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use crate::subclass::prelude::*;
use crate::DrawingArea;
use glib::translate::*;
use glib::Cast;
pub trait DrawingAreaImpl: DrawingAreaImplExt + WidgetImpl {
fn resize(&self, width: i32, height: i32) {
self.parent_resize(width, height)
}
}
pub trait DrawingAreaImplExt: ObjectSubclass {
fn parent_resize(&self, width: i32, height: i32);
}
impl<T: DrawingAreaImpl> DrawingAreaImplExt for T {
fn parent_resize(&self, width: i32, height: i32) {
unsafe {
let data = T::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GtkDrawingAreaClass;
if let Some(f) = (*parent_class).resize {
f(
self.obj().unsafe_cast_ref::<DrawingArea>().to_glib_none().0,
width,
height,
)
}
}
}
}
unsafe impl<T: DrawingAreaImpl> IsSubclassable<T> for DrawingArea {
fn class_init(class: &mut glib::Class<Self>) {
Self::parent_class_init::<T>(class);
let klass = class.as_mut();
klass.resize = Some(drawing_area_resize::<T>);
}
}
unsafe extern "C" fn drawing_area_resize<T: DrawingAreaImpl>(
ptr: *mut ffi::GtkDrawingArea,
width: i32,
height: i32,
) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
imp.resize(width, height)
}