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

use crate::Align;
use crate::BaselinePosition;
use crate::Buildable;
use crate::Container;
use crate::Orientable;
use crate::Orientation;
use crate::PackType;
use crate::ResizeMode;
use crate::Widget;
use glib::object::Cast;
use glib::object::IsA;
use glib::signal::connect_raw;
use glib::signal::SignalHandlerId;
use glib::translate::*;
use glib::StaticType;
use glib::ToValue;
use std::boxed::Box as Box_;
use std::fmt;
use std::mem;
use std::mem::transmute;

glib::wrapper! {
    /// The GtkBox widget arranges child widgets into a single row or column,
    /// depending upon the value of its `property::Orientable::orientation` property. Within
    /// the other dimension, all children are allocated the same size. Of course,
    /// the `property::Widget::halign` and `property::Widget::valign` properties can be used on
    /// the children to influence their allocation.
    ///
    /// GtkBox uses a notion of packing. Packing refers
    /// to adding widgets with reference to a particular position in a
    /// [`Container`][crate::Container]. For a GtkBox, there are two reference positions: the
    /// start and the end of the box.
    /// For a vertical [`Box`][crate::Box], the start is defined as the top of the box and
    /// the end is defined as the bottom. For a horizontal [`Box`][crate::Box] the start
    /// is defined as the left side and the end is defined as the right side.
    ///
    /// Use repeated calls to [`BoxExt::pack_start()`][crate::prelude::BoxExt::pack_start()] to pack widgets into a
    /// GtkBox from start to end. Use [`BoxExt::pack_end()`][crate::prelude::BoxExt::pack_end()] to add widgets from
    /// end to start. You may intersperse these calls and add widgets from
    /// both ends of the same GtkBox.
    ///
    /// Because GtkBox is a [`Container`][crate::Container], you may also use [`ContainerExt::add()`][crate::prelude::ContainerExt::add()]
    /// to insert widgets into the box, and they will be packed with the default
    /// values for expand and fill child properties. Use [`ContainerExt::remove()`][crate::prelude::ContainerExt::remove()]
    /// to remove widgets from the GtkBox.
    ///
    /// Use [`BoxExt::set_homogeneous()`][crate::prelude::BoxExt::set_homogeneous()] to specify whether or not all children
    /// of the GtkBox are forced to get the same amount of space.
    ///
    /// Use [`BoxExt::set_spacing()`][crate::prelude::BoxExt::set_spacing()] to determine how much space will be
    /// minimally placed between all children in the GtkBox. Note that
    /// spacing is added between the children, while
    /// padding added by [`BoxExt::pack_start()`][crate::prelude::BoxExt::pack_start()] or [`BoxExt::pack_end()`][crate::prelude::BoxExt::pack_end()] is added
    /// on either side of the widget it belongs to.
    ///
    /// Use [`BoxExt::reorder_child()`][crate::prelude::BoxExt::reorder_child()] to move a GtkBox child to a different
    /// place in the box.
    ///
    /// Use [`BoxExt::set_child_packing()`][crate::prelude::BoxExt::set_child_packing()] to reset the expand,
    /// fill and padding child properties.
    /// Use [`BoxExt::query_child_packing()`][crate::prelude::BoxExt::query_child_packing()] to query these fields.
    ///
    /// # CSS nodes
    ///
    /// GtkBox uses a single CSS node with name box.
    ///
    /// In horizontal orientation, the nodes of the children are always arranged
    /// from left to right. So :first-child will always select the leftmost child,
    /// regardless of text direction.
    ///
    /// # Implements
    ///
    /// [`BoxExt`][trait@crate::prelude::BoxExt], [`ContainerExt`][trait@crate::prelude::ContainerExt], [`WidgetExt`][trait@crate::prelude::WidgetExt], [`trait@glib::ObjectExt`], [`BuildableExt`][trait@crate::prelude::BuildableExt], [`OrientableExt`][trait@crate::prelude::OrientableExt], [`ContainerExtManual`][trait@crate::prelude::ContainerExtManual], [`WidgetExtManual`][trait@crate::prelude::WidgetExtManual], [`BuildableExtManual`][trait@crate::prelude::BuildableExtManual]
    #[doc(alias = "GtkBox")]
    pub struct Box(Object<ffi::GtkBox, ffi::GtkBoxClass>) @extends Container, Widget, @implements Buildable, Orientable;

