topic Re: ALV tree using Objects in Application Development and Automation Discussions

ALV tree using Objects

Former Member — Mon, 27 Jun 2005 14:30:16 GMT

Hi,

I am making an ALV tree using objects and the code is crashing due to an error in the Screen 100 ( which I am using ). I tried to implement the example provided at http://www.sapdevelopment.co.uk/reporting/alv/alvtree.htm but that is not working.

Can anyone please tell me a working example or a brief tutorial so that I can correct the logical errors in my code.

Thanks,

Gaurav

Re: ALV tree using Objects

Former Member — Mon, 27 Jun 2005 14:37:30 GMT

Hi Gaurav,

Below r the links which helps u in detail for creating a alv report using oops.

http://www.sapgenie.com/abap/controls/alvgrid.htm

http://www.sapgenie.com/abap/controls/alvgrid.htm#Refresh%20grid%20display

sample example on alv tree....<b>BCALV_GRID_DND_TREE_SIMPLE</b>


REPORT BCALV_GRID_DND_TREE_SIMPLE.
* global data, tables, Constants, types
INCLUDE GRID_DND_TREE_SIMPLE_TOP.
* icons
INCLUDE <ICON>.
* event receiver ALV grid
INCLUDE GRID_DND_TREE_SIMPLE_01.
* event receiver ALV tree simple
INCLUDE GRID_DND_TREE_SIMPLE_02.
* forms for BCALV_GRID_DND_TREE_SIMPLE
INCLUDE GRID_DND_TREE_SIMPLE_F01.
*----------------------------------------------------------------------*
START-OF-SELECTION.
  PERFORM INIT_DRAGDROP.
* table SPFLI
  REFRESH GT_SPFLI.
  SELECT * FROM SPFLI INTO TABLE GT_SPFLI.
* table SCARR
  REFRESH GT_SCARR.
  SELECT * FROM SCARR INTO TABLE GT_SCARR.
*
END-OF-SELECTION.
  G_REPID = SY-REPID.
  CALL SCREEN 100.

*&---------------------------------------------------------------------*
*&      Module  STATUS_0100  OUTPUT
*&---------------------------------------------------------------------*
MODULE STATUS_0100 OUTPUT.
  SET PF-STATUS '100'.
  SET TITLEBAR '100'.
ENDMODULE.                             " STATUS_0100  OUTPUT

*&---------------------------------------------------------------------*
*&      Module  STATUS_0200  OUTPUT
*&---------------------------------------------------------------------*
MODULE STATUS_0200 OUTPUT.
  SET PF-STATUS '200'.
  SET TITLEBAR '200'.
ENDMODULE.                             " STATUS_0200  OUTPUT
*&---------------------------------------------------------------------*
*&      Module  TREE_AND_DOCKING  OUTPUT
*&---------------------------------------------------------------------*
MODULE TREE_AND_DOCKING OUTPUT.
  IF CONTROLS_CREATED IS INITIAL.
*   docking control
    PERFORM CREATEDOCKINGCONTROL.
*   tree control
    PERFORM CREATETREECONTROL.
    CONTROLS_CREATED = SELECTED.
  ENDIF.
ENDMODULE.                             " TREE_AND_DOCKING  OUTPUT

