Trait Operation

pub trait Operation<T = ()>: Send {
    // Required method
    fn container(
        &mut self,
        id: Option<&Id>,
        bounds: Rectangle,
        operate_on_children: &mut dyn FnMut(&mut dyn Operation<T>),
    );

    // Provided methods
    fn focusable(
        &mut self,
        _id: Option<&Id>,
        _bounds: Rectangle,
        _state: &mut dyn Focusable,
    ) { ... }
    fn scrollable(
        &mut self,
        _id: Option<&Id>,
        _bounds: Rectangle,
        _content_bounds: Rectangle,
        _translation: Vector,
        _state: &mut dyn Scrollable,
    ) { ... }
    fn text_input(
        &mut self,
        _id: Option<&Id>,
        _bounds: Rectangle,
        _state: &mut dyn TextInput,
    ) { ... }
    fn text(&mut self, _id: Option<&Id>, _bounds: Rectangle, _text: &str) { ... }
    fn custom(
        &mut self,
        _id: Option<&Id>,
        _bounds: Rectangle,
        _state: &mut (dyn Any + 'static),
    ) { ... }
    fn finish(&self) -> Outcome<T> { ... }
}

Available on crate feature advanced only.

A piece of logic that can traverse the widget tree of an application in order to query or update some widget state.

Required Methods

fn container( &mut self, id: Option<&Id>, bounds: Rectangle, operate_on_children: &mut dyn FnMut(&mut dyn Operation<T>), )

Operates on a widget that contains other widgets.

The operate_on_children function can be called to return control to the widget tree and keep traversing it.

Provided Methods

fn focusable( &mut self, _id: Option<&Id>, _bounds: Rectangle, _state: &mut dyn Focusable, )

Operates on a widget that can be focused.

fn scrollable( &mut self, _id: Option<&Id>, _bounds: Rectangle, _content_bounds: Rectangle, _translation: Vector, _state: &mut dyn Scrollable, )

Operates on a widget that can be scrolled.

fn text_input( &mut self, _id: Option<&Id>, _bounds: Rectangle, _state: &mut dyn TextInput, )

Operates on a widget that has text input.

fn text(&mut self, _id: Option<&Id>, _bounds: Rectangle, _text: &str)

Operates on a widget that contains some text.

fn custom( &mut self, _id: Option<&Id>, _bounds: Rectangle, _state: &mut (dyn Any + 'static), )

Operates on a custom widget with some state.

fn finish(&self) -> Outcome<T>

Finishes the Operation and returns its Outcome.

Implementations on Foreign Types

impl<T, O> Operation<O> for Box<T>

where T: Operation<O> + ?Sized,

fn container( &mut self, id: Option<&Id>, bounds: Rectangle, operate_on_children: &mut dyn FnMut(&mut dyn Operation<O>), )

fn focusable( &mut self, id: Option<&Id>, bounds: Rectangle, state: &mut dyn Focusable, )

fn scrollable( &mut self, id: Option<&Id>, bounds: Rectangle, content_bounds: Rectangle, translation: Vector, state: &mut dyn Scrollable, )

fn text_input( &mut self, id: Option<&Id>, bounds: Rectangle, state: &mut dyn TextInput, )

fn text(&mut self, id: Option<&Id>, bounds: Rectangle, text: &str)

fn custom( &mut self, id: Option<&Id>, bounds: Rectangle, state: &mut (dyn Any + 'static), )

fn finish(&self) -> Outcome<O>

Implementors