Struct LifecycleModifier 

pub struct LifecycleModifier {
    pub on_appear: Option<Arc<dyn Fn() + Send + Sync>>,
    pub on_disappear: Option<Arc<dyn Fn() + Send + Sync>>,
}

LifecycleModifier handles on_appear and on_disappear hooks.

Fields

on_appear: Option<Arc<dyn Fn() + Send + Sync>>

on_disappear: Option<Arc<dyn Fn() + Send + Sync>>

Trait Implementations

impl Clone for LifecycleModifier

fn clone(&self) -> LifecycleModifier

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ViewModifier for LifecycleModifier

fn modify<V: View>(self, content: V) -> impl View

fn get_grid_placement(&self) -> Option<GridPlacement>

Returns the grid placement configuration if this modifier defines one.

fn render(&self, _renderer: &mut dyn Renderer, _rect: Rect)

Core rendering hook called before child views.

fn post_render(&self, _renderer: &mut dyn Renderer, _rect: Rect)

Cleanup hook called after child views.

fn render_view<V: View>( &self, view: &V, renderer: &mut dyn Renderer, rect: Rect, )

Allows a modifier to completely override or wrap the rendering of its child. Default implementation performs a standard push -> transform -> render child -> pop sequence.

fn transform_rect(&self, rect: Rect) -> Rect

fn transform_proposal(&self, proposal: SizeProposal) -> SizeProposal

Allows a modifier to transform the layout proposal before it reaches the child.

fn transform_size(&self, size: Size) -> Size

Allows a modifier to transform the resulting size from the child.

fn measure_view<V: View>( &self, view: &V, renderer: &mut dyn Renderer, proposal: SizeProposal, ) -> Size

Measure hook that coordinates size propagation.

fn child_flex_weight<V: View>(&self, view: &V) -> f32

Allows a modifier to override or pass through the child’s flex weight.

fn layout(&self) -> Option<&dyn LayoutView>