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// Take a look at the license at the top of the repository in the LICENSE file.
use crate::{prelude::*, NativeDialog, ResponseType};
use std::{
cell::{Cell, RefCell},
future::Future,
pin::Pin,
rc::Rc,
};
// rustdoc-stripper-ignore-next
/// Trait containing manually implemented methods of [`NativeDialog`](crate::NativeDialog).
#[cfg_attr(feature = "v4_10", deprecated = "Since 4.10")]
#[allow(deprecated)]
pub trait NativeDialogExtManual {
// rustdoc-stripper-ignore-next
/// Shows the dialog and returns a `Future` that resolves to the
/// `ResponseType` on response.
///
/// ```no_run
/// # use gtk4 as gtk;
/// use gtk::prelude::*;
///
/// # async fn run() {
/// let dialog = gtk::FileChooserNative::builder()
/// .title("Select a File")
/// .build();
///
/// dialog.run_future().await;
/// println!("Selected file: {:?}", dialog.file());
/// dialog.destroy();
/// # }
/// ```
fn run_future<'a>(&'a self) -> Pin<Box<dyn Future<Output = ResponseType> + 'a>>;
// rustdoc-stripper-ignore-next
/// Shows the dialog and calls the callback when a response has been received.
///
/// **Important**: this function isn't blocking.
///
/// ```no_run
/// # use gtk4 as gtk;
/// use gtk::prelude::*;
///
/// let dialog = gtk::FileChooserNative::builder()
/// .title("Select a File")
/// .build();
///
/// dialog.run_async(move |obj, answer| {
/// obj.destroy();
/// println!("Selected file: {:?}", obj.file());
/// });
/// ```
fn run_async<F: FnOnce(&Self, ResponseType) + 'static>(&self, f: F);
}
impl<O: IsA<NativeDialog>> NativeDialogExtManual for O {
fn run_future<'a>(&'a self) -> Pin<Box<dyn Future<Output = ResponseType> + 'a>> {
Box::pin(async move {
let (sender, receiver) = futures_channel::oneshot::channel();
let sender = Cell::new(Some(sender));
let response_handler = self.connect_response(move |_, response_type| {
if let Some(m) = sender.replace(None) {
let _result = m.send(response_type);
}
});
self.show();
if let Ok(response) = receiver.await {
self.disconnect(response_handler);
response
} else {
ResponseType::None
}
})
}
fn run_async<F: FnOnce(&Self, ResponseType) + 'static>(&self, f: F) {
let response_handler = Rc::new(RefCell::new(None));
let response_handler_clone = response_handler.clone();
let f = RefCell::new(Some(f));
*response_handler.borrow_mut() = Some(self.connect_response(move |s, response_type| {
if let Some(handler) = response_handler_clone.borrow_mut().take() {
s.disconnect(handler);
}
(*f.borrow_mut()).take().expect("cannot get callback")(s, response_type);
}));
self.show();
}
}