OO实现ALV TABLE 九：ALV的事件[转]

SAP的一个类cl_salv_events_table提供了几个常用的事件，包括链接点击，双击，功能触发之前和触发之后，页眉页脚（其中页眉页脚暂时测试不成功，以后再试）。跟其他事件相比，类CL_SALV_EVENTS_TABLE提供了这几个常用的事件已经和ALV结合在一起，所以我们只要实现这几个事件的处理方法就可以了。

1. 首先我们要定义好事件的处理方法。

CLASS-METHODS: on_user_command FOR EVENT added_function OF cl_salv_events_table

IMPORTING e_salv_function,

on_double_click FOR EVENT double_click OF cl_salv_events_table

IMPORTING row column,

on_link_click FOR EVENT link_click OF cl_salv_events_table

IMPORTING row column,

on_before_salv_function FOR EVENT before_salv_function OF cl_salv_events_table

IMPORTING e_salv_function,

on_after_salv_function FOR EVENT after_salv_function OF cl_salv_events_table

IMPORTING e_salv_function.

2. 实现事件的处理方法。

*单击新增功能按钮事件处理方法

METHOD on_user_command.

CONCATENATE 'Function Code is '

e_salv_function

INTO g_string SEPARATED BY space.

MESSAGE i000(0k) WITH g_string.

ENDMETHOD. "on_user_command

*双击事件处理方法

METHOD on_double_click.

g_string = row.

CONCATENATE 'DOUBLE CLICK'

'ROW'

g_string

'COLUMN'

column

INTO g_string SEPARATED BY space.

MESSAGE i000(0k) WITH g_string.

ENDMETHOD. "on_double_click

*单击事件处理方法

METHOD on_link_click.

g_string = row.

CONCATENATE 'LICK CLICK'

'ROW'

g_string

'COLUMN'

column

INTO g_string SEPARATED BY space.

MESSAGE i000(0k) WITH g_string.

ENDMETHOD. "on_link_click

*触发事件之前

METHOD on_before_salv_function.

CONCATENATE 'Before Function '

e_salv_function

INTO g_string SEPARATED BY space.

MESSAGE i000(0k) WITH g_string.

ENDMETHOD. "on_before_salv_function

*触发事件之后

METHOD on_after_salv_function.

CONCATENATE 'After Function '

e_salv_function

INTO g_string SEPARATED BY space.

MESSAGE i000(0k) WITH g_string.

ENDMETHOD. "on_after_salv_function

3. 取得ALV事件的实例

lr_events = gr_table->get_event( ).

4. 注册事件的处理方法

SET HANDLER lcl_handle_events=>on_user_command FOR lr_events.

SET HANDLER lcl_handle_events=>on_double_click FOR lr_events.

SET HANDLER lcl_handle_events=>on_link_click FOR lr_events.

SET HANDLER lcl_handle_events=>on_before_salv_function FOR lr_events.

SET HANDLER lcl_handle_events=>on_after_salv_function FOR lr_events.

下面是效果图

下面是程序的所有代码:

REPORT y_xin_002.

INCLUDE <icon>.

*变量定义

TYPES: BEGIN OF gs_spfli,

mandt TYPE spfli-mandt,

carrid TYPE spfli-carrid,

connid TYPE spfli-connid,

countryfr TYPE spfli-countryfr,

cityfrom TYPE spfli-cityfrom,

airpfrom TYPE spfli-airpfrom,

countryto TYPE spfli-countryto,

cityto TYPE spfli-cityto,

airpto TYPE spfli-airpto,

fltime TYPE spfli-fltime,

deptime TYPE spfli-deptime,

arrtime TYPE spfli-arrtime,

distance TYPE spfli-distance,

distid TYPE spfli-distid,

fltype TYPE spfli-fltype,

period TYPE spfli-period,

hotspot TYPE icon_d,

END OF gs_spfli.

TYPES ty_spfli TYPE gs_spfli OCCURS 0.

*----------------------------------------------------------------------*

* CLASS lcl_handle_events DEFINITION

*----------------------------------------------------------------------*

* 事件操作类（定义）

*----------------------------------------------------------------------*

CLASS lcl_handle_events DEFINITION.

PUBLIC SECTION.

CLASS-METHODS: on_user_command FOR EVENT added_function OF cl_salv_events_table

IMPORTING e_salv_function,

on_double_click FOR EVENT double_click OF cl_salv_events_table

IMPORTING row column,

on_link_click FOR EVENT link_click OF cl_salv_events_table

IMPORTING row column,

on_before_salv_function FOR EVENT before_salv_function OF cl_salv_events_table

IMPORTING e_salv_function,

on_after_salv_function FOR EVENT after_salv_function OF cl_salv_events_table

IMPORTING e_salv_function.

PRIVATE SECTION.

CLASS-DATA: g_string TYPE string.

ENDCLASS. "lcl_handle_events DEFINITION

*----------------------------------------------------------------------*

* CLASS lcl_handle_events IMPLEMENTATION

*----------------------------------------------------------------------*

* 事件操作类（实现）

*----------------------------------------------------------------------*

CLASS lcl_handle_events IMPLEMENTATION.

