ribir_core 0.4.0-alpha.55

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

/// A simple container widget with a fixed size for its child.
///
/// # Example
///
/// Place text inside a 100x100 container.
///
/// ```rust
/// use ribir::prelude::*;
///
/// container! {
///   size: Size::new(100., 100.),
///   background: Color::BLUE,
///   @Text { text: "Hello" }
/// };
/// ```
#[derive(Declare, SingleChild)]
pub struct Container {
  pub size: Size,
}

impl Render for Container {
  fn perform_layout(&self, clamp: BoxClamp, ctx: &mut LayoutCtx) -> Size {
    let size = clamp.clamp(self.size);
    ctx.perform_single_child_layout(BoxClamp::max_size(size));
    size
  }

  #[inline]
  fn size_affected_by_child(&self) -> bool { false }
}

#[cfg(test)]
mod tests {
  use ribir_dev_helper::*;

  use super::*;
  use crate::test_helper::*;

  const SIZE: Size = Size::new(100., 100.);

  widget_layout_test!(
    smoke,
    WidgetTester::new(fn_widget! { @Container { size: SIZE }}),
    LayoutCase::default().with_size(SIZE)
  );
}