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use crate::subclass::prelude::*;
use crate::{ScaleButton, Widget};
use glib::translate::*;
use glib::Cast;
pub trait ScaleButtonImpl: ScaleButtonImplExt + WidgetImpl {
fn value_changed(&self, scale_button: &Self::Type, new_value: f64) {
self.parent_value_changed(scale_button, new_value)
}
}
pub trait ScaleButtonImplExt: ObjectSubclass {
fn parent_value_changed(&self, scale_button: &Self::Type, new_value: f64);
}
impl<T: ScaleButtonImpl> ScaleButtonImplExt for T {
fn parent_value_changed(&self, scale_button: &Self::Type, new_value: f64) {
unsafe {
let data = T::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GtkScaleButtonClass;
if let Some(f) = (*parent_class).value_changed {
f(
scale_button
.unsafe_cast_ref::<ScaleButton>()
.to_glib_none()
.0,
new_value,
)
}
}
}
}
unsafe impl<T: ScaleButtonImpl> IsSubclassable<T> for ScaleButton {
fn class_init(class: &mut glib::Class<Self>) {
<Widget as IsSubclassable<T>>::class_init(class);
let klass = class.as_mut();
klass.value_changed = Some(scale_button_value_changed::<T>);
}
fn instance_init(instance: &mut glib::subclass::InitializingObject<T>) {
<Widget as IsSubclassable<T>>::instance_init(instance);
}
}
unsafe extern "C" fn scale_button_value_changed<T: ScaleButtonImpl>(
ptr: *mut ffi::GtkScaleButton,
new_value: f64,
) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.impl_();
let wrap: Borrowed<ScaleButton> = from_glib_borrow(ptr);
imp.value_changed(wrap.unsafe_cast_ref(), new_value)
}