Struct VirtualViewport

pub struct VirtualViewport {
    pub rect: Rect,
    pub overscan: f32,
}

Viewport made available to widgets whose content is larger than the visible scroll container. Coordinates are local to the content.

Values use logical pixels and are stored verbatim. In particular, negative or non-finite overscan is not clamped here; consumers must define how such values affect virtualization.

Examples

use ailloli_ui_core::Rect;
use ailloli_ui_runtime::layout::VirtualViewport;

let viewport = VirtualViewport::new(Rect::new(0.0, 120.0, 640.0, 480.0), 32.0);
assert_eq!(viewport.overscan, 32.0);

Fields

rect: Rect

Visible rectangle in content-local logical pixels.

overscan: f32

Extra logical pixels requested around every visible edge.

Implementations

impl VirtualViewport

Provides the operations defined for VirtualViewport.

pub const fn new(rect: Rect, overscan: f32) -> Self

Creates a viewport without validating its rectangle or overscan.

Examples

use ailloli_ui_core::Rect;
use ailloli_ui_runtime::layout::VirtualViewport;

let viewport = VirtualViewport::new(Rect::new(10.0, 20.0, 30.0, 40.0), 8.0);
assert_eq!(viewport.rect.y, 20.0);

Trait Implementations

impl Clone for VirtualViewport

fn clone(&self) -> VirtualViewport

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for VirtualViewport

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

Formats the value using the given formatter.

impl PartialEq for VirtualViewport

fn eq(&self, other: &VirtualViewport) -> 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 Copy for VirtualViewport

impl StructuralPartialEq for VirtualViewport