*&---------------------------------------------------------------------*
*&      Module  ALV_DISPLAY  OUTPUT
*&---------------------------------------------------------------------*
MODULE ALV_DISPLAY OUTPUT.
  IF G_CUSTOM_CONTAINER IS INITIAL.
*   create container for ALV grid
    CREATE OBJECT G_CUSTOM_CONTAINER
       EXPORTING
         CONTAINER_NAME = 'CUSTOM_CONTROL'.
  ENDIF.
  IF GRID IS INITIAL.
*   create Event Receiver
    CREATE OBJECT EVENT_RECEIVER.
*   build sort_tab_grid
    PERFORM BUILD_SORT_TAB_GRID.
*   create ALV grid
    CREATE OBJECT GRID
       EXPORTING
         I_APPL_EVENTS = SELECTED      "application event
         I_PARENT = G_CUSTOM_CONTAINER.
*   Dummy entry for D'n'D
    CLEAR GT_SFLIGHT.
    APPEND GT_SFLIGHT.
*   opt. col. width
    GS_LAYOUT_ALV-CWIDTH_OPT = SELECTED.
*   handle for D'n'D
    GS_LAYOUT_ALV-S_DRAGDROP-ROW_DDID = G_HANDLE_ALV.
*   handler for ALV grid
    SET HANDLER EVENT_RECEIVER->HANDLE_TOOLBAR_SET  FOR GRID.
    SET HANDLER EVENT_RECEIVER->HANDLE_USER_COMMAND FOR GRID.
    SET HANDLER EVENT_RECEIVER->HANDLE_DOUBLE_CLICK FOR GRID.
    SET HANDLER EVENT_RECEIVER->HANDLE_CONTEXT_MENU FOR GRID.
    SET HANDLER EVENT_RECEIVER->HANDLE_ONDROP FOR GRID.
*   first call with dummy entry
    CALL METHOD GRID->SET_TABLE_FOR_FIRST_DISPLAY
         EXPORTING I_STRUCTURE_NAME = 'SFLIGHT'
                   IS_LAYOUT        = GS_LAYOUT_ALV
         CHANGING  IT_SORT          = GT_SORT_GRID[]
                   IT_OUTTAB        = GT_SFLIGHT[].
*   flush
    CALL METHOD CL_GUI_CONTROL=>SET_FOCUS EXPORTING CONTROL = GRID.
    CALL METHOD CL_GUI_CFW=>FLUSH.
  ENDIF.
  IF FLG_NEW = SELECTED.
    CLEAR FLG_NEW.
*   first call with data
    GS_LAYOUT_ALV-GRID_TITLE = SCARR-CARRNAME.
    CALL METHOD GRID->SET_TABLE_FOR_FIRST_DISPLAY
         EXPORTING I_STRUCTURE_NAME = 'SFLIGHT'
                   IS_LAYOUT        = GS_LAYOUT_ALV
         CHANGING  IT_SORT          = GT_SORT_GRID[]
                   IT_OUTTAB        = GT_SFLIGHT[].
*   reset fields on screen 100
    CLEAR SAPLANE.
*   flush
    CALL METHOD CL_GUI_CONTROL=>SET_FOCUS EXPORTING CONTROL = GRID.
    CALL METHOD CL_GUI_CFW=>FLUSH.
  ENDIF.
ENDMODULE.                             " ALV_DISPLAY  OUTPUT

*&---------------------------------------------------------------------*
*&      Module  OK_CODE  INPUT
*&---------------------------------------------------------------------*
MODULE OK_CODE INPUT.
  SAVE_OK_CODE = OK_CODE.
  CLEAR OK_CODE.
  CASE SAVE_OK_CODE.
*   Exit program
    WHEN FCODE_BACK OR
         FCODE_END  OR
         FCODE_ESC.
      CALL METHOD GRID->FREE.
      CALL METHOD TREE1->FREE.
      CALL METHOD G_CUSTOM_CONTAINER->FREE.
      LEAVE PROGRAM.
    WHEN OTHERS.
      CALL METHOD CL_GUI_CFW=>DISPATCH.
  ENDCASE.
ENDMODULE.                             " OK_CODE  INPUT

*&---------------------------------------------------------------------*
*&      Module  USER_COMMAND_0200  INPUT
*&---------------------------------------------------------------------*
MODULE USER_COMMAND_0200 INPUT.
  SAVE_OK_CODE = OK_CODE.
  CLEAR OK_CODE.
* leave screen 200
  IF SAVE_OK_CODE = FCODE_ENTR OR
     SAVE_OK_CODE = FCODE_ESC.
    SET SCREEN 0. LEAVE SCREEN.
  ENDIF.
ENDMODULE.                             " USER_COMMAND_0200  INPUT

*&---------------------------------------------------------------------*
*&      Module  HIDE_SAPLANE  OUTPUT
*&---------------------------------------------------------------------*
MODULE HIDE_SAPLANE OUTPUT.
  LOOP AT SCREEN.
    IF SCREEN-GROUP1 = 'F01' AND SAPLANE IS INITIAL.
      SCREEN-ACTIVE = '0'.
      MODIFY SCREEN.
    ENDIF.
  ENDLOOP.
ENDMODULE.                             " HIDE_SAPLANE  OUTPUT

regards,

venu.

