image::Viewer widget always clipping the bottom and right sides when the zoomed image exceeds the container

[stevekki]

Is your issue REALLY a bug?

• My issue is indeed a bug!
• I am not crazy! I will not fill out this form just to ask a question or request a feature. Pinky promise.

Is there an existing issue for this?

• I have searched the existing issues.

Is this issue related to iced?

• My hardware is compatible and my graphics drivers are up-to-date.

What happened?

When using the Viewer widget, the image is always cropped at the bottom and right edges once it exceeds the container after zooming.

Screencast_1.webm

example:

use iced::widget::{
    center,
    image::{Handle, viewer},
};

pub fn main() -> iced::Result {
    iced::application(App::new, App::update, App::view).run()
}

#[derive(Debug, Clone)]
enum Message {}

struct App {
    handle: Handle,
}

impl App {
    fn new() -> Self {
        Self {
            handle: Handle::from_path("ferris.png"),
        }
    }

    fn update(&mut self, _: Message) {}

    fn view(&self) -> iced::Element<'_, Message> {
        center(viewer(self.handle.clone())).into()
    }
}

What is the expected behavior?

When the zoomed image exceeds the container, it should not be cropped at the bottom or right edges.

Screencast_2.webm

Version

master

Operating System

Linux

Do you have any log output?