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use crate::subclass::prelude::*;
use crate::Scale;
use glib::translate::*;
use glib::Cast;
pub trait ScaleImpl: ScaleImplExt + RangeImpl {
#[doc(alias = "get_layout_offsets")]
fn layout_offsets(&self) -> (i32, i32) {
self.parent_layout_offsets()
}
}
pub trait ScaleImplExt: ObjectSubclass {
fn parent_layout_offsets(&self) -> (i32, i32);
}
impl<T: ScaleImpl> ScaleImplExt for T {
fn parent_layout_offsets(&self) -> (i32, i32) {
unsafe {
let data = T::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GtkScaleClass;
let mut x = 0;
let mut y = 0;
if let Some(f) = (*parent_class).get_layout_offsets {
f(
self.obj().unsafe_cast_ref::<Scale>().to_glib_none().0,
&mut x,
&mut y,
);
}
(x, y)
}
}
}
unsafe impl<T: ScaleImpl> IsSubclassable<T> for Scale {
fn class_init(class: &mut glib::Class<Self>) {
Self::parent_class_init::<T>(class);
let klass = class.as_mut();
klass.get_layout_offsets = Some(scale_get_layout_offsets::<T>);
}
}
unsafe extern "C" fn scale_get_layout_offsets<T: ScaleImpl>(
ptr: *mut ffi::GtkScale,
x_ptr: *mut libc::c_int,
y_ptr: *mut libc::c_int,
) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
let (x, y) = imp.layout_offsets();
*x_ptr = x;
*y_ptr = y;
}