SCREEN 0100 PROCESS BEFORE OUTPUT. - BC412 ABAP Dialog Programming Using Enjoy SAP Controls(1)

MODULE status_0100.

MODULE init_control_processing. PROCESS AFTER INPUT.

MODULE exit_command_0100 AT EXIT-COMMAND. MODULE user_command_0100.

ABAP program

Local classes

*&---* *& Report SAPBC412_BASS_EXERCISE * *& * *&---* REPORT sapbc412_bass_exercise MESSAGE-ID bc412.

*---* * CLASS lcl_event_handler DEFINITION

*---* * Definition of a local class containing event handler * * methods for picture control objects * *---_---* CLASS lcl_event_handler DEFINITION.

PUBLIC SECTION. CLASS-METHODS: on_picture_click

FOR EVENT picture_click OF cl_gui_picture IMPORTING mouse_pos_x mouse_pos_y,

*---* * CLASS lcl_event_handler IMPLEMENTATION

*---* * Corresponding class implementation * *---* CLASS lcl_event_handler IMPLEMENTATION.

METHOD on_picture_click.

MESSAGE i016 WITH mouse_pos_x mouse_pos_y. ENDMETHOD.

METHOD on_control_dblclick.

MESSAGE i017 WITH mouse_pos_x mouse_pos_y. ENDMETHOD. ENDCLASS.

Data declarations

* data declarations * screen specific DATA:

ok_code TYPE sy-ucomm, " command field copy_ok_code LIKE ok_code, " copy of ok_code l_answer TYPE c, " return flag (used in " standard user dialogs) * control specific: object references

ref_container TYPE REF TO cl_gui_custom_container, ref_picture TYPE REF TO cl_gui_picture,

* control specific: auxiliary fields

first_time TYPE c, " flag (screen + control) l_url(80) TYPE c, " URL of picture to be shown l_result TYPE i value 1, " status variable of load_picture " 1 = o.k., 0 = error

current_mode LIKE cl_gui_picture=>display_mode, * event handling

it_events TYPE cntl_simple_events, " internal (event) table wa_events LIKE LINE OF it_events. " work area

Event blocks of the ABAP main program

* start of main program

START-OF-SELECTION.

CALL FUNCTION 'BC412_BDS_GET_PIC_URL'" fetch URL of first picture * EXPORTING " from BDS * NUMBER = 1 IMPORTING url = l_url EXCEPTIONS OTHERS = 1.

IF sy-subrc <> 0. " no picture --> end of program LEAVE PROGRAM.

ENDIF.

CALL SCREEN 100. " container screen for SAP-Enjoy " controls

* end of main program

Modules

*&---* *& Module INIT_CONTROL_PROCESSING OUTPUT

*&---* * Implementation of EnjoySAP control processing:

* 1) create container object and link to screen area * 2) create picture object and link to container * 3) load picture into picture control

* 4) event handling

* a1) register event PICTURE_CLICK at CFW * a2) register event CONTROL_DBLCLICK at CFW

* b1) register event handler method ON_PICTURE_CLICK * for the picture control object

* b2) register event handler method ON_CONTROL_DBLCLICK * for the picture control object

*---* MODULE init_control_processing OUTPUT.

IF first_time IS INITIAL. " prevent re-processing on ENTER first_time = 'X'.

* create container object and link to screen area CREATE OBJECT ref_container

EXPORTING

container_name = 'CONTROL_AREA1' EXCEPTIONS

others = 1. IF sy-subrc NE 0.

* create picture control and link to container object CREATE OBJECT ref_picture

EXPORTING

parent = ref_container EXCEPTIONS

others = 1. IF sy-subrc NE 0.

MESSAGE a011. " cancel program processing ENDIF.

* load picture into picture control

CALL METHOD ref_picture->load_picture_from_url EXPORTING url = l_url IMPORTING result = l_result EXCEPTIONS OTHERS = 1. IF sy-subrc NE 0. MESSAGE a012. ENDIF. CASE l_result.

WHEN 0. " picture not loaded MESSAGE s013.

WHEN 1. " load of picture successful MESSAGE s014.

ENDCASE.

* event handling

* 1. register events for control framework

wa_events-eventid = cl_gui_picture=>eventid_picture_click. wa_events-appl_event = ' '.

INSERT wa_events INTO TABLE it_events.

wa_events-eventid = cl_gui_picture=>eventid_control_dblclick. wa_events-appl_event = ' '.

INSERT wa_events INTO TABLE it_events.

CALL METHOD ref_picture->set_registered_events EXPORTING

events = it_events EXCEPTIONS

OTHERS = 1. IF sy-subrc NE 0.

