Event handling in global class (abap object)

Hello friends
I have 1 problem regarding events in abap object... how to handel an event in global class in se24 .
Regards
Reema jain.
Message was edited by:
Reema Jain

Hello Reema
The following sample report shows how to handle event in principle (see the § marks)..
The following sample report show customer data ("Header"; KNB1) in the first ALV list and sales areas ("Detail"; KNVV) for the selected customer (event double-click) in the second ALV list.
*& Report ZUS_SDN_TWO_ALV_GRIDS
REPORT zus_sdn_two_alv_grids.
DATA:
gd_okcode TYPE ui_func,
go_docking TYPE REF TO cl_gui_docking_container,
go_splitter TYPE REF TO cl_gui_splitter_container,
go_cell_top TYPE REF TO cl_gui_container,
go_cell_bottom TYPE REF TO cl_gui_container,
go_grid1 TYPE REF TO cl_gui_alv_grid,
go_grid2 TYPE REF TO cl_gui_alv_grid,
gs_layout TYPE lvc_s_layo.
DATA:
gt_knb1 TYPE STANDARD TABLE OF knb1,
gt_knvv TYPE STANDARD TABLE OF knvv.
"§1. Define and implement event handler method
" (Here: implemented as static methods of a local class)
* CLASS lcl_eventhandler DEFINITION
CLASS lcl_eventhandler DEFINITION.
PUBLIC SECTION.
 CLASS-METHODS:
 handle_double_click FOR EVENT double_click OF cl_gui_alv_grid
 IMPORTING
 e_row
 e_column
 es_row_no
 sender.
ENDCLASS. "lcl_eventhandler DEFINITION
* CLASS lcl_eventhandler IMPLEMENTATION
CLASS lcl_eventhandler IMPLEMENTATION.
METHOD handle_double_click.
* define local data
 DATA:
 ls_knb1 TYPE knb1.
 CHECK ( sender = go_grid1 ).
 READ TABLE gt_knb1 INTO ls_knb1 INDEX e_row-index.
 CHECK ( ls_knb1-kunnr IS NOT INITIAL ).
 CALL METHOD go_grid1->set_current_cell_via_id
 EXPORTING
* IS_ROW_ID =
* IS_COLUMN_ID =
 is_row_no = es_row_no.
* Triggers PAI of the dynpro with the specified ok-code
 CALL METHOD cl_gui_cfw=>set_new_ok_code( 'DETAIL' ).
ENDMETHOD. "handle_double_click
ENDCLASS. "lcl_eventhandler IMPLEMENTATION
START-OF-SELECTION.
SELECT * FROM knb1 INTO TABLE gt_knb1
 WHERE bukrs = '1000'.
* Create docking container
CREATE OBJECT go_docking
 EXPORTING
 parent = cl_gui_container=>screen0
 ratio = 90
 EXCEPTIONS
 OTHERS = 6.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* Create splitter container
CREATE OBJECT go_splitter
 EXPORTING
 parent = go_docking
 rows = 2
 columns = 1
* NO_AUTODEF_PROGID_DYNNR =
* NAME =
 EXCEPTIONS
 cntl_error = 1
 cntl_system_error = 2
 OTHERS = 3.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* Get cell container
CALL METHOD go_splitter->get_container
 EXPORTING
 row = 1
 column = 1
 RECEIVING
 container = go_cell_top.
CALL METHOD go_splitter->get_container
 EXPORTING
 row = 2
 column = 1
 RECEIVING
 container = go_cell_bottom.
* Create ALV grids
CREATE OBJECT go_grid1
 EXPORTING
 i_parent = go_cell_top
 EXCEPTIONS
 OTHERS = 5.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
"§2. Set event handler (after creating the ALV instance)
SET HANDLER: lcl_eventhandler=>handle_double_click FOR go_grid1. " Or:
" SET HANDLER: lcl_eventhandler=>handle_double_click FOR all instances.
CREATE OBJECT go_grid2
 EXPORTING
 i_parent = go_cell_bottom
 EXCEPTIONS
 OTHERS = 5.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* Display data
gs_layout-grid_title = 'Customers'.
CALL METHOD go_grid1->set_table_for_first_display
 EXPORTING
 i_structure_name = 'KNB1'
 is_layout = gs_layout
 CHANGING
 it_outtab = gt_knb1
 EXCEPTIONS
 OTHERS = 4.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
gs_layout-grid_title = 'Customers Details (Sales Areas)'.
CALL METHOD go_grid2->set_table_for_first_display
 EXPORTING
 i_structure_name = 'KNVV'
 is_layout = gs_layout
 CHANGING
 it_outtab = gt_knvv " empty !!!
 EXCEPTIONS
 OTHERS = 4.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* Link the docking container to the target dynpro
CALL METHOD go_docking->link
 EXPORTING
 repid = syst-repid
 dynnr = '0100'
* CONTAINER =
 EXCEPTIONS
 OTHERS = 4.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
* NOTE: dynpro does not contain any elements
CALL SCREEN '0100'.
* Flow logic of dynpro (does not contain any dynpro elements):
*PROCESS BEFORE OUTPUT.
* MODULE STATUS_0100.
*PROCESS AFTER INPUT.
* MODULE USER_COMMAND_0100.
END-OF-SELECTION.
*& Module STATUS_0100 OUTPUT
* text
MODULE status_0100 OUTPUT.
SET PF-STATUS 'STATUS_0100'. " contains push button "DETAIL"
* SET TITLEBAR 'xxx'.
* Refresh display of detail ALV list
CALL METHOD go_grid2->refresh_table_display
* EXPORTING
* IS_STABLE =
* I_SOFT_REFRESH =
 EXCEPTIONS
 OTHERS = 2.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
ENDMODULE. " STATUS_0100 OUTPUT
*& Module USER_COMMAND_0100 INPUT
* text
MODULE user_command_0100 INPUT.
CASE gd_okcode.
 WHEN 'BACK' OR
 'END' OR
 'CANC'.
 SET SCREEN 0. LEAVE SCREEN.
* User has pushed button "Display Details"
 WHEN 'DETAIL'.
 PERFORM entry_show_details.
 WHEN OTHERS.
ENDCASE.
CLEAR: gd_okcode.
ENDMODULE. " USER_COMMAND_0100 INPUT
*& Form ENTRY_SHOW_DETAILS
* text
* --> p1 text
* <-- p2 text
FORM entry_show_details .
* define local data
DATA:
 ld_row TYPE i,
 ls_knb1 TYPE knb1.
CALL METHOD go_grid1->get_current_cell
 IMPORTING
 e_row = ld_row.
READ TABLE gt_knb1 INTO ls_knb1 INDEX ld_row.
CHECK ( syst-subrc = 0 ).
SELECT * FROM knvv INTO TABLE gt_knvv
 WHERE kunnr = ls_knb1-kunnr.
ENDFORM. " ENTRY_SHOW_DETAILS
Regards
Uwe

