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use std::hash::Hash;
use crate::{Element, Event, Hasher, Layout, Node, Point, Style, 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 node(&self, renderer: &Renderer) -> Node {
let mut children: Vec<Node> = self
.children
.iter()
.map(|child| {
let mut node = child.widget.node(renderer);
let mut style = node.0.style();
style.margin.bottom =
stretch::style::Dimension::Points(f32::from(self.spacing));
node.0.set_style(style);
node
})
.collect();
if let Some(node) = children.last_mut() {
let mut style = node.0.style();
style.margin.bottom = stretch::style::Dimension::Undefined;
node.0.set_style(style);
}
let mut style = Style::default()
.width(self.width)
.height(self.height)
.max_width(self.max_width)
.max_height(self.max_height)
.padding(self.padding)
.align_self(self.align_self)
.align_items(self.align_items)
.justify_content(self.justify_content);
style.0.flex_direction = stretch::style::FlexDirection::Column;
Node::with_children(style, children)
}
fn on_event(
&mut self,
event: Event,
layout: Layout<'_>,
cursor_position: Point,
messages: &mut Vec<Message>,
) {
self.children.iter_mut().zip(layout.children()).for_each(
|(child, layout)| {
child
.widget
.on_event(event, layout, cursor_position, messages)
},
);
}
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_self.hash(state);
self.align_items.hash(state);
self.justify_content.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)
}
}
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