gtk/subclass/
toggle_button.rs

1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use glib::object::Cast;
4use glib::subclass::prelude::*;
5use glib::translate::*;
6
7use super::button::ButtonImpl;
8use crate::{ToggleButton, ffi};
9
10pub trait ToggleButtonImpl: ToggleButtonImplExt + ButtonImpl {
11    /// Emits the [`toggled`][struct@crate::ToggleButton#toggled] signal on the
12    /// [`ToggleButton`][crate::ToggleButton]. There is no good reason for an
13    /// application ever to call this function.
14    fn toggled(&self) {
15        self.parent_toggled()
16    }
17}
18
19mod sealed {
20    pub trait Sealed {}
21    impl<T: super::ToggleButtonImpl> Sealed for T {}
22}
23
24pub trait ToggleButtonImplExt: ObjectSubclass + sealed::Sealed {
25    fn parent_toggled(&self) {
26        unsafe {
27            let data = Self::type_data();
28            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkToggleButtonClass;
29            if let Some(f) = (*parent_class).toggled {
30                f(self
31                    .obj()
32                    .unsafe_cast_ref::<ToggleButton>()
33                    .to_glib_none()
34                    .0)
35            }
36        }
37    }
38}
39
40impl<T: ToggleButtonImpl> ToggleButtonImplExt for T {}
41
42unsafe impl<T: ToggleButtonImpl> IsSubclassable<T> for ToggleButton {
43    fn class_init(class: &mut glib::Class<Self>) {
44        Self::parent_class_init::<T>(class);
45
46        let klass = class.as_mut();
47        klass.toggled = Some(button_toggled::<T>);
48    }
49}
50
51unsafe extern "C" fn button_toggled<T: ToggleButtonImpl>(ptr: *mut ffi::GtkToggleButton) {
52    unsafe {
53        let instance = &*(ptr as *mut T::Instance);
54        let imp = instance.imp();
55
56        imp.toggled()
57    }
58}
gtk/subclass/toggle_button.rs

gtk/subclass/
toggle_button.rs
