DesktopAcrylicController.StateChanged Event

Definition

Namespace:

Microsoft.UI.Composition.SystemBackdrops

Occurs when the state of the system backdrop has changed.

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

public event TypedEventHandler<ISystemBackdropControllerWithTargets,object> StateChanged;

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

Public Custom Event StateChanged As TypedEventHandler(Of ISystemBackdropControllerWithTargets, Object) Implements StateChanged

Event Type

TypedEventHandler<ISystemBackdropControllerWithTargets,Object>

TypedEventHandler<ISystemBackdropControllerWithTargets,IInspectable>

Implements

StateChanged

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.

See also

• State