gtk4/
callback_action.rs

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1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use glib::translate::*;
4use std::boxed::Box as Box_;
5
6use crate::{ffi, CallbackAction, Widget};
7
8impl CallbackAction {
9    /// Create a custom action that calls the given @callback when
10    /// activated.
11    /// ## `callback`
12    /// the callback
13    ///   to call when the action is activated
14    ///
15    /// # Returns
16    ///
17    /// A new shortcut action
18    #[doc(alias = "gtk_callback_action_new")]
19    pub fn new<P: Fn(&Widget, Option<&glib::Variant>) -> glib::Propagation + 'static>(
20        callback: P,
21    ) -> CallbackAction {
22        assert_initialized_main_thread!();
23        let callback_data: Box_<P> = Box_::new(callback);
24        unsafe extern "C" fn callback_func<
25            P: Fn(&Widget, Option<&glib::Variant>) -> glib::Propagation + 'static,
26        >(
27            widget: *mut ffi::GtkWidget,
28            args: *mut glib::ffi::GVariant,
29            user_data: glib::ffi::gpointer,
30        ) -> glib::ffi::gboolean {
31            let widget = from_glib_borrow(widget);
32            let args: Borrowed<Option<glib::Variant>> = from_glib_borrow(args);
33            let callback = &*(user_data as *mut P);
34            (*callback)(&widget, args.as_ref().as_ref()).into_glib()
35        }
36        let callback = Some(callback_func::<P> as _);
37        unsafe extern "C" fn destroy_func<
38            P: Fn(&Widget, Option<&glib::Variant>) -> glib::Propagation + 'static,
39        >(
40            data: glib::ffi::gpointer,
41        ) {
42            let _callback = Box_::from_raw(data as *mut P);
43        }
44        let destroy_call2 = Some(destroy_func::<P> as _);
45        let super_callback0: Box_<P> = callback_data;
46        unsafe {
47            from_glib_full(ffi::gtk_callback_action_new(
48                callback,
49                Box_::into_raw(super_callback0) as *mut _,
50                destroy_call2,
51            ))
52        }
53    }
54}
gtk4/callback_action.rs

gtk4/
callback_action.rs
