Master-detail driven by choice list

Question

I have a choice list for Dept as the master to drive a detail table Emp. The choice list is implemented below. How do I then drive the detail table by the selected item in the choice list? Can this be done declaretively, or must be done by java code. There are examples to show how to do bc4j:choice but there is no example to explain how to drive the detail table after the choice list is done.
<bc4j:viewObjectScope name="DeptView">
<contents>
<bc4j:choice attrName="Dept">
<contents>
<bc4j:viewObjectScope name="DeptView">
<bc4j:rowStamp>
<bc4j:option attrName="DeptId" textAttrName="DeptName"/>
</bc4j:rowStamp>
</bc4j:viewObjectScope>
</contents>
</bc4j:choice>
</contents>
</bc4j:viewObjectScope>
<!-- define detail table here -->

Answer 1

Hi Arjuna,
Thank you very much for the help. Here is the code for the VO registrations and the detail table. If the rangeSize=1 in master VO InstanceView, the detail table is initialized to the first master row. However, the master choice list shows only the first row. If rangeSize is 3 then the list is populated with 3 rows but nothing is selected in the detail table. I have two questions: a) how to set the initial master row? b) how to decide how many rows to set in rangeSize? In a sense a choice list is just a single column table with a single selection, one would expect the choice list to provide the simular mechanism of a table.
<!-- register OV -->
<bc4j:registryDef>
<bc4j:rootAppModuleDef name="AppWorkViewLink1AppModule"
definition="NamingObj.NamingObjPkgModule"
releaseMode="stateful" >
<bc4j:viewObjectDef name="InstanceView"
rangeSize="3" />
<bc4j:viewObjectDef name="AppAreaView"
rangeSize="10" />
</bc4j:rootAppModuleDef>
</bc4j:registryDef>
<!-- Master choice list -->
<!-- Details table -->
<bc4j:viewObjectScope name="AppAreaView" >
<contents>
     <tableLayout cellPadding="5" width="100%">
     <contents>
<bc4j:table name="viewTable" automatic="true"
width="100%" alternateText="No rows found">
<tableSelection>
<!-- single selection for each row in the table -->
<singleSelection selectedIndex="0" shortDesc="Select Row">
<contents>
<!-- the details button causes the currently selected
row to be sent to the details page -->
<submitButton text="Details"
ctrl:event="details" />
<!-- the update button causes the currently selected
row to be sent to the update page -->
<submitButton text="Update"
ctrl:event="update" />
<!-- the delete button causes the currently selected
row to be removed -->
<submitButton text="Delete"
ctrl:event="delete" />
</contents>
</singleSelection>
</tableSelection>
<!-- the key identifying the current row in the table -->
<bc4j:keyStamp>
<bc4j:rowKey name="key" />
</bc4j:keyStamp>
<!-- the column rendered for each attribute -->
<bc4j:columnStamp>
<!-- the attrScope is automatic -->
<bc4j:column>
<columnHeader>
<!-- the sortableHeader defaults its attrName
from the current attrScope -->
<bc4j:sortableHeader/>
</columnHeader>
<contents>
<!-- renders the current attribute as read only -->
<bc4j:input readOnly="true"/>
</contents>
</bc4j:column>
</bc4j:columnStamp>
</contents>
</bc4j:table>
</contents>
</tableLayout>
</contents>
</bc4j:viewObjectScope>