Struct LazyView

pub struct LazyView<V: View> { /* private fields */ }

A view that lazily renders its contents

Implementations

impl<V: View> LazyView<V>

pub fn new<F: FnOnce() -> V + Send + Sync + 'static>(view_thunk: F) -> Self

Create a new LazyView with function to generate the inner view

pub fn initialize(&mut self)

Manually initialize the inner view

pub fn is_initialized(&self) -> bool

Is the view initialized?

pub fn get_view(&self) -> Option<&V>

Get access to the inner view

Returns None if the inner view isn’t initialized yet

pub fn get_view_mut(&mut self) -> Option<&mut V>

Get mutable access to the inner view

Also initializes the inner view if it hasn’t been done yet

pub fn set_auto_init(&mut self, auto_init: bool)

Should the view be automatically initialized?

pub fn auto_init(self, auto_init: bool) -> Self

Should the view be automatically initialized?

Chainable version

Trait Implementations

impl<V: View> View for LazyView<V>

fn draw(&self, printer: &Printer<'_, '_>)

Draws the view with the given printer (includes bounds) and focus.

fn layout(&mut self, size: Vec2)

Called once the size for this view has been decided.

fn required_size(&mut self, constraint: Vec2) -> Vec2

Returns the minimum size the view requires with the given restrictions.

fn on_event(&mut self, event: Event) -> EventResult

Called when an event is received (key press, mouse event, …).

fn take_focus(&mut self, dir: Direction) -> Result<EventResult, CannotFocus>

Attempt to give this view the focus.

fn call_on_any(&mut self, sel: &Selector<'_>, cb: AnyCb<'_>)

Runs a closure on the view identified by the given selector.

fn focus_view( &mut self, sel: &Selector<'_>, ) -> Result<EventResult, ViewNotFound>

Moves the focus to the view identified by the given selector.

fn needs_relayout(&self) -> bool

Should return true if the view content changed since the last call to layout().

fn important_area(&self, size: Vec2) -> Rect

What part of the view is important and should be visible?

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

Returns the type of this view.