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Hi Experts.
Plz give me some details for the following questions.
1. what is abstract class.
2. give me some example program using inheritance.
3. Some sample programs using events.
4. Narrow casting & wide casting.. And describe the use of it.
5. How to declare internal table in ABAP OOPS.
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HI
1. what is abstract class.
Abstract classes are normally used as an incomplete blueprint for concrete (that is, non-abstract) subclasses, for example to define a uniform interface.
Classes with at least one abstract method are themselves abstract.
Static methods and constructors cannot be abstract.
You can specify the class of the instance to be created explicitly: CREATE OBJECT <RefToAbstractClass> TYPE <NonAbstractSubclassName>.
Abstarct classes themselves cant be instantiated ( althrough their subclasses can)
Reference to abstract classes can refer to instance of subclass
Abstract (instance) methods are difined in the class , but not implemented
They must be redefined in subclasses
CLASS LC1 DEFINAITION ABSTARCT
PUBLIC SECTION
METHODS ESTIMATE ABSTARCT IMPORTING
ENDCLASS.
2. give me some example program using inheritance.
The following simple example shows the principle of inheritance within ABAP Objects. It is based on the Simple Introduction to Classes. A new class counter_ten inherits from the existing class counter.
REPORT demo_inheritance.
CLASS counter DEFINITION.
PUBLIC SECTION.
 METHODS: set IMPORTING value(set_value) TYPE i,
 increment,
 get EXPORTING value(get_value) TYPE i.
 PROTECTED SECTION .
 DATA count TYPE i.
ENDCLASS.
CLASS counter IMPLEMENTATION.
METHOD set.
 count = set_value.
ENDMETHOD.
METHOD increment.
 ADD 1 TO count.
ENDMETHOD.
METHOD get.
 get_value = count.
ENDMETHOD.
ENDCLASS.
CLASS counter_ten DEFINITION INHERITING FROM counter.
PUBLIC SECTION.
 METHODS increment REDEFINITION .
 DATA count_ten.
ENDCLASS.
CLASS counter_ten IMPLEMENTATION.
METHOD increment.
 DATA modulo TYPE I.
 CALL METHOD super->increment .
 write / count.
 modulo = count mod 10.
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 count_ten = count_ten + 1.
 write count_ten.
 ENDIF.
ENDMETHOD.
ENDCLASS.
DATA: count TYPE REF TO counter,
 number TYPE i VALUE 5.
START-OF-SELECTION.
 CREATE OBJECT count TYPE counter_ten .
CALL METHOD count->set EXPORTING set_value = number.
DO 20 TIMES.
 CALL METHOD count->increment.
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The example instantiates the subclass. The reference variable pointing to it has the type of the superclass. When the INCREMENT method is called using the superclass reference, the system executes the redefined method from the subclass.
3. Some sample programs using events.
Events in ABAP Objects - Example
The following example shows how to declare, call, and handle events in ABAP Objects.
Overview
This object works with the interactive list displayed below. Each user interaction triggers an event in ABAP Objects. The list and its data is created in the class C_LIST. There is a class STATUS for processing user actions. It triggers an event BUTTON_CLICKED in the AT USER-COMMAND event. The event is handled in the class C_LIST. It contains an object of the class C_SHIP or C_TRUCK for each line of the list. Both of these classes implement the interface I_VEHICLE. Whenever the speed of one of these objects changes, the event SPEED_CHANGE is triggered. The class C_LIST reacts to this and updates the list.
Constraints
The ABAP statements used for list processing are not yet fully available in ABAP Objects. However, to produce a simple test output, you can use the following statements:
WRITE [AT] /<offset>(<length>) <f>
ULINE
SKIP
NEW-LINE
Note: The behavior of formatting and interactive list functions in their current state are not guaranteed. Incompatible changes could occur in a future release.
