OpenEuphoria

RE: Listview Item identifiers

• Posted by Tony Steward <lockmaster67 at aol.com> Oct 02, 2002
• 428 views

Hi Rangi,
Use these procedures and then simple setLVIndex(LVID, Row)

global function getLViItemFromlParam( integer id, integer lv_id )
    atom findlv, item

    findlv = struct_LVFINDINFO( LVFI_PARAM, "", lv_id, 0, 0, 0 )
    item = sendMessage( id, LVM_FINDITEM, -1, findlv )
    release_mem( findlv )

    return item
end function

-- Can set multiple selections, and first item will be made visible
global procedure setLVIndex( integer id, object sel )
    integer iItem
    atom lvitem, VOID
    if atom(sel) then
        sel = {sel}
    end if
    lvitem = struct_LVITEM( LVIF_STATE, 0, 0, LVIS_SELECTED, 
LVIS_SELECTED,
0,0,0)
    for i = length( sel ) to 1 by -1 do
        iItem = getLViItemFromlParam( id, sel[i] )
        store( lvitem, LVITEM_iItem, iItem )
        VOID = sendMessage( id, LVM_SETITEMSTATE, iItem, lvitem )
    end for
    VOID = sendMessage( id, LVM_ENSUREVISIBLE, iItem, 0 )
end procedure


Thanks
Tony Steward


totorangi at hotmail.com wrote:
> As often happens I managed to solve most of this soon after posting! I 
> had addLV.. and setLV.. back to front.  I mistakenly said that 
> setLVItemText uses the item Identifier whereas it actually needs the 
> current row Index.  Found a post about LVFINDINFO and so have used this 
> to create a function called findLVItemIndex that returns the current 
> item index after being passed an item identifier. Seems to do the trick. 
> 
>  
> However, I would still like to know how to programmatically select and 
> focus a row in a ListView.
> 
> Rangi
> 
> totorangi at hotmail.com wrote:
> > Trying to come to grips with Listviews and have found the archive here 
> > useful but still have a problem with Identifiers.
> > 
> > I have a listview with several columns of data.  I also maintain a 
> > sequence that duplicates data in the listview plus has additional data. 
> > I want to programmatically update particular rows in the Listview with 
> > data from the sequence.  
> > 
> > I made the now obvious classic mistake of using the Index returned from 
> > addLVItem as my key for updating the Listview and it worked until I 
> > happened to sort the listview.  I use setLVItemText and SetLVImage to 
> > update the Listview and I now see that they need the item Identifier and 
> > 
> > 
> > not the row Index.  Problem is then how to get the item's Identifier 
> > after doing each initial addLVItem.  The only way I can find of getting 
> > an Identifier is with getLVSelected but this assumes that a row is 
> > selected in the first place.  This is not the case after the AddLVItem. 
> > I have tried a setIndex to programmatically select the row after it is 
> > added but this doesn't seem to work on ListViews.  
> > 
> > Would appreciate tips on this.  
> > 
> > Thanks
> > Rangi
> > 
> > Also, is it possible to view a whole thread on this list ?  Search 
> > returns useful stuff but I can't find any way of seeing the threads. 
> > 
> > 



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They will always find the easiest way to complete it.