Struct DrawState 

pub struct DrawState {
    pub cumulative_matrix: [f32; 6],
    /* private fields */
}

Flat draw state tracking clips and transforms. Note: PushLayer and PopLayer commands are intentionally not tracked here; layers are managed outside this struct by the caller.

Fields

cumulative_matrix: [f32; 6]

Implementations

impl DrawState

pub fn new() -> Self

pub fn push_clip(&mut self, rect: Rect) -> Rect

Pushes rect as a clip, intersected with whatever is already clipping, and returns the effective scissor.

A child clip that does not meet its parent clips away to nothing, and that case is worth spelling out because getting it wrong is invisible in every test that does not scroll: intersect answers None for two rects that do not overlap, and falling back to rect there hands the child its own box as the scissor — outside everything that contains it. A widget that emits a clip of its own (an image does, for a Cover overflow or a corner radius) therefore escaped the scroll area it lived in the moment it scrolled out of view: it went on being drawn at its true position, outside the panel, sliding as the content scrolled, and only looked right once its own box fell back inside the viewport. Nothing without a clip of its own could show the bug, which is why the text and boxes beside it in the same list were always clipped correctly.

pub fn pop_clip(&mut self) -> Option<Rect>

pub fn current_clip(&self) -> Option<Rect>

pub fn push_matrix(&mut self, matrix: [f32; 6])

pub fn pop_matrix(&mut self)

pub fn apply_point(&self, x: f32, y: f32) -> (f32, f32)

pub fn reset(&mut self)

Trait Implementations

impl Default for DrawState

fn default() -> Self

Returns the “default value” for a type.