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

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

    /// Creates a new [`Box`][crate::Box].
    /// ## `orientation`
    /// the box’s orientation.
    /// ## `spacing`
    /// the number of pixels to place by default between children.
    ///
    /// # Returns
    ///
    /// a new [`Box`][crate::Box].
    #[doc(alias = "gtk_box_new")]
    pub fn new(orientation: Orientation, spacing: i32) -> Box {
        assert_initialized_main_thread!();
        unsafe {
            Widget::from_glib_none(ffi::gtk_box_new(orientation.into_glib(), spacing)).unsafe_cast()
        }
    }

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

impl Default for Box {
    fn default() -> Self {
        glib::object::Object::new::<Self>(&[])
    }
}

#[derive(Clone, Default)]
// rustdoc-stripper-ignore-next
/// A [builder-pattern] type to construct [`Box`] 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 BoxBuilder {
    baseline_position: Option<BaselinePosition>,
    homogeneous: Option<bool>,
    spacing: Option<i32>,
    border_width: Option<u32>,
    child: Option<Widget>,
    resize_mode: Option<ResizeMode>,
    app_paintable: Option<bool>,
    can_default: Option<bool>,
    can_focus: Option<bool>,
    events: Option<gdk::EventMask>,
    expand: Option<bool>,
    focus_on_click: Option<bool>,
    halign: Option<Align>,
    has_default: Option<bool>,
    has_focus: Option<bool>,
    has_tooltip: Option<bool>,
    height_request: Option<i32>,
    hexpand: Option<bool>,
    hexpand_set: Option<bool>,
    is_focus: Option<bool>,
    margin: Option<i32>,
    margin_bottom: Option<i32>,
    margin_end: Option<i32>,
    margin_start: Option<i32>,
    margin_top: Option<i32>,
    name: Option<String>,
    no_show_all: Option<bool>,
    opacity: Option<f64>,
    parent: Option<Container>,
    receives_default: Option<bool>,
    sensitive: Option<bool>,
    tooltip_markup: Option<String>,
    tooltip_text: Option<String>,
    valign: Option<Align>,
    vexpand: Option<bool>,
    vexpand_set: Option<bool>,
    visible: Option<bool>,
    width_request: Option<i32>,
    orientation: Option<Orientation>,
}

impl BoxBuilder {
    // rustdoc-stripper-ignore-next
    /// Create a new [`BoxBuilder`].
    pub fn new() -> Self {
        Self::default()
    }