Declarations
This example is implemented using local interfaces and classes. Below are the declarations of the interfaces and classes:
Interface and Class declarations
INTERFACE I_VEHICLE.
DATA MAX_SPEED TYPE I.
EVENTS SPEED_CHANGE EXPORTING VALUE(NEW_SPEED) TYPE I.
METHODS: DRIVE,
 STOP.
ENDINTERFACE.
CLASS C_SHIP DEFINITION.
PUBLIC SECTION.
METHODS CONSTRUCTOR.
INTERFACES I_VEHICLE.
PRIVATE SECTION.
ALIASES MAX FOR I_VEHICLE~MAX_SPEED.
DATA SHIP_SPEED TYPE I.
ENDCLASS.
CLASS C_TRUCK DEFINITION.
PUBLIC SECTION.
METHODS CONSTRUCTOR.
INTERFACES I_VEHICLE.
PRIVATE SECTION.
ALIASES MAX FOR I_VEHICLE~MAX_SPEED.
DATA TRUCK_SPEED TYPE I.
ENDCLASS.
CLASS STATUS DEFINITION.
PUBLIC SECTION.
 CLASS-EVENTS BUTTON_CLICKED EXPORTING VALUE(FCODE) LIKE SY-UCOMM.
CLASS-METHODS: CLASS_CONSTRUCTOR,
 USER_ACTION.
ENDCLASS.
CLASS C_LIST DEFINITION.
PUBLIC SECTION.
METHODS: FCODE_HANDLER FOR EVENT BUTTON_CLICKED OF STATUS
 IMPORTING FCODE,
 LIST_CHANGE FOR EVENT SPEED_CHANGE OF I_VEHICLE
 IMPORTING NEW_SPEED,
 LIST_OUTPUT.
PRIVATE SECTION.
DATA: ID TYPE I,
 REF_SHIP TYPE REF TO C_SHIP,
 REF_TRUCK TYPE REF TO C_TRUCK,
 BEGIN OF LINE,
 ID TYPE I,
 FLAG,
 IREF TYPE REF TO I_VEHICLE,
 SPEED TYPE I,
 END OF LINE,
 LIST LIKE SORTED TABLE OF LINE WITH UNIQUE KEY ID.
ENDCLASS.
The following events are declared in the example:
The instance event SPEED_CHANGE in the interface I_VEHICLE
The static event BUTTON_CLICKED in the class STATUS.
The class C_LIST contains event handler methods for both events.
Note that the class STATUS does not have any attributes, and therefore only works with static methods and events.
Implementations
Below are the implementations of the methods of the above classes:
Implementations
CLASS C_SHIP IMPLEMENTATION.
METHOD CONSTRUCTOR.
 MAX = 30.
ENDMETHOD.
METHOD I_VEHICLE~DRIVE.
 CHECK SHIP_SPEED < MAX.
 SHIP_SPEED = SHIP_SPEED + 10.
 RAISE EVENT I_VEHICLE~SPEED_CHANGE
 EXPORTING NEW_SPEED = SHIP_SPEED.
ENDMETHOD.
METHOD I_VEHICLE~STOP.
 CHECK SHIP_SPEED > 0.
 SHIP_SPEED = 0.
 RAISE EVENT I_VEHICLE~SPEED_CHANGE
 EXPORTING NEW_SPEED = SHIP_SPEED.
ENDMETHOD.
ENDCLASS.
CLASS C_TRUCK IMPLEMENTATION.
METHOD CONSTRUCTOR.
 MAX = 150.
ENDMETHOD.
METHOD I_VEHICLE~DRIVE.
 CHECK TRUCK_SPEED < MAX.
 TRUCK_SPEED = TRUCK_SPEED + 50.
 RAISE EVENT I_VEHICLE~SPEED_CHANGE
 EXPORTING NEW_SPEED = TRUCK_SPEED.
ENDMETHOD.
METHOD I_VEHICLE~STOP.
 CHECK TRUCK_SPEED > 0.
 TRUCK_SPEED = 0.
 RAISE EVENT I_VEHICLE~SPEED_CHANGE
 EXPORTING NEW_SPEED = TRUCK_SPEED.
ENDMETHOD.
ENDCLASS.
CLASS STATUS IMPLEMENTATION.
METHOD CLASS_CONSTRUCTOR.
 SET PF-STATUS 'VEHICLE'.
 WRITE 'Click a button!'.
ENDMETHOD.
METHOD USER_ACTION.
 RAISE EVENT BUTTON_CLICKED EXPORTING FCODE = SY-UCOMM.
ENDMETHOD.
ENDCLASS.
CLASS C_LIST IMPLEMENTATION.
METHOD FCODE_HANDLER .
 CLEAR LINE.
 CASE FCODE.
 WHEN 'CREA_SHIP'.
 ID = ID + 1.
 CREATE OBJECT REF_SHIP.
 LINE-ID = ID.
 LINE-FLAG = 'C'.
 LINE-IREF = REF_SHIP.
 APPEND LINE TO LIST.
 WHEN 'CREA_TRUCK'.
 ID = ID + 1.
 CREATE OBJECT REF_TRUCK.
 LINE-ID = ID.
 LINE-FLAG = 'T'.
 LINE-IREF = REF_TRUCK.
 APPEND LINE TO LIST.
 WHEN 'DRIVE'.
 CHECK SY-LILLI > 0.
 READ TABLE LIST INDEX SY-LILLI INTO LINE.
 CALL METHOD LINE-IREF->DRIVE.
 WHEN 'STOP'.
 LOOP AT LIST INTO LINE.
 CALL METHOD LINE-IREF->STOP.
 ENDLOOP.
 WHEN 'CANCEL'.
 LEAVE PROGRAM.
 ENDCASE.
 CALL METHOD LIST_OUTPUT.
ENDMETHOD.
METHOD LIST_CHANGE .
 LINE-SPEED = NEW_SPEED.
 MODIFY TABLE LIST FROM LINE.
ENDMETHOD.
METHOD LIST_OUTPUT.
 SY-LSIND = 0.
 SET TITLEBAR 'TIT'.
 LOOP AT LIST INTO LINE.
 IF LINE-FLAG = 'C'.
 WRITE / ICON_WS_SHIP AS ICON.
 ELSEIF LINE-FLAG = 'T'.
 WRITE / ICON_WS_TRUCK AS ICON.
 ENDIF.
 WRITE: 'Speed = ', LINE-SPEED.
 ENDLOOP.
ENDMETHOD.
ENDCLASS.
