Struct Empty 

pub struct Empty { /* private fields */ }

An empty View.

This view can still have a size, background, border radius, and outline. It can be used as a simple placeholder view when another view requires a child element but there is no meaningful child element to be provided.

Implementations

impl Empty

pub fn new() -> Self

Creates a new empty view.

Example

use floem::views::Empty;

let placeholder = Empty::new();

pub fn with_id(id: ViewId) -> Self

Creates a new empty view with a pre-existing ViewId.

This is useful for lazy view construction where the ViewId is created before the view itself.

Trait Implementations

impl Default for Empty

fn default() -> Self

Returns the “default value” for a type.

impl View for Empty

fn id(&self) -> ViewId

fn view_style(&self) -> Option<Style>

fn view_class(&self) -> Option<StyleClassRef>

fn debug_name(&self) -> Cow<'static, str>

fn update(&mut self, cx: &mut UpdateCx<'_>, state: Box<dyn Any>)

Use this method to react to changes in view-related state. You will usually send state to this hook manually using the View’s Id handle

fn style_pass(&mut self, cx: &mut StyleCx<'_>)

Use this method to style the view’s children.

fn layout(&mut self, cx: &mut LayoutCx<'_>) -> NodeId

Use this method to layout the view’s children. Usually you’ll do this by calling LayoutCx::layout_node.

fn compute_layout(&mut self, cx: &mut ComputeLayoutCx<'_>) -> Option<Rect>

Responsible for computing the layout of the view’s children.

fn event_before_children( &mut self, cx: &mut EventCx<'_>, event: &Event, ) -> EventPropagation

fn event_after_children( &mut self, cx: &mut EventCx<'_>, event: &Event, ) -> EventPropagation

fn paint(&mut self, cx: &mut PaintCx<'_>)

View-specific implementation. Will be called in PaintCx::paint_view. Usually you’ll call paint_view for every child view. But you might also draw text, adjust the offset, clip or draw text.

fn scroll_to( &mut self, cx: &mut WindowState, target: ViewId, rect: Option<Rect>, ) -> bool

Scrolls the view and all direct and indirect children to bring the target view to be visible. Returns true if this view contains or is the target.