Struct unsegen::widget::widget::Demand

pub struct Demand<T: AxisDimension> {
    pub min: PositiveAxisDiff<T>,
    pub max: Option<PositiveAxisDiff<T>>,
    // some fields omitted
}

A one dimensional description of spatial demand of a widget.

A Demand always has a minimum (although it may be zero) and may have a maximum. It is required that the minimum is smaller or equal to the maximum (if present).

Fields

min: PositiveAxisDiff<T>

max: Option<PositiveAxisDiff<T>>

Implementations

impl<T: AxisDimension + PartialOrd + Ord> Demand<T>

pub fn zero() -> Self

A minimum and maximum demand of exactly 0.

pub fn exact<I: Into<PositiveAxisDiff<T>> + Copy>(size: I) -> Self

A minimum and maximum demand of exactly the specified amount.

pub fn at_least<I: Into<PositiveAxisDiff<T>> + Copy>(size: I) -> Self

An specified minimum demand, but no defined maximum.

pub fn from_to<I: Into<PositiveAxisDiff<T>> + Copy>(min: I, max: I) -> Self

A specified range of acceptable values between minimum and maximum.

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

Compute the composed maximum of two Demands. This is especially useful when building tables for example.

Examples:

use unsegen::widget::Demand;
use unsegen::base::*;

let d1 = Demand::<ColDimension>::exact(5);
let d2 = Demand::<ColDimension>::at_least(0);

assert_eq!(d1.max(d2), Demand::<ColDimension>::at_least(5));

pub fn max_assign(&mut self, other: Self)

Replace self with the maximum of self and other (see Demand::max).

Trait Implementations

impl<T: AxisDimension> Add<Demand<T>> for Demand<T>

type Output = Self

The resulting type after applying the + operator.

fn add(self, rhs: Self) -> Self::Output

Performs the + operation.

impl<T: AxisDimension> AddAssign<Demand<T>> for Demand<T>

fn add_assign(&mut self, rhs: Self)

Performs the += operation.

impl<T: Clone + AxisDimension> Clone for Demand<T>

fn clone(&self) -> Demand<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Copy + AxisDimension> Copy for Demand<T>

impl<T: Debug + AxisDimension> Debug for Demand<T>

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

Formats the value using the given formatter.

impl<T: Eq + AxisDimension> Eq for Demand<T>

impl<T: PartialEq + AxisDimension> PartialEq<Demand<T>> for Demand<T>

fn eq(&self, other: &Demand<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Demand<T>) -> bool

This method tests for !=.

impl<T: PartialOrd + AxisDimension> PartialOrd<Demand<T>> for Demand<T>

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

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

fn lt(&self, other: &Demand<T>) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Demand<T>) -> bool

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

fn gt(&self, other: &Demand<T>) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Demand<T>) -> bool

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

impl<T: AxisDimension> StructuralEq for Demand<T>

impl<T: AxisDimension> StructuralPartialEq for Demand<T>

impl<'a, T: AxisDimension + PartialOrd + Ord> Sum<&'a Demand<T>> for Demand<T>

fn sum<I>(iter: I) -> Demand<T> where
    I: Iterator<Item = &'a Demand<T>>, 

Method which takes an iterator and generates Self from the elements by "summing up" the items.

impl<T: AxisDimension + PartialOrd + Ord> Sum<Demand<T>> for Demand<T>

fn sum<I>(iter: I) -> Self where
    I: Iterator<Item = Self>, 

Method which takes an iterator and generates Self from the elements by "summing up" the items.