Node_Double_Click wont Trigger ALV TREE

[Former Member]

Hi Sdn Community,

My class has a event that is triggered by (at least was supposed to be) Node_Double_Click. ( I even tried Item_Double_Click event, and mark 'X' in item_selection parameter when creating my instance of CL_GUI_ALV_TREE but that event wont trigger too.)

I already have set the handler (SET HANDLER me->event_name for r_alvtree) just right off the creating of the object (CL_GUI_ALV_TREE).

Then I Sot the Method to be Event Handler, giving the name of the class 'CL_GUI_ALV_TREE' and Node_Double_Click for the event (in detalied vision options).

Obs: As U can notice, I'm using Class Builder...

Still have I missed something?

When tring to use another method, like Header_Click, it work's fine...

[uwe_schieferstein]

Hello Jose

I assume you have not registered the event with the tree instance.

Have a look at the following sample report. The crucial parts are marked using $ADDED$:

<b>(1) Register event with tree instance:</b>

[code] "Register event for NODE_DOUBLE_CLICK

l_event-eventid = cl_gui_column_tree=>eventid_node_double_click.

APPEND l_event TO lt_events.[/code]

<b>(2) Set handler vor event:</b>

[code] SET HANDLER l_event_receiver->handle_node_double_click

FOR tree1.[/code]

(3) Define and implement event handler method:

[code] METHODS handle_node_double_click

FOR EVENT node_double_click OF cl_gui_alv_tree

IMPORTING node_key.

ENDCLASS. "lcl_tree_event_receiver DEFINITION

----

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• CLASS lcl_tree_event_receiver IMPLEMENTATION

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---

*

----

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CLASS lcl_tree_event_receiver IMPLEMENTATION.

METHOD handle_node_double_click.

MESSAGE node_key TYPE 'I'.

ENDMETHOD. "handle_node_double_click[/code]

The sample report is a modified version of BCALV_TREE_DEMO. For raising the event NODE_DOUBLE_CLICK you have to double-click on the folders in the hierarchy part of the ALV.

[code]&----

---

*& Report ZUS_SDN_BCALV_TREE_DEMO_4_ROOT *

*& *

&----

---

*& *

*& *

&----

---

REPORT bcalv_tree_demo.

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 zus_sdn_tb_event_receiver_4.

*include bcalv_toolbar_event_receiver.

INCLUDE zus_sdn_tree_event_receiver_4.

*include bcalv_tree_event_receiver.

DATA: toolbar_event_receiver TYPE REF TO lcl_toolbar_event_receiver.

DATA: gt_sflight TYPE sflight OCCURS 0, "Output-Table

gt_fieldcatalog TYPE lvc_t_fcat, "Fieldcatalog

ok_code LIKE sy-ucomm. "OK-Code

PARAMETERS:

p_root AS CHECKBOX. " $ADDED

START-OF-SELECTION.

END-OF-SELECTION.

CALL SCREEN 100.

&----

---

*& Module PBO OUTPUT

&----

---

• process before output

----

---

MODULE pbo OUTPUT.

SET PF-STATUS 'MAIN100'.

IF tree1 IS INITIAL.

PERFORM init_tree.

ENDIF.

CALL METHOD cl_gui_cfw=>flush.

ENDMODULE. " PBO OUTPUT

&----

---

*& Module PAI INPUT

&----

---

• process after input

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---

MODULE pai INPUT.

CASE ok_code.

WHEN 'EXIT' OR 'BACK' OR 'CANC'.

PERFORM exit_program.

WHEN OTHERS.

CALL METHOD cl_gui_cfw=>dispatch.

ENDCASE.

CLEAR ok_code.

CALL METHOD cl_gui_cfw=>flush.

ENDMODULE. " PAI INPUT

&----

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*& Form build_fieldcatalog

&----

---

• build fieldcatalog for structure sflight

----

---

FORM build_fieldcatalog.

• get fieldcatalog

CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'

EXPORTING

i_structure_name = 'SFLIGHT'

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 'CARRID' OR 'CONNID' OR 'FLDATE'.

ls_fieldcatalog-no_out = 'X'.

ls_fieldcatalog-key = ''.

