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

use crate::Accessible;
use crate::AccessibleRole;
use crate::Align;
use crate::Buildable;
use crate::ConstraintTarget;
use crate::Expression;
use crate::LayoutManager;
use crate::ListItemFactory;
use crate::Overflow;
use crate::Widget;
use glib::object::Cast;
use glib::object::IsA;
use glib::object::ObjectType as ObjectType_;
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::transmute;

glib::wrapper! {
    /// [`DropDown`][crate::DropDown] is a widget that allows the user to choose an item
    /// from a list of options.
    ///
    /// ![An example GtkDropDown](drop-down.png)
    ///
    /// The [`DropDown`][crate::DropDown] displays the selected choice.
    ///
    /// The options are given to [`DropDown`][crate::DropDown] in the form of `GListModel`
    /// and how the individual options are represented is determined by
    /// a [`ListItemFactory`][crate::ListItemFactory]. The default factory displays simple strings.
    ///
    /// [`DropDown`][crate::DropDown] knows how to obtain strings from the items in a
    /// [`StringList`][crate::StringList]; for other models, you have to provide an expression
    /// to find the strings via [``set_expression()``][`Self::set_expression()`].
    ///
    /// [`DropDown`][crate::DropDown] can optionally allow search in the popup, which is
    /// useful if the list of options is long. To enable the search entry,
    /// use [``set_enable_search()``][`Self::set_enable_search()`].
    ///
    /// # CSS nodes
    ///
    /// [`DropDown`][crate::DropDown] has a single CSS node with name dropdown,
    /// with the button and popover nodes as children.
    ///
    /// # Accessibility
    ///
    /// [`DropDown`][crate::DropDown] uses the [`AccessibleRole::ComboBox`][crate::AccessibleRole::ComboBox] role.
    ///
    /// # Implements
    ///
    /// [`WidgetExt`][trait@crate::prelude::WidgetExt], [`trait@glib::ObjectExt`], [`AccessibleExt`][trait@crate::prelude::AccessibleExt], [`BuildableExt`][trait@crate::prelude::BuildableExt], [`ConstraintTargetExt`][trait@crate::prelude::ConstraintTargetExt], [`WidgetExtManual`][trait@crate::prelude::WidgetExtManual], [`AccessibleExtManual`][trait@crate::prelude::AccessibleExtManual]
    #[doc(alias = "GtkDropDown")]
    pub struct DropDown(Object<ffi::GtkDropDown, ffi::GtkDropDownClass>) @extends Widget, @implements Accessible, Buildable, ConstraintTarget;

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

impl DropDown {
    /// Creates a new [`DropDown`][crate::DropDown] that is populated with
    /// the strings.
    /// ## `strings`
    /// The strings to put in the dropdown
    ///
    /// # Returns
    ///
    /// a new [`DropDown`][crate::DropDown]
    #[doc(alias = "gtk_drop_down_new_from_strings")]
    #[doc(alias = "new_from_strings")]
    pub fn from_strings(strings: &[&str]) -> DropDown {
        assert_initialized_main_thread!();
        unsafe {
            Widget::from_glib_none(ffi::gtk_drop_down_new_from_strings(
                strings.to_glib_none().0,
            ))
            .unsafe_cast()
        }
    }

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

    /// Returns whether search is enabled.
    ///
    /// # Returns
    ///
    /// [`true`] if the popup includes a search entry
    #[doc(alias = "gtk_drop_down_get_enable_search")]
    #[doc(alias = "get_enable_search")]
    pub fn enables_search(&self) -> bool {
        unsafe { from_glib(ffi::gtk_drop_down_get_enable_search(self.to_glib_none().0)) }
    }

    /// Gets the expression set that is used to obtain strings from items.
    ///
    /// See [``set_expression()``][`Self::set_expression()`].
    ///
    /// # Returns
    ///
    /// a [`Expression`][crate::Expression]
    #[doc(alias = "gtk_drop_down_get_expression")]
    #[doc(alias = "get_expression")]
    pub fn expression(&self) -> Option<Expression> {
        unsafe { from_glib_none(ffi::gtk_drop_down_get_expression(self.to_glib_none().0)) }
    }

    /// Gets the factory that's currently used to populate list items.
    ///
    /// The factory returned by this function is always used for the
    /// item in the button. It is also used for items in the popup
    /// if `property::DropDown::list-factory` is not set.
    ///
    /// # Returns
    ///
    /// The factory in use
    #[doc(alias = "gtk_drop_down_get_factory")]
    #[doc(alias = "get_factory")]
    pub fn factory(&self) -> Option<ListItemFactory> {
        unsafe { from_glib_none(ffi::gtk_drop_down_get_factory(self.to_glib_none().0)) }
    }

