unspeaker/tengri
1
0
Fork 0
mirror of https://codeberg.org/unspeaker/tengri.git synced 2026-07-17 15:56:57 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

fix Size, begin fixing View

Browse source
This commit is contained in:
i do not exist 2026-04-13 17:30:43 +03:00
parent a06ea2ac13
commit a93fe92a59
3 changed files with 38 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

30
src/draw.rs
View file

@ -1,5 +1,17 @@
use crate::{*, lang::*, color::*, space::*};
/// Emit a [Draw]able.
///
/// Speculative. How to avoid conflicts with [Draw] proper?
pub trait View<T: Screen> {
fn view (&self) -> impl Draw<T>;
}
impl<T: Screen, V: View<T>> Draw<T> for &V {
fn draw (self, to: &mut T) -> Usually<XYWH<T::Unit>> {
self.view().draw(to)
}
}
/// Drawable that supports dynamic dispatch.
///
/// Drawables are composable, e.g. the [when] and [either] conditionals
@ -7,6 +19,10 @@ use crate::{*, lang::*, color::*, space::*};
///
/// Drawables are consumable, i.e. the [Draw::draw] method receives an
/// owned `self` and does not return it, consuming the drawable.
///
/// To draw a thing multiple times, instead of explicitly constructing it
/// every time, implement the [View] trait instead, which will construct
/// a [Draw]able.
///
/// ```
/// use tengri::draw::*;
@ -26,13 +42,12 @@ use crate::{*, lang::*, color::*, space::*};
pub trait Draw<T: Screen> {
fn draw (self, to: &mut T) -> Usually<XYWH<T::Unit>>;
}
/// Empty draw
impl<T: Screen> Draw<T> for () {
fn draw (self, __: &mut T) -> Usually<XYWH<T::Unit>> {
Ok(Default::default())
}
}
impl<T: Screen, D: Draw<T>> Draw<T> for Option<D> {
fn draw (self, to: &mut T) -> Usually<XYWH<T::Unit>> {
Ok(self.map(|draw|draw.draw(to)).transpose()?.unwrap_or_default())
@ -111,14 +126,3 @@ pub trait Screen: Space<Self::Unit> + Send + Sync + Sized {
unimplemented!()
}
}
/// Emit a [Draw]able.
pub trait View<T: Screen> {
fn view (&self) -> impl Draw<T>;
}
impl<T: Screen, V: View<T>> Draw<T> for &V {
fn draw (self, to: &mut T) -> Usually<XYWH<T::Unit>> {
self.view().draw(to)
}
}