Trait Measure

Source

pub trait Measure {
    // Required method
    fn height_for(&self, width: u16) -> u16;
}

Expand description

A widget that can report the height it needs for a given width, before ever being rendered.

Lets a caller size a pane to fit content (e.g. a wrapped Paragraph) instead of guessing a fixed height up front. Sizing is pure content math, not drawing.

§Examples

use retroglyph_ui::Measure;

struct FixedHeight(u16);

impl Measure for FixedHeight {
    fn height_for(&self, _width: u16) -> u16 {
        self.0
    }
}

assert_eq!(FixedHeight(3).height_for(80), 3);