Struct PaintCtx 

pub struct PaintCtx<'a> {
    pub theme: &'a Theme,
    pub text: &'a mut TextEngine,
    pub bounds: Rect,
    pub state: VisualState,
    pub now_ms: u64,
}

What a widget needs in order to draw itself.

Mutable, because PaintCtx::text is: measuring a string is what fills the glyph cache, so a widget that measures and then draws rasterises each glyph once rather than twice. The widget itself is still &self.

Fields

theme: &'a Theme

The active theme. Widgets name roles, never colours.

text: &'a mut TextEngine

Fonts and the glyph cache.

bounds: Rect

Absolute bounds of this widget, in surface pixels.

state: VisualState

Hover, press, focus and enabled state, tracked by the tree.

now_ms: u64

Milliseconds from an arbitrary epoch, as last given to crate::Ui::tick.

Trait Implementations

impl<'a> Debug for PaintCtx<'a>

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

Formats the value using the given formatter.