The static method USER_ACTION of the class STATUS triggers the static event BUTTON_CLICKED. The instance methods I_VEHICLEDRIVE and I_VEHICLESTOP trigger the instance event I_VEHICLE~SPEED_CHANGE in the classes C_SHIP and C_TRUCK.
Using the Classes in a Program
The following program uses the above classes:
REPORT OO_EVENTS_DEMO NO STANDARD PAGE HEADING.
Global data of program
DATA LIST TYPE REF TO C_LIST.
Program events
START-OF-SELECTION.
CREATE OBJECT LIST.
SET HANDLER: LIST->FCODE_HANDLER,
 LIST->LIST_CHANGE FOR ALL INSTANCES.
AT USER-COMMAND.
CALL METHOD STATUS=>USER_ACTION.
The program creates an object of the class C_LIST and registers the event handler method FCODE_HANDLER of the object for the class event BUTTON_CLICKED, and the event handler method LIST_CHANGE for the event SPEED_CHANGE of all instances that implement the interface I_VEHICLE.
4. Narrow casting & wide casting.. And describe the use of it.
Narrowing Cast
The assignment of a subclass instance to a reference variable of the type "reference to superclass" is described as a narrowing cast, because you are switching from a more detailed view to a one with less detail.
Description up-cast is also used.
use
A user who is not interested in the finer points of cars, trucks, and busses (but only, for example, in the fuel consumption and tank gauge) does not need to know about them. This user only wants and needs to work with (references to) the lcl_vehicle class. However, in order to allow the user to work with cars, busses, or trucks, you generally need a narrowing cast.
Widening cast
The widening cast logically represents the opposite of the narrowing cast. The widening cast cannot be checked statically, only at runtime. The Cast Operator ?= (or the equivalent MOVE ... ?TO ) must be used to make this visible.
It changes from a less detailed view to one with more detail.
use
The client, the car rental company wants to execute a function for specific vehicles form the list (vehicle_list). For example, the client wants to ascertain the truck with the largest cargo capacity. However, not all vehicles are in the trucks list, it also includes references to cars and busses.
5. How to declare internal table in ABAP OOPS.
BEGIN OF LINE,
 ID TYPE I,
 FLAG,
 IREF TYPE REF TO I_VEHICLE,
 SPEED TYPE I,
 END OF LINE,
6. What is the use of table type.?
Please check the SAP help , as all these things are provided in detail in it .
In case you find it difficult to find it or search for it here is the link
http://help.sap.com/saphelp_nw04/helpdata/en/90/8d7304b1af11d194f600a0c929b3c3/frameset.htm
7. What is instance.?
Instance methods are called using CALL METHOD <reference>-><instance_method>.
Static methods (also referred to as class methods) are called using CALL METHOD <classname>=><class_method>.
If you are calling a static method from within the class, you can omit the class name.
You access instance attributes using <instance>-><instance_attribute>
8. Explain friend class.
In rare cases, classes have to work together so closely that they need access to their protected and private components. To avoid making these components available to all users, there is the concept of friendship between classes.
To do this you use the FRIENDS additions to the CLASS statement, in which all classes and interfaces that are to be provided friendship are listed
In principle, providing friendship is one-sided: A class providing friendship is not automatically a friend of its friends. If a class providing friendship wants to access the non-public components of a friend, this friend has to explicitly provide friendship to it.
Classes that inherit from friends and interfaces that contain a friend as a component interface also become friends. However, providing friendship, unlike the attribute of being a friend, is not inherited. A friend of a superclass is therefore not automatically a friend of its subclasses.
Reward if usefull

