class ViewRef
Defined at line 439 of file fidling/gen/sdk/fidl/fuchsia.ui.views/fuchsia.ui.views/cpp/fidl/fuchsia.ui.views/cpp/natural_types.h
A ViewRef is a handle to a kernel object which identifies a unique View
across the system. Two ViewRefs to the same View have the same KOID.
Clients use a ViewRef to identify a View, to validate a View, and to
receive a View invalidation signal.
As part of View creation, the client creates a linked
ViewRef/ViewRefControl pair and hands the pair to Scenic (ViewRefControl is
described below). The client must remove the ViewRef's signal
capabilities; otherwise the View is not created.
The client may freely clone its ViewRef and share it, even before sending
it to Scenic.
Example 1. Accessibility accepts a ViewRef from a client to group the
semantic nodes, and semantic operations, associated with a client's View.
It must validate a client's ViewRef with Scenic.
Example 2. We use ViewRefs to create a FocusChain, which identifies Views
considered as "in-focus" down the View hierarchy. When a View is destroyed,
Scenic signals to all FocusChain holders that the ViewRef is now invalid.
Public Methods
void ViewRef (Storage_ storage)void ViewRef (::zx::eventpair reference)void ViewRef ()Default constructs a |ViewRef| only if all of its members are default constructible.
Defined at line 450 of file fidling/gen/sdk/fidl/fuchsia.ui.views/fuchsia.ui.views/cpp/fidl/fuchsia.ui.views/cpp/natural_types.h
void ViewRef (ViewRef && )Defined at line 453 of file fidling/gen/sdk/fidl/fuchsia.ui.views/fuchsia.ui.views/cpp/fidl/fuchsia.ui.views/cpp/natural_types.h
ViewRef & operator= (ViewRef && )Defined at line 454 of file fidling/gen/sdk/fidl/fuchsia.ui.views/fuchsia.ui.views/cpp/fidl/fuchsia.ui.views/cpp/natural_types.h
const ::zx::eventpair & reference ()::zx::eventpair & reference ()ViewRef & reference (::zx::eventpair value)Setter for reference.
void ViewRef (::fidl::internal::DefaultConstructPossiblyInvalidObjectTag )Friends
class MemberVisitorclass NaturalStructCodingTraits