ribir_core 0.4.0-alpha.56

A non-intrusive declarative GUI framework, to build modern native/wasm cross-platform applications.
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use crate::prelude::*;

/// A widget that represents an empty node in the widget tree.
///
/// This widget is used when you need a placeholder widget that doesn't render
/// anything and doesn't accept children. It's useful for conditional rendering
/// or as a neutral widget in compositions.
///
/// # Example
///
/// ```rust no_run
/// use ribir::prelude::*;
///
/// fn_widget! {
///   @Void {}
/// };
/// ```
#[declare]
pub struct Void;

impl Render for Void {
  fn measure(&self, clamp: BoxClamp, _: &mut MeasureCtx) -> Size { clamp.min }

  fn paint(&self, _: &mut PaintingCtx) {}

  #[cfg(feature = "debug")]
  fn debug_name(&self) -> std::borrow::Cow<'static, str> { std::borrow::Cow::Borrowed("void") }
}