Step 7: Popups

Clicking a row now opens a dialog to edit the invoice's quantity. A popup is built with the same builder and the same verbs as the view — only the root element changes (core:FragmentDefinition instead of mvc:View), and it is handed to popup_display( ) while the main view stays untouched behind it:

CLASS zcl_app_walkthrough DEFINITION PUBLIC.
  PUBLIC SECTION.
    INTERFACES z2ui5_if_app.

    TYPES:
      BEGIN OF ty_s_invoice,
        product  TYPE string,
        supplier TYPE string,
        quantity TYPE string,
      END OF ty_s_invoice.

    DATA t_invoices TYPE STANDARD TABLE OF ty_s_invoice WITH EMPTY KEY.
    DATA s_edit     TYPE ty_s_invoice.
ENDCLASS.

CLASS zcl_app_walkthrough IMPLEMENTATION.
  METHOD z2ui5_if_app~main.

    IF client->check_on_navigated( ).

      t_invoices = VALUE #(
          ( product = `Pineapple`    supplier = `ACME`          quantity = `21` )
          ( product = `Milk`         supplier = `Green Growers` quantity = `4`  )
          ( product = `Canned Beans` supplier = `Corner Deli`   quantity = `3`  )
          ( product = `Salad`        supplier = `Green Growers` quantity = `2`  )
          ( product = `Bread`        supplier = `Corner Deli`   quantity = `1`  ) ).

      DATA(view) = z2ui5_cl_ui5_view_builder=>factory(
          )->ele( n = `View` ns = `mvc`
              )->a( n = `xmlns`     v = `sap.m`
              )->a( n = `xmlns:mvc` v = `sap.ui.core.mvc`

              )->ele( `Shell`
                  )->ele( `Page`
                      )->a( n = `title` v = `Walkthrough - Step 7`

                      )->ele( `List`
                          )->a( n = `headerText` v = `Invoices`
                          )->a( n = `items`      v = client->_bind( t_invoices )

                          )->ele( `items`
                              )->tag( `StandardListItem`
                                  )->a( n = `title`       v = `{PRODUCT}`
                                  )->a( n = `description` v = `{SUPPLIER}`
                                  )->a( n = `info`        v = `{QUANTITY}`
                                  )->a( n = `type`        v = `Active`
                                  )->a( n = `press`       v = client->_event( val   = `EDIT`
                                                                              t_arg = VALUE #( ( `${PRODUCT}` ) ) ) ).

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

    ELSEIF client->check_on_event( `EDIT` ).

      s_edit = VALUE #( t_invoices[ product = client->get_event_arg( ) ] OPTIONAL ).

      DATA(popup) = z2ui5_cl_ui5_view_builder=>factory(
          )->ele( n = `FragmentDefinition` ns = `core`
              )->a( n = `xmlns`      v = `sap.m`
              )->a( n = `xmlns:core` v = `sap.ui.core`

              )->ele( `Dialog`
                  )->a( n = `title` v = |Edit { s_edit-product }|

                  )->ele( `content`

                      )->tag( `Label`
                          )->a( n = `text` v = `Quantity`
                      )->tag( `Input`
                          )->a( n = `value` v = client->_bind( s_edit-quantity )

                  )->end(

                  )->ele( `buttons`

                      )->tag( `Button`
                          )->a( n = `text`  v = `Cancel`
                          )->a( n = `press` v = client->_event( `CANCEL` )
                      )->tag( `Button`
                          )->a( n = `text`  v = `Save`
                          )->a( n = `press` v = client->_event( `SAVE` )
                          )->a( n = `type`  v = `Emphasized` ).

      client->popup_display( popup->stringify( ) ).

    ELSEIF client->check_on_event( `SAVE` ).

      t_invoices[ product = s_edit-product ]-quantity = s_edit-quantity.
      client->popup_destroy( ).
      client->message_toast_display( |{ s_edit-product } updated.| ).

    ELSEIF client->check_on_event( `CANCEL` ).

      client->popup_destroy( ).

    ENDIF.

  ENDMETHOD.
ENDCLASS.

What Is New

• s_edit is the popup's model. The EDIT handler copies the clicked row into it, and the dialog's input binds to s_edit-quantity — by the time SAVE arrives, the attribute already holds the new value.
• popup_display( ) / popup_destroy( ) show and close the dialog. The main view is never rebuilt — it waits behind the popup.
• No refresh call after SAVE. The handler changes t_invoices and does nothing else: every roundtrip that changed bound data pushes the new model to the browser by itself, and the list updates. (You may see view_model_update( ) in older code — it is deliberately empty and does nothing.)

Popovers, message boxes and the built-in popup classes are covered under Popup, Popover.

The app is complete — one last step separates it into the structure real apps use.

Working Samples

Complete apps from the sample catalogue that use what this page describes. Each is a single class — pull the repository with abapGit and start it with ?app_start=<class>.

Sample	Class
Ways to Open a Dialog (A)	Z2UI5_CL_SMP_APP_012