scrollTo not working properly

Megamouse

When using this code inside a tablewidget refresh function the scrollTo sometimes jumps to undefined places.

gameList->selectRow(row);
gameList->sortByColumn(m_sortColumn, m_colSortOrder);
gameList->verticalHeader()->setMinimumSectionSize(m_Icon_Size.height());
gameList->verticalHeader()->setMaximumSectionSize(m_Icon_Size.height());
gameList->resizeRowsToContents();
gameList->resizeColumnToContents(0);
gameList->scrollTo(gameList->currentIndex(), QAbstractItemView::PositionAtCenter);

Adding

gameList->scrollToBottom();
gameList->scrollToTop();

directly in front of the scrollTo(...) fixes this weird issue. The scroll now always centers the desired row.

We are wondering if this is a Qt bug or if we missed something.
It's not really that important since the workaround is doing fine, but we are really curious if that can be avoided.

Thx

samdol

@Megamouse
I am not the expert but what I heard is that there is some kind of delay on scrollTo() function. So I had to use singleshot 500ms to make it work properly.

raven-worx

@Megamouse
what data does your list view contain? Does it contain multi-line text?
I guess not all of your items are layouted yet when you call scrollTo()?

Try the following (you need to subclass the list view widget since the methods are protected):

void myListView::layoutItems()
{
    scheduleDelayedItemsLayout();
    executeDelayedItemsLayout();
}

Megamouse

So: after the hint with toScroll delay we noticed that the table layout/state might not be fully up to date with its contents.
I went through the table-filling code step by step and found that one of our devs used setRowCount(0); to clear the table without losing the headers .
I replaced it with clearContents(); and now it seems to be working.

If it still has issues I may try the schedule .

Thanks for the inspiration!