Struct Ruler 

pub struct Ruler { /* private fields */ }

A horizontal or vertical ruler in the caller’s units. It picks a round step for the scale, so marks never crowd as the zoom changes. Numbers on a vertical ruler stack digit over digit, since text does not rotate.

use ravenrs_widgets::Ruler;

// 2.5 screen pixels per unit, with unit 120 at the start and the pointer at unit 180.
let top = Ruler::horizontal().scale(2.5).origin(120.0).marker(180.0);
let side = Ruler::vertical().scale(2.5).whole_units();

Implementations

impl Ruler

pub fn horizontal() -> Self

A ruler across its parent, with one pixel per unit and zero at the start.

pub fn vertical() -> Self

A ruler down its parent, with one pixel per unit and zero at the top.

pub fn scale(self, pixels_per_unit: f32) -> Self

Logical pixels per unit: the zoom.

pub fn origin(self, units: f32) -> Self

The value in units at the ruler’s start, which panning moves.

pub fn marker(self, units: f32) -> Self

Marks this value in units, such as where the pointer is.

pub fn thickness(self, thickness: f32) -> Self

Thickness in logical pixels (18 by default).

pub fn min_spacing(self, pixels: f32) -> Self

The least distance between numbered marks, in logical pixels (64 by default).

pub fn whole_units(self) -> Self

Never divides below one unit, for what comes in whole pieces, such as pixels.

pub fn label(self, label: impl Into<String>) -> Self

The name screen readers announce, instead of the one in Labels.

Trait Implementations

impl Clone for Ruler

fn clone(&self) -> Ruler

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Ruler

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

Formats the value using the given formatter.

impl View for Ruler

fn build(&self, cx: &mut BuildCx<'_>) -> NodeId

Creates this view’s node for the current build.

fn type_name(&self) -> &'static str

The name the diagnostics panel shows this view’s cost under.