[Qt-interest] QAbstractItemView::scrollToBottom and multiple threads

[Stefan Bisplinghoff]

Hi all!

I use a QListWidget to display some log messages in my application.
The items are added from another single thread.

To keep track of the latest messages, I want to scroll down the list
after each item insertion. So what I do in the worker thread is

m_listWidget->addItem('Some Text');
m_listWidget->scrollToBottom();


This results in a very strange behaviour. If I add several items
successively in a short time, all items are displayed correctly, but the
GUI thread gets very busy (up to 100% CPU).  However, the GUI is still
useable, so events are processed.

Moreover, if I add the new list items too fast, the QListWidget throws
an "index out of range" error, while redrawing the widget.


Both errors don't happen, if I omit the scrollToBottom command.
Are there known problems with the insertion of new items while the GUI
thread handles the scrolling?

Regards,
 Stefan

P.S.: Using Qt 4.5.1 built with VS2008.

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