    // rustdoc-stripper-ignore-next
    /// Build the [`Box`].
    #[must_use = "Building the object from the builder is usually expensive and is not expected to have side effects"]
    pub fn build(self) -> Box {
        let mut properties: Vec<(&str, &dyn ToValue)> = vec![];
        if let Some(ref baseline_position) = self.baseline_position {
            properties.push(("baseline-position", baseline_position));
        }
        if let Some(ref homogeneous) = self.homogeneous {
            properties.push(("homogeneous", homogeneous));
        }
        if let Some(ref spacing) = self.spacing {
            properties.push(("spacing", spacing));
        }
        if let Some(ref border_width) = self.border_width {
            properties.push(("border-width", border_width));
        }
        if let Some(ref child) = self.child {
            properties.push(("child", child));
        }
        if let Some(ref resize_mode) = self.resize_mode {
            properties.push(("resize-mode", resize_mode));
        }
        if let Some(ref app_paintable) = self.app_paintable {
            properties.push(("app-paintable", app_paintable));
        }
        if let Some(ref can_default) = self.can_default {
            properties.push(("can-default", can_default));
        }
        if let Some(ref can_focus) = self.can_focus {
            properties.push(("can-focus", can_focus));
        }
        if let Some(ref events) = self.events {
            properties.push(("events", events));
        }
        if let Some(ref expand) = self.expand {
            properties.push(("expand", expand));
        }
        if let Some(ref focus_on_click) = self.focus_on_click {
            properties.push(("focus-on-click", focus_on_click));
        }
        if let Some(ref halign) = self.halign {
            properties.push(("halign", halign));
        }
        if let Some(ref has_default) = self.has_default {
            properties.push(("has-default", has_default));
        }
        if let Some(ref has_focus) = self.has_focus {
            properties.push(("has-focus", has_focus));
        }
        if let Some(ref has_tooltip) = self.has_tooltip {
            properties.push(("has-tooltip", has_tooltip));
        }
        if let Some(ref height_request) = self.height_request {
            properties.push(("height-request", height_request));
        }
        if let Some(ref hexpand) = self.hexpand {
            properties.push(("hexpand", hexpand));
        }
        if let Some(ref hexpand_set) = self.hexpand_set {
            properties.push(("hexpand-set", hexpand_set));
        }
        if let Some(ref is_focus) = self.is_focus {
            properties.push(("is-focus", is_focus));
        }
        if let Some(ref margin) = self.margin {
            properties.push(("margin", margin));
        }
        if let Some(ref margin_bottom) = self.margin_bottom {
            properties.push(("margin-bottom", margin_bottom));
        }
        if let Some(ref margin_end) = self.margin_end {
            properties.push(("margin-end", margin_end));
        }
        if let Some(ref margin_start) = self.margin_start {
            properties.push(("margin-start", margin_start));
        }
        if let Some(ref margin_top) = self.margin_top {
            properties.push(("margin-top", margin_top));
        }
        if let Some(ref name) = self.name {
            properties.push(("name", name));
        }
        if let Some(ref no_show_all) = self.no_show_all {
            properties.push(("no-show-all", no_show_all));
        }
        if let Some(ref opacity) = self.opacity {
            properties.push(("opacity", opacity));
        }
        if let Some(ref parent) = self.parent {
            properties.push(("parent", parent));
        }
        if let Some(ref receives_default) = self.receives_default {
            properties.push(("receives-default", receives_default));
        }
        if let Some(ref sensitive) = self.sensitive {
            properties.push(("sensitive", sensitive));
        }
        if let Some(ref tooltip_markup) = self.tooltip_markup {
            properties.push(("tooltip-markup", tooltip_markup));
        }
        if let Some(ref tooltip_text) = self.tooltip_text {
            properties.push(("tooltip-text", tooltip_text));
        }
        if let Some(ref valign) = self.valign {
            properties.push(("valign", valign));
        }
        if let Some(ref vexpand) = self.vexpand {
            properties.push(("vexpand", vexpand));
        }
        if let Some(ref vexpand_set) = self.vexpand_set {
            properties.push(("vexpand-set", vexpand_set));
        }
        if let Some(ref visible) = self.visible {
            properties.push(("visible", visible));
        }
        if let Some(ref width_request) = self.width_request {
            properties.push(("width-request", width_request));
        }
        if let Some(ref orientation) = self.orientation {
            properties.push(("orientation", orientation));
        }
        glib::Object::new::<Box>(&properties)
    }

    pub fn baseline_position(mut self, baseline_position: BaselinePosition) -> Self {
        self.baseline_position = Some(baseline_position);
        self
    }

    pub fn homogeneous(mut self, homogeneous: bool) -> Self {
        self.homogeneous = Some(homogeneous);
        self
    }

    pub fn spacing(mut self, spacing: i32) -> Self {
        self.spacing = Some(spacing);
        self
    }

    pub fn border_width(mut self, border_width: u32) -> Self {
        self.border_width = Some(border_width);
        self
    }

    pub fn child(mut self, child: &impl IsA<Widget>) -> Self {
        self.child = Some(child.clone().upcast());
        self
    }

    pub fn resize_mode(mut self, resize_mode: ResizeMode) -> Self {
        self.resize_mode = Some(resize_mode);
        self
    }

    pub fn app_paintable(mut self, app_paintable: bool) -> Self {
        self.app_paintable = Some(app_paintable);
        self
    }

    pub fn can_default(mut self, can_default: bool) -> Self {
        self.can_default = Some(can_default);
        self
    }

    pub fn can_focus(mut self, can_focus: bool) -> Self {
        self.can_focus = Some(can_focus);
        self
    }

    pub fn events(mut self, events: gdk::EventMask) -> Self {
        self.events = Some(events);
        self
    }

    /// Whether to expand in both directions. Setting this sets both `property::Widget::hexpand` and `property::Widget::vexpand`
    pub fn expand(mut self, expand: bool) -> Self {
        self.expand = Some(expand);
        self
    }

    /// Whether the widget should grab focus when it is clicked with the mouse.
    ///
    /// This property is only relevant for widgets that can take focus.
    ///
    /// Before 3.20, several widgets (GtkButton, GtkFileChooserButton,
    /// GtkComboBox) implemented this property individually.
    pub fn focus_on_click(mut self, focus_on_click: bool) -> Self {
        self.focus_on_click = Some(focus_on_click);
        self
    }

    /// How to distribute horizontal space if widget gets extra space, see [`Align`][crate::Align]
    pub fn halign(mut self, halign: Align) -> Self {
        self.halign = Some(halign);
        self
    }

    pub fn has_default(mut self, has_default: bool) -> Self {
        self.has_default = Some(has_default);
        self
    }

    pub fn has_focus(mut self, has_focus: bool) -> Self {
        self.has_focus = Some(has_focus);
        self
    }

