Combo box - Custom filtering "Starts with"

" @keywords combobox combo box sap.m comboboxfilteringstartswith vbox label listitem
" @summary You can override the default filtering "Starts with per term" with your own filter function using the setFilterFunction method. The "Starts with" approach searches only in the beginning of the entries in both columns.
CLASS z2ui5_cl_smpc_app_471 DEFINITION PUBLIC.

  PUBLIC SECTION.
    INTERFACES z2ui5_if_app.

    TYPES: BEGIN OF ty_s_country,
             key  TYPE string,
             text TYPE string,
           END OF ty_s_country.
    TYPES ty_t_country TYPE STANDARD TABLE OF ty_s_country WITH EMPTY KEY.

    DATA t_countries TYPE ty_t_country.

  PROTECTED SECTION.
    DATA client TYPE REF TO z2ui5_if_client.

    METHODS view_display.
    METHODS model_init.

  PRIVATE SECTION.
ENDCLASS.


CLASS z2ui5_cl_smpc_app_471 IMPLEMENTATION.

  METHOD z2ui5_if_app~main.

    me->client = client.
    IF client->check_on_init( ).
      model_init( ).
      view_display( ).
    ELSEIF client->check_on_navigated( ).
      view_display( ).
    ENDIF.

  ENDMETHOD.


  METHOD view_display.

    DATA(view) = z2ui5_cl_ui5_view_builder=>factory( ).

    view->ele( n = `View` ns = `mvc`
        )->a( n = `height`     v = `100%`
        )->a( n = `xmlns:core` v = `sap.ui.core`
        )->a( n = `xmlns:mvc`  v = `sap.ui.core.mvc`
        )->a( n = `xmlns`      v = `sap.m`

        )->ele( `Page`
            )->a( n = `showHeader` v = `false`
            )->a( n = `class`      v = `sapUiContentPadding`

            )->ele( `content`
                )->ele( `VBox`

                    )->ele( `items`
                        )->tag( `Label`
                            )->a( n = `text`     v = `Enter a search term, e.g. "A", and see filtered list.`
                            )->a( n = `labelFor` v = `combobox1`
                        )->ele( `ComboBox`
                            )->a( n = `id`                  v = `combobox1`
                            )->a( n = `showSecondaryValues` v = `true`
                            )->a( n = `filterSecondaryValues` v = `true`
                            )->a( n = `items`               v = |\{ path: '{ client->_bind_path( t_countries ) }', sorter: \{ path: 'TEXT' \} \}|

                            )->tag( n = `ListItem` ns = `core`
                                )->a( n = `key`            v = `{KEY}`
                                )->a( n = `text`           v = `{TEXT}`
                                )->a( n = `additionalText` v = `{KEY}` ).

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

  ENDMETHOD.


  METHOD model_init.

    " full mock /CountriesCollection of ui5/mock/countriesExtendedCollection.json
    t_countries = VALUE #(
        ( key = `DZ`  text = `Algeria` )
        ( key = `AR`  text = `Argentina` )
        ( key = `AU`  text = `Australia` )
        ( key = `AT`  text = `Austria` )
        ( key = `BH`  text = `Bahrain` )
        ( key = `BE`  text = `Belgium` )
        ( key = `BA`  text = `Bosnia and Herzegovina` )
        ( key = `BR`  text = `Brazil` )
        ( key = `BG`  text = `Bulgaria` )
        ( key = `CA`  text = `Canada` )
        ( key = `CL`  text = `Chile` )
        ( key = `CO`  text = `Colombia` )
        ( key = `HR`  text = `Croatia` )
        ( key = `CU`  text = `Cuba` )
        ( key = `CZ`  text = `Czech Republic` )
        ( key = `DK`  text = `Denmark` )
        ( key = `EG`  text = `Egypt` )
        ( key = `EE`  text = `Estonia` )
        ( key = `FI`  text = `Finland` )
        ( key = `FR`  text = `France` )
        ( key = `GER` text = `Germany` )
        ( key = `GH`  text = `Ghana` )
        ( key = `GR`  text = `Greece` )
        ( key = `HU`  text = `Hungary` )
        ( key = `IN`  text = `India` )
        ( key = `ID`  text = `Indonesia` )
        ( key = `IE`  text = `Ireland` )
        ( key = `IL`  text = `Israel` )
        ( key = `IT`  text = `Italy` )
        ( key = `JP`  text = `Japan` )
        ( key = `JO`  text = `Jordan` )
        ( key = `KE`  text = `Kenya` )
        ( key = `KW`  text = `Kuwait` )
        ( key = `LV`  text = `Latvia` )
        ( key = `LT`  text = `Lithuania` )
        ( key = `MK`  text = `Macedonia` )
        ( key = `MY`  text = `Malaysia` )
        ( key = `MX`  text = `Mexico` )
        ( key = `ME`  text = `Montenegro` )
        ( key = `MA`  text = `Morocco` )
        ( key = `NL`  text = `Netherlands` )
        ( key = `NZ`  text = `New Zealand` )
        ( key = `NG`  text = `Nigeria` )
        ( key = `NO`  text = `Norway` )
        ( key = `OM`  text = `Oman` )
        ( key = `PE`  text = `Peru` )
        ( key = `PH`  text = `Philippines` )
        ( key = `PL`  text = `Poland` )
        ( key = `PT`  text = `Portugal` )
        ( key = `QA`  text = `Qatar` )
        ( key = `RO`  text = `Romania` )
        ( key = `RU`  text = `Russia` )
        ( key = `SA`  text = `Saudi Arabia` )
        ( key = `SN`  text = `Senegal` )
        ( key = `RS`  text = `Serbia` )
        ( key = `SG`  text = `Singapore` )
        ( key = `SK`  text = `Slovakia` )
        ( key = `SI`  text = `Slovenia` )
        ( key = `ZA`  text = `South Africa` )
        ( key = `KR`  text = `South Korea` )
        ( key = `ES`  text = `Spain` )
        ( key = `SE`  text = `Sweden` )
        ( key = `CH`  text = `Switzerland` )
        ( key = `TN`  text = `Tunisia` )
        ( key = `TR`  text = `Turkey` )
        ( key = `UG`  text = `Uganda` )
        ( key = `UA`  text = `Ukraine` )
        ( key = `AE`  text = `United Arab Emirates` )
        ( key = `GB`  text = `United Kingdom` )
        ( key = `YE`  text = `Yemen` ) ).

  ENDMETHOD.

ENDCLASS.