bsp:call doubt

Question

Hello All,
When we call the sub controllers using the bsp element call of the bsp extension i.e. say for example
<bsp:call url = "contorller01.do" comp_id = "subc1" />
from the main view which is called by the top controller, this must be listed in the parameter m_subcontrollers of the top controller; right ?
Or is it a must that we should redefine the DO_INIT of the top controller, and add the following lines
  DATA: subc1 TYPE REF TO z_c_10017_test08_cntrl1.
  subc1 ?= create_controller( controller_name = 'controller01.do'
controller_id   = 'subc1' ).
in aditions to the above.
In the SAP example itmvc2, the DO_INIT method of the controller CL_BSP_ITMVC2_MAIN is not redefined. But the parameter m_subcontrollers of the controller CL_BSP_ITMVC2_MAIN list the sub controllers with ids "ad" and "fl" which was called using <bsp:call> from the main view.
I tried a similar one, but the parameter m_subcontrollers of the top controller does not list the subcontrollers I call using <bsp:call> in the main view, unless and until I redefine the  DO_INIT of the top controller and use the service method create_controller in addition to <bsp:call>.
I hope the question is clear.
Could any one give me some idea on this.
Best Regards,
Loveline.

Answer 1

Hi Sebastian,
This is also what I expected, but this is not happening in my test BSP Application. I have included the code below
Layout of main.htm
<htmlb:content>
  <htmlb:page title="Main view " >
    <htmlb:form id     = "myform"
                method = "post" >
      <htmlb:tray id     = "T1"
                  title  = "View1"
                  design = "form" >
        <bsp:call url     = "controller01.do"
                  comp_id = "subc1" />
      </htmlb:tray>
    </htmlb:form>
  </htmlb:page>
</htmlb:content>
DO_REQUEST of main.do
method DO_REQUEST .
  DATA : view TYPE REF TO if_bsp_page.
  dispatch_input( ).
  view = create_view( view_name = 'main.htm' ).
  call_view( view ).
endmethod.
Layout of view1.htm
<table>
<tr>
<td>
<htmlb:label id   = "L1"
             for  = "IF1"
             text = "Input Field" />
</td>
<td>
<htmlb:inputField id   = "IF1"
                  size = "10" />
</td>
</tr>
<tr>
<td>
<htmlb:button id      = "B1"
              text    = "Click"
              onClick = "myClickHandler" />
</td>
</tr>
</table>
DO_REQUEST of controller01.do
method DO_REQUEST .
  DATA : view TYPE REF TO if_bsp_page.
  view = create_view( view_name = 'view1.htm' ).
  call_view( view ).
endmethod.
m_subcontrollers parameter of main.do (top controller) doesn't contain the subcontroller with id subc1.
Is there anything that I am missing ? and are you sure <bsp:call> will register the subcontroller with the top level controller ?
Thanks and Regards,
Loveline.