gtk4/subclass/accessible_range.rs
1// Take a look at the license at the top of the repository in the LICENSE file.
2
3// rustdoc-stripper-ignore-next
4//! Traits intended for implementing the
5//! [`AccessibleRange`](crate::AccessibleRange) interface.
6
7use glib::translate::*;
8
9use crate::{ffi, prelude::*, subclass::prelude::*, AccessibleRange};
10
11pub trait AccessibleRangeImpl: WidgetImpl {
12 fn set_current_value(&self, value: f64) -> bool {
13 self.parent_set_current_value(value)
14 }
15}
16
17mod sealed {
18 pub trait Sealed {}
19 impl<T: super::AccessibleRangeImplExt> Sealed for T {}
20}
21
22pub trait AccessibleRangeImplExt: sealed::Sealed + ObjectSubclass {
23 // Returns true if the operation was performed, false otherwise
24 fn parent_set_current_value(&self, value: f64) -> bool {
25 unsafe {
26 let type_data = Self::type_data();
27 let parent_iface = type_data.as_ref().parent_interface::<AccessibleRange>()
28 as *const ffi::GtkAccessibleRangeInterface;
29
30 let func = (*parent_iface)
31 .set_current_value
32 .expect("no parent \"set_current_value\" implementation");
33
34 from_glib(func(
35 self.obj()
36 .unsafe_cast_ref::<AccessibleRange>()
37 .to_glib_none()
38 .0,
39 value,
40 ))
41 }
42 }
43}
44
45impl<T: AccessibleRangeImpl> AccessibleRangeImplExt for T {}
46
47unsafe impl<T: AccessibleRangeImpl> IsImplementable<T> for AccessibleRange {
48 fn interface_init(iface: &mut glib::Interface<Self>) {
49 let iface = iface.as_mut();
50
51 iface.set_current_value = Some(accessible_range_set_current_value::<T>);
52 }
53}
54
55unsafe extern "C" fn accessible_range_set_current_value<T: AccessibleRangeImpl>(
56 accessible_range: *mut ffi::GtkAccessibleRange,
57 value: f64,
58) -> glib::ffi::gboolean {
59 let instance = &*(accessible_range as *mut T::Instance);
60 let imp = instance.imp();
61
62 imp.set_current_value(value).into_glib()
63}