gtk4/
native_dialog.rs

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1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use std::{
4    cell::{Cell, RefCell},
5    future::Future,
6    pin::Pin,
7    rc::Rc,
8};
9
10use crate::{prelude::*, NativeDialog, ResponseType};
11
12mod sealed {
13    pub trait Sealed {}
14    impl<T: super::IsA<super::NativeDialog>> Sealed for T {}
15}
16
17// rustdoc-stripper-ignore-next
18/// Trait containing manually implemented methods of
19/// [`NativeDialog`](crate::NativeDialog).
20#[cfg_attr(feature = "v4_10", deprecated = "Since 4.10")]
21#[allow(deprecated)]
22pub trait NativeDialogExtManual: sealed::Sealed + IsA<NativeDialog> {
23    // rustdoc-stripper-ignore-next
24    /// Shows the dialog and returns a `Future` that resolves to the
25    /// `ResponseType` on response.
26    ///
27    /// ```no_run
28    /// # use gtk4 as gtk;
29    /// use gtk::prelude::*;
30    ///
31    /// # async fn run() {
32    /// let dialog = gtk::FileChooserNative::builder()
33    ///     .title("Select a File")
34    ///     .build();
35    ///
36    /// dialog.run_future().await;
37    /// println!("Selected file: {:?}", dialog.file());
38    /// dialog.destroy();
39    /// # }
40    /// ```
41    fn run_future<'a>(&'a self) -> Pin<Box<dyn Future<Output = ResponseType> + 'a>> {
42        Box::pin(async move {
43            let (sender, receiver) = futures_channel::oneshot::channel();
44
45            let sender = Cell::new(Some(sender));
46
47            let response_handler = self.connect_response(move |_, response_type| {
48                if let Some(m) = sender.replace(None) {
49                    let _result = m.send(response_type);
50                }
51            });
52
53            self.show();
54
55            if let Ok(response) = receiver.await {
56                self.disconnect(response_handler);
57                response
58            } else {
59                ResponseType::None
60            }
61        })
62    }
63
64    // rustdoc-stripper-ignore-next
65    /// Shows the dialog and calls the callback when a response has been
66    /// received.
67    ///
68    /// **Important**: this function isn't blocking.
69    ///
70    /// ```no_run
71    /// # use gtk4 as gtk;
72    /// use gtk::prelude::*;
73    ///
74    /// let dialog = gtk::FileChooserNative::builder()
75    ///     .title("Select a File")
76    ///     .build();
77    ///
78    /// dialog.run_async(move |obj, answer| {
79    ///     obj.destroy();
80    ///     println!("Selected file: {:?}", obj.file());
81    /// });
82    /// ```
83    fn run_async<F: FnOnce(&Self, ResponseType) + 'static>(&self, f: F) {
84        let response_handler = Rc::new(RefCell::new(None));
85        let response_handler_clone = response_handler.clone();
86        let f = RefCell::new(Some(f));
87        *response_handler.borrow_mut() = Some(self.connect_response(move |s, response_type| {
88            if let Some(handler) = response_handler_clone.borrow_mut().take() {
89                s.disconnect(handler);
90            }
91            (*f.borrow_mut()).take().expect("cannot get callback")(s, response_type);
92        }));
93        self.show();
94    }
95}
96
97impl<O: IsA<NativeDialog>> NativeDialogExtManual for O {}
gtk4/native_dialog.rs

gtk4/
native_dialog.rs
