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>屬性 ->方法 class lcl_product definition. public section. events: pricechanged. methods: raise_event. " private section. data: price type i. endclass. "lcl_product DEFINITION *----------------------------------------------------------------------* * CLASS lcl_product IMPLEMENTATION *----------------------------------------------------------------------* * *----------------------------------------------------------------------* class lcl_product implementation. method raise_event. write: / '------------------------------------'. write: / 'Before event trrigger'. raise event pricechanged. " write: / 'After event trrigger'. write: / '------------------------------------'. endmethod. "raise_event endclass. "lcl_product IMPLEMENTATION *---------------------------------------------------------------- * CLASS lcl_customer *---------------------------------------------------------------- class lcl_customer definition. public section. methods: handle_price_changed for event pricechanged of lcl_product importing sender. endclass. "lcl_customer DEFINITION *----------------------------------------------------------------------* * CLASS lcl_customer IMPLEMENTATION *----------------------------------------------------------------------* * *----------------------------------------------------------------------* class lcl_customer implementation. method handle_price_changed. write: / ' Customer handle changed price'. endmethod. "handle_price_changed endclass. "lcl_customer IMPLEMENTATION *---------------------------------------------------------------- * CLASS lcl_logger *---------------------------------------------------------------- class lcl_logger definition. public section. methods: handle_price_changed for event pricechanged of lcl_product importing sender. endclass. "lcl_logger DEFINITION *----------------------------------------------------------------------* * CLASS lcl_logger IMPLEMENTATION *----------------------------------------------------------------------* * *----------------------------------------------------------------------* class lcl_logger implementation. method handle_price_changed. write: / ' Logger log changed price'. endmethod. "handle_price_changed endclass. "lcl_logger IMPLEMENTATION * Create object instances start-of-selection. data:grf_product type ref to lcl_product, grf_customer type ref to lcl_customer, grf_logger type ref to lcl_logger. create object grf_product. create object grf_customer. create object grf_logger. * Register event set handler grf_customer->handle_price_changed for grf_product. set handler grf_logger->handle_price_changed for grf_product. * Trigger event grf_product->raise_event( ). |
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來(lái)自： 昵稱20455787 > 《ABAP》