    /// Enables or disables the emission of `signal::Widget::query-tooltip` on `widget`.
    /// A value of [`true`] indicates that `widget` can have a tooltip, in this case
    /// the widget will be queried using `signal::Widget::query-tooltip` to determine
    /// whether it will provide a tooltip or not.
    ///
    /// Note that setting this property to [`true`] for the first time will change
    /// the event masks of the GdkWindows of this widget to include leave-notify
    /// and motion-notify events. This cannot and will not be undone when the
    /// property is set to [`false`] again.
    pub fn has_tooltip(mut self, has_tooltip: bool) -> Self {
        self.has_tooltip = Some(has_tooltip);
        self
    }

    pub fn height_request(mut self, height_request: i32) -> Self {
        self.height_request = Some(height_request);
        self
    }

    /// Whether to expand horizontally. See [`WidgetExt::set_hexpand()`][crate::prelude::WidgetExt::set_hexpand()].
    pub fn hexpand(mut self, hexpand: bool) -> Self {
        self.hexpand = Some(hexpand);
        self
    }

    /// Whether to use the `property::Widget::hexpand` property. See [`WidgetExt::is_hexpand_set()`][crate::prelude::WidgetExt::is_hexpand_set()].
    pub fn hexpand_set(mut self, hexpand_set: bool) -> Self {
        self.hexpand_set = Some(hexpand_set);
        self
    }

    pub fn is_focus(mut self, is_focus: bool) -> Self {
        self.is_focus = Some(is_focus);
        self
    }

    /// Sets all four sides' margin at once. If read, returns max
    /// margin on any side.
    pub fn margin(mut self, margin: i32) -> Self {
        self.margin = Some(margin);
        self
    }

    /// 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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    pub fn margin_bottom(mut self, margin_bottom: i32) -> Self {
        self.margin_bottom = Some(margin_bottom);
        self
    }

    /// 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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    pub fn margin_end(mut self, margin_end: i32) -> Self {
        self.margin_end = Some(margin_end);
        self
    }

    /// 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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    pub fn margin_start(mut self, margin_start: i32) -> Self {
        self.margin_start = Some(margin_start);
        self
    }

    /// 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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::set_size_request()] for example.
    pub fn margin_top(mut self, margin_top: i32) -> Self {
        self.margin_top = Some(margin_top);
        self
    }

    pub fn name(mut self, name: &str) -> Self {
        self.name = Some(name.to_string());
        self
    }

    pub fn no_show_all(mut self, no_show_all: bool) -> Self {
        self.no_show_all = Some(no_show_all);
        self
    }

    /// The requested opacity of the widget. See [`WidgetExt::set_opacity()`][crate::prelude::WidgetExt::set_opacity()] for
    /// more details about window opacity.
    ///
    /// Before 3.8 this was only available in GtkWindow
    pub fn opacity(mut self, opacity: f64) -> Self {
        self.opacity = Some(opacity);
        self
    }

    pub fn parent(mut self, parent: &impl IsA<Container>) -> Self {
        self.parent = Some(parent.clone().upcast());
        self
    }

    pub fn receives_default(mut self, receives_default: bool) -> Self {
        self.receives_default = Some(receives_default);
        self
    }

    pub fn sensitive(mut self, sensitive: bool) -> Self {
        self.sensitive = Some(sensitive);
        self
    }

    /// Sets the text of tooltip to be the given string, which is marked up
    /// with the [Pango text markup language][PangoMarkupFormat].
    /// Also see [`Tooltip::set_markup()`][crate::Tooltip::set_markup()].
    ///
    /// This is a convenience property which will take care of getting the
    /// tooltip shown if the given string is not [`None`]: `property::Widget::has-tooltip`
    /// will automatically be set to [`true`] and there will be taken care of
    /// `signal::Widget::query-tooltip` in the default signal handler.
    ///
    /// Note that if both `property::Widget::tooltip-text` and `property::Widget::tooltip-markup`
    /// are set, the last one wins.
    pub fn tooltip_markup(mut self, tooltip_markup: &str) -> Self {
        self.tooltip_markup = Some(tooltip_markup.to_string());
        self
    }