Re: ALV tree using Objects

Former Member — Mon, 27 Jun 2005 15:24:13 GMT

Some ALV tree sample for you in the OO way.

try to find the sap sample program BCALV_TREE_XX

These are serial samples for ALV tree.

Hope it will be helpful

Re: ALV tree using Objects

Former Member — Mon, 27 Jun 2005 17:58:32 GMT

Hi Zhenglin,

Do I need populate data myself as the examples you have mentioned show the basic structure without any data.

Thanks,

Gaurav

Re: ALV tree using Objects

Former Member — Tue, 28 Jun 2005 02:10:50 GMT

Hi, I just mean you can reference those sample code to understand how to create, initial and register event handle of the ALV_TREE.

The ALV_TREE has some difference between the ALV_GRID in OO programming, especially in some of the GUI effect.

Re: ALV tree using Objects

Former Member — Tue, 28 Jun 2005 04:23:23 GMT

Hi,

Check whether u have uncommented the PAI and PBO modules.

Try this one.

REPORT ZZZTEST_3

NO STANDARD PAGE HEADING

MESSAGE-ID zcs_cs_001.

************************************************************************

1/ Report Name: ZZZ_ALV_TREE_DEMO

************************************************************************

The definition and implementation of the event reciever class

include <icon>.

Predefine a local class for event handling to allow the
declaration of a reference variable before the class is defined.

class lcl_event_receiver definition deferred.

data :

Alv Containers
tree definition

o_tree type ref to cl_gui_simple_tree,

Event Handler

o_eventreceiver type ref to lcl_event_receiver,

o_dockingcontainer TYPE REF TO cl_gui_docking_container.

data :

node structures for tree building

i_nodes type table of abdemonode, " node table def create bespoke

w_nodes like line of i_nodes, " work area

i_tree_event type cntl_simple_events, " Itab for Tree Events

w_tree_event type cntl_simple_event. " Work area for Tree Events

data:

v_ratio1 type i, "docking container screen area

container screen area

v_action(12) type c.

Internal Tables Used for Object ALV Display.

data:

i_toolbar type table of stb_button, "Tool bar for Grid1

i_exclude1 type ui_functions,

i_exclude2 type ui_functions,

i_groups type lvc_t_sgrp, " Group Definitions

i_selected_rows type lvc_t_row. " Select row type

constants: c_x(1) type c value 'X', "Checked

c_a(1) type c value 'A'. "All Layouts

----

CLASS lcl_event_receiver DEFINITION

----

........ *

----

class lcl_event_receiver definition.

event receiver definitions for ALV actions

public section.

class-methods:

Status bar

handle_user_command

for event user_command of cl_gui_alv_grid

importing e_ucomm,

Tree Actions

handle_node_double_click

for event node_double_click of cl_gui_simple_tree

importing node_key,

Row Double click for dirll down.

handle_double_click

for event double_click of cl_gui_alv_grid

importing e_row

e_column

es_row_no.

endclass.

Implementation

************************************************************************

Every event handler that is specified below should also be set after
the object has been created. This is done in the PBO processing.
with the following command
SET HANDLER oEventreceiver->handle_toolbar FOR o_Alvgrid.

************************************************************************

class lcl_event_receiver implementation.

method handle_user_command.

In event handler method for event USER_COMMAND: Query your
function codes defined in step 2 and react accordingly.

endmethod.

&----

*& Method handle_double_click

&----

This method is called when the user double clicks on a line to drill
down.
The following are exported from the ALV
LVC_S_ROW
LVC_S_COL
LVC_S_ROID

----

method handle_double_click.

The double click drill down processing should be
coded in the form below.

endmethod.

----

*& Method handle_node_double_click

&----

This method handles the node double click event of the tree
LVC_S_ROW
LVC_S_COL
LVC_S_ROID

----

method handle_node_double_click.

perform f9903_handle_node_double_click using node_key.

endmethod.

endclass.

************************************************************************

INITIALIZATION

************************************************************************

INITIALIZATION.

PERFORM f050_initialize_values.

