Updating of view instead of full model's data repainting

[Toniy]

Hello everyone.

I have a model subclassed from QAbstractItemModel and QTableView (or another derivant of QAbstractItemView). Model catches lots of data that arrives very frequently (e.g. one data entry for every 10ms).

So the questions are:

1. Does view repaint all model's entries from scratch on every model update by default?
2. If answer of first question is "yes", is there any proper way to update shown data or paint only visible data instead of full repainting?

My first thoughts of it were making some delay in model and implementing delegate. Delay of repainting was useless because even one iteration of full repainting lasts for critical time when there is a lot of data accumulated (i.e. time of full repainting becomes longer than time elapsed between two updatings of model).

So I thought about delegate. Thus next bunch of questions is:

3. Is there any proper way to check visibility of obtained data with delegate? (I figured out that proper implementation of delegate defines methods of repainting and intercommunications of model and view but not certain data selection, am I right about it?)

4. If all of my thougts are completely wrong does solution of that issue exists at all?

Thanks in advance.

P.S. Are specified tags for this thread correct and sufficient?

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Update: at the moment I found this example of handling big data sets with ModelViews: http://doc.qt.io/qt-5/qtwidgets-item...e-example.html