gtk4/subclass/adjustment.rs
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// Take a look at the license at the top of the repository in the LICENSE file.
// rustdoc-stripper-ignore-next
//! Traits intended for subclassing [`Adjustment`](crate::Adjustment).
use glib::translate::*;
use crate::{ffi, prelude::*, subclass::prelude::*, Adjustment};
pub trait AdjustmentImpl: AdjustmentImplExt + ObjectImpl {
fn changed(&self) {
self.parent_changed()
}
fn value_changed(&self) {
self.parent_value_changed()
}
}
mod sealed {
pub trait Sealed {}
impl<T: super::AdjustmentImplExt> Sealed for T {}
}
pub trait AdjustmentImplExt: sealed::Sealed + ObjectSubclass {
fn parent_changed(&self) {
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GtkAdjustmentClass;
if let Some(f) = (*parent_class).changed {
f(self.obj().unsafe_cast_ref::<Adjustment>().to_glib_none().0)
}
}
}
fn parent_value_changed(&self) {
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GtkAdjustmentClass;
if let Some(f) = (*parent_class).value_changed {
f(self.obj().unsafe_cast_ref::<Adjustment>().to_glib_none().0)
}
}
}
}
impl<T: AdjustmentImpl> AdjustmentImplExt for T {}
unsafe impl<T: AdjustmentImpl> IsSubclassable<T> for Adjustment {
fn class_init(class: &mut glib::Class<Self>) {
Self::parent_class_init::<T>(class);
assert_initialized_main_thread!();
let klass = class.as_mut();
klass.changed = Some(adjustment_changed::<T>);
klass.value_changed = Some(adjustment_value_changed::<T>);
}
}
unsafe extern "C" fn adjustment_changed<T: AdjustmentImpl>(ptr: *mut ffi::GtkAdjustment) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
imp.changed()
}
unsafe extern "C" fn adjustment_value_changed<T: AdjustmentImpl>(ptr: *mut ffi::GtkAdjustment) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
imp.value_changed()
}