Solved: cl_gui_alv_tree no child nodes after registering e...

sven_schuberth2 · ‎05-13-2014

Hey guys,

I have an uncommon problem with cl_gui_alv_tree.

My tree has 2 layers, Root and child. Both of them have layout-class cl_gui_column_tree=>item_class_checkbox.

Everithing works fine! (without_events.jpg)

But if I register event "checkbox_change" with method SET_REGISTERED_EVENTS the childnodes disapear! (with_events.jpg)

Does anyone know a solution?

here's some code:

data; gr_alv_0200 type ref to cl_gui_alv_tree.

METHOD init_dynpro_0200.

DATA: ls_hierarchy_header TYPE treev_hhdr.

IF gr_cont_0200 IS INITIAL.

CREATE OBJECT gr_cont_0200

EXPORTING

container_name = 'CC200'

EXCEPTIONS

cntl_error = 1

cntl_system_error = 2

create_error = 3

lifetime_error = 4

lifetime_dynpro_dynpro_link = 5

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.

IF gr_alv_0200 IS INITIAL.

CREATE OBJECT gr_alv_0200

EXPORTING

* lifetime =

parent = gr_cont_0200

node_selection_mode = cl_gui_column_tree=>node_sel_mode_single

item_selection = 'X'

no_toolbar = 'X'

no_html_header = 'X'

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

OTHERS = 8.

CHECK sy-subrc EQ 0.

ls_hierarchy_header-heading = 'Hierarchy Header'. "#EC NOTEXT

ls_hierarchy_header-tooltip =

'This is the Hierarchy Header !'. "#EC NOTEXT

ls_hierarchy_header-width = 100.

ls_hierarchy_header-width_pix = ''.

tree_create_fcat( ).

CALL METHOD gr_alv_0200->set_table_for_first_display

EXPORTING

is_hierarchy_header = ls_hierarchy_header

i_background_id = 'ALV_BACKGROUND'

CHANGING

it_outtab = gt_treenodes

it_fieldcatalog = gt_fcat_0200.

DATA: lt_events TYPE cntl_simple_events,

ls_event LIKE LINE OF lt_events.

ls_event-eventid = cl_gui_column_tree=>eventid_checkbox_change.

APPEND ls_event TO lt_events.

CALL METHOD gr_alv_0200->set_registered_events

EXPORTING

events = lt_events

EXCEPTIONS

cntl_error = 1

cntl_system_error = 2

illegal_event_combination = 3.

SET HANDLER me->on_tree_checkbox_change FOR gr_alv_0200.

ENDIF.

ENDMETHOD.

METHOD tree_add_node.

DATA: ls_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 = gr_alv_0200->c_hierarchy_column_name.

ls_item_layout-style = cl_gui_column_tree=>style_intensifd_critical.

ls_item_layout-class = cl_gui_column_tree=>item_class_checkbox.

ls_item_layout-editable = 'X'.

APPEND ls_item_layout TO lt_item_layout.

* add node

ls_node_text = is_data-name.

DATA: ls_node TYPE lvc_s_layn.

ls_node-n_image = space.

ls_node-exp_image = space.

CALL METHOD gr_alv_0200->add_node

EXPORTING

i_relat_node_key = iv_parent

i_relationship = cl_gui_column_tree=>relat_last_child

i_node_text = ls_node_text

is_outtab_line = is_data

is_node_layout = ls_node

it_item_layout = lt_item_layout

IMPORTING

e_new_node_key = ev_node_id.

ENDMETHOD.

in my current class I've method on_tree_checkbox_change to handle the event. If the event is registered, the method gets called.

sven_schuberth2 · ‎05-22-2014

Solved by my own:

I had to implement method get_registered_events( ), append the new event to the table and call set_registered_events( ).

The table from get_registered_events( ) is already filled with events.

sven_schuberth2 · ‎05-22-2014

Solved by my own:

I had to implement method get_registered_events( ), append the new event to the table and call set_registered_events( ).

The table from get_registered_events( ) is already filled with events.

cl_gui_alv_tree no child nodes after registering event