use std::{boxed::Box as Box_, mem::transmute};
use glib::{
signal::{connect_raw, SignalHandlerId},
translate::*,
};
use crate::{ffi, prelude::*, DragSurface, DragSurfaceSize};
pub trait DragSurfaceExtManual: IsA<DragSurface> {
#[cfg(feature = "v4_12")]
#[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
#[doc(alias = "compute-size")]
fn connect_compute_size<F: Fn(&DragSurface, &mut DragSurfaceSize) + 'static>(
&self,
f: F,
) -> SignalHandlerId {
unsafe extern "C" fn compute_size_trampoline<
F: Fn(&DragSurface, &mut DragSurfaceSize) + 'static,
>(
this: *mut ffi::GdkDragSurface,
size: *mut ffi::GdkDragSurfaceSize,
f: glib::ffi::gpointer,
) {
let f: &F = &*(f as *const F);
f(
&from_glib_borrow(this),
&mut *(size as *mut DragSurfaceSize),
)
}
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::<*const (), unsafe extern "C" fn()>(
compute_size_trampoline::<F> as *const (),
)),
Box_::into_raw(f),
)
}
}
}
impl<O: IsA<DragSurface>> DragSurfaceExtManual for O {}