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use crate::Rectangle;
mod limits;
pub use limits::Limits;
/// The computed bounds of a [`Node`] and its children.
///
/// This type is provided by the GUI runtime to [`Widget::on_event`] and
/// [`Widget::draw`], describing the layout of the [`Node`] produced by
/// [`Widget::node`].
///
/// [`Node`]: struct.Node.html
/// [`Widget::on_event`]: widget/trait.Widget.html#method.on_event
/// [`Widget::draw`]: widget/trait.Widget.html#tymethod.draw
/// [`Widget::node`]: widget/trait.Widget.html#tymethod.node
#[derive(Debug, Clone)]
pub struct Layout {
bounds: Rectangle,
children: Vec<Layout>,
}
impl Layout {
pub fn new(bounds: Rectangle) -> Self {
Layout {
bounds,
children: Vec::new(),
}
}
pub fn push(&mut self, mut child: Layout) {
child.bounds.x += self.bounds.x;
child.bounds.y += self.bounds.y;
self.children.push(child);
}
/// Gets the bounds of the [`Layout`].
///
/// The returned [`Rectangle`] describes the position and size of a
/// [`Node`].
///
/// [`Layout`]: struct.Layout.html
/// [`Rectangle`]: struct.Rectangle.html
/// [`Node`]: struct.Node.html
pub fn bounds(&self) -> Rectangle {
self.bounds
}
/// Returns an iterator over the [`Layout`] of the children of a [`Node`].
///
/// [`Layout`]: struct.Layout.html
/// [`Node`]: struct.Node.html
pub fn children(&self) -> impl Iterator<Item = &Layout> {
self.children.iter()
}
}
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