Sample for F4-Help

src/z2ui5_cl_demo_app_204.clas.abap

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+CLASS z2ui5_cl_demo_app_204 DEFINITION
+  PUBLIC
+  CREATE PUBLIC.
+
+  PUBLIC SECTION.
+    INTERFACES z2ui5_if_app.
+
+    DATA ms_t004 TYPE z2ui5_t004.
+
+  PROTECTED SECTION.
+    DATA client            TYPE REF TO z2ui5_if_client.
+    DATA check_initialized TYPE abap_bool.
+
+    DATA mv_active_f4      TYPE string.
+
+    METHODS on_init.
+    METHODS on_event.
+    METHODS render_main.
+    METHODS call_f4.
+
+  PRIVATE SECTION.
+    METHODS on_after_f4.
+
+ENDCLASS.
+
+
+CLASS z2ui5_cl_demo_app_204 IMPLEMENTATION.
+
+  METHOD on_event.
+
+    CASE client->get( )-event.
+
+      WHEN 'BACK'.
+        client->nav_app_leave( client->get_app( client->get( )-s_draft-id_prev_app_stack ) ).
+
+      WHEN `CALL_POPUP_F4`.
+
+        call_f4( ).
+
+      WHEN OTHERS.
+
+    ENDCASE.
+
+  ENDMETHOD.
+
+  METHOD on_init.
+
+    render_main( ).
+
+  ENDMETHOD.
+
+  METHOD render_main.
+
+    DATA(view) = z2ui5_cl_xml_view=>factory( ). "->shell( ).
+
+    DATA(page) = view->page( title          = 'Layout'
+                             navbuttonpress = client->_event( 'BACK' )
+                             shownavbutton  = xsdbool( client->get( )-s_draft-id_prev_app_stack IS NOT INITIAL )
+                             class          = 'sapUiContentPadding' ).
+
+    page->simple_form( title    = 'F4-Help'
+                       editable = abap_true
+                    )->content( 'form'
+                        )->text(
+                            `Table Z2UI5_T004 field GUID is linked to table Z2UI5 field GUID via a foreign key link.`
+                        )->label( `GUID`
+                        )->input( value            = client->_bind_edit( ms_t004-guid )
+                                  showvaluehelp    = abap_true
+                                  valuehelprequest = client->_event( val   = 'CALL_POPUP_F4'
+                                                                     t_arg = VALUE #( ( `GUID` ) ) ) ).
+
+    client->view_display( view->stringify( ) ).
+
+  ENDMETHOD.
+
+  METHOD z2ui5_if_app~main.
+    me->client = client.
+
+    IF check_initialized = abap_false.
+      check_initialized = abap_true.
+      on_init( ).
+    ENDIF.
+
+    on_event( ).
+
+    on_after_f4( ).
+
+  ENDMETHOD.
+
+  METHOD call_f4.
+
+    DATA(lt_arg) = client->get( )-t_event_arg.
+
+    mv_active_f4 = VALUE string( lt_arg[ 1 ] ).
+
+    CASE mv_active_f4.
+      WHEN `GUID`.
+
+        client->nav_app_call( z2ui5_cl_pop_f4_help=>factory( i_table = 'Z2UI5_T004'
+                                                             i_fname = 'GUID'
+                                                             i_value = CONV #( ms_t004-guid ) ) ).
+      WHEN OTHERS.
+
+    ENDCASE.
+
+  ENDMETHOD.
+
+  METHOD on_after_f4.
+
+    IF client->get( )-check_on_navigated = abap_false.
+      RETURN.
+    ENDIF.
+
+    TRY.
+        DATA(app) = CAST z2ui5_cl_pop_f4_help( client->get_app( client->get( )-s_draft-id_prev_app ) ).
+
+        IF app->mv_return_value IS NOT INITIAL.
+
+          CASE mv_active_f4.
+            WHEN `GUID`.
+
+              ms_t004-guid = CONV #( app->mv_return_value ).
+
+            WHEN OTHERS.
+
+          ENDCASE.
+
+          client->view_model_update( ).
+
+        ENDIF.
+
+      CATCH cx_root.
+    ENDTRY.
+
+  ENDMETHOD.
+
+ENDCLASS.

src/z2ui5_cl_demo_app_204.clas.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<abapGit version="v1.0.0" serializer="LCL_OBJECT_CLAS" serializer_version="v1.0.0">
+ <asx:abap xmlns:asx="http://www.sap.com/abapxml" version="1.0">
+  <asx:values>
+   <VSEOCLASS>
+    <CLSNAME>Z2UI5_CL_DEMO_APP_204</CLSNAME>
+    <LANGU>E</LANGU>
+    <DESCRIPT>Table Layout</DESCRIPT>
+    <STATE>1</STATE>
+    <CLSCCINCL>X</CLSCCINCL>
+    <FIXPT>X</FIXPT>
+    <UNICODE>X</UNICODE>
+   </VSEOCLASS>
+  </asx:values>
+ </asx:abap>
+</abapGit>