* 2. set event handler for ABAP object instance: ref_picture SET HANDLER lcl_event_handler=>on_picture_click

FOR ref_picture.

SET HANDLER lcl_event_handler=>on_control_dblclick FOR ref_picture.

ENDIF.

ENDMODULE. " INIT_CONTROL_PROCESSING OUTPUT

*&---* *& Module USER_COMMAND_0100 INPUT

*&---* * Implementation of user commands of type ' ':

* - push buttons on screen 100 * - GUI functions

*---* MODULE user_command_0100 INPUT.

copy_ok_code = ok_code. CLEAR ok_code.

CASE copy_ok_code.

WHEN 'BACK'. " back to program, leave screen CLEAR l_answer.

CALL FUNCTION 'POPUP_TO_CONFIRM_STEP' EXPORTING * DEFAULTOPTION = 'Y' textline1 = text-004 textline2 = text-005 titel = text-007 cancel_display = ' ' IMPORTING answer = l_answer. CASE l_answer. WHEN 'J'. PERFORM free_control_ressources. LEAVE TO SCREEN 0. WHEN 'N'.

SET SCREEN sy-dynnr. ENDCASE.

WHEN 'STRETCH'. " picture operation: stretch to fit area CALL METHOD ref_picture->set_display_mode

EXPORTING

display_mode = cl_gui_picture=>display_mode_stretch EXCEPTIONS

WHEN 'NORMAL'. " picture operation: fit normal size CALL METHOD ref_picture->set_display_mode

EXPORTING display_mode = cl_gui_picture=>display_mode_normal EXCEPTIONS OTHERS = 1. IF sy-subrc NE 0. MESSAGE s015. ENDIF.

WHEN 'NORMAL_CENTER'. " picture operation: center normal size CALL METHOD ref_picture->set_display_mode

EXPORTING display_mode = cl_gui_picture=>display_mode_normal_center EXCEPTIONS OTHERS = 1. IF sy-subrc NE 0. MESSAGE s015. ENDIF.

WHEN 'FIT'. " picture operation: zoom picture CALL METHOD ref_picture->set_display_mode

EXPORTING display_mode = cl_gui_picture=>display_mode_fit EXCEPTIONS OTHERS = 1. IF sy-subrc NE 0. MESSAGE s015. ENDIF.

WHEN 'FIT_CENTER'. " picture operation: zoom and center CALL METHOD ref_picture->set_display_mode

EXPORTING display_mode = cl_gui_picture=>display_mode_fit_center EXCEPTIONS OTHERS = 1. IF sy-subrc NE 0. MESSAGE s015. ENDIF. WHEN 'MODE_INFO'. current_mode = ref_picture->display_mode. MESSAGE i025 WITH current_mode.

ENDCASE.

ENDMODULE. " USER_COMMAND_0100 INPUT

SET PF-STATUS 'STATUS_NORM_0100'. SET TITLEBAR 'TITLE_NORM_0100'.

ENDMODULE. " STATUS_0100 OUTPUT

*&---* *& Module EXIT_COMMAND_0100 INPUT

*&---* * Implementation of user commands of type 'E'.

*---* MODULE exit_command_0100 INPUT.

CASE ok_code.

WHEN 'CANCEL'. " cancel current screen processing CLEAR l_answer.

CALL FUNCTION 'POPUP_TO_CONFIRM_STEP' EXPORTING * DEFAULTOPTION = 'Y' textline1 = text-004 textline2 = text-005 titel = text-006 cancel_display = ' ' IMPORTING answer = l_answer. CASE l_answer. WHEN 'J'. PERFORM free_control_ressources. LEAVE TO SCREEN 0. WHEN 'N'. CLEAR ok_code.

SET SCREEN sy-dynnr. ENDCASE.

WHEN 'EXIT'. " leave program CLEAR l_answer.

CALL FUNCTION 'POPUP_TO_CONFIRM_STEP' EXPORTING * DEFAULTOPTION = 'Y' textline1 = text-001 textline2 = text-002 titel = text-003 cancel_display = 'X' IMPORTING answer = l_answer. CASE l_answer.

WHEN 'J' OR 'N'. " no data to update PERFORM free_control_ressources.

LEAVE PROGRAM. WHEN 'A'.

CLEAR ok_code.

Subroutines

*&---* *& Form free_control_ressources

*&---* * Free all control related ressources.

*---* * no interface

*---* FORM free_control_ressources.

CALL METHOD ref_picture->free. CALL METHOD ref_container->free. FREE: ref_picture, ref_container.

In document BC412 ABAP Dialog Programming Using Enjoy SAP Controls(1) (Page 136-144)