How to switch between different instances of component usage?

Question

Hi All,
Need your help.
My application is about "Program Management", there is a table on the upper level which displays several program header data. in the lower level of the screen, I have a view container in which I embed another component to display program details.For instance,if you make a lead selection on one row of the table above, then the lower part will display the program detail.
Here is the problem: e.g. first, I make a selection on program '001', then I'll create a component usage of the program detail and I put it into a component uage group, second, I make a selection on program '002', then the same like above, I create another component usage and put it into a component usage group. Now I have two instances of program detail component usage, when I select program '001' again, how can I switch back to program '001' detail.
So, I'm trying to achieve multiple instances of program detail so that user don't need to wait for loading program details everytime.
Thanks in advance.
Regards,
Aaron
Edited by: Aaron Shen No.2 on Sep 22, 2009 3:44 AM

Answer 1

Hi Aaron,
As you are using two separate components, they would be having two separate views to display the required information.
In the onleadselect of your main view ( where you are using the individual views of the other components via the viewcontainerUI ), you have to embed the following code:
  DATA lo_api_main TYPE REF TO if_wd_view_controller.
  lo_api_main = wd_this->wd_get_api( ).
  CALL METHOD LO_API_MAIN->FIRE_PLUG
    EXPORTING
     PARAMETERS =
      PLUG_NAME  = 'OP_TO_TWO'
Create two outbound plugs in your window, and link them to the inbound plugs of the individual views of used components.
I am embedding the code of my onleadselection:
method ONACTIONSELECTED .
    DATA lo_nd_table_data TYPE REF TO if_wd_context_node.
    DATA lo_el_table_data TYPE REF TO if_wd_context_element.
    DATA ls_table_data TYPE wd_this->element_table_data.
    DATA lt_table_data TYPE wd_this->elements_table_data.
    data lv_selected_index type i.
  navigate from <CONTEXT> to <TABLE_DATA> via lead selection
    lo_nd_table_data = wd_context->get_child_node( name = wd_this->wdctx_table_data ).
  get element via lead selection
    lo_el_table_data = lo_nd_table_data->get_element(  ).
     CALL METHOD LO_EL_TABLE_DATA->GET_INDEX
       RECEIVING
         MY_INDEX = lv_selected_index
case lv_selected_index.
when 1.
data lo_cmp_usage type ref to if_wd_component_usage.
lo_cmp_usage =   wd_this->wd_cpuse_comp_one( ).
if lo_cmp_usage->has_active_component( ) is initial.
   lo_cmp_usage->create_component( ).
endif.
   DATA lo_api_main TYPE REF TO if_wd_view_controller.
  lo_api_main = wd_this->wd_get_api( ).
  CALL METHOD LO_API_MAIN->FIRE_PLUG
    EXPORTING
     PARAMETERS =
      PLUG_NAME  = 'OP_TO_ONE'
clear lo_cmp_usage.
when 2.
DATA lo_api_main TYPE REF TO if_wd_view_controller.
  lo_api_main = wd_this->wd_get_api( ).
  CALL METHOD LO_API_MAIN->FIRE_PLUG
    EXPORTING
     PARAMETERS =
      PLUG_NAME  = 'OP_TO_TWO'
  data lo_cmp_usage type ref to if_wd_component_usage.
   lo_cmp_usage =   wd_this->wd_cpuse_comp_two( ).
   if lo_cmp_usage->has_active_component( ) is initial.
     lo_cmp_usage->create_component( ).
   endif.
endcase.
endmethod.
Regards,
Prosenjit.