Blocking updates on views

[NoRulez]

Hi,

is there a way to block all updates on a view (e.g. TableView). I want to update the views only if I emit signal.

Did anybody know a way how i can do this?

Best Regards
NoRulez

[wysota]

There is a property available - QWidget::updatesEnabled but be sure you know what you are doing.

[NoRulez]

Thank you very much, this seems to solve my problem.

Best Regards
NoRulez

[NoRulez]

Ok, it doesn't solve the problem, which means that the gui is still blocking.

I've attached a small example which demonstrate the problem.

I hope someone could help.

Best Regards
NoRulez

[tbscope]

Do not show all your data at once, use fetchmore.
http://doc.qt.nokia.com/4.6/itemviews-fetchmore.html

Do your data parsing or loading in a thread or asynchronous and use that data to populate your model. Use fetchmore to prevent blocking.

Edit: To be more clear: in your thread you have this line: m_pModel->insertRows(m_pModel->rowCount(), 1);
Leave adding rows to the model, not your thread. Create a custom model, keep a list of data inside the model and add data to that list via your thread (signals will work very well for this). Then, when you scroll in your view, the model will check if there's more data to display and adds the next few rows.

[wysota]

QObject subclasses are not thread-safe, don't try accessing the model directly from a worker thread or this will lead to trouble. Use signals and slots instead. And update your model in chunks, not a row at a time.