Event handler method

Hi all,
I want to know the significance of creating event handler method in Class builder.
and how it can be used at the time of event trigger.( Is it called automatically or programmer need to call it explicitly in the program.)
Thanks,
Sushant singh

Hi Sushant,
1. In ABAP Objects, triggering and handling an event means that certain methods act as triggers and trigger events, to which other methods - the handlers - react. This means that the handler methods are executed when the event occurs.
2.To trigger an event, a class must
Declare the event in its declaration part
Trigger the event in one of its methods
3.You declare events in the declaration part of a class or in an interface. To declare instance events, use the following statement:
EVENTS evt EXPORTING... VALUE(e1 e2 ...) TYPE type [OPTIONAL]..
4. An instance event in a class can be triggered by any instance method in the class. Static events can be triggered by any method. However, static methods can only trigger static events. To trigger an event in a method, use the following statement:
RAISE EVENT evt EXPORTING e1 = f1 e2 = f2 ...
5. Events are handled using special methods. To handle an event, a method must
be defined as an event handler method for that event
be registered at runtime for the event.
Declaring Event Handler Methods
Any class can contain event handler methods for events from other classes. You can, of course, also define event handler methods in the same class as the event itself. To declare an event handler method, use the following statement:
METHODS meth FOR EVENT evt OF cif IMPORTING e1 e2 ...
6. Registering Event Handler Methods
To allow an event handler method to react to an event, you must determine at runtime the trigger to which it is to react. You can do this with the following statement:
SET HANDLER h1 h2 ... [FOR]...
It links a list of handler methods with corresponding trigger methods. There are four different types of event.
7. Timing of Event Handling
After the RAISE EVENTstatement, all registered handler methods are executed before the next statement is processed (synchronous event handling). If a handler method itself triggers events, its handler methods are executed before the original handler method continues. To avoid the possibility of endless recursion, events may currently only be nested 64 deep.
Handler methods are executed in the order in which they were registered. Since event handlers are registered dynamically, you should not assume that they will be processed in a particular order. Instead, you should program as though all event handlers will be executed simultaneously.
Reward if useful.

ALV Tree Report without using ABAP Objects

Hi all,
I want to know the name of a function module to create ALV Tree in SE38 as a report. I am required to create this ALV Tree Report without using ABAP OBJECTS. Can u pls help me as early as possible.

