// This file was generated by gir (https://github.com/gtk-rs/gir)
// from
// from gir-files (https://github.com/gtk-rs/gir-files.git)
// DO NOT EDIT

use crate::{ffi, Bin};
use glib::{
    prelude::*,
    signal::{connect_raw, SignalHandlerId},
    translate::*,
};
use std::boxed::Box as Box_;

glib::wrapper! {
    /// <para>A WelcomeScreen is a screen that presents options and actions before displaying the main application.</para>
    ///
    /// ## Properties
    ///
    ///
    /// #### `appname`
    ///  <para>The name of the application.</para>
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `description`
    ///  <para>The application description.</para>
    ///
    /// Readable | Writeable
    /// <details><summary><h4>Bin</h4></summary>
    ///
    ///
    /// #### `child`
    ///  Readable | Writeable
    /// </details>
    /// <details><summary><h4>Widget</h4></summary>
    ///
    ///
    /// #### `can-focus`
    ///  Whether the widget or any of its descendents can accept
    /// the input focus.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `can-target`
    ///  Whether the widget can receive pointer events.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `css-classes`
    ///  A list of css classes applied to this widget.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `css-name`
    ///  The name of this widget in the CSS tree.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    ///
    /// Readable | Writeable | Construct Only
    ///
    ///
    /// #### `cursor`
    ///  The cursor used by @widget.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `focus-on-click`
    ///  Whether the widget should grab focus when it is clicked with the mouse.
    ///
    /// This property is only relevant for widgets that can take focus.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `focusable`
    ///  Whether this widget itself will accept the input focus.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `halign`
    ///  How to distribute horizontal space if widget gets extra space.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `has-default`
    ///  Whether the widget is the default widget.
    ///
    /// Readable
    ///
    ///
    /// #### `has-focus`
    ///  Whether the widget has the input focus.
    ///
    /// Readable
    ///
    ///
    /// #### `has-tooltip`
    ///  Enables or disables the emission of the ::query-tooltip signal on @widget.
    ///
    /// A value of [`true`] indicates that @widget can have a tooltip, in this case
    /// the widget will be queried using [`query-tooltip`][struct@crate::gtk::Widget#query-tooltip] to
    /// determine whether it will provide a tooltip or not.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `height-request`
    ///  Override for height request of the widget.
    ///
    /// If this is -1, the natural request will be used.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `hexpand`
    ///  Whether to expand horizontally.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `hexpand-set`
    ///  Whether to use the `hexpand` property.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `layout-manager`
    ///  The `GtkLayoutManager` instance to use to compute the preferred size
    /// of the widget, and allocate its children.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `margin-bottom`
    ///  Margin on bottom side of widget.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExtManual::set_size_request()`][crate::gtk::prelude::WidgetExtManual::set_size_request()] for example.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `margin-end`
    ///  Margin on end of widget, horizontally.
    ///
    /// This property supports left-to-right and right-to-left text
    /// directions.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExtManual::set_size_request()`][crate::gtk::prelude::WidgetExtManual::set_size_request()] for example.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `margin-start`
    ///  Margin on start of widget, horizontally.
    ///
    /// This property supports left-to-right and right-to-left text
    /// directions.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExtManual::set_size_request()`][crate::gtk::prelude::WidgetExtManual::set_size_request()] for example.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `margin-top`
    ///  Margin on top side of widget.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExtManual::set_size_request()`][crate::gtk::prelude::WidgetExtManual::set_size_request()] for example.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `name`
    ///  The name of the widget.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `opacity`
    ///  The requested opacity of the widget.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `overflow`
    ///  How content outside the widget's content area is treated.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `parent`
    ///  The parent widget of this widget.
    ///
    /// Readable
    ///
    ///
    /// #### `receives-default`
    ///  Whether the widget will receive the default action when it is focused.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `root`
    ///  The [`gtk::Root`][crate::gtk::Root] widget of the widget tree containing this widget.
    ///
    /// This will be [`None`] if the widget is not contained in a root widget.
    ///
    /// Readable
    ///
    ///
    /// #### `scale-factor`
    ///  The scale factor of the widget.
    ///
    /// Readable
    ///
    ///
    /// #### `sensitive`
    ///  Whether the widget responds to input.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `tooltip-markup`
    ///  Sets the text of tooltip to be the given string, which is marked up
    /// with Pango markup.
    ///
    /// Also see `Gtk::Tooltip::set_markup()`.
    ///
    /// This is a convenience property which will take care of getting the
    /// tooltip shown if the given string is not [`None`]:
    /// [`has-tooltip`][struct@crate::gtk::Widget#has-tooltip] will automatically be set to [`true`]
    /// and there will be taken care of [`query-tooltip`][struct@crate::gtk::Widget#query-tooltip] in
    /// the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::gtk::Widget#tooltip-text] and
    /// [`tooltip-markup`][struct@crate::gtk::Widget#tooltip-markup] are set, the last one wins.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `tooltip-text`
    ///  Sets the text of tooltip to be the given string.
    ///
    /// Also see `Gtk::Tooltip::set_text()`.
    ///
    /// This is a convenience property which will take care of getting the
    /// tooltip shown if the given string is not [`None`]:
    /// [`has-tooltip`][struct@crate::gtk::Widget#has-tooltip] will automatically be set to [`true`]
    /// and there will be taken care of [`query-tooltip`][struct@crate::gtk::Widget#query-tooltip] in
    /// the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::gtk::Widget#tooltip-text] and
    /// [`tooltip-markup`][struct@crate::gtk::Widget#tooltip-markup] are set, the last one wins.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `valign`
    ///  How to distribute vertical space if widget gets extra space.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `vexpand`
    ///  Whether to expand vertically.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `vexpand-set`
    ///  Whether to use the `vexpand` property.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `visible`
    ///  Whether the widget is visible.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `width-request`
    ///  Override for width request of the widget.
    ///
    /// If this is -1, the natural request will be used.
    ///
    /// Readable | Writeable
    /// </details>
    /// <details><summary><h4>Accessible</h4></summary>
    ///
    ///
    /// #### `accessible-role`
    ///  The accessible role of the given [`gtk::Accessible`][crate::gtk::Accessible] implementation.
    ///
    /// The accessible role cannot be changed once set.
    ///
    /// Readable | Writeable
    /// </details>
    ///
    /// # Implements
    ///
    /// [`WelcomeScreenExt`][trait@crate::prelude::WelcomeScreenExt], [`BinExt`][trait@crate::prelude::BinExt], [`trait@gtk::prelude::WidgetExt`], [`trait@glib::ObjectExt`], [`trait@gtk::prelude::AccessibleExt`], [`trait@gtk::prelude::BuildableExt`], [`trait@gtk::prelude::ConstraintTargetExt`]
    #[doc(alias = "HeWelcomeScreen")]
    pub struct WelcomeScreen(Object<ffi::HeWelcomeScreen, ffi::HeWelcomeScreenClass>) @extends Bin, gtk::Widget, @implements gtk::Accessible, gtk::Buildable, gtk::ConstraintTarget;

