal screen. CONSTITUTION: When a hard copy key is depressed during the drawing processing, a synchronous type function is sent to the drawing processing prior to the printing processing and a response is expected to be received. After the response is received, the printing processing is started and carried out and then a screen output 12 and a printing output 13 match each other, thus performing synchronous control over a screen output state and a hard copy printing result. Then when the hard copy (printing) key is depressed by the keyboard of the screen display terminal side, the state of the printer hardware is confirmed and it is judged that the drawing processing is under way. For this judgement, the synchronous type function is sent to a drawing data group transmission queue that a server holds and a response is expected to received. After the response is received, a hard copy printing process is started on condition that the return value indicates normal response reception, and the printing processing is carried out to perform output to a hard copy printer. |
