gtk4/
native_dialog.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
// Take a look at the license at the top of the repository in the LICENSE file.

use std::{
    cell::{Cell, RefCell},
    future::Future,
    pin::Pin,
    rc::Rc,
};

use crate::{prelude::*, NativeDialog, ResponseType};

// 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: IsA<NativeDialog> {
    // 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>> {
        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
            }
        })
    }

    // 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) {
        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();
    }
}

impl<O: IsA<NativeDialog>> NativeDialogExtManual for O {}