ListView / delete/insert / nIndex

[Hurricane]

Hi team,
in my application there is a selection option and I wanted to change the position of the items. So I used:

Código: Seleccionar todo

   nIndex:=oItem:nIndex
   oItem:Delete() // ::nIndex:=0
   oItem:=::oListView1:InsertItem( oItem:cText,,,,, oItem:lChecked, nIndex+1 )

LISTVIEW.png (14.05 KiB) Visto 15808 veces

I noticed that after deletion or insertion, some items will have outdated nIndex.
In the image, I only clicked once on item 2, which moved it, but...

Is there any alternative?
If you want, I can send this small example.

[ignacio]

Hi,

I'm afraid 'nIndex' is useless for your purpose when you delete and insert items. The time consuming of reordering all the items is useless.

Try with something like this:

Código: Seleccionar todo

METHOD nPos()    INLINE AScan( ::oParent:aItems, {|v| v == Self } )

Regards,

[Hurricane]

Thank you Ignacio.

unfortunately it didn't work.
I've attached a small example.

One alternative I used was to just change the values, without deleting/inserting items, until I found a better solution.

[ignacio]

Hi,

I'm afraid there is not an easy solution to your problem. The nIndex property should be considered a creation order number, Just that. If you take a look a the code you will that indeed when the record is <<inserted>> on the control, the underlying array does not take into account. The best and only solution for your own use, is to use the cargo property to do the job.

Regards,