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

gtk/subclass/
toggle_button.rs