*单击新增功能按钮事件处理方法

METHOD on_user_command.

CONCATENATE 'Function Code is '

e_salv_function

INTO g_string SEPARATED BY space.

MESSAGE i000(0k) WITH g_string.

ENDMETHOD. "on_user_command

*双击事件处理方法

METHOD on_double_click.

g_string = row.

CONCATENATE 'DOUBLE CLICK'

'ROW'

g_string

'COLUMN'

column

INTO g_string SEPARATED BY space.

MESSAGE i000(0k) WITH g_string.

ENDMETHOD. "on_double_click

*单击事件处理方法

METHOD on_link_click.

g_string = row.

CONCATENATE 'LICK CLICK'

'ROW'

g_string

'COLUMN'

column

INTO g_string SEPARATED BY space.

MESSAGE i000(0k) WITH g_string.

ENDMETHOD. "on_link_click

*触发事件之前

METHOD on_before_salv_function.

CONCATENATE 'Before Function '

e_salv_function

INTO g_string SEPARATED BY space.

MESSAGE i000(0k) WITH g_string.

ENDMETHOD. "on_before_salv_function

*触发事件之后

METHOD on_after_salv_function.

CONCATENATE 'After Function '

e_salv_function

INTO g_string SEPARATED BY space.

MESSAGE i000(0k) WITH g_string.

ENDMETHOD. "on_after_salv_function

ENDCLASS. "lcl_handle_events IMPLEMENTATION

*----------------------------------------------------------------------*

* CLASS lcl_alv DEFINITION

*----------------------------------------------------------------------*

* ALV操作类（定义）

*----------------------------------------------------------------------*

CLASS lcl_alv DEFINITION.

PUBLIC SECTION.

METHODS: getdata "取得要显示的数据

RETURNING value(lt_tab) TYPE ty_spfli,

alv_full "全屏Grid列表处理方法

IMPORTING value(lt_tab) TYPE ty_spfli.

PRIVATE SECTION.

DATA: gr_table TYPE REF TO cl_salv_table.

ENDCLASS. "lcl_alv DEFINITION

*----------------------------------------------------------------------*

* CLASS lcl_alv IMPLEMENTATION

*----------------------------------------------------------------------*

* ALV操作类（实现）

*----------------------------------------------------------------------*

CLASS lcl_alv IMPLEMENTATION.

*取得要显示的数据

METHOD getdata.

SELECT * INTO CORRESPONDING FIELDS OF TABLE lt_tab FROM spfli.

FIELD-SYMBOLS <fs_spfli> TYPE gs_spfli.

LOOP AT lt_tab ASSIGNING <fs_spfli>.

<fs_spfli>-hotspot = icon_overview.

ENDLOOP.

ENDMETHOD. "getdata

*输出全屏网格列表的方法

METHOD alv_full.

DATA: lr_functions TYPE REF TO cl_salv_functions_list,

lr_events TYPE REF TO cl_salv_events_table,

lr_columns TYPE REF TO cl_salv_columns_table,

lr_column TYPE REF TO cl_salv_column_table,

lr_content TYPE REF TO cl_salv_form_element.

"创建实例

TRY.

cl_salv_table=>factory(

IMPORTING

r_salv_table = gr_table

CHANGING

t_table = lt_tab

).

CATCH cx_salv_msg.

ENDTRY.

"设置GUI Status

gr_table->set_screen_status(

report = sy-repid

pfstatus = 'SALV_STANDARD'

set_functions = gr_table->c_functions_all

).

"设置热点

lr_columns = gr_table->get_columns( ).

TRY.

lr_column ?= lr_columns->get_column( 'HOTSPOT' ).

lr_column->set_cell_type( if_salv_c_cell_type=>hotspot ).

lr_column->set_long_text( 'HOTSPOT' ).

CATCH cx_salv_not_found.

ENDTRY.

"注册事件

lr_events = gr_table->get_event( ).

SET HANDLER lcl_handle_events=>on_user_command FOR lr_events.

SET HANDLER lcl_handle_events=>on_double_click FOR lr_events.

SET HANDLER lcl_handle_events=>on_link_click FOR lr_events.

SET HANDLER lcl_handle_events=>on_before_salv_function FOR lr_events.

SET HANDLER lcl_handle_events=>on_after_salv_function FOR lr_events.

"显示列表

gr_table->display( ).

ENDMETHOD. "alv_full

ENDCLASS. "lcl_alv IMPLEMENTATION

*&---------------------------------------------------------------------*

*& Form f_main

*&---------------------------------------------------------------------*

* 整合数据，执行

*----------------------------------------------------------------------*

FORM f_main.

DATA: lt_tab TYPE ty_spfli,

lr_alv TYPE REF TO lcl_alv.

CREATE OBJECT lr_alv.

"取得要显示的数据

lt_tab = lr_alv->getdata( ).

lr_alv->alv_full( lt_tab ).

ENDFORM. "f_main

*执行动作

START-OF-SELECTION.

PERFORM f_main.