Struct PathMeasure

pub struct PathMeasure { /* private fields */ }

Available on crate feature v4_14 only.

PathMeasure is an object that allows measurements on Paths such as determining the length of the path.

Many measuring operations require sampling the path length at intermediate points. Therefore, a PathMeasure has a tolerance that determines what precision is required for such approximations.

A PathMeasure struct is a reference counted struct and should be treated as opaque.

GLib type: Shared boxed type with reference counted clone semantics.

Implementations

impl PathMeasure

pub fn as_ptr(&self) -> *mut GskPathMeasure

Return the inner pointer to the underlying C value.

pub unsafe fn from_glib_ptr_borrow(ptr: &*mut GskPathMeasure) -> &Self

Borrows the underlying C value.

impl PathMeasure

pub fn new(path: &Path) -> PathMeasure

Creates a measure object for the given @path with the default tolerance.

path

the path to measure

Returns

a new PathMeasure representing @path

pub fn with_tolerance(path: &Path, tolerance: f32) -> PathMeasure

Creates a measure object for the given @path and @tolerance.

path

the path to measure

tolerance

the tolerance for measuring operations

Returns

a new PathMeasure representing @path

pub fn length(&self) -> f32

Gets the length of the path being measured.

The length is cached, so this function does not do any work.

Returns

The length of the path measured by @self

pub fn path(&self) -> Path

Returns the path that the measure was created for.

Returns

the path of @self

pub fn point(&self, distance: f32) -> Option<PathPoint>

Sets @result to the point at the given distance into the path.

An empty path has no points, so FALSE is returned in that case.

distance

the distance

Returns

TRUE if @result was set

result

return location for the result

pub fn tolerance(&self) -> f32

Returns the tolerance that the measure was created with.

Returns

the tolerance of @self

Trait Implementations

impl Clone for PathMeasure

fn clone(&self) -> Self

Makes a clone of this shared reference.

This increments the strong reference count of the reference. Dropping the reference will decrement it again.

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

Performs copy-assignment from source.

impl Debug for PathMeasure

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

Formats the value using the given formatter.

impl From<PathMeasure> for Value

fn from(s: PathMeasure) -> Self

Converts to this type from the input type.

impl HasParamSpec for PathMeasure

type ParamSpec = ParamSpecBoxed

type SetValue = PathMeasure

Preferred value to be used as setter for the associated ParamSpec.

type BuilderFn = fn(_: &str) -> ParamSpecBoxedBuilder<'_, PathMeasure>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for PathMeasure

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for PathMeasure

fn cmp(&self, other: &PathMeasure) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for PathMeasure

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for PathMeasure

fn partial_cmp(&self, other: &PathMeasure) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for PathMeasure

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for PathMeasure

impl StructuralPartialEq for PathMeasure