1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
use crate::{Backend, Defaults, Primitive};
use iced_native::layout;
use iced_native::{Element, Rectangle};
/// A backend-agnostic renderer that supports all the built-in widgets.
#[derive(Debug)]
pub struct Renderer<B: Backend> {
backend: B,
primitive: Primitive,
}
impl<B: Backend> Renderer<B> {
/// Creates a new [`Renderer`] from the given [`Backend`].
pub fn new(backend: B) -> Self {
Self {
backend,
primitive: Primitive::None,
}
}
pub fn backend(&self) -> &B {
&self.backend
}
pub fn present(&mut self, f: impl FnOnce(&mut B, &Primitive)) {
f(&mut self.backend, &self.primitive);
}
}
impl<B> iced_native::Renderer for Renderer<B>
where
B: Backend,
{
type Defaults = Defaults;
fn layout<'a, Message>(
&mut self,
element: &Element<'a, Message, Self>,
limits: &layout::Limits,
) -> layout::Node {
let layout = element.layout(self, limits);
self.backend.trim_measurements();
layout
}
fn with_layer(&mut self, _bounds: Rectangle, _f: impl FnOnce(&mut Self)) {}
}
|
