Control Behaviour

" @keywords multiinput token tokens suggestion custom control
" @summary A MultiInput with tokens and suggestions bound to an internal table - the value help for a field that holds many values at once.
" @docs https://abap2ui5.github.io/docs/cookbook/expert_more/value_help
CLASS z2ui5_cl_smp_app_078 DEFINITION PUBLIC.

  PUBLIC SECTION.
    INTERFACES z2ui5_if_app.

    TYPES:
      BEGIN OF ty_s_token,
        key      TYPE string,
        text     TYPE string,
        visible  TYPE abap_bool,
        selkz    TYPE abap_bool,
        editable TYPE abap_bool,
      END OF ty_s_token.

    DATA mt_token          TYPE STANDARD TABLE OF ty_s_token WITH EMPTY KEY.
    DATA mt_tokens_added TYPE STANDARD TABLE OF ty_s_token WITH EMPTY KEY.
    DATA mt_tokens_removed TYPE STANDARD TABLE OF ty_s_token WITH EMPTY KEY.

  PROTECTED SECTION.
    DATA client TYPE REF TO z2ui5_if_client.

    METHODS view_display.

  PRIVATE SECTION.
ENDCLASS.


CLASS z2ui5_cl_smp_app_078 IMPLEMENTATION.

  METHOD z2ui5_if_app~main.

    me->client = client.
    IF client->check_on_navigated( ).
      view_display( ).
    ELSEIF client->check_on_event( `UPDATE_BACKEND` ).

      LOOP AT mt_tokens_removed INTO DATA(ls_token).
        DELETE mt_token WHERE key = ls_token-key.
      ENDLOOP.

      LOOP AT mt_tokens_added INTO ls_token.
        INSERT VALUE #( key = ls_token-key text = ls_token-text visible = abap_true editable = abap_true ) INTO TABLE mt_token.
      ENDLOOP.

      mt_tokens_removed = VALUE #( ).
      mt_tokens_added   = VALUE #( ).
    ENDIF.

  ENDMETHOD.


  METHOD view_display.

    DATA(view) = z2ui5_cl_ui5_view_builder=>factory(
        )->ele( n = `View` ns = `mvc`
            )->a( n = `displayBlock` v = `true`
            )->a( n = `height`       v = `100%`
            )->a( n = `xmlns`        v = `sap.m`
            )->a( n = `xmlns:mvc`    v = `sap.ui.core.mvc`
            )->a( n = `xmlns:z2ui5`  v = `z2ui5.cc` ).

    view           = view->ele( `Shell`
        )->ele( `Page`
            )->a( n = `title`          v = `abap2UI5 - Control Behaviour - MultiInput with Tokens`
            )->a( n = `showNavButton`  b = client->check_app_prev_stack( )
            )->a( n = `navButtonPress` v = client->_event_nav_app_leave( )
            )->a( n = `id`             v = `page_main` ).

    view->tag( `MessageStrip`
        )->a( n = `text` v = `The multiinput_ext custom control extends a sap.m.MultiInput so that added and removed ` &&
                   `tokens are reported back to ABAP, where the token table and the linked list are updated.`
        )->a( n = `type`     v = `Information`
        )->a( n = `showIcon` b = abap_true
        )->a( n = `class`    v = `sapUiSmallMargin` ).

    view->tag( n = `MultiInputExt` ns = `z2ui5`
        )->a( n = `MultiInputId`  v = `test`
        )->a( n = `change`        v = client->_event( `UPDATE_BACKEND` )
        )->a( n = `addedTokens`   v = client->_bind( mt_tokens_added )
        )->a( n = `removedTokens` v = client->_bind( mt_tokens_removed ) ).

    " abap2ui5lint-disable-next-line editable-control-without-binding -- MultiInputExt above turns what is typed into tokens and sends them
    view->ele( `MultiInput`
        )->a( n = `tokens` v = client->_bind( mt_token )
        )->a( n = `id`     v = `test`
        )->ele( `tokens`
            )->tag( `Token`
                )->a( n = `key`      v = `{KEY}`
                )->a( n = `text`     v = `{TEXT}`
                )->a( n = `selected` v = `{SELKZ}`
                )->a( n = `visible`  v = `{VISIBLE}`
                )->a( n = `editable` v = `{EDITABLE}` ).

    DATA(tab) = view->ele( `Table`
        )->a( n = `items` v = client->_bind( mt_token )
        )->a( n = `mode`  v = `MultiSelect` ).

    tab->ele( `columns`
        )->ele( `Column`
            )->tag( `Text`
                )->a( n = `text` v = `KEY`
        )->end(
        )->ele( `Column`
            )->tag( `Text`
                )->a( n = `text` v = `TEXT` ).

    tab->ele( `items`
        )->ele( `ColumnListItem`
            )->a( n = `selected` v = `{SELKZ}`
            )->ele( `cells`
                )->tag( `Input`
                    )->a( n = `enabled` v = `{EDITABLE}`
                    )->a( n = `value`   v = `{KEY}`
                )->tag( `Input`
                    )->a( n = `enabled` v = `{EDITABLE}`
                    )->a( n = `value`   v = `{TEXT}` ).

    client->view_display( view->stringify( ) ).

  ENDMETHOD.

ENDCLASS.