gtk/subclass/
button.rs

1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use glib::subclass::prelude::*;
4use glib::translate::*;
5use glib::Cast;
6
7use super::bin::BinImpl;
8use crate::Button;
9
10pub trait ButtonImpl: ButtonImplExt + BinImpl {
11    fn activate(&self) {
12        self.parent_activate()
13    }
14
15    /// Emits a [`clicked`][struct@crate::Button#clicked] signal to the given [`Button`][crate::Button].
16    fn clicked(&self) {
17        self.parent_clicked()
18    }
19}
20
21mod sealed {
22    pub trait Sealed {}
23    impl<T: super::ButtonImpl> Sealed for T {}
24}
25
26pub trait ButtonImplExt: ObjectSubclass + sealed::Sealed {
27    fn parent_activate(&self) {
28        unsafe {
29            let data = Self::type_data();
30            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkButtonClass;
31            if let Some(f) = (*parent_class).activate {
32                f(self.obj().unsafe_cast_ref::<Button>().to_glib_none().0)
33            }
34        }
35    }
36    fn parent_clicked(&self) {
37        unsafe {
38            let data = Self::type_data();
39            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkButtonClass;
40            if let Some(f) = (*parent_class).clicked {
41                f(self.obj().unsafe_cast_ref::<Button>().to_glib_none().0)
42            }
43        }
44    }
45}
46
47impl<T: ButtonImpl> ButtonImplExt for T {}
48
49unsafe impl<T: ButtonImpl> IsSubclassable<T> for Button {
50    fn class_init(class: &mut glib::Class<Self>) {
51        Self::parent_class_init::<T>(class);
52
53        if !crate::rt::is_initialized() {
54            panic!("GTK has to be initialized first");
55        }
56
57        let klass = class.as_mut();
58        klass.activate = Some(button_activate::<T>);
59        klass.clicked = Some(button_clicked::<T>);
60    }
61}
62
63unsafe extern "C" fn button_activate<T: ButtonImpl>(ptr: *mut ffi::GtkButton) {
64    let instance = &*(ptr as *mut T::Instance);
65    let imp = instance.imp();
66
67    imp.activate()
68}
69
70unsafe extern "C" fn button_clicked<T: ButtonImpl>(ptr: *mut ffi::GtkButton) {
71    let instance = &*(ptr as *mut T::Instance);
72    let imp = instance.imp();
73
74    imp.clicked()
75}
gtk/subclass/button.rs

gtk/subclass/
button.rs