    /// Sets the text of tooltip to be the given string.
    ///
    /// Also see [`Tooltip::set_text()`][crate::Tooltip::set_text()].
    ///
    /// This is a convenience property which will take care of getting the
    /// tooltip shown if the given string is not [`None`]: `property::Widget::has-tooltip`
    /// will automatically be set to [`true`] and there will be taken care of
    /// `signal::Widget::query-tooltip` in the default signal handler.
    ///
    /// Note that if both `property::Widget::tooltip-text` and `property::Widget::tooltip-markup`
    /// are set, the last one wins.
    pub fn tooltip_text(mut self, tooltip_text: &str) -> Self {
        self.tooltip_text = Some(tooltip_text.to_string());
        self
    }

    /// How to distribute vertical space if widget gets extra space, see [`Align`][crate::Align]
    pub fn valign(mut self, valign: Align) -> Self {
        self.valign = Some(valign);
        self
    }

    /// Whether to expand vertically. See [`WidgetExt::set_vexpand()`][crate::prelude::WidgetExt::set_vexpand()].
    pub fn vexpand(mut self, vexpand: bool) -> Self {
        self.vexpand = Some(vexpand);
        self
    }

    /// Whether to use the `property::Widget::vexpand` property. See [`WidgetExt::is_vexpand_set()`][crate::prelude::WidgetExt::is_vexpand_set()].
    pub fn vexpand_set(mut self, vexpand_set: bool) -> Self {
        self.vexpand_set = Some(vexpand_set);
        self
    }

    pub fn visible(mut self, visible: bool) -> Self {
        self.visible = Some(visible);
        self
    }

    pub fn width_request(mut self, width_request: i32) -> Self {
        self.width_request = Some(width_request);
        self
    }

    /// The orientation of the orientable.
    pub fn orientation(mut self, orientation: Orientation) -> Self {
        self.orientation = Some(orientation);
        self
    }
}

/// Trait containing all [`struct@Box`] methods.
///
/// # Implementors
///
/// [`AppChooserWidget`][struct@crate::AppChooserWidget], [`Box`][struct@crate::Box], [`ButtonBox`][struct@crate::ButtonBox], [`ColorChooserWidget`][struct@crate::ColorChooserWidget], [`FileChooserButton`][struct@crate::FileChooserButton], [`FileChooserWidget`][struct@crate::FileChooserWidget], [`FontChooserWidget`][struct@crate::FontChooserWidget], [`InfoBar`][struct@crate::InfoBar], [`RecentChooserWidget`][struct@crate::RecentChooserWidget], [`ShortcutLabel`][struct@crate::ShortcutLabel], [`ShortcutsGroup`][struct@crate::ShortcutsGroup], [`ShortcutsSection`][struct@crate::ShortcutsSection], [`ShortcutsShortcut`][struct@crate::ShortcutsShortcut], [`StackSwitcher`][struct@crate::StackSwitcher], [`Statusbar`][struct@crate::Statusbar]
pub trait BoxExt: 'static {
    /// Gets the value set by [`set_baseline_position()`][Self::set_baseline_position()].
    ///
    /// # Returns
    ///
    /// the baseline position
    #[doc(alias = "gtk_box_get_baseline_position")]
    #[doc(alias = "get_baseline_position")]
    fn baseline_position(&self) -> BaselinePosition;

    /// Retrieves the center widget of the box.
    ///
    /// # Returns
    ///
    /// the center widget
    ///  or [`None`] in case no center widget is set.
    #[doc(alias = "gtk_box_get_center_widget")]
    #[doc(alias = "get_center_widget")]
    fn center_widget(&self) -> Option<Widget>;

    /// Returns whether the box is homogeneous (all children are the
    /// same size). See [`set_homogeneous()`][Self::set_homogeneous()].
    ///
    /// # Returns
    ///
    /// [`true`] if the box is homogeneous.
    #[doc(alias = "gtk_box_get_homogeneous")]
    #[doc(alias = "get_homogeneous")]
    fn is_homogeneous(&self) -> bool;

    /// Gets the value set by [`set_spacing()`][Self::set_spacing()].
    ///
    /// # Returns
    ///
    /// spacing between children
    #[doc(alias = "gtk_box_get_spacing")]
    #[doc(alias = "get_spacing")]
    fn spacing(&self) -> i32;

