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ABAP_DYNPRO - CFW Events This example shows how CFW events are handled.
ABAP_SOURCE_CODE ABAP_EXEC
ABAP_DESCRIPTION Dynpro 100 contains an output field field and a custom control called textedit. The flow logic of dynpro 100 is: PROCESS BEFORE OUTPUT. MODULE status_0100. PROCESS AFTER INPUT. MODULE cancel AT EXIT-COMMAND. MODULE user_command_0100. In the GUI status SCREEN_100, the function codes BACK, EXIT, and CANCEL are created with type E and the function code INSERT is created without a specific type. The program contains a local class called event_handler with event handlers for the events F1 and F4 of the global class CL_GUI_TEXTEDIT. When the program is executed, dynpro 100 instantiates objects of the classes CL_GUI_CUSTOM_CONTAINER , CL_GUI_TEXTEDIT, and event_handler after PBO. The container control is linked with the custom control on the dynpro and the instance of the textedit control is linked with this container. The events F1 and F4 of the textedit control are registered using the method SET_REGISTERED_EVENTS to ensure that they are passed to the current ABAP_ASINSTANCE . F1 is defined as a system event and F4 as an application event. The event handling methods of the instance handle of the class event_handler are registered as handlers for the events. Before the dynpro is sent, the textedit control is filled with the content of table text_tab. As long as the dynpro is displayed, the user is allowed to edit the text. When INSERT is selected, PAI is raised, and the current text from the textedit control is passed to the table text_tab. If F1 is selected on the textedit control, the method handle_f1 is executed immediately. This assigns the content of the line to the field field. Calling the method set_new_ok_code raises PAI. This is the only way to ensure that the PBO is processed and the content of field is sent to the dynpro. If F4 is selected on the textedit control, PAI is raised. The method DISPATCH is called and raises the method handle_f4 . This assigns the content of the line to the field field: Since the system then automatically returns to PAI processing, PBO is also processed and the field content is transported. In either case, regardless of whether the user chooses F1 or F4, the content of the textedit control is not passed to the internal table text_tab. Consequently, the textedit control is overwritten with the previous content of text_tab after PBO.