Hi
see this link
http://www.sapdev.co.uk/reporting/alv/alvtree.htm
*& Report ZBCALV_TREE
REPORT ZBCALV_TREE.
class cl_gui_column_tree definition load.
class cl_gui_cfw definition load.
data tree1 type ref to cl_gui_alv_tree.
data mr_toolbar type ref to cl_gui_toolbar.
include <icon>.
include bcalv_toolbar_event_receiver.
include bcalv_tree_event_receiver.
data: toolbar_event_receiver type ref to lcl_toolbar_event_receiver.
data: gt_VBAK type VBAK occurs 0, "Output-Table
 gt_fieldcatalog type lvc_t_fcat, "Fieldcatalog
 ok_code like sy-ucomm. "OK-Code
start-of-selection.
end-of-selection.
call screen 100.
*& Module STATUS_0100 OUTPUT
 text
module STATUS_0100 output.
SET PF-STATUS 'MAIN'.
if tree1 is initial.
 perform Zinit_tree.
endif.
call method cl_gui_cfw=>flush.
endmodule. " STATUS_0100 OUTPUT
*& Form Zinit_tree
 text
--> p1 text
<-- p2 text
form Zinit_tree .
perform Zbuild_fieldcatalog.
create container for alv-tree
data: l_tree_container_name(30) type c,
 l_custom_container type ref to cl_gui_custom_container.
l_tree_container_name = 'TREE1'.
if sy-batch is initial.
 create object l_custom_container
 exporting
 container_name = l_tree_container_name
 exceptions
 cntl_error = 1
 cntl_system_error = 2
 create_error = 3
 lifetime_error = 4
 lifetime_dynpro_dynpro_link = 5.
 if sy-subrc <> 0.
 message x208(00) with 'ERROR'. "#EC NOTEXT
 endif.
endif.
create tree control
create object tree1
 exporting
 parent = l_custom_container
 node_selection_mode = cl_gui_column_tree=>node_sel_mode_single
 item_selection = 'X'
 no_html_header = ''
 no_toolbar = ''
 exceptions
 cntl_error = 1
 cntl_system_error = 2
 create_error = 3
 lifetime_error = 4
 illegal_node_selection_mode = 5
 failed = 6
 illegal_column_name = 7.
if sy-subrc <> 0.
 message x208(00) with 'ERROR'. "#EC NOTEXT
endif.
create Hierarchy-header
data l_hierarchy_header type treev_hhdr.
perform zbuild_hierarchy_header changing l_hierarchy_header.
create info-table for html-header
data: lt_list_commentary type slis_t_listheader,
 l_logo type sdydo_value.
perform Zbuild_comment using
 lt_list_commentary
 l_logo.
repid for saving variants
data: ls_variant type disvariant.
ls_variant-report = sy-repid.
create emty tree-control
call method tree1->set_table_for_first_display
 exporting
 is_hierarchy_header = l_hierarchy_header
 it_list_commentary = lt_list_commentary
 i_logo = l_logo
 i_background_id = 'ALV_BACKGROUND'
 i_save = 'A'
 is_variant = ls_variant
 changing
 it_outtab = gt_VBAK "table must be emty !!
 it_fieldcatalog = gt_fieldcatalog.
create hierarchy
perform Zcreate_hierarchy.
add own functioncodes to the toolbar
perform zchange_toolbar.
register events
perform zregister_events.
endform. " Zinit_tree
*& Form Zbuild_fieldcatalog
 text
--> p1 text
<-- p2 text
form Zbuild_fieldcatalog .
get fieldcatalog
call function 'LVC_FIELDCATALOG_MERGE'
 exporting
 i_structure_name = 'VBAK'
 changing
 ct_fieldcat = gt_fieldcatalog.
sort gt_fieldcatalog by scrtext_l.
change fieldcatalog
data: ls_fieldcatalog type lvc_s_fcat.
loop at gt_fieldcatalog into ls_fieldcatalog.
 case ls_fieldcatalog-fieldname.
 when 'AUART' .
 ls_fieldcatalog-no_out = 'X'.
 ls_fieldcatalog-key = ''.
 endcase.
 modify gt_fieldcatalog from ls_fieldcatalog.
endloop.
endform. " Zbuild_fieldcatalog
*& Form zbuild_hierarchy_header
 text
 <--P_L_HIERARCHY_HEADER text
form zbuild_hierarchy_header changing
 p_hierarchy_header type treev_hhdr.
p_hierarchy_header-heading = 'Hierarchy Header'. "#EC NOTEXT
p_hierarchy_header-tooltip =
 'This is the Hierarchy Header !'. "#EC NOTEXT
p_hierarchy_header-width = 30.
p_hierarchy_header-width_pix = ''.
endform. " zbuild_hierarchy_header
*& Form Zbuild_comment
 text
 -->P_LT_LIST_COMMENTARY text
 -->P_L_LOGO text
form Zbuild_comment using
 pt_list_commentary type slis_t_listheader
 p_logo type sdydo_value.
data: ls_line type slis_listheader.
LIST HEADING LINE: TYPE H
clear ls_line.
ls_line-typ = 'H'.
LS_LINE-KEY: NOT USED FOR THIS TYPE
ls_line-info = 'ALV-tree-demo: flight-overview'. "#EC NOTEXT
append ls_line to pt_list_commentary.
STATUS LINE: TYPE S
clear ls_line.
ls_line-typ = 'S'.
ls_line-key = 'valid until'. "#EC NOTEXT
ls_line-info = 'January 29 1999'. "#EC NOTEXT
append ls_line to pt_list_commentary.
ls_line-key = 'time'.
ls_line-info = '2.00 pm'. "#EC NOTEXT
append ls_line to pt_list_commentary.
ACTION LINE: TYPE A
clear ls_line.
ls_line-typ = 'A'.
LS_LINE-KEY: NOT USED FOR THIS TYPE
ls_line-info = 'actual data'. "#EC NOTEXT
append ls_line to pt_list_commentary.
p_logo = 'ENJOYSAP_LOGO'.
endform. " Zbuild_comment
*& Form Zcreate_hierarchy
 text
--> p1 text
<-- p2 text
