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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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32
native/src/widget/scrollable.rs
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@ -1,11 +1,13 @@
use crate::{
column,
input::{mouse, ButtonState},
layout, Element, Event, Hasher, Layout, Point, Rectangle, Widget,
layout, Element, Event, Hasher, Layout, Length, Point, Rectangle, Size,
Widget,
};
pub use iced_core::scrollable::State;
use std::f32;
use std::hash::Hash;
/// A scrollable [`Column`].
@ -19,15 +21,31 @@ impl<'a, Message, Renderer> Widget<Message, Renderer>
where
Renderer: self::Renderer + column::Renderer,
{
fn layout(&self, renderer: &Renderer, limits: &layout::Limits) -> Layout {
// TODO
self.content.layout(renderer, limits)
fn layout(
&self,
renderer: &Renderer,
limits: &layout::Limits,
) -> layout::Node {
let limits = limits
.max_height(self.max_height)
.width(Length::Fill)
.height(self.height);
let child_limits = layout::Limits::new(
Size::new(limits.min().width, 0.0),
Size::new(limits.max().width, f32::INFINITY),
);
let content = self.content.layout(renderer, &child_limits);
let size = limits.resolve(content.size());
layout::Node::with_children(size, vec![content])
}
fn on_event(
&mut self,
event: Event,
layout: &Layout,
layout: Layout<'_>,
cursor_position: Point,
messages: &mut Vec<Message>,
renderer: &Renderer,
@ -130,7 +148,7 @@ where
fn draw(
&self,
renderer: &mut Renderer,
layout: &Layout,
layout: Layout<'_>,
cursor_position: Point,
) -> Renderer::Output {
let bounds = layout.bounds();
@ -168,7 +186,7 @@ pub trait Renderer: crate::Renderer + Sized {
&mut self,
scrollable: &Scrollable<'_, Message, Self>,
bounds: Rectangle,
content_layout: &Layout,
content_layout: Layout<'_>,
cursor_position: Point,
) -> Self::Output;
}