window-observer-rs

This crate provides an observer that receives events such as window movement and resizing. It is designed to receive window events on Windows and macOS for cross-platform applications.

⚠️ It is not production ready yet. Expect extremely disruptive changes.

ToDo

First release todos:

• macOS
  • Resize detection
  • Move detection
  • Foreground detection
  • Resize detection with information such as width, height
  • Move detection with information such as x, y.
  • Get the window title
• Windows
  • Resize detection
  • Move detectio
  • Foreground detectionn
  • Resize detection with information such as width, height
  • Move detection with information such as x, y.
  • Get the window title
• Linux? I have no plans to make this at this time due to my inexperienced knowledge about Linux.
  But I'd be happy to receive pull requests.

Example

use window_observer::{self, Event, WindowObserver};

#[tokio::main]
async fn main() {
    let pid = std::env::var("PID")
        .map(|v| v.parse().unwrap())
        .expect("Please give me the env `PID` of application that has window.");

    let (event_tx, mut event_rx) = tokio::sync::mpsc::unbounded_channel();
    let event_filter = window_observer::smallvec![Event::Activated, Event::Moved, Event::Resized];

    let _window_observer = WindowObserver::start(pid, event_tx, event_filter)
        .await
        .unwrap();

    while let Some((_window, event)) = event_rx.recv().await {
        println!("{event:?}");
    }
}

Acknowledgements

• Windows event handler: wineventhook-rs