Trait carnelian::scene::facets::Facet

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pub trait Facet {
    // Required methods
    fn update_layers(
        &mut self,
        size: Size,
        layer_group: &mut dyn LayerGroup,
        render_context: &mut RenderContext,
        view_context: &ViewAssistantContext
    ) -> Result<(), Error>;
    fn calculate_size(&self, available: Size) -> Size;

    // Provided methods
    fn associate_facet_id(&mut self, facet_id: FacetId) { ... }
    fn handle_message(&mut self, msg: Box<dyn Any>) { ... }
}

Expand description

The Facet trait is used to create composable units of rendering, sizing and message handling.

Required Methods§

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fn update_layers( &mut self, size: Size, layer_group: &mut dyn LayerGroup, render_context: &mut RenderContext, view_context: &ViewAssistantContext ) -> Result<(), Error>

Called by the scene on facets when it is time for them to update their contents. Facets can add, remove or change layers in the layer group. Those layers will be combined with all the other facet layers in the scene and added to a render composition for display.

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