    match fn {
        type_ => || ffi::he_welcome_screen_get_type(),
    }
}

impl WelcomeScreen {
    pub const NONE: Option<&'static WelcomeScreen> = None;

    /// <para>Construct a new WelcomeScreen.</para>
    ///
    /// Since: 1.0
    /// ## `appname`
    /// <para>The name of the application. </para>
    /// ## `description`
    /// <para>The application description. </para>
    #[doc(alias = "he_welcome_screen_new")]
    pub fn new(appname: &str, description: &str) -> WelcomeScreen {
        assert_initialized_main_thread!();
        unsafe {
            from_glib_none(ffi::he_welcome_screen_new(
                appname.to_glib_none().0,
                description.to_glib_none().0,
            ))
        }
    }

    // rustdoc-stripper-ignore-next
    /// Creates a new builder-pattern struct instance to construct [`WelcomeScreen`] objects.
    ///
    /// This method returns an instance of [`WelcomeScreenBuilder`](crate::builders::WelcomeScreenBuilder) which can be used to create [`WelcomeScreen`] objects.
    pub fn builder() -> WelcomeScreenBuilder {
        WelcomeScreenBuilder::new()
    }
}

impl Default for WelcomeScreen {
    fn default() -> Self {
        glib::object::Object::new::<Self>()
    }
}

