use std::{boxed::Box as Box_, mem::transmute};
use glib::{
signal::{connect_raw, SignalHandlerId},
translate::*,
};
use crate::{prelude::*, Toplevel, ToplevelSize};
mod sealed {
pub trait Sealed {}
impl<T: super::IsA<super::Toplevel>> Sealed for T {}
}
pub trait ToplevelExtManual: sealed::Sealed + IsA<Toplevel> {
fn connect_compute_size<F: Fn(&Toplevel, &mut ToplevelSize) + 'static>(
&self,
f: F,
) -> SignalHandlerId {
unsafe extern "C" fn compute_size_trampoline<
F: Fn(&Toplevel, &mut ToplevelSize) + 'static,
>(
this: *mut ffi::GdkToplevel,
size: *mut ffi::GdkToplevelSize,
f: glib::ffi::gpointer,
) {
let f: &F = &*(f as *const F);
f(&from_glib_borrow(this), &mut *(size as *mut ToplevelSize))
}
unsafe {
let f: Box_<F> = Box_::new(f);
connect_raw(
self.as_ptr() as *mut _,
b"compute-size\0".as_ptr() as *const _,
Some(transmute::<_, unsafe extern "C" fn()>(
compute_size_trampoline::<F> as *const (),
)),
Box_::into_raw(f),
)
}
}
}
impl<O: IsA<Toplevel>> ToplevelExtManual for O {}