OpenEuphoria

[Win32lib] Listview speed

• Posted by euman at bellsouth.net Jun 14, 2002
• 571 views

Hello Matt Lewis and all,

The (below) procedure is faster for loading Items into a listview
however, I havent figured out how I plan to sort the data using this
routine. I'll work on this some more tonight.

You also can not sort the listview using the current Win32lib sort
algorythm and this procedure, perhaps someone who knows the lib
better would do this. 

If your plans are to not allow sorting then this will be a better choice 
for speed. 

-- add to Win32lib 
global procedure LoadLVInfo(atom id, sequence alldata)
integer howmany
  handle = getHandle(id)
  howmany = length(alldata)
  for i = 1 to howmany do
     LV_ITEM = acquire_mem(0,  SIZEOF_LVITEM )
     store( LV_ITEM, LVITEM_mask, LVIF_TEXT )
     store( LV_ITEM, LVITEM_iItem, i-1)
     data = alldata(i)           
     subitem = 0 
     for x = 1 to length(data) do                  
        store( LV_ITEM, LVITEM_iSubItem, subitem )
        store( LV_ITEM, LVITEM_pszText, data[x] )
        store( LV_ITEM, LVITEM_cchTextMax, length(data[x]) )
        subitem += 1
        if subitem = 1 then
          junk = w32Func( xSendMessage, { handle, LVM_INSERTITEM, 0, LV_ITEM } )
        else
junk = w32Func( xSendMessage, { handle, LVM_SETITEM, i-1, LV_ITEM } )
        end if             
      end for
      store( LV_ITEM, LVITEM_lParam, i )
      release_mem(LV_ITEM)
  end for
end procedure

P.S this routine would be faster if hacked. 
e.g straight pokes( ) instead of store( ) and/or, inlining the routine in your
program.

Good Day!

Euman
euman at bellsouth.net

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