FORM f050_initialize_values.

v_ratio1 = 30. "tree size

ENDFORM. " f050_initialize_values

************************************************************************

START-OF-SELECTION

************************************************************************

START-OF-SELECTION.

************************************************************************

END-OF-SELECTION

************************************************************************

END-OF-SELECTION.

CALL SCREEN 9001.

*Data Selection

FORM f9000_objects_create USING value(pobject)

pparent

value(pratio)

value(prows)

value(pcolumns).

CASE pobject.

WHEN 'o_dockingcontainer'.

IF o_dockingcontainer IS INITIAL.

CREATE OBJECT o_dockingcontainer

EXPORTING

side = v_dock_side1

ratio = pratio "amount of screen

EXCEPTIONS

cntl_error = 1

cntl_system_error = 2

create_error = 3

lifetime_error = 4

lifetime_dynpro_dynpro_link = 5

others = 6.

PERFORM f9800_error_handle USING text-e06.

ENDIF.

WHEN 'o_tree'.

IF o_tree IS INITIAL.

CREATE OBJECT o_tree

EXPORTING

LIFETIME =

parent = pparent

SHELLSTYLE =

node_selection_mode = o_tree->node_sel_mode_single

HIDE_SELECTION =

name = 'Transactions'

EXCEPTIONS

lifetime_error = 1

cntl_system_error = 2

create_error = 3

failed = 4

illegal_node_selection_mode = 5

others = 6.

PERFORM f9800_error_handle USING text-e06.

ENDIF.

WHEN 'o_eventreceiver'.

IF o_eventreceiver IS INITIAL.

CREATE OBJECT o_eventreceiver.

PERFORM f9800_error_handle USING text-e08.

ENDIF.

WHEN OTHERS.

do nothing

ENDCASE.

ENDFORM. " f9000_objects_create

&----

*& Form f9100_create_tree

&----

Create the Tree

----

-->P_O_TREE tree data

----

FORM f9100_create_tree USING p_o_tree TYPE REF TO cl_gui_simple_tree.

REFRESH: i_nodes.

CLEAR: w_nodes.

Header Tree Folder

w_nodes-node_key = 'ROOT'.

w_nodes-isfolder = c_x.

w_nodes-expander = c_x.

w_nodes-text = 'Transactions'.

APPEND w_nodes TO i_nodes.

Adding Root Nodes for the tree.
Key:
NODE_KEY, RELATKEY, RELATSHIP, HIDDEN, DISABLED, ISFOLDER, N_IMAGE,
EXP_IMAGE, STYLE, LAST_HITEM, NO_BRANCH, EXPANDER, DRAGDROPID, TEXT

PERFORM f9101_node_list USING: '1' 'ROOT' '' '' '' c_x '' '' '' '' ''

c_x '' 'Sales Orders'.

Adding subitems for the root node.

PERFORM f9101_node_list USING:

Material Details

'VA01' '1' '' '' '' '' '@15@' '' '' '' '' ''

'' 'Create Sales Orders',

Document Details

'VA02' '1' '' '' '' '' '@15@' '' '' '' '' ''

'' 'Change Sales Orders'.

PERFORM f9101_node_list USING: '2' 'ROOT' '' '' '' c_x '' '' '' '' ''

c_x '' 'Deliveries'.

Adding subitems for the root node.

PERFORM f9101_node_list USING:

Material Details

'VL01' '2' '' '' '' '' '@15@' '' '' '' '' ''

'' 'Create Outbound Delivery',

Document Details

'VL02' '2' '' '' '' '' '@15@' '' '' '' '' ''

'' 'Change Outbound Delivery'.

add the nodes to the tree object,

PERFORM f9102_add_treenodes TABLES i_nodes

USING 'ABDEMONODE' "node definition

p_o_tree. "tree declaration

enabling event handlers for the tree

PERFORM f9103_tree_event_handle USING p_o_tree.

