Struct Classes 

pub struct Classes(/* private fields */);

Holds a collection of style classes for a styled element.

Similar to CSS, each control may have any number of styling classes applied. Classes whose name starts with : are pseudoclasses and may only be added or removed by the control itself, through IPseudoClasses.

The value is a shared handle: clones refer to the same collection, and handles compare by identity.

Implementations

impl Classes

pub fn new() -> Self

Creates an empty collection.

pub fn from_names<S: Into<String>>(items: impl IntoIterator<Item = S>) -> Self

Creates a collection from the given class names.

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

Whether two handles refer to the same collection.

pub fn parse(s: &str) -> Classes

Parses a space-separated list of class names.

pub fn capacity(&self) -> usize

The number of class names the collection can hold before its storage grows.

pub fn set_capacity(&self, capacity: usize)

Sets the number of class names the collection can hold before its storage grows.

Panics

Panics if capacity is less than the number of class names.

pub fn count(&self) -> usize

The number of classes.

pub fn get(&self, index: usize) -> String

The class at index.

pub fn snapshot(&self) -> Rc<Vec<String>>

A snapshot of the classes.

pub fn contains(&self, name: &str) -> bool

Returns whether a class is present in the collection.

pub fn add_collection_changed( &self, handler: Rc<CollectionChangedHandler<String>>, ) -> u64

Subscribes to collection changes; see FerroList::add_collection_changed.

pub fn remove_collection_changed(&self, token: u64) -> bool

pub fn add(&self, name: &str)

Adds a style class to the collection. Only standard classes may be added via this method.

pub fn add_range<S: AsRef<str>>(&self, names: impl IntoIterator<Item = S>)

Adds style classes to the collection.

pub fn clear(&self)

Removes all non-pseudoclasses from the collection.

pub fn insert(&self, index: usize, name: &str)

Inserts a style class into the collection.

pub fn insert_range<S: AsRef<str>>( &self, index: usize, names: impl IntoIterator<Item = S>, )

Inserts style classes into the collection.

pub fn remove(&self, name: &str) -> bool

Removes a style class from the collection.

pub fn remove_all<S: AsRef<str>>(&self, names: impl IntoIterator<Item = S>)

Removes style classes from the collection.

pub fn remove_at(&self, index: usize)

Removes the style class at the specified index.

pub fn remove_range(&self, index: usize, count: usize)

Removes a range of style classes from the collection.

pub fn replace<S: AsRef<str>>(&self, source: &[S])

Removes all non-pseudoclasses in the collection and adds a new set.

pub fn set(&self, name: &str, value: bool)

Adds or removes a style class.

pub fn add_listener(&self, listener: Rc<dyn Fn()>) -> u64

Registers a listener invoked whenever the classes change. Returns a token for remove_listener.

pub fn remove_listener(&self, token: u64) -> bool

pub fn listener_count(&self) -> usize

The number of registered listeners.

Trait Implementations

impl Clone for Classes

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Classes

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

Formats the value using the given formatter.

impl Default for Classes

fn default() -> Self

Returns the “default value” for a type.

impl IPseudoClasses for Classes

fn add_pseudo(&self, name: &str)

Adds a pseudoclass to the collection.

fn remove_pseudo(&self, name: &str) -> bool

Removes a pseudoclass from the collection.

fn contains(&self, name: &str) -> bool

Returns whether a pseudoclass is present in the collection.

impl MarkupTyped for Classes

const MARKUP: &'static MarkupType

The markup metadata of the type.

impl PartialEq for Classes

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

Equality operator ==.

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

Inequality operator !=.