本教程介绍如何在SALV列上添加并处理热点hotspot。在大多数alv报表中，hotspot被用来标示有下钻报表的字段，比如能在销售订单号字段上下钻到VA03（销售订单显示）。
为了添加hotspot，具体需要以下步骤：
1，需要从SALV对象(CL_SALV_TABLE)得到CL_SALV_COLUMNS_TABLE的引用。CL_SALV_COLUMNS_TABLE是关于全部字段（column）的对象，由于hotspot是添加到某个具体的列上，所以还要get_column()方法得到单个列CL_SALV_COLUMN_TABLE的引用，这里用到类的强制转换‘？=’。
2，通过方法set_cell_type()为列设置hotspot
3，如果需要响应hotspot的点击，还需要设定对应事件on_link_click的handler
本实例在销售订单列上添加hotspot，单击hotspot探出信息框。
新的UML流程图如下：添加了两个方法，set_hotspot_vbeln()和on_link_click()
原始代码参照-->SALV教程1-创建简单SALV
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*&---------------------------------------------------------------------*
*& 一个简单的通过类CL_SALV_TABLE生成SALV的例子
*&---------------------------------------------------------------------*
REPORT z_salv_7.
*
*----------------------------------------------------------------------*
* CLASS lcl_report DEFINITION
*----------------------------------------------------------------------*
CLASS lcl_report DEFINITION.
*
PUBLIC SECTION.
*
* 定义SALV输出内表
TYPES: BEGIN OF ty_vbak,
vbeln TYPE vbak-vbeln,
erdat TYPE erdat,
auart TYPE auart,
kunnr TYPE kunnr,
END OF ty_vbak.
*
DATA: t_vbak TYPE STANDARD TABLE OF ty_vbak.
*
* ALV reference
DATA: o_alv TYPE REF TO cl_salv_table.
*
METHODS:
* 抽取数据
get_data,
*
* 生成输出内容
generate_output.
*
*$*$*.....CODE_ADD_1 - Begin..................................1..*$*$*
*
* 定义private method来设定SALV不同特性
PRIVATE SECTION.
METHODS:
set_pf_status CHANGING co_alv TYPE REF TO cl_salv_table.
* 设置hotspot
METHODS:
set_hotspot_vbeln CHANGING co_alv TYPE REF TO cl_salv_table.
*
* Event Handler for HOTSPOT event
METHODS:
on_link_click FOR EVENT link_click OF cl_salv_events_table
IMPORTING
row
column .
*$*$*.....CODE_ADD_1 - End....................................1..*$*$*
ENDCLASS. "lcl_report DEFINITION
*----------------------------------------------------------------------*
* CLASS lcl_report IMPLEMENTATION
*----------------------------------------------------------------------*
* 类实现
CLASS lcl_report IMPLEMENTATION.
*
METHOD get_data.
* 抽取数据
SELECT vbeln
erdat
auart
kunnr
INTO TABLE t_vbak
FROM vbak
UP TO 20 ROWS.
*
ENDMETHOD. "get_data
*.......................................................................
METHOD generate_output.
* New ALV instance
* We are calling the static Factory method which will give back
* the ALV object reference.
*
* exception class
DATA: lx_msg TYPE REF TO cx_salv_msg.
TRY.
cl_salv_table=>factory(
IMPORTING
r_salv_table = o_alv
CHANGING
t_table = t_vbak ).
CATCH cx_salv_msg INTO lx_msg.
ENDTRY.
*
*$*$*.....CODE_ADD_2 - Begin..................................2..*$*$*
*
* In this area we will call the methods which will set the
* different properties to the ALV
* 调用status设置方法
CALL METHOD set_pf_status
CHANGING
co_alv = o_alv.
* Set Up the Hotspot & Event Handler
CALL METHOD set_hotspot_vbeln
CHANGING
co_alv = o_alv.
*$*$*.....CODE_ADD_2 - End....................................2..*$*$*
*
* 调用Display方法将数据输出到屏幕上
o_alv->display( ).
*
ENDMETHOD. "generate_output
*
*$*$*.....CODE_ADD_3 - Begin..................................3..*$*$*
*
* In this area we will implement the methods which are defined in
* the class definition
* status设置方法实现
METHOD set_pf_status.
DATA: lo_functions TYPE REF TO cl_salv_functions_list.
* 设置默认的标准状态栏
lo_functions = co_alv->get_functions( ).
lo_functions->set_default( abap_true ).
ENDMETHOD.
METHOD set_hotspot_vbeln.
*
*...HotSpot
DATA: lo_cols_tab TYPE REF TO cl_salv_columns_table,
lo_col_tab TYPE REF TO cl_salv_column_table.
*
* get Columns object
lo_cols_tab = co_alv->get_columns( ).
*
* Get VBELN column
TRY.
lo_col_tab ?= lo_cols_tab->get_column( 'VBELN' ).
CATCH cx_salv_not_found.
ENDTRY.
*
* Set the HotSpot for VBELN Column
TRY.
CALL METHOD lo_col_tab->set_cell_type
EXPORTING
value = if_salv_c_cell_type=>hotspot.
.
CATCH cx_salv_data_error .
ENDTRY.
*
*...Events
DATA: lo_events TYPE REF TO cl_salv_events_table.
*
* all events
lo_events = o_alv->get_event( ).
*
* 设定event handler
SET HANDLER me->on_link_click FOR lo_events.
*
ENDMETHOD. "set_hotspot_vbeln
*
* Handles the UI on the VBELN (HotSpot)
METHOD on_link_click.
*
DATA: la_vbak TYPE ty_vbak.
*
* 取得销售订单
READ TABLE me->t_vbak INTO la_vbak INDEX row.
IF la_vbak-vbeln IS NOT INITIAL.
MESSAGE i398(00) WITH 'You have selected' la_vbak-vbeln.
ENDIF.
*
ENDMETHOD. "on_link_click
*$*$*.....CODE_ADD_3 - End....................................3..*$*$*
*
ENDCLASS. "lcl_report IMPLEMENTATION
START-OF-SELECTION.
DATA: lo_report TYPE REF TO lcl_report.
CREATE OBJECT lo_report.
* 抽取数据
lo_report->get_data( ).
* 生成SALV
lo_report->generate_output( ).
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运行后，双击热点会弹出信息框。
以上。