ENDFORM. " f9100_create_tree

&----

*& Form f9101_node_list

&----

Adding Nodes in a TREE

----

FORM f9101_node_list USING value(pnodekey)

value(prelatkey)

value(prelatship)

value(phidden)

value(pdisabled)

value(pisfolder)

value(pimage)

value(pexpimage)

value(pstyle)

value(plastitem)

value(pnobranch)

value(pexpander)

value(pdragdropid)

value(ptext).

w_nodes-node_key = pnodekey.

w_nodes-relatkey = prelatkey.

w_nodes-relatship = prelatship. "Natural number

w_nodes-hidden = phidden.

w_nodes-disabled = pdisabled.

w_nodes-isfolder = pisfolder.

w_nodes-n_image = pimage. "Icons / embedded bitmap

w_nodes-exp_image = pexpimage. "Icons / embedded bitmap

w_nodes-style = pstyle.

w_nodes-last_hitem = plastitem. "Tree Control: Column Name / Item

"Name

w_nodes-no_branch = pnobranch.

w_nodes-expander = pexpander.

w_nodes-dragdropid = pdragdropid.

w_nodes-text = ptext.

APPEND w_nodes TO i_nodes.

ENDFORM. " f9101_node_list

&----

*& Form f9102_add_treenodes

&----

Adding the Nodes to the Tree

----

-->PI_NODES Table containg the Nodes
-->PTABLE Name of the Table structure name
-->PO_TREE tree object

----

FORM f9102_add_treenodes TABLES pi_nodes TYPE STANDARD TABLE

USING value(ptable)

po_tree TYPE REF TO cl_gui_simple_tree.

CALL METHOD po_tree->add_nodes

EXPORTING

table_structure_name = ptable "may need to change

node_table = pi_nodes[]

EXCEPTIONS

error_in_node_table = 1

failed = 2

dp_error = 3

table_structure_name_not_found = 4

OTHERS = 5

PERFORM f9800_error_handle USING text-e10.

ENDFORM. " f9102_add_treenodes

&----

*& Form f9103_tree_event_handle

&----

Event Handling for Tree.

----

-->P_P_O_TREE text

----

FORM f9103_tree_event_handle USING

p_o_tree TYPE REF TO cl_gui_simple_tree.

w_tree_event-eventid = cl_gui_simple_tree=>eventid_node_double_click.

w_tree_event-appl_event = ' '. " process PAI if event occurs

APPEND w_tree_event TO i_tree_event.

CALL METHOD p_o_tree->set_registered_events

EXPORTING

events = i_tree_event

EXCEPTIONS

cntl_error = 1

cntl_system_error = 2

illegal_event_combination = 3.

IF sy-subrc <> 0.

MESSAGE A000.

ENDIF.

IF o_eventreceiver IS INITIAL.

CREATE OBJECT o_eventreceiver.

ENDIF.

SET HANDLER o_eventreceiver->handle_node_double_click FOR p_o_tree.

ENDFORM. " f9103_tree_event_handle

----

-->P_IEXCLUDE text
-->P_1150 text

----

FORM f9200_exclude_functions USING pexclude LIKE i_exclude1

value(pfunction).

DATA: l_exclude TYPE ui_func.

l_exclude = pfunction.

APPEND l_exclude TO pexclude.

ENDFORM. " f9200_exclude_functions

&----

*& Form f9903_handle_node_double_click

&----

This form is used to handle the double click event for the tree

----

-->P_NODE_KEY Node clicked.

----

FORM f9903_handle_node_double_click USING p_node_key.

CASE p_node_key.

WHEN 'VA01'.

SUBMIT ZZZ_TEST AND RETURN.

CALL TRANSACTION 'VA01'. " and skip first screen.

WHEN 'VA02'.

CALL TRANSACTION 'VA02'. " and skip first screen.

WHEN 'VL01'.

CALL TRANSACTION 'VL01'. " and skip first screen.

WHEN 'VL02'.

CALL TRANSACTION 'VL02'. " and skip first screen.

WHEN OTHERS.

do nothning.

ENDCASE.

ENDFORM. " f9903_handle_node_double_click

&----

*& Form f9700_free_objects

&----

This form handles the freeing of the following objects
ALV
Docking Container

----

-->P_O_ALVGRID text
-->P_0020 text
-->P_0021 text

----

FORM f9700_free_objects USING pobject

value(ptype)

value(ptext).

Need to type the field symbol or it does not work

CASE ptype.

WHEN 'DOCKING'.

DATA: l_odock TYPE REF TO cl_gui_docking_container.

l_odock = pobject.

IF NOT ( l_odock IS INITIAL ).

