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|
pub mod widget;
pub(crate) mod flex;
pub use widget::*;
use iced_native::event::{self, Event};
use iced_native::layout::{self, Layout};
use iced_native::mouse;
use iced_native::renderer;
use iced_native::{Clipboard, Hasher, Length, Point, Rectangle, Shell};
pub struct Pure<'a, Message, Renderer> {
state: &'a mut State,
element: Element<'a, Message, Renderer>,
}
impl<'a, Message, Renderer> Pure<'a, Message, Renderer>
where
Message: 'static,
Renderer: iced_native::Renderer + 'static,
{
pub fn new(
state: &'a mut State,
content: impl Into<Element<'a, Message, Renderer>>,
) -> Self {
let element = content.into();
let _ = state.diff(&element);
Self { state, element }
}
}
pub struct State {
state_tree: widget::Tree,
}
impl State {
pub fn new() -> Self {
Self {
state_tree: widget::Tree::empty(),
}
}
fn diff<Message, Renderer>(
&mut self,
new_element: &Element<Message, Renderer>,
) {
self.state_tree.diff(new_element);
}
}
impl<'a, Message, Renderer> iced_native::Widget<Message, Renderer>
for Pure<'a, Message, Renderer>
where
Renderer: iced_native::Renderer,
{
fn width(&self) -> Length {
self.element.as_widget().width()
}
fn height(&self) -> Length {
self.element.as_widget().height()
}
fn hash_layout(&self, state: &mut Hasher) {
self.element.as_widget().hash_layout(state)
}
fn layout(
&self,
renderer: &Renderer,
limits: &layout::Limits,
) -> layout::Node {
self.element.as_widget().layout(renderer, limits)
}
fn on_event(
&mut self,
event: Event,
layout: Layout<'_>,
cursor_position: Point,
renderer: &Renderer,
clipboard: &mut dyn Clipboard,
shell: &mut Shell<'_, Message>,
) -> event::Status {
self.element.as_widget_mut().on_event(
&mut self.state.state_tree,
event,
layout,
cursor_position,
renderer,
clipboard,
shell,
)
}
fn draw(
&self,
renderer: &mut Renderer,
style: &renderer::Style,
layout: Layout<'_>,
cursor_position: Point,
viewport: &Rectangle,
) {
self.element.as_widget().draw(
&self.state.state_tree,
renderer,
style,
layout,
cursor_position,
viewport,
)
}
fn mouse_interaction(
&self,
layout: Layout<'_>,
cursor_position: Point,
viewport: &Rectangle,
renderer: &Renderer,
) -> mouse::Interaction {
self.element.as_widget().mouse_interaction(
&self.state.state_tree,
layout,
cursor_position,
viewport,
renderer,
)
}
}
impl<'a, Message, Renderer> Into<iced_native::Element<'a, Message, Renderer>>
for Pure<'a, Message, Renderer>
where
Message: 'a,
Renderer: iced_native::Renderer + 'a,
{
fn into(self) -> iced_native::Element<'a, Message, Renderer> {
iced_native::Element::new(self)
}
}
|
