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use std::hash::Hash;
use crate::{
Align, Element, Event, Hasher, Justify, Layout, MouseCursor, Node, Point,
Style, Widget,
};
#[derive(Default)]
pub struct Column<'a, Message, Renderer> {
style: Style,
spacing: u16,
children: Vec<Element<'a, Message, Renderer>>,
}
impl<'a, Message, Renderer> std::fmt::Debug for Column<'a, Message, Renderer> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Column")
.field("style", &self.style)
.field("spacing", &self.spacing)
.field("children", &self.children)
.finish()
}
}
impl<'a, Message, Renderer> Column<'a, Message, Renderer> {
pub fn new() -> Self {
let mut style = Style::default().fill_width();
style.0.flex_direction = stretch::style::FlexDirection::Column;
Column {
style,
spacing: 0,
children: Vec::new(),
}
}
pub fn spacing(mut self, px: u16) -> Self {
self.spacing = px;
self
}
pub fn padding(mut self, px: u16) -> Self {
self.style = self.style.padding(px);
self
}
pub fn width(mut self, width: u16) -> Self {
self.style = self.style.width(width);
self
}
pub fn height(mut self, height: u16) -> Self {
self.style = self.style.height(height);
self
}
pub fn max_width(mut self, max_width: u16) -> Self {
self.style = self.style.max_width(max_width);
self
}
pub fn max_height(mut self, max_height: u16) -> Self {
self.style = self.style.max_height(max_height);
self
}
pub fn align_self(mut self, align: Align) -> Self {
self.style = self.style.align_self(align);
self
}
pub fn align_items(mut self, align: Align) -> Self {
self.style = self.style.align_items(align);
self
}
pub fn justify_content(mut self, justify: Justify) -> Self {
self.style = self.style.justify_content(justify);
self
}
pub fn push<E>(mut self, child: E) -> Column<'a, Message, Renderer>
where
E: Into<Element<'a, Message, Renderer>>,
{
self.children.push(child.into());
self
}
}
impl<'a, Message, Renderer> Widget<Message, Renderer>
for Column<'a, Message, 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);
}
Node::with_children(self.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,
) -> MouseCursor {
let mut cursor = MouseCursor::OutOfBounds;
self.children.iter().zip(layout.children()).for_each(
|(child, layout)| {
let new_cursor =
child.widget.draw(renderer, layout, cursor_position);
if new_cursor != MouseCursor::OutOfBounds {
cursor = new_cursor;
}
},
);
cursor
}
fn hash_layout(&self, state: &mut Hasher) {
self.style.hash(state);
self.spacing.hash(state);
for child in &self.children {
child.widget.hash_layout(state);
}
}
}
impl<'a, Message, Renderer> From<Column<'a, Message, Renderer>>
for Element<'a, Message, Renderer>
where
Renderer: 'a,
Message: 'static,
{
fn from(
column: Column<'a, Message, Renderer>,
) -> Element<'a, Message, Renderer> {
Element::new(column)
}
}