// rustdoc-stripper-ignore-next
/// A [builder-pattern] type to construct [`WelcomeScreen`] objects.
///
/// [builder-pattern]: https://doc.rust-lang.org/1.0.0/style/ownership/builders.html
#[must_use = "The builder must be built to be used"]
pub struct WelcomeScreenBuilder {
    builder: glib::object::ObjectBuilder<'static, WelcomeScreen>,
}

impl WelcomeScreenBuilder {
    fn new() -> Self {
        Self {
            builder: glib::object::Object::builder(),
        }
    }

    /// <para>The name of the application.</para>
    pub fn appname(self, appname: impl Into<glib::GString>) -> Self {
        Self {
            builder: self.builder.property("appname", appname.into()),
        }
    }

    /// <para>The application description.</para>
    pub fn description(self, description: impl Into<glib::GString>) -> Self {
        Self {
            builder: self.builder.property("description", description.into()),
        }
    }

    pub fn child(self, child: &impl IsA<gtk::Widget>) -> Self {
        Self {
            builder: self.builder.property("child", child.clone().upcast()),
        }
    }

    /// Whether the widget or any of its descendents can accept
    /// the input focus.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    pub fn can_focus(self, can_focus: bool) -> Self {
        Self {
            builder: self.builder.property("can-focus", can_focus),
        }
    }

    /// Whether the widget can receive pointer events.
    pub fn can_target(self, can_target: bool) -> Self {
        Self {
            builder: self.builder.property("can-target", can_target),
        }
    }

    /// A list of css classes applied to this widget.
    pub fn css_classes(self, css_classes: impl Into<glib::StrV>) -> Self {
        Self {
            builder: self.builder.property("css-classes", css_classes.into()),
        }
    }

    /// The name of this widget in the CSS tree.
    ///
    /// This property is meant to be set by widget implementations,
    /// typically in their instance init function.
    pub fn css_name(self, css_name: impl Into<glib::GString>) -> Self {
        Self {
            builder: self.builder.property("css-name", css_name.into()),
        }
    }

    //pub fn cursor(self, cursor: /*Ignored*/&gdk::Cursor) -> Self {
    //    Self { builder: self.builder.property("cursor", cursor), }
    //}

    /// Whether the widget should grab focus when it is clicked with the mouse.
    ///
    /// This property is only relevant for widgets that can take focus.
    pub fn focus_on_click(self, focus_on_click: bool) -> Self {
        Self {
            builder: self.builder.property("focus-on-click", focus_on_click),
        }
    }

    /// Whether this widget itself will accept the input focus.
    pub fn focusable(self, focusable: bool) -> Self {
        Self {
            builder: self.builder.property("focusable", focusable),
        }
    }

    /// How to distribute horizontal space if widget gets extra space.
    pub fn halign(self, halign: gtk::Align) -> Self {
        Self {
            builder: self.builder.property("halign", halign),
        }
    }

    /// Enables or disables the emission of the ::query-tooltip signal on @widget.
    ///
    /// A value of [`true`] indicates that @widget can have a tooltip, in this case
    /// the widget will be queried using [`query-tooltip`][struct@crate::gtk::Widget#query-tooltip] to
    /// determine whether it will provide a tooltip or not.
    pub fn has_tooltip(self, has_tooltip: bool) -> Self {
        Self {
            builder: self.builder.property("has-tooltip", has_tooltip),
        }
    }

    /// Override for height request of the widget.
    ///
    /// If this is -1, the natural request will be used.
    pub fn height_request(self, height_request: i32) -> Self {
        Self {
            builder: self.builder.property("height-request", height_request),
        }
    }

    /// Whether to expand horizontally.
    pub fn hexpand(self, hexpand: bool) -> Self {
        Self {
            builder: self.builder.property("hexpand", hexpand),
        }
    }

    /// Whether to use the `hexpand` property.
    pub fn hexpand_set(self, hexpand_set: bool) -> Self {
        Self {
            builder: self.builder.property("hexpand-set", hexpand_set),
        }
    }

