Trait Widget

pub trait Widget<S: State> {
    // Required methods
    fn render(
        &mut self,
        scene: &mut Scene,
        theme: &mut dyn Theme,
        info: &AppInfo,
        layout_node: &LayoutNode,
        state: &S,
    );
    fn layout_style(&mut self, state: &S) -> StyleNode;
    fn update(
        &mut self,
        layout: &LayoutNode,
        state: &mut S,
        info: &AppInfo,
    ) -> Update;
    fn widget_id(&self) -> WidgetId;
}

The base trait for all widgets.

Required Methods

fn render( &mut self, scene: &mut Scene, theme: &mut dyn Theme, info: &AppInfo, layout_node: &LayoutNode, state: &S, )

Render the widget to the canvas.

fn layout_style(&mut self, state: &S) -> StyleNode

Return the layout style node for layout computation.

fn update( &mut self, layout: &LayoutNode, state: &mut S, info: &AppInfo, ) -> Update

Update the widget state with given info and layout. Returns if the app should be updated.

fn widget_id(&self) -> WidgetId

Return the widget id.

Implementors

impl<S: State, C: Component<S>> Widget<S> for ComponentAdapter<S, C>