Hi,
I use boost::circular_buffer as underly data stru in my own model,
I set capacity of circular_buffer in advance. For example , 30000. If I push_back more than 30000 data. the first ones will be deleted.
The question is: What signal should I emit to notice the QTableView to act correctly?

I tyr emit layoutabouttobechanged() layoutChanged(), but the selection stateis not act properly with the data push_back!

Another test is
Qt Code: 
  1. beginRemoveRows(QModelIndex(),0,alarms.size()-1);
  2. 		endRemoveRows();
  3. 		beginInsertRows(QModelIndex(),max_alarm_num-alarms.size(),max_alarm_num-1);
  4. 		endInsertRows();
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It seems work, but I doubt it as in the Qt Assistant
When reimplementing insertRows() in a subclass, you must call this function before inserting data into the model's underlying data store.