ISystemBackdropControllerWithTargets.StateChanged Event

// Register
event_token StateChanged(TypedEventHandler<ISystemBackdropControllerWithTargets, IInspectable const&> const& handler) const;

// Revoke with event_token
void StateChanged(event_token const* cookie) const;

// Revoke with event_revoker
ISystemBackdropControllerWithTargets::StateChanged_revoker StateChanged(auto_revoke_t, TypedEventHandler<ISystemBackdropControllerWithTargets, IInspectable const&> const& handler) const;

event TypedEventHandler<ISystemBackdropControllerWithTargets,object> StateChanged;

function onStateChanged(eventArgs) { /* Your code */ }
iSystemBackdropControllerWithTargets.addEventListener("statechanged", onStateChanged);
iSystemBackdropControllerWithTargets.removeEventListener("statechanged", onStateChanged);
- or -
iSystemBackdropControllerWithTargets.onstatechanged = onStateChanged;

Event StateChanged As TypedEventHandler(Of ISystemBackdropControllerWithTargets, Object) 

Event Type

Remarks

You can subscribe to this event to be notified when the SystemBackdropState changes between Active and Fallback/High Contrast. For example, you might have other non-system backdrop UI you would like to update based on the system backdrop material state.

Applies to

See also

• State