    //pub fn layout_manager(self, layout_manager: &impl IsA</*Ignored*/gtk::LayoutManager>) -> Self {
    //    Self { builder: self.builder.property("layout-manager", layout_manager.clone().upcast()), }
    //}

    /// Margin on bottom side of widget.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExtManual::set_size_request()`][crate::gtk::prelude::WidgetExtManual::set_size_request()] for example.
    pub fn margin_bottom(self, margin_bottom: i32) -> Self {
        Self {
            builder: self.builder.property("margin-bottom", margin_bottom),
        }
    }

    /// Margin on end of widget, horizontally.
    ///
    /// This property supports left-to-right and right-to-left text
    /// directions.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExtManual::set_size_request()`][crate::gtk::prelude::WidgetExtManual::set_size_request()] for example.
    pub fn margin_end(self, margin_end: i32) -> Self {
        Self {
            builder: self.builder.property("margin-end", margin_end),
        }
    }

    /// Margin on start of widget, horizontally.
    ///
    /// This property supports left-to-right and right-to-left text
    /// directions.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExtManual::set_size_request()`][crate::gtk::prelude::WidgetExtManual::set_size_request()] for example.
    pub fn margin_start(self, margin_start: i32) -> Self {
        Self {
            builder: self.builder.property("margin-start", margin_start),
        }
    }

    /// Margin on top side of widget.
    ///
    /// This property adds margin outside of the widget's normal size
    /// request, the margin will be added in addition to the size from
    /// [`WidgetExtManual::set_size_request()`][crate::gtk::prelude::WidgetExtManual::set_size_request()] for example.
    pub fn margin_top(self, margin_top: i32) -> Self {
        Self {
            builder: self.builder.property("margin-top", margin_top),
        }
    }

    /// The name of the widget.
    pub fn name(self, name: impl Into<glib::GString>) -> Self {
        Self {
            builder: self.builder.property("name", name.into()),
        }
    }

    /// The requested opacity of the widget.
    pub fn opacity(self, opacity: f64) -> Self {
        Self {
            builder: self.builder.property("opacity", opacity),
        }
    }

    //pub fn overflow(self, overflow: /*Ignored*/gtk::Overflow) -> Self {
    //    Self { builder: self.builder.property("overflow", overflow), }
    //}

    /// Whether the widget will receive the default action when it is focused.
    pub fn receives_default(self, receives_default: bool) -> Self {
        Self {
            builder: self.builder.property("receives-default", receives_default),
        }
    }

    /// Whether the widget responds to input.
    pub fn sensitive(self, sensitive: bool) -> Self {
        Self {
            builder: self.builder.property("sensitive", sensitive),
        }
    }

    /// Sets the text of tooltip to be the given string, which is marked up
    /// with Pango markup.
    ///
    /// Also see `Gtk::Tooltip::set_markup()`.
    ///
    /// This is a convenience property which will take care of getting the
    /// tooltip shown if the given string is not [`None`]:
    /// [`has-tooltip`][struct@crate::gtk::Widget#has-tooltip] will automatically be set to [`true`]
    /// and there will be taken care of [`query-tooltip`][struct@crate::gtk::Widget#query-tooltip] in
    /// the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::gtk::Widget#tooltip-text] and
    /// [`tooltip-markup`][struct@crate::gtk::Widget#tooltip-markup] are set, the last one wins.
    pub fn tooltip_markup(self, tooltip_markup: impl Into<glib::GString>) -> Self {
        Self {
            builder: self
                .builder
                .property("tooltip-markup", tooltip_markup.into()),
        }
    }

    /// Sets the text of tooltip to be the given string.
    ///
    /// Also see `Gtk::Tooltip::set_text()`.
    ///
    /// This is a convenience property which will take care of getting the
    /// tooltip shown if the given string is not [`None`]:
    /// [`has-tooltip`][struct@crate::gtk::Widget#has-tooltip] will automatically be set to [`true`]
    /// and there will be taken care of [`query-tooltip`][struct@crate::gtk::Widget#query-tooltip] in
    /// the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::gtk::Widget#tooltip-text] and
    /// [`tooltip-markup`][struct@crate::gtk::Widget#tooltip-markup] are set, the last one wins.
    pub fn tooltip_text(self, tooltip_text: impl Into<glib::GString>) -> Self {
        Self {
            builder: self.builder.property("tooltip-text", tooltip_text.into()),
        }
    }

