Lib.rs

Start a drag operation out of a window on macOS, Windows and Linux (via GTK).

Tested for tao (latest), winit (latest), wry (v0.24) and tauri (v1) windows.

Due to the GTK-based implementation, winit currently cannot leverage this crate on Linux yet.

• Add the drag dependency:

$ cargo add drag

• Use the drag::start_drag function. It takes a &T: raw_window_handle::HasRawWindowHandle type on macOS and Windows, and a &gtk::ApplicationWindow on Linux:

• tao:

  let event_loop = tao::event_loop::EventLoop::new();
  let window = tao::window::WindowBuilder::new().build(&event_loop).unwrap();
  
  let item = drag::DragItem::Files(vec![std::fs::canonicalize("./examples/icon.png").unwrap()]);
  let preview_icon = drag::Image::File("./examples/icon.png".into());
  
  drag::start_drag(
    #[cfg(target_os = "linux")]
    {
      use tao::platform::unix::WindowExtUnix;
      window.gtk_window()
    },
    #[cfg(not(target_os = "linux"))]
    &window,
    item,
    preview_icon,
    |result, cursor_position| {
      println!("drag result: {result:?}");
    },
    drag::Options::default(),
  );
  

  • wry:

  let event_loop = wry::application::event_loop::EventLoop::new();
  let window = wry::application::window::WindowBuilder::new().build(&event_loop).unwrap();
  let webview = wry::webview::WebViewBuilder::new(window).unwrap().build().unwrap();
  
  let item = drag::DragItem::Files(vec![std::fs::canonicalize("./examples/icon.png").unwrap()]);
  let preview_icon = drag::Image::File("./examples/icon.png".into());
  
  drag::start_drag(
    #[cfg(target_os = "linux")]
    {
      use wry::application::platform::unix::WindowExtUnix;
      webview.window().gtk_window()
    },
    #[cfg(not(target_os = "linux"))]
    &webview.window(),
    item,
    preview_icon,
    |result, cursor_position| {
      println!("drag result: {result:?}");
    },
    drag::Options::default(),
  );
  

  • winit:

  let event_loop = winit::event_loop::EventLoop::new().unwrap();
  let window = winit::window::WindowBuilder::new().build(&event_loop).unwrap();
  
  let item = drag::DragItem::Files(vec![std::fs::canonicalize("./examples/icon.png").unwrap()]);
  let preview_icon = drag::Image::File("./examples/icon.png".into());
  
  let _ = drag::start_drag(&window, item, preview_icon, |result, cursor_position| {
    println!("drag result: {result:?}");
  }, Default::default());