OpenEuphoria

Re: [Win32lib] Listview speed

• Posted by Derek Parnell <ddparnell at bigpond.com> Jun 14, 2002
• 500 views

Ooops, I forgot to address the other issue you raised - how to use the
built-in sorting of the library.

I've adjusted the demo example to so how to do that.

---------------------
object VOID
include win32lib.ew
include sort.e
without warning

constant w = createEx(Window,"test load", 0, 0, 0, 400, 0400, 0, 0),
         lv = createEx(ListView, {"English","Digit", "Thai"}, w, 10, 10,
300, 300, LVS_REPORT , 0)

global procedure loadLVInfo(atom id, sequence alldata)
    atom hWnd
    atom LV_ITEM
    sequence data
    integer msg

    hWnd = getHandle(id)

    VOID = w32Func( xSendMessage, {hWnd, LVM_DELETEALLITEMS, 0, 0})
    LV_ITEM = acquire_mem(0,  SIZEOF_LVITEM )

    for i = 1 to length(alldata) do
        store( LV_ITEM, LVITEM_iItem, i-1)
        store( LV_ITEM, LVITEM_lParam, i )
        data = alldata[i]
        for j = 1 to length(data) do
            store( LV_ITEM, LVITEM_iSubItem, j-1 )
            store( LV_ITEM, LVITEM_pszText, data[j] )
            store( LV_ITEM, LVITEM_cchTextMax, length(data[j]) )
            if j = 1 then
                msg = LVM_INSERTITEM
                store( LV_ITEM, LVITEM_mask,
or_all({LVIF_TEXT,LVIF_PARAM}) )
            else
                msg = LVM_SETITEM
                store( LV_ITEM, LVITEM_mask, LVIF_TEXT )
            end if
            VOID = w32Func( xSendMessage, { hWnd, msg, j-1, LV_ITEM } )
        end for

    end for

    release_mem(LV_ITEM)
end procedure

sequence theData theData = {}

theData = append(theData, {"One", "1", "neung"})
theData = append(theData, {"Two", "2", "song"})
theData = append(theData, {"Three", "3", "sam"})
theData = append(theData, {"Four", "4", "si"})
theData = append(theData, {"Five", "5", "ha"})
theData = append(theData, {"Six", "6", "hok"})
theData = append(theData, {"Seven", "7", "jet"})
theData = append(theData, {"Eight", "8", "baht"})
theData = append(theData, {"Nine", "9", "kow"})
theData = append(theData, {"Ten", "10", "sip"})


loadLVInfo(lv, theData)

-- Set the attributes to use the built-in sorting.
VOID = setLVAttr( lv, {{kLVColTypes, {'i','n','i'}},
                       {kLVSortSeq, {1, 1, 1}}
                      })


WinMain(w, Normal)

---------------------
Derek

----- Original Message -----
From: <euman at bellsouth.net>
To: "EUforum" <EUforum at topica.com>
Sent: Saturday, June 15, 2002 9:23 AM
Subject: [Win32lib] Listview speed


>
> 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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