动态地将视图的实例添加到一个透明容器中



我有一个场景,我想在一个视图的TransparentContainer上有N个视图实例,每个实例接收不同的参数。为了实现这一点,我编写了一些逻辑来动态创建cl_wd_view_container_uielement,将其添加到cl_wd_uielement_container(主视图上的TransparentContainer),然后使用动态导航发射插头来发送我的参数。代码如下:

这都有一个问题:创建的实例不是唯一的,所以我基本上添加了N个相同视图的副本。N个插头被触发和处理,但最后一个为所有视图设置参数,因为只有一个实例。视图的WDDOMODIFYVIEW也只触发一次。

下面的代码是从一个工作版本中重新定位和清理的,所以我知道这是可能的。最大的区别在于,我在我的场景中添加了来自同一个WDC的视图。在原始应用程序中,动态添加的视图有自己的Web Dynpro组件,调用者也提供了动态创建的组件用法。

是否有一些方法创建多个实例,我错过了?在这种情况下,我是否应该提供一个组件的用法?我已经修修补补了几个小时了,但没有取得任何进展,所以我欢迎任何建议,让我走上正确的轨道。

主视图代码:

DATA:
    lo_container          TYPE REF TO cl_wd_uielement_container,
    lo_subview            TYPE REF TO cl_wd_view_container_uielement,
    lo_flow_data          TYPE REF TO cl_wd_flow_data,
    lo_view_controller    TYPE REF TO if_wd_view_controller,
    lo_component_usage    TYPE REF TO if_wd_component_usage,
    lo_wdr_view           TYPE REF TO cl_wdr_view,
    lo_component_api      TYPE REF TO if_wd_component,
    lt_posts              TYPE ztt_fi_vernot_posts,
    ls_post               LIKE LINE OF lt_posts,
    lt_parameters         TYPE wdr_event_parameter_list,
    ls_parameter          TYPE wdr_event_parameter,
    lv_view_id            TYPE string,
    lv_source_plug_name   TYPE string,
    lv_target_embed_pos   TYPE string,
    lv_param_value        TYPE REF TO DATA.
FIELD-SYMBOLS:
    <lv_param_value>      TYPE bu_partner
.
lt_posts = wd_this->mo_model->get_posts( iv_open = abap_true ).
" Retrieve and refresh the view container.
lo_wdr_view  ?= wd_this->wd_get_api( ).
lo_container ?= lo_wdr_view->root_element.
lo_container ?= lo_wdr_view->get_element( 'TC_POSTS' ).
lo_container->remove_all_children( ).
LOOP AT lt_posts INTO ls_post.
" View and plug IDs should be unique.
CONCATENATE 'POSTS_' ls_post-index  INTO lv_view_id.
CONCATENATE 'OUTPLUG_' ls_post-index INTO lv_source_plug_name.
" Create a new view.
lo_subview  = cl_wd_view_container_uielement=>new_view_container_uielement( id = lv_view_id ).
lo_flow_data = cl_wd_flow_data=>new_flow_data( element = lo_subview ).
lo_subview->set_layout_data( lo_flow_data ).
lo_subview->set_layout_data( cl_wd_flow_data=>new_flow_data( element = lo_subview ) ).
lo_container->add_child( lo_subview ).
lo_view_controller = wd_this->wd_get_api( ).
CONCATENATE 'V_MAIN/' lv_view_id INTO lv_target_embed_pos.
*   This was present in the source, returning a component usage via create_comp_usage_of_same_type()
*   lo_component_usage = wd_comp_controller->get_component( iv_compcnt = ls_post-index  ).
lo_view_controller->prepare_dynamic_navigation(
  source_window_name          = 'W_MAIN'
  " Found in the window structure for this View
  source_vusage_name          = 'V_MAIN_USAGE_0'
  source_plug_name            = lv_source_plug_name
" target_component_name       = '[WDC name]'   " Optional?
" target_component_usage      = lo_component_usage->name " Optional?
  target_view_name            = 'V_POSTS'
  target_plug_name            = 'SET_PARAMS'
  target_embedding_position   = lv_target_embed_pos ).
" Fill the paramaters. Note that the values should be passed as pointers.
REFRESH lt_parameters.
CLEAR ls_parameter.
ls_parameter-name = zcl_fi_vernot=>gcs_plugs-params-bp.
CREATE DATA lv_param_value LIKE ls_post-bp.
ASSIGN lv_param_value->* TO <lv_param_value>.
<lv_param_value> = ls_post-bp.
ls_parameter-value = lv_param_value.
INSERT ls_parameter INTO TABLE lt_parameters.
" Do the same for the contract.
CLEAR ls_parameter.
ls_parameter-name = zcl_fi_vernot=>gcs_plugs-params-contract.
CREATE DATA lv_param_value LIKE ls_post-contract.
ASSIGN lv_param_value->* TO <lv_param_value>.
<lv_param_value> = ls_post-contract.
ls_parameter-value = lv_param_value.
INSERT ls_parameter INTO TABLE lt_parameters.
" Finally, fire the plug.
wd_this->wd_get_api( )->fire_plug( plug_name = lv_source_plug_name parameters = lt_parameters ).
ENDLOOP.

这个问题不仅限于视图的动态生成,而且当您想在同一组件的窗口中多次使用特定视图时也会发生。只有一个实例被创建,所以重用是非常有限的。

唯一的解决方案是将View分离到它自己的Web Dynpro组件中,或者创建活动WDC的多个组件用法,并在动态导航中使用它们。

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