PowerBuilder - Problems and Solutions - Quicken-style Incremental Searches

n_cst_dwsrv_dropdownsearch

Usage :

Use this object to add code to u_dw that provides automatic scrolling in DropDownDataWindows.

To use this service:

1. Enable the service by calling the u_dw of_SetDropDownSearch function (preferably in the Constructor of the datawindow).

This.of_SetDropDownSearch(TRUE)

2. Specify the DropDownDataWindow column for which the service is enabled (preferably in the Constructor of the datawindow).

If (IsValid(inv_dropdownsearch) = TRUE) Then
   inv_dropdownsearch.of_Register("dept_id")
End If

3. In the DataWindow control's EditChanged event, add a call to the n_cst_dwsrv_dropdownsearch pfc_EditChanged event:

If (IsValid(inv_dropdownsearch) = TRUE) Then
   inv_dropdownsearch.Event pfc_EditChanged(row,dwo,data)
End If

4. In the DataWindow control's ItemFocusChanged event, add a call to the n_cst_dwsrv_dropdownsearch pfc_ItemFocusChanged event:

If (IsValid(inv_dropdownsearch) = TRUE) Then
   inv_dropdownsearch.Event pfc_ItemFocusChanged(row,dwo)
End If

5. Set the SEARCHABLE datawindow's column Format to be :

     Allow Editing : True
     Always Show List : True

6. Set ItemError to the appropriate error code