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Draft custom layout engine based on druid

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This commit is contained in:
Héctor Ramón Jiménez 2019-11-10 06:05:20 +01:00
parent 2303111e09
commit 0240c3981b
38 changed files with 974 additions and 249 deletions
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33
wgpu/src/renderer/widget/image.rs
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@ -1,18 +1,31 @@
use crate::{Primitive, Renderer};
use iced_native::{image, layout, Image, Layout, MouseCursor, Rectangle};
use iced_native::{image, layout, Image, Layout, Length, MouseCursor, Size};
impl image::Renderer for Renderer {
fn layout(&self, image: &Image, limits: &layout::Limits) -> Layout {
// TODO
Layout::new(Rectangle {
x: 0.0,
y: 0.0,
width: 0.0,
height: 0.0,
})
fn layout(&self, image: &Image, limits: &layout::Limits) -> layout::Node {
let (width, height) = self.image_pipeline.dimensions(&image.path);
let aspect_ratio = width as f32 / height as f32;
// TODO: Deal with additional cases
let (width, height) = match (image.width, image.height) {
(Length::Units(width), _) => (
image.width,
Length::Units((width as f32 / aspect_ratio).round() as u16),
),
(_, _) => {
(Length::Units(width as u16), Length::Units(height as u16))
}
};
let mut size = limits.width(width).height(height).resolve(Size::ZERO);
size.height = size.width / aspect_ratio;
layout::Node::new(size)
}
fn draw(&mut self, image: &Image, layout: &Layout) -> Self::Output {
fn draw(&mut self, image: &Image, layout: Layout<'_>) -> Self::Output {
(
Primitive::Image {
path: image.path.clone(),