WHEN 'PRICE' OR 'SEATSOCC' OR 'SEATSMAX' OR 'PAYMENTSUM'.

ls_fieldcatalog-do_sum = 'X'.

ENDCASE.

MODIFY gt_fieldcatalog FROM ls_fieldcatalog.

ENDLOOP.

ENDFORM. " build_fieldcatalog

&----

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*& Form build_hierarchy_header

&----

---

• build hierarchy-header-information

----

---

• -->P_L_HIERARCHY_HEADER strucxture for hierarchy-header

----

---

FORM build_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. " build_hierarchy_header

&----

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*& Form exit_program

&----

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• free object and leave program

----

---

FORM exit_program.

CALL METHOD tree1->free.

LEAVE PROGRAM.

ENDFORM. " exit_program

&----

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*& Form build_header

&----

---

• build table for html_header

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---

• --> p1 text

• <-- p2 text

----

---

FORM build_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. "build_comment

&----

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*& Form create_hierarchy

&----

---

• text

----

---

• --> p1 text

• <-- p2 text

----

---

FORM create_hierarchy.

DATA: ls_sflight TYPE sflight,

lt_sflight TYPE sflight OCCURS 0.

• get data

SELECT * FROM sflight INTO TABLE lt_sflight

UP TO 200 ROWS . "#EC CI_NOWHERE

SORT lt_sflight BY carrid connid fldate.

• add data to tree

DATA: l_carrid_key TYPE lvc_nkey,

l_connid_key TYPE lvc_nkey,

l_last_key TYPE lvc_nkey.

DATA: l_root_key TYPE lvc_nkey. " $ADDED

IF ( p_root = 'X' ).

CLEAR: ls_sflight.

PERFORM add_root_node USING ls_sflight

''

CHANGING l_root_key.

ELSE.

l_root_key = ''.

ENDIF. " $ADDED

LOOP AT lt_sflight INTO ls_sflight.

ON CHANGE OF ls_sflight-carrid.

PERFORM add_carrid_line USING ls_sflight

l_root_key " ''

CHANGING l_carrid_key.

ENDON.

ON CHANGE OF ls_sflight-connid.

PERFORM add_connid_line USING ls_sflight

l_carrid_key

CHANGING l_connid_key.

ENDON.

PERFORM add_complete_line USING ls_sflight

l_connid_key

CHANGING l_last_key.

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. " create_hierarchy

&----

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*& Form add_root_node

&----

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• add root node

----

---

• -->P_LS_SFLIGHT sflight

• -->P_RELEATKEY relatkey

• <-->p_node_key new node-key

----

---

FORM add_root_node USING ps_sflight TYPE sflight

p_relat_key TYPE lvc_nkey

CHANGING p_node_key TYPE lvc_nkey.

DATA: l_node_text TYPE lvc_value,

ls_sflight TYPE sflight.

• 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 = 'Root = All Airlines'.

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_sflight

is_node_layout = ls_node

it_item_layout = lt_item_layout

IMPORTING

e_new_node_key = p_node_key.

ENDFORM. " add_root_node

&----

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*& Form add_carrid_line

&----

---

• add hierarchy-level 1 to tree

----

---

• -->P_LS_SFLIGHT sflight

• -->P_RELEATKEY relatkey

• <-->p_node_key new node-key

----

---

FORM add_carrid_line USING ps_sflight TYPE sflight

p_relat_key TYPE lvc_nkey

CHANGING p_node_key TYPE lvc_nkey.

DATA: l_node_text TYPE lvc_value,

ls_sflight TYPE sflight.

• 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 = ps_sflight-carrid.

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_sflight

is_node_layout = ls_node

it_item_layout = lt_item_layout

IMPORTING

e_new_node_key = p_node_key.

ENDFORM. " add_carrid_line

&----

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*& Form add_connid_line

&----

---

• add hierarchy-level 2 to tree

----

---

• -->P_LS_SFLIGHT sflight

• -->P_RELEATKEY relatkey

• <-->p_node_key new node-key

----

---

FORM add_connid_line USING ps_sflight TYPE sflight

p_relat_key TYPE lvc_nkey

CHANGING p_node_key TYPE lvc_nkey.

