Pointer Focus Registration Code !!install!! Review

class FocusRegistrar Map<WidgetID, FocusCandidate> activeCandidates; WidgetID currentLockedFocus; const float THRESHOLD_ENTER = 0.6; // Requires 60% confidence to enter const float THRESHOLD_EXIT = 0.3; // Requires drop below 30% to exit (Hysteresis)

Test on synthetic events. Log your transitions. And for the love of all that is responsive, never, ever call register_pointer_focus inside a layout pass. pointer focus registration code