    /// How to distribute vertical space if widget gets extra space.
    pub fn valign(self, valign: gtk::Align) -> Self {
        Self {
            builder: self.builder.property("valign", valign),
        }
    }

    /// Whether to expand vertically.
    pub fn vexpand(self, vexpand: bool) -> Self {
        Self {
            builder: self.builder.property("vexpand", vexpand),
        }
    }

    /// Whether to use the `vexpand` property.
    pub fn vexpand_set(self, vexpand_set: bool) -> Self {
        Self {
            builder: self.builder.property("vexpand-set", vexpand_set),
        }
    }

    /// Whether the widget is visible.
    pub fn visible(self, visible: bool) -> Self {
        Self {
            builder: self.builder.property("visible", visible),
        }
    }

    /// Override for width request of the widget.
    ///
    /// If this is -1, the natural request will be used.
    pub fn width_request(self, width_request: i32) -> Self {
        Self {
            builder: self.builder.property("width-request", width_request),
        }
    }

    //pub fn accessible_role(self, accessible_role: /*Ignored*/gtk::AccessibleRole) -> Self {
    //    Self { builder: self.builder.property("accessible-role", accessible_role), }
    //}

    // rustdoc-stripper-ignore-next
    /// Build the [`WelcomeScreen`].
    #[must_use = "Building the object from the builder is usually expensive and is not expected to have side effects"]
    pub fn build(self) -> WelcomeScreen {
        self.builder.build()
    }
}

mod sealed {
    pub trait Sealed {}
    impl<T: super::IsA<super::WelcomeScreen>> Sealed for T {}
}

/// Trait containing all [`struct@WelcomeScreen`] methods.
///
/// # Implementors
///
/// [`WelcomeScreen`][struct@crate::WelcomeScreen]
pub trait WelcomeScreenExt: IsA<WelcomeScreen> + sealed::Sealed + 'static {
    /// <para>Add a child to the welcome screen, should only be used in the context of a UI or Blueprint file. There should be no need to use this method in
    /// code.</para>
    #[doc(alias = "he_welcome_screen_add_child")]
    fn add_child(
        &self,
        builder: &gtk::Builder,
        child: &impl IsA<glib::Object>,
        type_: Option<&str>,
    ) {
        unsafe {
            ffi::he_welcome_screen_add_child(
                self.as_ref().to_glib_none().0,
                builder.to_glib_none().0,
                child.as_ref().to_glib_none().0,
                type_.to_glib_none().0,
            );
        }
    }

    #[doc(alias = "he_welcome_screen_get_appname")]
    #[doc(alias = "get_appname")]
    fn appname(&self) -> glib::GString {
        unsafe {
            from_glib_none(ffi::he_welcome_screen_get_appname(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    #[doc(alias = "he_welcome_screen_set_appname")]
    fn set_appname(&self, value: &str) {
        unsafe {
            ffi::he_welcome_screen_set_appname(
                self.as_ref().to_glib_none().0,
                value.to_glib_none().0,
            );
        }
    }

    #[doc(alias = "he_welcome_screen_get_description")]
    #[doc(alias = "get_description")]
    fn description(&self) -> glib::GString {
        unsafe {
            from_glib_none(ffi::he_welcome_screen_get_description(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    #[doc(alias = "he_welcome_screen_set_description")]
    fn set_description(&self, value: &str) {
        unsafe {
            ffi::he_welcome_screen_set_description(
                self.as_ref().to_glib_none().0,
                value.to_glib_none().0,
            );
        }
    }

    #[doc(alias = "appname")]
    fn connect_appname_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_appname_trampoline<
            P: IsA<WelcomeScreen>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::HeWelcomeScreen,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(WelcomeScreen::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::appname\0".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_appname_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "description")]
    fn connect_description_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_description_trampoline<
            P: IsA<WelcomeScreen>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::HeWelcomeScreen,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(WelcomeScreen::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::description\0".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_description_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

impl<O: IsA<WelcomeScreen>> WelcomeScreenExt for O {}