    /// Adds `child` to `self`, packed with reference to the end of `self`.
    /// The `child` is packed after (away from end of) any other child
    /// packed with reference to the end of `self`.
    /// ## `child`
    /// the [`Widget`][crate::Widget] to be added to `self`
    /// ## `expand`
    /// [`true`] if the new child is to be given extra space allocated
    ///  to `self`. The extra space will be divided evenly between all children
    ///  of `self` that use this option
    /// ## `fill`
    /// [`true`] if space given to `child` by the `expand` option is
    ///  actually allocated to `child`, rather than just padding it. This
    ///  parameter has no effect if `expand` is set to [`false`]. A child is
    ///  always allocated the full height of a horizontal [`Box`][crate::Box] and the full width
    ///  of a vertical [`Box`][crate::Box]. This option affects the other dimension
    /// ## `padding`
    /// extra space in pixels to put between this child and its
    ///  neighbors, over and above the global amount specified by
    ///  `property::Box::spacing` property. If `child` is a widget at one of the
    ///  reference ends of `self`, then `padding` pixels are also put between
    ///  `child` and the reference edge of `self`
    #[doc(alias = "gtk_box_pack_end")]
    fn pack_end(&self, child: &impl IsA<Widget>, expand: bool, fill: bool, padding: u32);

    /// Adds `child` to `self`, packed with reference to the start of `self`.
    /// The `child` is packed after any other child packed with reference
    /// to the start of `self`.
    /// ## `child`
    /// the [`Widget`][crate::Widget] to be added to `self`
    /// ## `expand`
    /// [`true`] if the new child is to be given extra space allocated
    ///  to `self`. The extra space will be divided evenly between all children
    ///  that use this option
    /// ## `fill`
    /// [`true`] if space given to `child` by the `expand` option is
    ///  actually allocated to `child`, rather than just padding it. This
    ///  parameter has no effect if `expand` is set to [`false`]. A child is
    ///  always allocated the full height of a horizontal [`Box`][crate::Box] and the full width
    ///  of a vertical [`Box`][crate::Box]. This option affects the other dimension
    /// ## `padding`
    /// extra space in pixels to put between this child and its
    ///  neighbors, over and above the global amount specified by
    ///  `property::Box::spacing` property. If `child` is a widget at one of the
    ///  reference ends of `self`, then `padding` pixels are also put between
    ///  `child` and the reference edge of `self`
    #[doc(alias = "gtk_box_pack_start")]
    fn pack_start(&self, child: &impl IsA<Widget>, expand: bool, fill: bool, padding: u32);

    /// Obtains information about how `child` is packed into `self`.
    /// ## `child`
    /// the [`Widget`][crate::Widget] of the child to query
    ///
    /// # Returns
    ///
    ///
    /// ## `expand`
    /// pointer to return location for expand child
    ///  property
    ///
    /// ## `fill`
    /// pointer to return location for fill child
    ///  property
    ///
    /// ## `padding`
    /// pointer to return location for padding
    ///  child property
    ///
    /// ## `pack_type`
    /// pointer to return location for pack-type
    ///  child property
    #[doc(alias = "gtk_box_query_child_packing")]
    fn query_child_packing(&self, child: &impl IsA<Widget>) -> (bool, bool, u32, PackType);

    /// Moves `child` to a new `position` in the list of `self` children.
    /// The list contains widgets packed [`PackType::Start`][crate::PackType::Start]
    /// as well as widgets packed [`PackType::End`][crate::PackType::End], in the order that these
    /// widgets were added to `self`.
    ///
    /// A widget’s position in the `self` children list determines where
    /// the widget is packed into `self`. A child widget at some position
    /// in the list will be packed just after all other widgets of the
    /// same packing type that appear earlier in the list.
    /// ## `child`
    /// the [`Widget`][crate::Widget] to move
    /// ## `position`
    /// the new position for `child` in the list of children
    ///  of `self`, starting from 0. If negative, indicates the end of
    ///  the list
    #[doc(alias = "gtk_box_reorder_child")]
    fn reorder_child(&self, child: &impl IsA<Widget>, position: i32);

    /// Sets the baseline position of a box. This affects
    /// only horizontal boxes with at least one baseline aligned
    /// child. If there is more vertical space available than requested,
    /// and the baseline is not allocated by the parent then
    /// `position` is used to allocate the baseline wrt the
    /// extra space available.
    /// ## `position`
    /// a [`BaselinePosition`][crate::BaselinePosition]
    #[doc(alias = "gtk_box_set_baseline_position")]
    fn set_baseline_position(&self, position: BaselinePosition);

    /// Sets a center widget; that is a child widget that will be
    /// centered with respect to the full width of the box, even
    /// if the children at either side take up different amounts
    /// of space.
    /// ## `widget`
    /// the widget to center
    #[doc(alias = "gtk_box_set_center_widget")]
    fn set_center_widget(&self, widget: Option<&impl IsA<Widget>>);

