Don't use QCursor::pos in QTabBar and fix hover handling

Relying on QCursor::pos makes tests fragile and prevents multi-seat support.
Instead, record the mouse position in the already existing event handling,
and use that instead. Styles might use either WA_Hover or enable mouse
tracking for the widget to enable hover-effects, so we need to support both.
Fix the scenario where a newly inserted tab ends up under the mouse, which
was previously not handled correctly (only the case of removing a tab was).

Clean up the repaint management when the hovered tab changes; just call
update on the old rect, and then later update on the new rect; there's no
need to make a copy first, updates are posted and compressed.

Add a unit test that makes sure that we paint tabs that should be under the
mouse in the hovered state. Since not all styles enable hovering and/or
mouse tracking in all cases, use a style sheet for those styles that don't.

Change-Id: I7cdbb18e9e04b52651e273680fec87b50cb81e05
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

0 files changed, 0 insertions, 0 deletions