DATA: l_node_text TYPE lvc_value,

ls_sflight TYPE sflight.

• set item-layout

DATA: lt_item_layout TYPE lvc_t_layi,

ls_item_layout TYPE lvc_s_layi.

ls_item_layout-t_image = '@3Y@'.

ls_item_layout-style =

cl_gui_column_tree=>style_intensified.

ls_item_layout-fieldname = tree1->c_hierarchy_column_name.

APPEND ls_item_layout TO lt_item_layout.

• add node

l_node_text = ps_sflight-connid.

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_sflight

it_item_layout = lt_item_layout

IMPORTING

e_new_node_key = p_node_key.

ENDFORM. " add_connid_line

&----

---

*& Form add_cmplete_line

&----

---

• add hierarchy-level 3 to tree

----

---

• -->P_LS_SFLIGHT sflight

• -->P_RELEATKEY relatkey

• <-->p_node_key new node-key

----

---

FORM add_complete_line USING ps_sflight TYPE sflight

p_relat_key TYPE lvc_nkey

CHANGING p_node_key TYPE lvc_nkey.

DATA: l_node_text TYPE lvc_value.

• set item-layout

DATA: lt_item_layout TYPE lvc_t_layi,

ls_item_layout TYPE lvc_s_layi.

ls_item_layout-fieldname = tree1->c_hierarchy_column_name.

ls_item_layout-class = cl_gui_column_tree=>item_class_checkbox.

ls_item_layout-editable = 'X'.

APPEND ls_item_layout TO lt_item_layout.

CLEAR ls_item_layout.

ls_item_layout-fieldname = 'PLANETYPE'.

ls_item_layout-alignment = cl_gui_column_tree=>align_right.

APPEND ls_item_layout TO lt_item_layout.

l_node_text = ps_sflight-fldate.

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

is_outtab_line = ps_sflight

i_node_text = l_node_text

is_node_layout = ls_node

it_item_layout = lt_item_layout

IMPORTING

e_new_node_key = p_node_key.

ENDFORM. " add_complete_line

&----

---

*& Form register_events

&----

---

• text

----

---

• --> p1 text

• <-- p2 text

----

---

FORM register_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.

"$ADDED$ Register event for NODE_DOUBLE_CLICK

l_event-eventid = cl_gui_column_tree=>eventid_node_double_click.

APPEND l_event TO lt_events.

"$ADDED$

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.

"$ADDED$

SET HANDLER l_event_receiver->handle_node_double_click

FOR tree1.

"$ADDED$

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. " register_events

&----

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*& Form change_toolbar

&----

---

• text

----

---

• --> p1 text

• <-- p2 text

----

---

FORM change_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. " change_toolbar

&----

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*& Form init_tree

&----

---

• text

----

---

• --> p1 text

• <-- p2 text

----

---

FORM init_tree.

• create fieldcatalog for structure sflight

PERFORM build_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 build_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 build_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_sflight "table must be emty !!

it_fieldcatalog = gt_fieldcatalog.

• create hierarchy

PERFORM create_hierarchy.

• add own functioncodes to the toolbar

PERFORM change_toolbar.

• register events

PERFORM register_events.

• adjust column_width

• call method tree1->COLUMN_OPTIMIZE.

ENDFORM. " init_tree[/code]

Regards

Uwe

[Former Member]

> Hello Jose

>

> I assume you have not registered the event with the

> tree instance.

> Have a look at the following sample report. The

> crucial parts are marked using $ADDED$:

>

> <b>(1) Register event with tree instance:</b>

>

>

 "Register event for NODE_DOUBLE_CLICK
> l_event-eventid =
> cl_gui_column_tree=>eventid_node_double_click.
>   APPEND l_event TO lt_events.

Exactly, Uwe.

I Missed the METHOD SET_REGISTERED_EVENT. Inserting those lines up-ahead and this method just befero setting my handler corrects my Abap coding.

Still, strange to Header_Click event works without those thnigs.

But now, Node_Double_Click is working properly.

Thanx, Uwe.