    /// Sets the way `child` is packed into `self`.
    /// ## `child`
    /// the [`Widget`][crate::Widget] of the child to set
    /// ## `expand`
    /// the new value of the expand child property
    /// ## `fill`
    /// the new value of the fill child property
    /// ## `padding`
    /// the new value of the padding child property
    /// ## `pack_type`
    /// the new value of the pack-type child property
    #[doc(alias = "gtk_box_set_child_packing")]
    fn set_child_packing(
        &self,
        child: &impl IsA<Widget>,
        expand: bool,
        fill: bool,
        padding: u32,
        pack_type: PackType,
    );

    /// Sets the `property::Box::homogeneous` property of `self`, controlling
    /// whether or not all children of `self` are given equal space
    /// in the box.
    /// ## `homogeneous`
    /// a boolean value, [`true`] to create equal allotments,
    ///  [`false`] for variable allotments
    #[doc(alias = "gtk_box_set_homogeneous")]
    fn set_homogeneous(&self, homogeneous: bool);

    /// Sets the `property::Box::spacing` property of `self`, which is the
    /// number of pixels to place between children of `self`.
    /// ## `spacing`
    /// the number of pixels to put between children
    #[doc(alias = "gtk_box_set_spacing")]
    fn set_spacing(&self, spacing: i32);

    fn child_expands<T: IsA<crate::Widget>>(&self, item: &T) -> bool;

    fn set_child_expand<T: IsA<crate::Widget>>(&self, item: &T, expand: bool);

    fn child_fills<T: IsA<crate::Widget>>(&self, item: &T) -> bool;

    fn set_child_fill<T: IsA<crate::Widget>>(&self, item: &T, fill: bool);

    #[doc(alias = "child.pack-type")]
    fn child_pack_type<T: IsA<crate::Widget>>(&self, item: &T) -> PackType;

    #[doc(alias = "child.pack-type")]
    fn set_child_pack_type<T: IsA<crate::Widget>>(&self, item: &T, pack_type: PackType);

    fn child_padding<T: IsA<crate::Widget>>(&self, item: &T) -> u32;

    fn set_child_padding<T: IsA<crate::Widget>>(&self, item: &T, padding: u32);

    fn child_position<T: IsA<crate::Widget>>(&self, item: &T) -> i32;

    fn set_child_position<T: IsA<crate::Widget>>(&self, item: &T, position: i32);

    #[doc(alias = "baseline-position")]
    fn connect_baseline_position_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;

    #[doc(alias = "homogeneous")]
    fn connect_homogeneous_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;

    #[doc(alias = "spacing")]
    fn connect_spacing_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
}

impl<O: IsA<Box>> BoxExt for O {
    fn baseline_position(&self) -> BaselinePosition {
        unsafe {
            from_glib(ffi::gtk_box_get_baseline_position(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn center_widget(&self) -> Option<Widget> {
        unsafe {
            from_glib_none(ffi::gtk_box_get_center_widget(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn is_homogeneous(&self) -> bool {
        unsafe { from_glib(ffi::gtk_box_get_homogeneous(self.as_ref().to_glib_none().0)) }
    }

    fn spacing(&self) -> i32 {
        unsafe { ffi::gtk_box_get_spacing(self.as_ref().to_glib_none().0) }
    }

    fn pack_end(&self, child: &impl IsA<Widget>, expand: bool, fill: bool, padding: u32) {
        unsafe {
            ffi::gtk_box_pack_end(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                expand.into_glib(),
                fill.into_glib(),
                padding,
            );
        }
    }

    fn pack_start(&self, child: &impl IsA<Widget>, expand: bool, fill: bool, padding: u32) {
        unsafe {
            ffi::gtk_box_pack_start(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                expand.into_glib(),
                fill.into_glib(),
                padding,
            );
        }
    }

    fn query_child_packing(&self, child: &impl IsA<Widget>) -> (bool, bool, u32, PackType) {
        unsafe {
            let mut expand = mem::MaybeUninit::uninit();
            let mut fill = mem::MaybeUninit::uninit();
            let mut padding = mem::MaybeUninit::uninit();
            let mut pack_type = mem::MaybeUninit::uninit();
            ffi::gtk_box_query_child_packing(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                expand.as_mut_ptr(),
                fill.as_mut_ptr(),
                padding.as_mut_ptr(),
                pack_type.as_mut_ptr(),
            );
            (
                from_glib(expand.assume_init()),
                from_glib(fill.assume_init()),
                padding.assume_init(),
                from_glib(pack_type.assume_init()),
            )
        }
    }

