[SOLVED] Problem in moving QListWidget's Item either up or down by one position

M_31

HI all,
I want to move the selected item from QListWidget either moving UP or Down by one position....by pressing separate
PushButton..
@
void CTestDlg::UpButtonPressed()
{
int nCurRow = ui->listWdgt->currentRow();
if( nCurRow== 0)
return;

QListWidgetItem *curItem = ui->listWdgt->currentItem();
QListWidgetItem *prevItem = ui->listWdgt->item( nCurRow - 1 );

ui->listWdgt->scrollToItem( curItem,QAbstractItemView::PositionAtTop );
}

void CTestDlg::downButtonPressed()
{
int nListCount = ui->listWdgt->count();
int nCurRow = ui->listWdgt->currentRow();
if( nListCount == nCurRow )
return;

QListWidgetItem *curItem =  ui->listWdgt->currentItem();
QListWidgetItem *prevItem =  ui->listWdgt->item( nCurRow + 1 );

ui->listWdgt->scrollToItem( curItem,QAbstractItemView::QAbstractItemView::PositionAtBottom );

}
@

Please let me know whether i am doing anything wrong on this???

vsorokin

from Reference:
@void QListWidget::scrollToItem ( const QListWidgetItem * item, QAbstractItemView::ScrollHint hint = EnsureVisible ) [slot]@

bq. Scrolls the view if necessary to ensure that the item is visible.

as I think you need change item position, not scroll to item.

yo can do it with two methods:

@QListWidgetItem * QListWidget::takeItem ( int row )@
for extracting item from list
and
@void QListWidget::insertItem ( int row, QListWidgetItem * item )@
for inserting to needed position.

So.. You can get something like:

@ QListWidgetItem *curItem = ui->listWdgt->takeItem(nCurRow);
ui->listWdgt->insertItem( nCurRow + 1, curItem );@

Note: Don't forget check limits.

goetz

[quote author="Vass" date="1317922866"]
Note: Don't forget check limits.[/quote]

And don't forget that count() is 1 based, and currentRow() is 0 based, i.e. the first row is #0, not #1. And the last row is count() - 1.

M_31

Thanks Vass and Volker...its working absolutely fine...

Thanks for the valuable inputs..