gtk4/subclass/
button.rs

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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`].
5
6use glib::translate::*;
7
8use crate::{ffi, prelude::*, subclass::prelude::*, Actionable, Button};
9
10pub trait ButtonImpl: WidgetImpl + ObjectSubclass<Type: IsA<Button> + IsA<Actionable>> {
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
24pub trait ButtonImplExt: ButtonImpl {
25    fn parent_activate(&self) {
26        unsafe {
27            let data = Self::type_data();
28            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkButtonClass;
29            if let Some(f) = (*parent_class).activate {
30                f(self.obj().unsafe_cast_ref::<Button>().to_glib_none().0)
31            }
32        }
33    }
34
35    fn parent_clicked(&self) {
36        unsafe {
37            let data = Self::type_data();
38            let parent_class = data.as_ref().parent_class() as *mut ffi::GtkButtonClass;
39            if let Some(f) = (*parent_class).clicked {
40                f(self.obj().unsafe_cast_ref::<Button>().to_glib_none().0)
41            }
42        }
43    }
44}
45impl<T: ButtonImpl> ButtonImplExt for T {}
46
47unsafe impl<T: ButtonImpl> IsSubclassable<T> for Button {
48    fn class_init(class: &mut glib::Class<Self>) {
49        Self::parent_class_init::<T>(class);
50
51        let klass = class.as_mut();
52        klass.activate = Some(button_activate::<T>);
53        klass.clicked = Some(button_clicked::<T>);
54    }
55}
56
57unsafe extern "C" fn button_activate<T: ButtonImpl>(ptr: *mut ffi::GtkButton) {
58    let instance = &*(ptr as *mut T::Instance);
59    let imp = instance.imp();
60
61    imp.activate()
62}
63
64unsafe extern "C" fn button_clicked<T: ButtonImpl>(ptr: *mut ffi::GtkButton) {
65    let instance = &*(ptr as *mut T::Instance);
66    let imp = instance.imp();
67
68    imp.clicked()
69}
gtk4/subclass/button.rs

gtk4/subclass/
button.rs
