use crate::event::{self, Event};
use crate::layout::{self, Layout};
use crate::mouse;
use crate::overlay;
use crate::renderer;
use crate::widget::{Operation, Tree};
use crate::{
Alignment, Clipboard, Element, Length, Padding, Pixels, Point, Rectangle,
Shell, Widget,
};
#[allow(missing_debug_implementations)]
pub struct Row<'a, Message, Renderer> {
spacing: f32,
padding: Padding,
width: Length,
height: Length,
align_items: Alignment,
children: Vec<Element<'a, Message, Renderer>>,
}
impl<'a, Message, Renderer> Row<'a, Message, Renderer> {
pub fn new() -> Self {
Self::with_children(Vec::new())
}
pub fn with_children(
children: Vec<Element<'a, Message, Renderer>>,
) -> Self {
Row {
spacing: 0.0,
padding: Padding::ZERO,
width: Length::Shrink,
height: Length::Shrink,
align_items: Alignment::Start,
children,
}
}
pub fn spacing(mut self, amount: impl Into<Pixels>) -> Self {
self.spacing = amount.into().0;
self
}
pub fn padding<P: Into<Padding>>(mut self, padding: P) -> Self {
self.padding = padding.into();
self
}
pub fn width(mut self, width: impl Into<Length>) -> Self {
self.width = width.into();
self
}
pub fn height(mut self, height: impl Into<Length>) -> Self {
self.height = height.into();
self
}
pub fn align_items(mut self, align: Alignment) -> Self {
self.align_items = align;
self
}
pub fn push(
mut self,
child: impl Into<Element<'a, Message, Renderer>>,
) -> Self {
self.children.push(child.into());
self
}
}
impl<'a, Message, Renderer> Default for Row<'a, Message, Renderer> {
fn default() -> Self {
Self::new()
}
}
impl<'a, Message, Renderer> Widget<Message, Renderer>
for Row<'a, Message, Renderer>
where
Renderer: crate::Renderer,
{
fn children(&self) -> Vec<Tree> {
self.children.iter().map(Tree::new).collect()
}
fn diff(&self, tree: &mut Tree) {
tree.diff_children(&self.children)
}
fn width(&self) -> Length {
self.width
}
fn height(&self) -> Length {
self.height
}
fn layout(
&self,
renderer: &Renderer,
limits: &layout::Limits,
) -> layout::Node {
let limits = limits.width(self.width).height(self.height);
layout::flex::resolve(
layout::flex::Axis::Horizontal,
renderer,
&limits,
self.padding,
self.spacing,
self.align_items,
&self.children,
)
}
fn operate(
&self,
tree: &mut Tree,
layout: Layout<'_>,
renderer: &Renderer,
operation: &mut dyn Operation<Message>,
) {
operation.container(None, &mut |operation| {
self.children
.iter()
.zip(&mut tree.children)
.zip(layout.children())
.for_each(|((child, state), layout)| {
child
.as_widget()
.operate(state, layout, renderer, operation);
})
});
}
fn on_event(
&mut self,
tree: &mut Tree,
event: Event,
layout: Layout<'_>,
cursor_position: Point,
renderer: &Renderer,
clipboard: &mut dyn Clipboard,
shell: &mut Shell<'_, Message>,
) -> event::Status {
self.children
.iter_mut()
.zip(&mut tree.children)
.zip(layout.children())
.map(|((child, state), layout)| {
child.as_widget_mut().on_event(
state,
event.clone(),
layout,
cursor_position,
renderer,
clipboard,
shell,
)
})
.fold(event::Status::Ignored, event::Status::merge)
}
fn mouse_interaction(
&self,
tree: &Tree,
layout: Layout<'_>,
cursor_position: Point,
viewport: &Rectangle,
renderer: &Renderer,
) -> mouse::Interaction {
self.children
.iter()
.zip(&tree.children)
.zip(layout.children())
.map(|((child, state), layout)| {
child.as_widget().mouse_interaction(
state,
layout,
cursor_position,
viewport,
renderer,
)
})
.max()
.unwrap_or_default()
}
fn draw(
&self,
tree: &Tree,
renderer: &mut Renderer,
theme: &Renderer::Theme,
style: &renderer::Style,
layout: Layout<'_>,
cursor_position: Point,
viewport: &Rectangle,
) {
for ((child, state), layout) in self
.children
.iter()
.zip(&tree.children)
.zip(layout.children())
{
child.as_widget().draw(
state,
renderer,
theme,
style,
layout,
cursor_position,
viewport,
);
}
}
fn overlay<'b>(
&'b mut self,
tree: &'b mut Tree,
layout: Layout<'_>,
renderer: &Renderer,
) -> Option<overlay::Element<'b, Message, Renderer>> {
overlay::from_children(&mut self.children, tree, layout, renderer)
}
}
impl<'a, Message, Renderer> From<Row<'a, Message, Renderer>>
for Element<'a, Message, Renderer>
where
Message: 'a,
Renderer: crate::Renderer + 'a,
{
fn from(row: Row<'a, Message, Renderer>) -> Self {
Self::new(row)
}
}