On Thursday, 9 July 2020 14:58:05 BST Francis Herne wrote: > On Wednesday, 8 July 2020 19:20:33 BST Murphy, Sean wrote: > > Is there a way to temporarily pause a QTableView while the underlying > > model > > continues to update? > > > > My scenario: > > - I have two separate QTableViews connected to a single model. > > - The model is being fed from a continuously updating data source, i.e. a > > > > sensor. - One of the views needs to remain live at all times - so as the > > model's data updates, the view updates immediately. > > > > For the other view, the user should be able to "pause" that view's > > display, > > spend as much time as they want looking at the data on that paused table, > > and then whenever they choose, they can un-pause that view and it returns > > to updating constantly. This view has to remain fully usable (scroll bars > > work, clicks work, etc.) while paused. > > > > The only idea I have at the moment is to have a second model object, that > > is identical to the first one, except that it isn't connected to the > > sensor. At the time the user wants to pause the view, I copy the current > > data out of the main model into the second model, swap out the paused > > view's model out to the second model, and then swap it back to the main > > model when the user wants to go back live. > > > > Am I missing something easier? The only other idea I had was that I could > > try to change the second view from a pure QTableView to one that inherits > > from QTableView and then have my own slot that disconnects/connects the > > signals between the model and that view based on the when the user wants > > to > > pause/resume. > > > > Sean > > You could have a QProxyModel subclass with a 'timeRange' (or so) property. > > When set to null it would simply relay everything to the backing model, > otherwise it would provide only the relevant subset. > > I think this would be much easier than copying the data, or swapping models > in and out. > > -Francis H
To be more precise - you should subclass QSortFilterProxyModel and override `filterAcceptsRow()` and/or `filterAcceptsColumn()` to hide data outside the time period you want. _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
