Moving items between two views.

[fullmetalcoder]

These views have to be contains single items set, but every item have to be contained in one and only one view. Before this I do it using available model and selected model. This approach results in very slow time in interaction. Now I try to another approach to have single source model and different list of displayed data.

Well I suggest you add a flag/property/whatever-you-name-it to your items which will define in which view it shall be displayed. Then each view will be fed by a proxy which will display only items with the matching flag. This flag can be any type for which it exists comparisions operators (QString, QChar, QPoint, ...) but an integer is probably the best solution if you're looking for speed.

Then moving an item from a view to another will be as simple as :

• changing the aforementionned flag
• notifying a change to the view (either a dataChanged(parentIndex, parentIndex) or a complexer but possibly more efficient computation and {begin,end}{Insert,Remove}Rows()...)

[wysota]

If both views don't share any data from the model (for example one displays all odd rows and the other all even rows), then I'd say it might be better to have two separate source models. But it is hard to make that a rule of thumb.