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|
//! Decorate content and apply alignment.
use crate::{bumpalo, css, Align, Bus, Css, Element, Length, Widget};
/// An element decorating some content.
///
/// It is normally used for alignment purposes.
#[allow(missing_debug_implementations)]
pub struct Container<'a, Message> {
width: Length,
height: Length,
max_width: u32,
max_height: u32,
horizontal_alignment: Align,
vertical_alignment: Align,
content: Element<'a, Message>,
}
impl<'a, Message> Container<'a, Message> {
/// Creates an empty [`Container`].
///
/// [`Container`]: struct.Container.html
pub fn new<T>(content: T) -> Self
where
T: Into<Element<'a, Message>>,
{
use std::u32;
Container {
width: Length::Shrink,
height: Length::Shrink,
max_width: u32::MAX,
max_height: u32::MAX,
horizontal_alignment: Align::Start,
vertical_alignment: Align::Start,
content: content.into(),
}
}
/// Sets the width of the [`Container`].
///
/// [`Container`]: struct.Container.html
pub fn width(mut self, width: Length) -> Self {
self.width = width;
self
}
/// Sets the height of the [`Container`].
///
/// [`Container`]: struct.Container.html
pub fn height(mut self, height: Length) -> Self {
self.height = height;
self
}
/// Sets the maximum width of the [`Container`].
///
/// [`Container`]: struct.Container.html
pub fn max_width(mut self, max_width: u32) -> Self {
self.max_width = max_width;
self
}
/// Sets the maximum height of the [`Container`] in pixels.
///
/// [`Container`]: struct.Container.html
pub fn max_height(mut self, max_height: u32) -> Self {
self.max_height = max_height;
self
}
/// Centers the contents in the horizontal axis of the [`Container`].
///
/// [`Container`]: struct.Container.html
pub fn center_x(mut self) -> Self {
self.horizontal_alignment = Align::Center;
self
}
/// Centers the contents in the vertical axis of the [`Container`].
///
/// [`Container`]: struct.Container.html
pub fn center_y(mut self) -> Self {
self.vertical_alignment = Align::Center;
self
}
}
impl<'a, Message> Widget<Message> for Container<'a, Message>
where
Message: 'static,
{
fn node<'b>(
&self,
bump: &'b bumpalo::Bump,
bus: &Bus<Message>,
style_sheet: &mut Css<'b>,
) -> dodrio::Node<'b> {
use dodrio::builder::*;
let column_class = style_sheet.insert(bump, css::Rule::Column);
let width = css::length(self.width);
let height = css::length(self.height);
let align_items = css::align(self.horizontal_alignment);
let justify_content = css::align(self.vertical_alignment);
let node = div(bump)
.attr(
"class",
bumpalo::format!(in bump, "{}", column_class).into_bump_str(),
)
.attr(
"style",
bumpalo::format!(
in bump,
"width: {}; height: {}; max-width: {}px; align-items: {}; justify-content: {}",
width,
height,
self.max_width,
align_items,
justify_content
)
.into_bump_str(),
)
.children(vec![self.content.node(bump, bus, style_sheet)]);
// TODO: Complete styling
node.finish()
}
}
impl<'a, Message> From<Container<'a, Message>> for Element<'a, Message>
where
Message: 'static,
{
fn from(container: Container<'a, Message>) -> Element<'a, Message> {
Element::new(container)
}
}
|
