gtk/subclass/
plug.rs

1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use glib::subclass::prelude::*;
4
5use glib::object::Cast;
6use glib::translate::*;
7
8use super::window::WindowImpl;
9use crate::{Plug, ffi};
10
11pub trait PlugImpl: PlugImplExt + WindowImpl {
12    fn embedded(&self) {
13        self.parent_embedded()
14    }
15}
16
17mod sealed {
18    pub trait Sealed {}
19    impl<T: super::PlugImpl> Sealed for T {}
20}
21
22pub trait PlugImplExt: ObjectSubclass + sealed::Sealed {
23    fn parent_embedded(&self) {
24        unsafe {
25            let data = Self::type_data();
26            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkPlugClass;
27            if let Some(f) = (*parent_class).embedded {
28                f(self.obj().unsafe_cast_ref::<Plug>().to_glib_none().0)
29            }
30        }
31    }
32}
33
34impl<T: PlugImpl> PlugImplExt for T {}
35
36unsafe impl<T: PlugImpl> IsSubclassable<T> for Plug {
37    fn class_init(class: &mut ::glib::Class<Self>) {
38        Self::parent_class_init::<T>(class);
39
40        if !crate::rt::is_initialized() {
41            panic!("GTK has to be initialized first");
42        }
43
44        let klass = class.as_mut();
45        klass.embedded = Some(plug_embedded::<T>);
46    }
47}
48
49unsafe extern "C" fn plug_embedded<T: PlugImpl>(ptr: *mut ffi::GtkPlug) {
50    unsafe {
51        let instance = &*(ptr as *mut T::Instance);
52        let imp = instance.imp();
53
54        imp.embedded()
55    }
56}
gtk/subclass/plug.rs

gtk/subclass/
plug.rs
