Struct ViewportProperties

pub struct ViewportProperties {
    pub logical_size: Option<SizeU>,
    pub inset: Option<Inset>,
    /* private fields */
}

The properties of a Viewport as defined by the parent. This data, along with the set of attached Transforms, will be used to compute the LayoutInfo for the View of the Viewport. ViewportProperties must have logical_size set at least once. This is the initial size that will drive the layout of the child.

Fields

logical_size: Option<SizeU>

The size of the Viewport in logical pixels. This maps directly to the logical_size field in LayoutInfo. The valid logical_size must have positive X and Y components.

inset: Option<Inset>

The offsets between the edges and the visible rectangle of the Viewport. This maps directly to the inset field in LayoutInfo. The valid inset must have all components greater than or equal to 0.

Trait Implementations

impl Clone for ViewportProperties

fn clone(&self) -> ViewportProperties

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ViewportProperties

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

Formats the value using the given formatter.

impl<D> Decode<ViewportProperties, D> for ViewportProperties

where D: ResourceDialect,

fn new_empty() -> ViewportProperties

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 Default for ViewportProperties

fn default() -> ViewportProperties

Returns the “default value” for a type.

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

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 ViewportProperties

fn eq(&self, other: &ViewportProperties) -> 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 TypeMarker for ViewportProperties

type Owned = ViewportProperties

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 ViewportProperties

type Borrowed<'a> = &'a ViewportProperties

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: &<ViewportProperties as TypeMarker>::Owned, ) -> <ViewportProperties as ValueTypeMarker>::Borrowed<'_>

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

impl Persistable for ViewportProperties

impl StructuralPartialEq for ViewportProperties