gtk4/subclass/button.rs
1// Take a look at the license at the top of the repository in the LICENSE file.
2
3// rustdoc-stripper-ignore-next
4//! Traits intended for subclassing [`Button`](crate::Button).
5
6use glib::translate::*;
7
8use crate::{ffi, prelude::*, subclass::prelude::*, Button};
9
10pub trait ButtonImpl: ButtonImplExt + WidgetImpl {
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 /// Signal emitted when the button has been activated (pressed and released).
19 fn clicked(&self) {
20 self.parent_clicked()
21 }
22}
23
24mod sealed {
25 pub trait Sealed {}
26 impl<T: super::ButtonImplExt> Sealed for T {}
27}
28
29pub trait ButtonImplExt: sealed::Sealed + ObjectSubclass {
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
40 fn parent_clicked(&self) {
41 unsafe {
42 let data = Self::type_data();
43 let parent_class = data.as_ref().parent_class() as *mut ffi::GtkButtonClass;
44 if let Some(f) = (*parent_class).clicked {
45 f(self.obj().unsafe_cast_ref::<Button>().to_glib_none().0)
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 let klass = class.as_mut();
57 klass.activate = Some(button_activate::<T>);
58 klass.clicked = Some(button_clicked::<T>);
59 }
60}
61
62unsafe extern "C" fn button_activate<T: ButtonImpl>(ptr: *mut ffi::GtkButton) {
63 let instance = &*(ptr as *mut T::Instance);
64 let imp = instance.imp();
65
66 imp.activate()
67}
68
69unsafe extern "C" fn button_clicked<T: ButtonImpl>(ptr: *mut ffi::GtkButton) {
70 let instance = &*(ptr as *mut T::Instance);
71 let imp = instance.imp();
72
73 imp.clicked()
74}