    fn reorder_child(&self, child: &impl IsA<Widget>, position: i32) {
        unsafe {
            ffi::gtk_box_reorder_child(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                position,
            );
        }
    }

    fn set_baseline_position(&self, position: BaselinePosition) {
        unsafe {
            ffi::gtk_box_set_baseline_position(
                self.as_ref().to_glib_none().0,
                position.into_glib(),
            );
        }
    }

    fn set_center_widget(&self, widget: Option<&impl IsA<Widget>>) {
        unsafe {
            ffi::gtk_box_set_center_widget(
                self.as_ref().to_glib_none().0,
                widget.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    fn set_child_packing(
        &self,
        child: &impl IsA<Widget>,
        expand: bool,
        fill: bool,
        padding: u32,
        pack_type: PackType,
    ) {
        unsafe {
            ffi::gtk_box_set_child_packing(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                expand.into_glib(),
                fill.into_glib(),
                padding,
                pack_type.into_glib(),
            );
        }
    }

    fn set_homogeneous(&self, homogeneous: bool) {
        unsafe {
            ffi::gtk_box_set_homogeneous(self.as_ref().to_glib_none().0, homogeneous.into_glib());
        }
    }

    fn set_spacing(&self, spacing: i32) {
        unsafe {
            ffi::gtk_box_set_spacing(self.as_ref().to_glib_none().0, spacing);
        }
    }

    fn child_expands<T: IsA<crate::Widget>>(&self, item: &T) -> bool {
        crate::prelude::ContainerExtManual::child_property(
            self.as_ref(),
            &item.clone().upcast(),
            "expand",
        )
    }

    fn set_child_expand<T: IsA<crate::Widget>>(&self, item: &T, expand: bool) {
        crate::prelude::ContainerExtManual::child_set_property(
            self.as_ref(),
            &item.clone().upcast(),
            "expand",
            &expand,
        )
    }

    fn child_fills<T: IsA<crate::Widget>>(&self, item: &T) -> bool {
        crate::prelude::ContainerExtManual::child_property(
            self.as_ref(),
            &item.clone().upcast(),
            "fill",
        )
    }

    fn set_child_fill<T: IsA<crate::Widget>>(&self, item: &T, fill: bool) {
        crate::prelude::ContainerExtManual::child_set_property(
            self.as_ref(),
            &item.clone().upcast(),
            "fill",
            &fill,
        )
    }

    fn child_pack_type<T: IsA<crate::Widget>>(&self, item: &T) -> PackType {
        crate::prelude::ContainerExtManual::child_property(
            self.as_ref(),
            &item.clone().upcast(),
            "pack-type",
        )
    }

    fn set_child_pack_type<T: IsA<crate::Widget>>(&self, item: &T, pack_type: PackType) {
        crate::prelude::ContainerExtManual::child_set_property(
            self.as_ref(),
            &item.clone().upcast(),
            "pack-type",
            &pack_type,
        )
    }

    fn child_padding<T: IsA<crate::Widget>>(&self, item: &T) -> u32 {
        crate::prelude::ContainerExtManual::child_property(
            self.as_ref(),
            &item.clone().upcast(),
            "padding",
        )
    }

    fn set_child_padding<T: IsA<crate::Widget>>(&self, item: &T, padding: u32) {
        crate::prelude::ContainerExtManual::child_set_property(
            self.as_ref(),
            &item.clone().upcast(),
            "padding",
            &padding,
        )
    }

    fn child_position<T: IsA<crate::Widget>>(&self, item: &T) -> i32 {
        crate::prelude::ContainerExtManual::child_property(
            self.as_ref(),
            &item.clone().upcast(),
            "position",
        )
    }

    fn set_child_position<T: IsA<crate::Widget>>(&self, item: &T, position: i32) {
        crate::prelude::ContainerExtManual::child_set_property(
            self.as_ref(),
            &item.clone().upcast(),
            "position",
            &position,
        )
    }

    fn connect_baseline_position_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_baseline_position_trampoline<
            P: IsA<Box>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkBox,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Box::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::baseline-position\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_baseline_position_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_homogeneous_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_homogeneous_trampoline<P: IsA<Box>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkBox,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Box::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::homogeneous\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_homogeneous_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn connect_spacing_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_spacing_trampoline<P: IsA<Box>, F: Fn(&P) + 'static>(
            this: *mut ffi::GtkBox,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(Box::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::spacing\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_spacing_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

impl fmt::Display for Box {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str("Box")
    }
}