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