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The models `data()` method should implement the `Qt::AccessibleTextRole` on which a suitable QString containing the cell content description must be returned. Don't return null or empty strings or variants as then the used screen reader (NVDA) tends to generate a generic **cell** description.
The usage of `Qt::AccessibleDescriptionRole` is not encouraged at the moment. Data returned in this role are appended pas data obtained via `Qt::AccessibleTextRole` and can create confusion.
## Keyboard Navigation
All control elements should be navigable by using keyboard only. Forget about the mouse cursor for the moment.