Struct BoxConstraints 

pub struct BoxConstraints {
    pub min_width: f64,
    pub max_width: f64,
    pub min_height: f64,
    pub max_height: f64,
}

Immutable layout constraints for RenderBox layout.

A Size respects a BoxConstraints if, and only if, all of the following relations hold:

• min_width <= Size::width <= max_width
• min_height <= Size::height <= max_height

Fields

min_width: f64

The minimum width that satisfies the constraints.

max_width: f64

The maximum width that satisfies the constraints.

Might be f64::INFINITY.

min_height: f64

The minimum height that satisfies the constraints.

max_height: f64

The maximum height that satisfies the constraints.

Might be f64::INFINITY.

Implementations

impl BoxConstraints

pub const fn new() -> BoxConstraints

Creates box constraints with the given constraints.

pub const fn min_width(self, value: f64) -> BoxConstraints

Sets min_width.

pub const fn max_width(self, value: f64) -> BoxConstraints

Sets max_width.

pub const fn min_height(self, value: f64) -> BoxConstraints

Sets min_height.

pub const fn max_height(self, value: f64) -> BoxConstraints

Sets max_height.

pub fn tight(size: Size) -> BoxConstraints

Creates box constraints that is respected only by the given size.

pub const fn tight_for( width: Option<f64>, height: Option<f64>, ) -> BoxConstraints

Creates box constraints that require the given width or height.

pub const fn tight_for_finite(width: f64, height: f64) -> BoxConstraints

Creates box constraints that require the given width or height, except if they are infinite.

pub fn loose(size: Size) -> BoxConstraints

Creates box constraints that forbid sizes larger than the given size.

pub const fn expand(width: Option<f64>, height: Option<f64>) -> BoxConstraints

Creates box constraints that expand to fill another box constraints.

pub const fn from_view_constraints( constraints: ViewConstraints, ) -> BoxConstraints

Creates box constraints that match the given view constraints.

pub const fn copy_with(self) -> BoxConstraints

Creates a copy of this box constraints. Chain field replacements.

pub fn deflate(self, edges: EdgeInsetsGeometry) -> BoxConstraints

Returns new box constraints that are smaller by the given edge dimensions.

pub fn loosen(self) -> BoxConstraints

Returns new box constraints that remove the minimum width and height requirements.

pub fn enforce(self, constraints: BoxConstraints) -> BoxConstraints

Returns new box constraints that respect the given constraints while being as close as possible to the original constraints.

pub fn tighten(self, width: Option<f64>, height: Option<f64>) -> BoxConstraints

Returns new box constraints with a tight width and/or height as close to the given width and height as possible while still respecting the original box constraints.

pub const fn flipped(self) -> BoxConstraints

A box constraints with the width and height constraints flipped.

pub const fn width_constraints(self) -> BoxConstraints

Returns box constraints with the same width constraints but with unconstrained height.

pub const fn height_constraints(self) -> BoxConstraints

Returns box constraints with the same height constraints but with unconstrained width.

pub fn constrain_width(self, width: f64) -> f64

Returns the width that both satisfies the constraints and is as close as possible to the given width.

pub fn constrain_height(self, height: f64) -> f64

Returns the height that both satisfies the constraints and is as close as possible to the given height.

pub fn constrain(self, size: Size) -> Size

Returns the size that both satisfies the constraints and is as close as possible to the given size.

pub fn constrain_dimensions(self, width: f64, height: f64) -> Size

Returns the size that both satisfies the constraints and is as close as possible to the given width and height.

pub fn constrain_size_and_attempt_to_preserve_aspect_ratio( self, size: Size, ) -> Size

Returns a size that attempts to meet the following conditions, in order:

• The size must satisfy these constraints.
• The aspect ratio of the returned size matches the aspect ratio of the given size.
• The returned size is as big as possible while still being equal to or smaller than the given size.

pub fn biggest(self) -> Size

The biggest size that satisfies the constraints.

pub fn smallest(self) -> Size

The smallest size that satisfies the constraints.

pub fn has_tight_width(self) -> bool

Whether there is exactly one width value that satisfies the constraints.

pub fn has_tight_height(self) -> bool

Whether there is exactly one height value that satisfies the constraints.

pub fn has_bounded_width(self) -> bool

Whether there is an upper bound on the maximum width.

pub fn has_bounded_height(self) -> bool

Whether there is an upper bound on the maximum height.

pub fn has_infinite_width(self) -> bool

Whether the width constraint is infinite.

pub fn has_infinite_height(self) -> bool

Whether the height constraint is infinite.

pub fn is_satisfied_by(self, size: Size) -> bool

Whether the given size satisfies the constraints.

pub fn truncating_div(self, factor: f64) -> BoxConstraints

Scales each constraint parameter by the inverse of the given factor, rounded toward zero (Dart ~/).

pub fn lerp( a: Option<BoxConstraints>, b: Option<BoxConstraints>, t: f64, ) -> Option<BoxConstraints>

Linearly interpolate between two box constraints.

If either is none, this function interpolates from a BoxConstraints object whose fields are all set to 0.0.

pub fn normalize(self) -> BoxConstraints

Returns a box constraints that is_normalized.

Trait Implementations

impl Clone for BoxConstraints

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Constraints for BoxConstraints

fn is_tight(&self) -> bool

Whether there is exactly one size possible given these constraints.

fn is_normalized(&self) -> bool

Whether the constraint is expressed in a consistent manner.

fn debug_assert_is_valid(&self, is_applied_constraint: bool) -> bool

Asserts that the constraints are valid.

impl Copy for BoxConstraints

impl Debug for BoxConstraints

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

Formats the value using the given formatter.

impl Default for BoxConstraints

fn default() -> BoxConstraints

Returns the “default value” for a type.

impl Display for BoxConstraints

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

Formats the value using the given formatter.

impl Div<f64> for BoxConstraints

type Output = BoxConstraints

The resulting type after applying the / operator.

fn div(self, factor: f64) -> BoxConstraints

Performs the / operation.

impl Eq for BoxConstraints

impl Hash for BoxConstraints

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 Mul<f64> for BoxConstraints

type Output = BoxConstraints

The resulting type after applying the * operator.

fn mul(self, factor: f64) -> BoxConstraints

Performs the * operation.

impl PartialEq for BoxConstraints

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

Equality operator ==.

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

Inequality operator !=.

impl Rem<f64> for BoxConstraints

type Output = BoxConstraints

The resulting type after applying the % operator.

fn rem(self, value: f64) -> BoxConstraints

Performs the % operation.