如何修改由Rust闭包捕获的变量?

我正在尝试为一个Rust应用程序制作一个GUI,看起来它对我来说很有用的是 imgui-rs support code 这对我来说已经足够让helloworld演示正常工作了,但是当我试图修改它以获取输入并更改显示时,我遇到了所有权问题。我现在要做的是让用户输入一个图像名称,然后打开该文件并在GUI中显示它。

struct State {
    path: ImString,
    has_image: bool,
}
impl Default for State {
    fn default() -> Self {
        Self {
            path: ImString::with_capacity(128),
            has_image: false,
        }
    }
}
fn main() {
    let mut system = imgui_support::init(file!()); // this is from support code
    let mut state = State::default();

    system.main_loop(move |_, ui| {
        Window::new(im_str!("hello world"))
            .size([330.0, 110.0], imgui::Condition::FirstUseEver)
            .position([0f32, 0f32], imgui::Condition::FirstUseEver)
            .build(ui, || {
                ui.input_text(im_str!("File path"), &mut state.path).build();
                if ui.small_button(im_str!("Submit file")) {
                    system.add_img(state.path.to_str()); // try to open file and parse as texture
                }
                ui.separator();
            });
        if state.has_image {
            Window::new(im_str!("Render:"))
                .size([720f32, 720f32], imgui::Condition::FirstUseEver)
                .build(ui, || {
                    imgui::Image::new(TextureId::new(0), [720f32, 720f32]).build(ui);
                });
        }
    });
}

这个 add_img 函数,我在 System

    pub fn add_img(&mut self, path: &str) -> TextureId {
        let textures: &mut Textures<Texture> = &mut self.renderer.textures();
        let res_img = image::open(path);
        match res_img {
            Ok(image) => {
                let image = image.to_rgba8();
                let dimensions = image.dimensions();
                let texture = RawImage2d::from_raw_rgba(image.into_raw(), dimensions);
                let gl_texture = Texture2d::new(self.display.get_context(), texture).unwrap();
                let texture = imgui_glium_renderer::Texture {
                    texture: Rc::new(gl_texture),
                    sampler: SamplerBehavior {
                        magnify_filter: MagnifySamplerFilter::Linear,
                        minify_filter: MinifySamplerFilter::Linear,
                        ..Default::default()
                    },
                };
                textures.insert(texture)
            }
            Err(_) => TextureId::new(usize::MAX),
        }
    }

use of moved value system ,并且无论我如何尝试排列数据,我似乎都无法避免移动后的使用错误。