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
use crate::subclass::prelude::*;
use crate::{Allocation, Frame};
use glib::translate::*;
use glib::Cast;
pub trait FrameImpl: FrameImplExt + WidgetImpl {
fn compute_child_allocation(&self, frame: &Self::Type) -> Allocation {
self.parent_compute_child_allocation(frame)
}
}
pub trait FrameImplExt: ObjectSubclass {
fn parent_compute_child_allocation(&self, frame: &Self::Type) -> Allocation;
}
impl<T: FrameImpl> FrameImplExt for T {
fn parent_compute_child_allocation(&self, frame: &Self::Type) -> Allocation {
unsafe {
let data = T::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GtkFrameClass;
let f = (*parent_class)
.compute_child_allocation
.expect("No parent class impl for \"compute_child_allocation\"");
let mut allocation = Allocation::uninitialized();
f(
frame.unsafe_cast_ref::<Frame>().to_glib_none().0,
allocation.to_glib_none_mut().0,
);
allocation
}
}
}
unsafe impl<T: FrameImpl> IsSubclassable<T> for Frame {
fn class_init(class: &mut glib::Class<Self>) {
Self::parent_class_init::<T>(class);
let klass = class.as_mut();
klass.compute_child_allocation = Some(frame_compute_child_allocation::<T>);
}
}
unsafe extern "C" fn frame_compute_child_allocation<T: FrameImpl>(
ptr: *mut ffi::GtkFrame,
allocationptr: *mut ffi::GtkAllocation,
) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
let wrap: Borrowed<Frame> = from_glib_borrow(ptr);
let allocation = imp.compute_child_allocation(wrap.unsafe_cast_ref());
*allocationptr = *allocation.to_glib_none().0;
}