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//! Zoom and pan on an image.
use crate::backend::{self, Backend};
use crate::{Primitive, Renderer};
use iced_native::image;
use iced_native::image::viewer;
use iced_native::mouse;
use iced_native::{Rectangle, Size, Vector};
impl<B> viewer::Renderer for Renderer<B>
where
B: Backend + backend::Image,
{
fn draw(
&mut self,
state: &viewer::State,
bounds: Rectangle,
image_size: Size,
translation: Vector,
handle: image::Handle,
is_mouse_over: bool,
) -> Self::Output {
(
{
Primitive::Clip {
bounds,
content: Box::new(Primitive::Translate {
translation,
content: Box::new(Primitive::Image {
handle,
bounds: Rectangle {
x: bounds.x,
y: bounds.y,
..Rectangle::with_size(image_size)
},
}),
}),
offset: Vector::new(0, 0),
}
},
{
if state.is_cursor_grabbed() {
mouse::Interaction::Grabbing
} else if is_mouse_over
&& (image_size.width > bounds.width
|| image_size.height > bounds.height)
{
mouse::Interaction::Grab
} else {
mouse::Interaction::Idle
}
},
)
}
}
|
