Struct ViewProperties

pub struct ViewProperties {
    pub bounding_box: BoundingBox,
    pub inset_from_min: Vec3,
    pub inset_from_max: Vec3,
    pub focus_change: bool,
    pub downward_input: bool,
}

Represents the properties for a View.

Fields

bounding_box: BoundingBox

The View’s bounding box extents can be defined as: { bounding_box.min, bounding_box.max } Content contained within the View is clipped to this bounding box.

inset_from_min: Vec3

insets_from_min and insets_from_max specify the distances between the view’s bounding box and that of its parent.

These properties are not strictly enforced by Scenic, but only used as hints for clients and other components that receives ViewProperties:

View clients can assume that anything drawn outside of { bounding_box.min + inset_from_min, bounding_box.max - inset_from_max } may be obscured by an ancestor view. The reason for obscuring, and the rules surrounding it, is specific to each product.

inset_from_max: Vec3

focus_change: bool

Whether the View can receive a focus event; default is true. When false, and this View is eligible to receive a focus event, no focus/unfocus event is actually sent to any View.

downward_input: bool

Whether the View allows geometrically underlying Views to receive input; default is true. When false, Scenic does not send input events to underlying Views.

Trait Implementations

impl Clone for ViewProperties

fn clone(&self) -> ViewProperties

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ViewProperties

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<D> Decode<ViewProperties, D> for ViewProperties

where D: ResourceDialect,

fn new_empty() -> ViewProperties

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.

unsafe fn decode( &mut self, decoder: &mut Decoder<'_, D>, offset: usize, _depth: Depth, ) -> Result<(), Error>

Decodes an object of type T from the decoder’s buffers into self.

impl<D> Encode<ViewProperties, D> for &ViewProperties

where D: ResourceDialect,

unsafe fn encode( self, encoder: &mut Encoder<'_, D>, offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID.

impl PartialEq for ViewProperties

fn eq(&self, other: &ViewProperties) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for ViewProperties

fn partial_cmp(&self, other: &ViewProperties) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl TypeMarker for ViewProperties

type Owned = ViewProperties

The owned Rust type which this FIDL type decodes into.

fn inline_align(_context: Context) -> usize

Returns the minimum required alignment of the inline portion of the encoded object. It must be a (nonzero) power of two.

fn inline_size(_context: Context) -> usize

Returns the size of the inline portion of the encoded object, including padding for alignment. Must be a multiple of inline_align.

fn encode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and encoding requires no validation. When true, we can optimize encoding arrays and vectors of Self::Owned to a single memcpy.

fn decode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and decoding requires no validation. When true, we can optimize decoding arrays and vectors of Self::Owned to a single memcpy.

impl ValueTypeMarker for ViewProperties

type Borrowed<'a> = &'a ViewProperties

The Rust type to use for encoding. This is a particular Encode<Self> type cheaply obtainable from &Self::Owned. There are three cases:

fn borrow( value: &<ViewProperties as TypeMarker>::Owned, ) -> <ViewProperties as ValueTypeMarker>::Borrowed<'_>

Cheaply converts from &Self::Owned to Self::Borrowed.

impl Copy for ViewProperties

impl Persistable for ViewProperties

impl StructuralPartialEq for ViewProperties