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use super::*;
/// A node that places a rectangular filled background behind its child.
#[derive(Debug, Clone, PartialEq, Hash)]
pub struct BackgroundNode {
/// The kind of shape to use as a background.
pub shape: BackgroundShape,
/// The background fill.
pub fill: Fill,
/// The child node to be filled.
pub child: AnyNode,
}
/// The kind of shape to use as a background.
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum BackgroundShape {
Rect,
Ellipse,
}
impl Layout for BackgroundNode {
fn layout(&self, ctx: &mut LayoutContext, regions: &Regions) -> Vec<Frame> {
let mut frames = self.child.layout(ctx, regions);
for frame in &mut frames {
let (point, shape) = match self.shape {
BackgroundShape::Rect => (Point::zero(), Shape::Rect(frame.size)),
BackgroundShape::Ellipse => {
(frame.size.to_point() / 2.0, Shape::Ellipse(frame.size))
}
};
let element = Element::Geometry(shape, self.fill);
frame.elements.insert(0, (point, element));
}
frames
}
}
impl From<BackgroundNode> for AnyNode {
fn from(background: BackgroundNode) -> Self {
Self::new(background)
}
}
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