gtk4/subclass/adjustment.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 subclassing [`Adjustment`](crate::Adjustment).
5
6use glib::translate::*;
7
8use crate::{ffi, prelude::*, subclass::prelude::*, Adjustment};
9
10pub trait AdjustmentImpl: AdjustmentImplExt + ObjectImpl {
11 fn changed(&self) {
12 self.parent_changed()
13 }
14
15 fn value_changed(&self) {
16 self.parent_value_changed()
17 }
18}
19
20mod sealed {
21 pub trait Sealed {}
22 impl<T: super::AdjustmentImplExt> Sealed for T {}
23}
24
25pub trait AdjustmentImplExt: sealed::Sealed + ObjectSubclass {
26 fn parent_changed(&self) {
27 unsafe {
28 let data = Self::type_data();
29 let parent_class = data.as_ref().parent_class() as *mut ffi::GtkAdjustmentClass;
30 if let Some(f) = (*parent_class).changed {
31 f(self.obj().unsafe_cast_ref::<Adjustment>().to_glib_none().0)
32 }
33 }
34 }
35
36 fn parent_value_changed(&self) {
37 unsafe {
38 let data = Self::type_data();
39 let parent_class = data.as_ref().parent_class() as *mut ffi::GtkAdjustmentClass;
40 if let Some(f) = (*parent_class).value_changed {
41 f(self.obj().unsafe_cast_ref::<Adjustment>().to_glib_none().0)
42 }
43 }
44 }
45}
46
47impl<T: AdjustmentImpl> AdjustmentImplExt for T {}
48
49unsafe impl<T: AdjustmentImpl> IsSubclassable<T> for Adjustment {
50 fn class_init(class: &mut glib::Class<Self>) {
51 Self::parent_class_init::<T>(class);
52
53 assert_initialized_main_thread!();
54
55 let klass = class.as_mut();
56 klass.changed = Some(adjustment_changed::<T>);
57 klass.value_changed = Some(adjustment_value_changed::<T>);
58 }
59}
60
61unsafe extern "C" fn adjustment_changed<T: AdjustmentImpl>(ptr: *mut ffi::GtkAdjustment) {
62 let instance = &*(ptr as *mut T::Instance);
63 let imp = instance.imp();
64
65 imp.changed()
66}
67
68unsafe extern "C" fn adjustment_value_changed<T: AdjustmentImpl>(ptr: *mut ffi::GtkAdjustment) {
69 let instance = &*(ptr as *mut T::Instance);
70 let imp = instance.imp();
71
72 imp.value_changed()
73}