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use euclid::Size2D;
use crate::{event::Event, unit::Cell, Printer, View as ViewTrait};
pub struct View<V, F> {
inner: V,
f: F,
}
impl<V, F> View<V, F> {
pub fn new<A, B, C>(view: V, f: F) -> Self
where
F: Fn(&Event<A>, B) -> Box<dyn Iterator<Item = C>>,
{
Self {
inner: view,
f,
}
}
}
pub fn new<V, F, A, B, C>(view: V, f: F) -> View<V, F>
where
F: Fn(&Event<A>, B) -> Box<dyn Iterator<Item = C>>,
{
View::new(view, f)
}
impl<T, V, F, M> ViewTrait<T, M> for View<V, F>
where
F: Fn(&Event<T>, bool) -> Box<dyn Iterator<Item = M>>,
V: ViewTrait<T, M>,
{
fn draw(&self, printer: &Printer, focused: bool) {
self.inner.draw(&printer, focused);
}
fn width(&self) -> Size2D<u16, Cell> {
self.inner.width()
}
fn height(&self) -> Size2D<u16, Cell> {
self.inner.height()
}
fn layout(&self, constraint: Size2D<u16, Cell>) -> Size2D<u16, Cell> {
self.inner.layout(constraint)
}
fn event(
&mut self,
event: &Event<T>,
focused: bool,
) -> Box<dyn Iterator<Item = M>> {
(self.f)(event, focused)
}
fn interactive(&self) -> bool {
self.inner.interactive()
}
}
pub trait ViewExt {
fn on_event<F, A, B, C>(self, f: F) -> View<Self, F>
where
Self: Sized,
F: Fn(&Event<A>, B) -> Box<dyn Iterator<Item = C>>,
{
View::new(self, f)
}
}
impl<V> ViewExt for V {}