Struct Arrow 

pub struct Arrow {
    pub angle: f64,
    pub length: f64,
    pub ends: ArrowEnds,
    pub kind: ArrowType,
    pub position: f64,
    pub length_per_linewidth: f64,
}

Describes an arrowhead to draw at the end(s) of a line-like geom, following R grid’s arrow(). position and length_per_linewidth are ggplot-rs extensions, not part of grid’s API.

Fields

angle: f64

Half-angle of the arrowhead, in degrees. The full opening angle (between the two wings) is 2 * angle.

length: f64

Wing length in pixels.

ends: ArrowEnds

Which end(s) of the path get a head. Default ArrowEnds::Last.

kind: ArrowType

Open (stroked wings) or closed (filled triangle). Default ArrowType::Open.

position: f64

Where along the path’s arc length the head sits, as a fraction in [0, 1] measured from the path’s start (1.0, the default, is the very end for ArrowEnds::Last, the very start for ArrowEnds::First). Extension: not part of grid’s arrow().

length_per_linewidth: f64

When set above 0, the effective wing length is max(length, length_per_linewidth * linewidth), so arrowheads scale up with a thick line. Extension: not part of grid’s arrow().

Implementations

impl Arrow

pub fn angle(self, degrees: f64) -> Self

Half-angle of the wings, in degrees. Default 30.0.

pub fn length(self, px: f64) -> Self

Wing length in pixels. Default 18.0.

pub fn ends(self, ends: ArrowEnds) -> Self

Which end(s) of the path get a head.

pub fn kind(self, kind: ArrowType) -> Self

Open (stroked wings) or closed (filled triangle).

pub fn closed(self) -> Self

Shorthand for .kind(ArrowType::Closed).

pub fn open(self) -> Self

Shorthand for .kind(ArrowType::Open).

pub fn position(self, fraction: f64) -> Self

Where along the path’s arc length the head sits — see the position field doc.

pub fn length_per_linewidth(self, k: f64) -> Self

Scale the effective wing length with the stroke width — see the length_per_linewidth field doc.

Trait Implementations

impl Clone for Arrow

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Arrow

impl Debug for Arrow

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

Formats the value using the given formatter.

impl Default for Arrow

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Arrow

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Arrow