form Zcreate_hierarchy .
data: ls_vbak type vbak,
 lt_vbak type vbak occurs 0.
get data
select * from vbak into table lt_vbak
 up to 200 rows . "#EC CI_NOWHERE
sort lt_vbak by AUART.
add data to tree
data: l_AUART_key type lvc_nkey.
loop at lt_vbak into ls_vbak.
 on change of ls_vbak-AUART.
 perform Zadd_AUART_line using ls_vbak
 changing l_AUART_key.
 endon.
endloop.
calculate totals
call method tree1->update_calculations.
this method must be called to send the data to the frontend
call method tree1->frontend_update.
endform. " Zcreate_hierarchy
*& Form Zadd_AUART_line
 text
 -->P_LS_vbak text
 -->P_0379 text
 <--P_L_AUART_KEY text
form Zadd_AUART_line using p_ls_vbak type vbak
 p_relat_key type lvc_nkey
 changing p_node_key type lvc_nkey.
data: l_node_text type lvc_value,
 ls_vbak type vbak.
set item-layout
data: lt_item_layout type lvc_t_layi,
 ls_item_layout type lvc_s_layi.
ls_item_layout-t_image = '@3P@'.
ls_item_layout-fieldname = tree1->c_hierarchy_column_name.
ls_item_layout-style =
 cl_gui_column_tree=>style_intensifd_critical.
append ls_item_layout to lt_item_layout.
add node
l_node_text = p_ls_vbak-AUART.
data: ls_node type lvc_s_layn.
ls_node-n_image = space.
ls_node-exp_image = space.
call method tree1->add_node
 exporting
 i_relat_node_key = p_relat_key
 i_relationship = cl_gui_column_tree=>relat_last_child
 i_node_text = l_node_text
 is_outtab_line = ls_vbak
 is_node_layout = ls_node
 it_item_layout = lt_item_layout
 importing
 e_new_node_key = p_node_key .
endform. " Zadd_AUART_line
*& Form zchange_toolbar
 text
--> p1 text
<-- p2 text
form zchange_toolbar .
get toolbar control
call method tree1->get_toolbar_object
 importing
 er_toolbar = mr_toolbar.
check not mr_toolbar is initial.
add seperator to toolbar
call method mr_toolbar->add_button
 exporting
 fcode = ''
 icon = ''
 butn_type = cntb_btype_sep
 text = ''
 quickinfo = 'This is a Seperator'. "#EC NOTEXT
add Standard Button to toolbar (for Delete Subtree)
call method mr_toolbar->add_button
 exporting
 fcode = 'DELETE'
 icon = '@18@'
 butn_type = cntb_btype_button
 text = ''
 quickinfo = 'Delete subtree'. "#EC NOTEXT
add Dropdown Button to toolbar (for Insert Line)
call method mr_toolbar->add_button
 exporting
 fcode = 'INSERT_LC'
 icon = '@17@'
 butn_type = cntb_btype_dropdown
 text = ''
 quickinfo = 'Insert Line'. "#EC NOTEXT
set event-handler for toolbar-control
create object toolbar_event_receiver.
set handler toolbar_event_receiver->on_function_selected
 for mr_toolbar.
set handler toolbar_event_receiver->on_toolbar_dropdown
 for mr_toolbar.
endform. " zchange_toolbar
*& Form zregister_events
 text
--> p1 text
<-- p2 text
form zregister_events .
define the events which will be passed to the backend
data: lt_events type cntl_simple_events,
 l_event type cntl_simple_event.
define the events which will be passed to the backend
l_event-eventid = cl_gui_column_tree=>eventid_expand_no_children.
append l_event to lt_events.
l_event-eventid = cl_gui_column_tree=>eventid_checkbox_change.
append l_event to lt_events.
l_event-eventid = cl_gui_column_tree=>eventid_header_context_men_req.
append l_event to lt_events.
l_event-eventid = cl_gui_column_tree=>eventid_node_context_menu_req.
append l_event to lt_events.
l_event-eventid = cl_gui_column_tree=>eventid_item_context_menu_req.
append l_event to lt_events.
l_event-eventid = cl_gui_column_tree=>eventid_header_click.
append l_event to lt_events.
l_event-eventid = cl_gui_column_tree=>eventid_item_keypress.
append l_event to lt_events.
call method tree1->set_registered_events
 exporting
 events = lt_events
 exceptions
 cntl_error = 1
 cntl_system_error = 2
 illegal_event_combination = 3.
if sy-subrc <> 0.
 message x208(00) with 'ERROR'. "#EC NOTEXT
endif.
set Handler
data: l_event_receiver type ref to lcl_tree_event_receiver.
create object l_event_receiver.
set handler l_event_receiver->handle_node_ctmenu_request
 for tree1.
set handler l_event_receiver->handle_node_ctmenu_selected
 for tree1.
set handler l_event_receiver->handle_item_ctmenu_request
 for tree1.
set handler l_event_receiver->handle_item_ctmenu_selected
 for tree1.
endform. " zregister_events
*& Module USER_COMMAND_0100 INPUT
 text
module USER_COMMAND_0100 input.
ok_code = sy-ucomm.
clear sy-ucomm.
case ok_code.
 when 'EXIT' or 'BACK' or 'CANC'.
 perform Zexit_program.
 when others.
 call method cl_gui_cfw=>dispatch.
endcase.
clear ok_code.
call method cl_gui_cfw=>flush.
endmodule. " USER_COMMAND_0100 INPUT
*& Form Zexit_program
 text
--> p1 text
<-- p2 text
form Zexit_program .
call method tree1->free.
leave program.
endform. " Zexit_program
Reward if usefull

