gtk/subclass/
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::bin::BinImpl;
8use crate::{Button, ffi};
9
10pub trait ButtonImpl: ButtonImplExt + BinImpl {
11    /// Signal that causes the button to animate press then
12    ///  release. Applications should never connect to this signal, but use
13    ///  the `clicked` signal.
14    fn activate(&self) {
15        self.parent_activate()
16    }
17
18    /// Emits a [`clicked`][struct@crate::Button#clicked] signal to the given [`Button`][crate::Button].
19    fn clicked(&self) {
20        self.parent_clicked()
21    }
22}
23
24mod sealed {
25    pub trait Sealed {}
26    impl<T: super::ButtonImpl> Sealed for T {}
27}
28
29pub trait ButtonImplExt: ObjectSubclass + sealed::Sealed {
30    fn parent_activate(&self) {
31        unsafe {
32            let data = Self::type_data();
33            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkButtonClass;
34            if let Some(f) = (*parent_class).activate {
35                f(self.obj().unsafe_cast_ref::<Button>().to_glib_none().0)
36            }
37        }
38    }
39    fn parent_clicked(&self) {
40        unsafe {
41            let data = Self::type_data();
42            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkButtonClass;
43            if let Some(f) = (*parent_class).clicked {
44                f(self.obj().unsafe_cast_ref::<Button>().to_glib_none().0)
45            }
46        }
47    }
48}
49
50impl<T: ButtonImpl> ButtonImplExt for T {}
51
52unsafe impl<T: ButtonImpl> IsSubclassable<T> for Button {
53    fn class_init(class: &mut glib::Class<Self>) {
54        Self::parent_class_init::<T>(class);
55
56        if !crate::rt::is_initialized() {
57            panic!("GTK has to be initialized first");
58        }
59
60        let klass = class.as_mut();
61        klass.activate = Some(button_activate::<T>);
62        klass.clicked = Some(button_clicked::<T>);
63    }
64}
65
66unsafe extern "C" fn button_activate<T: ButtonImpl>(ptr: *mut ffi::GtkButton) {
67    unsafe {
68        let instance = &*(ptr as *mut T::Instance);
69        let imp = instance.imp();
70
71        imp.activate()
72    }
73}
74
75unsafe extern "C" fn button_clicked<T: ButtonImpl>(ptr: *mut ffi::GtkButton) {
76    unsafe {
77        let instance = &*(ptr as *mut T::Instance);
78        let imp = instance.imp();
79
80        imp.clicked()
81    }
82}
gtk/subclass/button.rs

gtk/subclass/
button.rs
