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RenderAnimatedOpacityMixin

inset_rendering

Trait RenderAnimatedOpacityMixin 

Source 
pub trait RenderAnimatedOpacityMixin: RenderObjectWithChildMixin<ChildType = AnyRenderBox> + RenderBox {
    // Required methods
    fn animated_opacity_data(
        self: RenderHandle<Self>,
        app: &App,
    ) -> &RenderAnimatedOpacityData;
    fn animated_opacity_data_mut(
        self: RenderHandle<Self>,
        app: &mut App,
    ) -> &mut RenderAnimatedOpacityData;

    // Provided methods
    fn is_repaint_boundary(self: RenderHandle<Self>, app: &App) -> bool { ... }
    fn update_composited_layer(
        self: RenderHandle<Self>,
        app: &mut App,
        old_layer: Option<AnyOffsetLayer>,
    ) -> AnyOffsetLayer { ... }
    fn opacity(self: RenderHandle<Self>, app: &App) -> AnyAnimation<f64> { ... }
    fn set_opacity(
        self: RenderHandle<Self>,
        app: &mut App,
        value: AnyAnimation<f64>,
    ) { ... }
    fn did_attach(self: RenderHandle<Self>, app: &mut App) { ... }
    fn did_detach(self: RenderHandle<Self>, app: &mut App) { ... }
    fn opacity_listener(self: RenderHandle<Self>) -> Listener { ... }
    fn update_opacity(self: RenderHandle<Self>, app: &mut App) { ... }
    fn paint(
        self: RenderHandle<Self>,
        app: &mut App,
        context: &mut PaintingContext,
        offset: Offset,
    )
       where Self: RenderProxyBoxMixin { ... }
}
Expand description

Implementation of RenderAnimatedOpacity and RenderSliverAnimatedOpacity.

This mixin allows the logic of animating opacity to be used with different layout models, e.g. the way that RenderAnimatedOpacity uses it for RenderBox and RenderSliverAnimatedOpacity uses it for RenderSliver.

The host wires the virtuals: is_repaint_boundary, update_composited_layer, did_attach, did_detach, and paint call the same-named functions here.

Required Methods§

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fn animated_opacity_data( self: RenderHandle<Self>, app: &App, ) -> &RenderAnimatedOpacityData

Mixin field access.

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fn animated_opacity_data_mut( self: RenderHandle<Self>, app: &mut App, ) -> &mut RenderAnimatedOpacityData

See animated_opacity_data.

Provided Methods§

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fn is_repaint_boundary(self: RenderHandle<Self>, app: &App) -> bool

Flutter’s isRepaintBoundary.

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fn update_composited_layer( self: RenderHandle<Self>, app: &mut App, old_layer: Option<AnyOffsetLayer>, ) -> AnyOffsetLayer

Flutter’s updateCompositedLayer.

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fn opacity(self: RenderHandle<Self>, app: &App) -> AnyAnimation<f64>

The animation that drives this render object’s opacity.

An opacity of 1.0 is fully opaque. An opacity of 0.0 is fully transparent (i.e., invisible).

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fn set_opacity( self: RenderHandle<Self>, app: &mut App, value: AnyAnimation<f64>, )

Sets opacity.

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fn did_attach(self: RenderHandle<Self>, app: &mut App)

Flutter’s attach after super.attach(owner).

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fn did_detach(self: RenderHandle<Self>, app: &mut App)

Flutter’s detach before super.detach().

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fn opacity_listener(self: RenderHandle<Self>) -> Listener

The _updateOpacity tear-off, equal to itself across registrations.

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fn update_opacity(self: RenderHandle<Self>, app: &mut App)

Flutter’s _updateOpacity.

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fn paint( self: RenderHandle<Self>, app: &mut App, context: &mut PaintingContext, offset: Offset, )
where Self: RenderProxyBoxMixin,

Flutter’s paint: nothing when fully transparent, else the proxy paint.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§