CALL METHOD l_odock->free

EXCEPTIONS

cntl_error = 1

cntl_system_error = 2

OTHERS = 3.

CLEAR: pobject, l_odock.

PERFORM f9800_error_handle USING ptext.

ENDIF.

WHEN 'TREE'.

DATA: l_otree TYPE REF TO cl_gui_simple_tree.

l_otree = pobject.

IF NOT ( l_otree IS INITIAL ).

CALL METHOD l_otree->free

EXCEPTIONS

cntl_error = 1

cntl_system_error = 2

OTHERS = 3.

CLEAR: pobject, l_otree.

PERFORM f9800_error_handle USING ptext.

ENDIF.

WHEN OTHERS.

do something.

ENDCASE.

ENDFORM. " f9700_free_objects

&----

*& Form f9800_error_handle

&----

Handles Errors

----

-->P_PTEXT text

----

FORM f9800_error_handle USING value(ptext).

IF sy-subrc NE 0.

add your handling, for example

CALL FUNCTION 'POPUP_TO_INFORM'

EXPORTING

titel = text-e01

txt2 = sy-subrc

txt1 = ptext.

ENDIF.

ENDFORM. " f9800_error_handle

*PBO & PAI Modules

&----

*& Module STATUS_9001 OUTPUT

&----

text

----

module status_9001 output.

Set the Status Bar

set pf-status 'Z_STATUS'.

Set the Title

set titlebar 'Z_TITLE'.

perform f9000_objects_create using:

create docking container

'o_dockingcontainer' '' v_ratio1 '' '',

create a tree

'o_tree' o_dockingcontainer '' '' '',

Create the event reciever

'o_eventreceiver' '' '' '' ''.

Create the Tree View.

perform f9100_create_tree using o_tree.

endmodule. " STATUS_9001 OUTPUT

&----

*& Module USER_COMMAND_9001 INPUT

&----

text

----

module user_command_9001 input.

case sy-ucomm.

when 'EXIT' or 'CANC'.

perform f9700_free_objects using:

o_tree 'TREE' text-E03,

o_dockingcontainer 'DOCKING' text-E05,

o_eventreceiver 'EVENT' text-e09.

leave program.

leave. " to SCREEN 0.

when 'BACK'.

perform f9700_free_objects using:

o_tree 'TREE' text-E03,

o_dockingcontainer 'DOCKING' text-e05,

o_eventreceiver 'EVENT' text-E09.

set screen '0'.

leave screen.

when others.

endcase.

endmodule. " USER_COMMAND_9001 INPUT

Get back to me if u have any queries. Give me ur mail id, i will send one more sample code for ALV tree. This sample program will display only Tree not grid u can add ALV grid too.

Thanks & Regards,

Judith.

Re: ALV tree using Objects

Former Member — Wed, 29 Jun 2005 20:08:35 GMT

Hi Gaurav,

Try BCALV_TREE_* and BCALVTREEGRID and you will get many examples.I am implementing the same which has got tree and grid combination.These examples will help you.

Regards,

Vijay

Re: ALV tree using Objects

Former Member — Wed, 29 Jun 2005 20:43:45 GMT

Hi Vijay,

Thanks for the examples.

Regards,

Gaurav

Re: ALV tree using Objects

Former Member — Thu, 30 Jun 2005 04:08:44 GMT

Hi,

If u have found solution please reward points and close the thread. Hope the documents that i sent through mail might be helpful.

Thanks & Regards,

Judith.

Re: ALV tree using Objects

Former Member — Thu, 11 Dec 2014 07:10:33 GMT

Hello.

Answering your question, that post you refer to, have two things missing:

1. Sentence "CALL METHOD obj_tree->frontend_update." of the ALV Tree class, after calling "CALL METHOD cl_gui_cfw=>flush." (please create proper module and forms to do this).

2. Structure name on the corresponding "set_table_for_first_display" method of tree object (thus, this is not mandatory).

I know its a very old post, but I guess people still read it, you did not share the answer, but just emailed it (not very nice of you guys).

I hope my late reply does help others with this same problem.

By the way, the post Im talking about, is this one (the one from the original post):

http://www.sapdevelopment.co.uk/reporting/alv/alvtree.htm

See you around.