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|
use std::hash::Hash;
use crate::{layout, Element, Event, Hasher, Layout, Length, Point, Widget};
/// A container that distributes its contents vertically.
pub type Column<'a, Message, Renderer> =
iced_core::Column<Element<'a, Message, Renderer>>;
impl<'a, Message, Renderer> Widget<Message, Renderer>
for Column<'a, Message, Renderer>
where
Renderer: self::Renderer,
{
fn width(&self) -> Length {
self.width
}
fn layout(
&self,
renderer: &Renderer,
limits: &layout::Limits,
) -> layout::Node {
let limits = limits
.max_width(self.max_width)
.max_height(self.max_height)
.width(self.width)
.height(self.height);
layout::flex::resolve(
layout::flex::Axis::Vertical,
renderer,
&limits,
self.padding as f32,
self.spacing as f32,
self.align_items,
&self.children,
)
}
fn on_event(
&mut self,
event: Event,
layout: Layout<'_>,
cursor_position: Point,
messages: &mut Vec<Message>,
renderer: &Renderer,
) {
self.children.iter_mut().zip(layout.children()).for_each(
|(child, layout)| {
child.widget.on_event(
event,
layout,
cursor_position,
messages,
renderer,
)
},
);
}
fn draw(
&self,
renderer: &mut Renderer,
layout: Layout<'_>,
cursor_position: Point,
) -> Renderer::Output {
renderer.draw(&self, layout, cursor_position)
}
fn hash_layout(&self, state: &mut Hasher) {
0.hash(state);
self.width.hash(state);
self.height.hash(state);
self.max_width.hash(state);
self.max_height.hash(state);
self.align_items.hash(state);
self.spacing.hash(state);
for child in &self.children {
child.widget.hash_layout(state);
}
}
}
pub trait Renderer: crate::Renderer + Sized {
fn draw<Message>(
&mut self,
row: &Column<'_, Message, Self>,
layout: Layout<'_>,
cursor_position: Point,
) -> Self::Output;
}
impl<'a, Message, Renderer> From<Column<'a, Message, Renderer>>
for Element<'a, Message, Renderer>
where
Renderer: 'a + self::Renderer,
Message: 'static,
{
fn from(
column: Column<'a, Message, Renderer>,
) -> Element<'a, Message, Renderer> {
Element::new(column)
}
}
|
