如何在 Windows 的 Rust 板条箱中为 CoreApp 注册 PointerPressed 事件处理程序？

Question

E0277 The trait IntoParam TypeEventHandler<CoreWindow, PointerEventArgs> bound is not compatible 错误信息

fn SetWindow(&mut self, window: &Option<CoreWindow>) -> Result<()> {
    let compositor = Compositor::new()?;
    let root = compositor.CreateContainerVisual()?;
    self.target = Some(compositor.CreateTargetForCurrentView()?);
    self.target.as_ref().unwrap().SetRoot(&root)?; // &root
    self.visuals = Some(root.Children()?);
    //window.unwrap().PointerPressed(handler: Param0)?;
    window.unwrap().PointerPressed(Self::OnPointerPressed)?;
    Ok(())
}

fn OnPointerPressed(win: CoreWindow, pea: PointerEventArgs) {
    //...
}

Answer 1

上面的代码现在通过对 SetWindow function 和 OnPointerPressed function 末尾的以下编辑进行构建：

    window.as_ref().unwrap().PointerPressed(
        TypedEventHandler::new(Self::OnPointerPressed))?;
    Ok(())
}

fn OnPointerPressed(_: &Option<CoreWindow>,
    args: &Option<PointerEventArgs>)
    -> Result<()> {
        Ok(())
}