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|
use crate::{Primitive, Renderer};
use iced_native::{
scrollable, Background, Color, Layout, Point, Rectangle, Scrollable, Widget,
};
impl scrollable::Renderer for Renderer {
fn draw<Message>(
&mut self,
scrollable: &Scrollable<'_, Message, Self>,
layout: Layout<'_>,
cursor_position: Point,
) -> Self::Output {
let bounds = layout.bounds();
let is_mouse_over = bounds.contains(cursor_position);
let content = layout.children().next().unwrap();
let content_bounds = content.bounds();
let offset = scrollable.state.offset(bounds, content_bounds);
let cursor_position = if bounds.contains(cursor_position) {
Point::new(cursor_position.x, cursor_position.y + offset as f32)
} else {
Point::new(cursor_position.x, -1.0)
};
let (content, mouse_cursor) =
scrollable.content.draw(self, content, cursor_position);
let primitive = Primitive::Scrollable {
bounds,
offset,
content: Box::new(content),
};
(
Primitive::Group {
primitives: if is_mouse_over
&& content_bounds.height > bounds.height
{
let ratio = bounds.height / content_bounds.height;
let scrollbar_height = bounds.height * ratio;
let y_offset = offset as f32 * ratio;
let scrollbar = Primitive::Quad {
bounds: Rectangle {
x: bounds.x + bounds.width - 12.0,
y: bounds.y + y_offset,
width: 10.0,
height: scrollbar_height,
},
background: Background::Color(Color {
r: 0.0,
g: 0.0,
b: 0.0,
a: 0.5,
}),
border_radius: 5,
};
vec![primitive, scrollbar]
} else {
vec![primitive]
},
},
mouse_cursor,
)
}
}
|
