Converting an IInspectable to a RenderingEventArgs - rust

Question

How do you convert an IInspectable reference to a RenderingEventArgs in the following taken from the full xaml_app code below?
CompositionTarget::Rendering(EventHandler::new(move |_, args: &Option<IInspectable>| {
let args: &IInspectable = args.as_ref().unwrap();
//let render_args = RenderingEventArgs::from(&args);
//let render_args: RenderingEventArgs = args.try_into()?;
Ok(())
}))?;
Full code listing follows for context:
#![windows_subsystem = "windows"]
#![allow(non_snake_case)]
use windows::{
core::{
IInspectable,
Result,
HSTRING,
implement,
},
ApplicationModel::Activation::LaunchActivatedEventArgs,
Win32::System::Com::{
CoInitializeEx,
COINIT_MULTITHREADED,
},
Foundation::EventHandler,
//Foundation::TypedEventHandler,
UI::{
Colors,
Xaml::{
Controls::{
TextBlock,
},
Application,
ApplicationInitializationCallback,
Window,
Media::{
FontFamily,
SolidColorBrush,
CompositionTarget,
RenderingEventArgs,
},
HorizontalAlignment,
VerticalAlignment,
FrameworkElement,
IApplicationOverrides,
IApplicationOverrides_Impl,
},
},
};
//use std::convert::TryInto;
#[implement(IApplicationOverrides)]
struct App();
impl IApplicationOverrides_Impl for App {
fn OnLaunched(&self, _: &Option<LaunchActivatedEventArgs>) -> Result<()> {
let block = TextBlock::new()?;
block.SetFontFamily(FontFamily::CreateInstanceWithName(HSTRING::from("Segoe UI Semibold"))?)?;
block.SetFontSize(72.0)?;
block.SetForeground(SolidColorBrush::CreateInstanceWithColor(Colors::Orange()?)?)?;
let fe = FrameworkElement::from(&block);
fe.SetHorizontalAlignment(HorizontalAlignment::Center)?;
fe.SetVerticalAlignment(VerticalAlignment::Center)?;
let window = Window::Current()?;
window.SetContent(&block)?;
window.Activate()?;
CompositionTarget::Rendering(EventHandler::new(move |_, args: &Option<IInspectable>| {
let args: &IInspectable = args.as_ref().unwrap();
//let render_args = RenderingEventArgs::from(&args);
//let render_args: RenderingEventArgs = args.try_into()?;
Ok(())
}))?;
Ok(())
}
}
fn main() -> Result<()> {
unsafe {
CoInitializeEx(std::ptr::null(), COINIT_MULTITHREADED)?;
}
Application::Start(ApplicationInitializationCallback::new(|_| {
Application::compose(App())?;
Ok(())
}))
}
[package]
name = "expanding_text"
version = "0.0.0"
edition = "2018"
[dependencies]
futures = "0.3"
[dependencies.windows]
version = "0.36"
features = [
"implement",
"ApplicationModel_Activation",
"Win32_System_Com",
"UI_Xaml_Controls",
"UI_Xaml",
"UI_Xaml_Media",
"UI",
"Storage_Pickers",
"Foundation_Collections",
"Storage",
"Foundation",
"Storage_Streams",
"Graphics_Imaging",
"Media_Ocr",
"ApplicationModel_Core",
"UI_Core",
]

Answer 1

The following line appears to make the conversion and builds:
let render_args: RenderingEventArgs = args.cast()?;