What is an event handler..?

I'm trying to learn how to make responsiveness UI. I've read that I can not use SwingUtilities.invokeLater() method if I am in a event handler. The question can seems stupid but I'm only a beginner: what is a event handler? From what I know it might be the actionPerformed method..is it right? Could somebody give me an example? thanks!

Basically an event handler is a class that performs code.
It can be any class (even the same that fires the event), but it has to implement the proper interface for the event you want to catch. If you want to perform special code when someone clicks on a button you want to catch an Action, therefor you need an ActionListener, a class that either implements the ActionListener interface (and therefor the method actionPerformed) or your class has to extend AbstractAction (and therefor has an actionPerformed, too).
It you want to perform special code when someone chooses an element from a list, you want to be informed about a ListSelectionEvent and therefor need a class that implements the ListSelectionListener Interface (and provides the method selectionChanged).
The class that should react on the event has to be declared as being a listener to the object that fires the events. So an actionListener on a Button would be added by
button.addActionListener(listener);or
button.setAction(action);(Note that all variables used are just for clarifiing the type you need and have to be exchanged by the names of your declared objects)
There are many more events ... really, read the tutorial!

Can DISABLE preProcess Event Handler add to the Orchestration parameters?

I have a DISABLE pre-process event handler defined on the User object. I need to set the current date on a USR UDF attribute whenever the user is disabled or enabled or created. The CREATE handler works and the date value shows up on the user profile. However, when I try to set this attribute on the pre-process DISABLE or ENABLE event handlers, the new date does not show up. Here is the code I am using in my DISABLE/ENABLE event handler:
Date currentTime = new Date(System.currentTimeMillis());
orchestration.addParameter(USER_STATUS_DATETIME_ATTR_NAME, currentTime);
Where the orchestration object is from the execute() parameter list.
Any ideas as to why this is not working? Is adding to the orchestration not allowed for DISABLE or ENABLE event handlers? I know my handler is getting calls as I am logging the orchestration.getOperation() value.
Thanks for any suggestions.
-Dave
Edited by: user552098 on Nov 12, 2012 1:56 PM

When you update the field, make sure you are using the field label name, and not the UDF value.
-Kevin

Declaring the internal table in ABAP objects

Hi every1,
Please any one let me know how to declare an internal table in class (ABAP objects). Bcos i am new to this classes.
help me out.
Regards,
Madhavi

Hi,
Check this example..
TYPES: BEGIN OF TYPE_DATA,
               MATNR TYPE MATNR,
               WERKS TYPE WERKS_D,
             END OF TYPE_DATA.
DATA: T_DATA TYPE STANDARD TABLE OF TYPE_DATA.
DATA: WA_DATA TYPE TYPE_DATA.
Adding rows to the internal table.
WA_DATA-MATNR = 'AA'.
APPEND WA_DATA TO T_DATA.
Processing the interna table
LOOP AT T_DATA INTO WA_DATA.
ENDLOOP.
Thanks,
Naren

Event handling in global class (abap object)

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