[Qt-interest] QTreeView expand delay

[Malyushytsky, Alex]

I am not sure about the best place, but I expect you might not need it.
You probably can just disable QTreeView update, change model, set nodes expanded, do other changes then enable QTreeview update. A result will be fastest posible, single visual change on the screen.


setUpdatesEnabled(false);

 bigVisualChanges();

 setUpdatesEnabled(true);
Alex

________________________________
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Deepak Chandran
Sent: Saturday, January 31, 2009 9:57 PM
To: Qt Interest
Subject: [Qt-interest] QTreeView expand delay

In my application, I use a tree view to summarize a model. The model can change due to various things, so I generate a new model every time there is a change. When I assign the new model to the tree view, I make store the original nodes that were expanded and try to reproduce the same structure after updating the model. However, the expand has no effect when it is done immediately after the model update. I read in a previous post that there is a delay between updating the model and being able to expand/collapse nodes.
So, if I want to constantly update the model and adjust which nodes are expanded at the same time, where would be the best place to do this (i.e. which signal/slot)?

Thanks.


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