Struct RadioButton

pub struct RadioButton<A> { /* private fields */ }

A radio button with label

See also RadioBox which excludes the label.

Implementations

impl<A> RadioButton<A>

pub fn new( label: impl Into<AccessString>, state_fn: impl Fn(&ConfigCx<'_>, &A) -> bool + 'static, ) -> Self

Construct a radio button with the given label

• label is displayed to the left or right (according to text direction)
• state_fn extracts the current state from input data

pub fn with(self, f: impl Fn(&mut EventCx<'_>, &A) + 'static) -> Self

Call the handler f on selection

No handler is called on deselection.

pub fn new_msg<M: Debug + 'static>( label: impl Into<AccessString>, state_fn: impl Fn(&ConfigCx<'_>, &A) -> bool + 'static, msg_fn: impl Fn() -> M + 'static, ) -> Self

Construct a radio button

• label is displayed to the left or right (according to text direction)
• state_fn extracts the current state from input data
• A message generated by msg_fn is emitted when selected

pub fn new_value(label: impl Into<AccessString>, value: A) -> Self

where A: Clone + Debug + Eq + 'static,

Construct a radio button

This radio button expects data of type A and will appear set when input data == value. Additionally, on selection, it will emit a copy of value as a message.

Trait Implementations

impl<A> Events for RadioButton<A>

fn handle_messages(&mut self, cx: &mut EventCx<'_>, data: &Self::Data)

Handler for messages from children/descendants

fn handle_event( &mut self, _: &mut EventCx<'_>, _: &Self::Data, _: Event, ) -> IsUsed

Handle an Event

fn make_child_id(&mut self, index: usize) -> Id

Make an identifier for a child

fn configure(&mut self, cx: &mut ConfigCx<'_>)

Configure self

fn configure_recurse(&mut self, cx: &mut ConfigCx<'_>, data: &Self::Data)

Configure children

fn update(&mut self, cx: &mut ConfigCx<'_>, data: &Self::Data)

Update self using input data

fn update_recurse(&mut self, cx: &mut ConfigCx<'_>, data: &Self::Data)

Update children

fn navigable(&self) -> bool

Is this widget navigable via Tab key?

fn handle_hover(&mut self, cx: &mut EventCx<'_>, state: bool)

Mouse focus handler

fn handle_scroll( &mut self, cx: &mut EventCx<'_>, data: &Self::Data, scroll: Scroll, )

Handler for scrolling

impl<A> Layout for RadioButton<A>

fn set_rect(&mut self, cx: &mut ConfigCx<'_>, rect: Rect, hints: AlignHints)

Set size and position

fn find_id(&mut self, coord: Coord) -> Option<Id>

Translate a coordinate to an Id

fn as_layout(&self) -> &dyn Layout

Get as a dyn Layout

fn id_ref(&self) -> &Id

Get the widget’s identifier

fn rect(&self) -> Rect

Get the widget’s region, relative to its parent.

fn widget_name(&self) -> &'static str

Get the name of the widget struct

fn num_children(&self) -> usize

Get the number of child widgets

fn get_child(&self, index: usize) -> Option<&dyn Layout>

Access a child as a dyn Layout

fn size_rules(&mut self, sizer: SizeCx<'_>, axis: AxisInfo) -> SizeRules

Get size rules for the given axis

fn nav_next(&self, reverse: bool, from: Option<usize>) -> Option<usize>

Navigation in spatial order

fn draw(&mut self, draw: DrawCx<'_>)

Draw a widget and its children

fn find_child_index(&self, id: &Id) -> Option<usize>

Find the child which is an ancestor of this id, if any

fn translation(&self) -> Offset

Get translation of children relative to this widget

impl<A> LayoutVisitor for RadioButton<A>

fn layout_visitor(&mut self) -> Visitor<impl Visitable>

Layout defined by a Visitor

impl<A> Widget for RadioButton<A>

type Data = A

Input data type

fn as_node<'a>(&'a mut self, data: &'a Self::Data) -> Node<'a>

Erase type

fn for_child_node( &mut self, data: &Self::Data, index: usize, closure: Box<dyn FnOnce(Node<'_>) + '_>, )

Call closure on child with given index, if index < self.num_children().