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use super::backend::IcedChartBackend;
use super::native::Renderer as ChartRenderer;
use iced_graphics::{backend, canvas, canvas::Cursor, Backend, Primitive, Renderer};
use iced_native::{event, mouse::Interaction, Font, Point, Rectangle, Vector};
use plotters::prelude::DrawingArea;
use plotters_backend::{FontFamily, FontStyle};
pub type ChartWidget<'a, Message, C> = super::native::ChartWidget<'a, Message, C>;
impl<B: Backend + backend::Text> ChartRenderer for Renderer<B> {
fn draw_chart<Message, C>(
&self,
chart: &C,
font_resolver: &Box<dyn Fn(FontFamily, FontStyle) -> Font>,
_defaults: &Self::Defaults,
layout: iced_native::Layout<'_>,
_cursor_position: Point,
_viewport: &Rectangle,
) -> Self::Output
where
C: crate::Chart<Message>,
{
let bounds = layout.bounds();
let geometry = chart.draw(bounds.size(), |frame| {
let backend = IcedChartBackend::new(frame, self.backend(), font_resolver);
let root: DrawingArea<_, _> = backend.into();
chart.draw_chart(root);
});
let translation = Vector::new(bounds.x, bounds.y);
let cursor = Interaction::default();
(
Primitive::Translate {
translation,
content: Box::new(geometry.into()),
},
cursor,
)
}
fn on_event<Message, C: crate::Chart<Message>>(
&self,
chart: &mut C,
event: iced_native::Event,
layout: iced_native::Layout<'_>,
cursor_position: Point,
_clipboard: &mut dyn iced_native::Clipboard,
messages: &mut Vec<Message>,
) -> iced_native::event::Status {
let bounds = layout.bounds();
let canvas_event = match event {
iced_native::Event::Mouse(mouse_event) => Some(canvas::Event::Mouse(mouse_event)),
iced_native::Event::Keyboard(keyboard_event) => {
Some(canvas::Event::Keyboard(keyboard_event))
}
_ => None,
};
if let Some(canvas_event) = canvas_event {
let cursor = Cursor::Available(cursor_position);
let (status, message) = chart.update(canvas_event, bounds, cursor);
if let Some(m) = message {
messages.push(m);
}
return status;
}
event::Status::Ignored
}
}