    /// Gets the factory that's currently used to populate list items in the popup.
    ///
    /// # Returns
    ///
    /// The factory in use
    #[doc(alias = "gtk_drop_down_get_list_factory")]
    #[doc(alias = "get_list_factory")]
    pub fn list_factory(&self) -> Option<ListItemFactory> {
        unsafe { from_glib_none(ffi::gtk_drop_down_get_list_factory(self.to_glib_none().0)) }
    }

    /// Gets the model that provides the displayed items.
    ///
    /// # Returns
    ///
    /// The model in use
    #[doc(alias = "gtk_drop_down_get_model")]
    #[doc(alias = "get_model")]
    pub fn model(&self) -> Option<gio::ListModel> {
        unsafe { from_glib_none(ffi::gtk_drop_down_get_model(self.to_glib_none().0)) }
    }

    /// Gets the position of the selected item.
    ///
    /// # Returns
    ///
    /// the position of the selected item, or `GTK_INVALID_LIST_POSITION`
    ///  if not item is selected
    #[doc(alias = "gtk_drop_down_get_selected")]
    #[doc(alias = "get_selected")]
    pub fn selected(&self) -> u32 {
        unsafe { ffi::gtk_drop_down_get_selected(self.to_glib_none().0) }
    }

    /// Gets the selected item. If no item is selected, [`None`] is returned.
    ///
    /// # Returns
    ///
    /// The selected item
    #[doc(alias = "gtk_drop_down_get_selected_item")]
    #[doc(alias = "get_selected_item")]
    pub fn selected_item(&self) -> Option<glib::Object> {
        unsafe { from_glib_none(ffi::gtk_drop_down_get_selected_item(self.to_glib_none().0)) }
    }

    /// Sets whether a search entry will be shown in the popup that
    /// allows to search for items in the list.
    ///
    /// Note that `property::DropDown::expression` must be set for
    /// search to work.
    /// ## `enable_search`
    /// whether to enable search
    #[doc(alias = "gtk_drop_down_set_enable_search")]
    pub fn set_enable_search(&self, enable_search: bool) {
        unsafe {
            ffi::gtk_drop_down_set_enable_search(self.to_glib_none().0, enable_search.into_glib());
        }
    }

    /// Sets the [`ListItemFactory`][crate::ListItemFactory] to use for populating list items.
    /// ## `factory`
    /// the factory to use
    #[doc(alias = "gtk_drop_down_set_factory")]
    pub fn set_factory(&self, factory: Option<&impl IsA<ListItemFactory>>) {
        unsafe {
            ffi::gtk_drop_down_set_factory(
                self.to_glib_none().0,
                factory.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// Sets the [`ListItemFactory`][crate::ListItemFactory] to use for populating list items in the popup.
    /// ## `factory`
    /// the factory to use
    #[doc(alias = "gtk_drop_down_set_list_factory")]
    pub fn set_list_factory(&self, factory: Option<&impl IsA<ListItemFactory>>) {
        unsafe {
            ffi::gtk_drop_down_set_list_factory(
                self.to_glib_none().0,
                factory.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// Sets the `GListModel` to use.
    /// ## `model`
    /// the model to use
    #[doc(alias = "gtk_drop_down_set_model")]
    pub fn set_model(&self, model: Option<&impl IsA<gio::ListModel>>) {
        unsafe {
            ffi::gtk_drop_down_set_model(
                self.to_glib_none().0,
                model.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// Selects the item at the given position.
    /// ## `position`
    /// the position of the item to select, or `GTK_INVALID_LIST_POSITION`
    #[doc(alias = "gtk_drop_down_set_selected")]
    pub fn set_selected(&self, position: u32) {
        unsafe {
            ffi::gtk_drop_down_set_selected(self.to_glib_none().0, position);
        }
    }

    #[doc(alias = "enable-search")]
    pub fn connect_enable_search_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_enable_search_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::enable-search\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_enable_search_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "expression")]
    pub fn connect_expression_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_expression_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::expression\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_expression_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "factory")]
    pub fn connect_factory_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_factory_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::factory\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_factory_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "list-factory")]
    pub fn connect_list_factory_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_list_factory_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::list-factory\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_list_factory_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "model")]
    pub fn connect_model_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_model_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::model\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_model_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "selected")]
    pub fn connect_selected_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_selected_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::selected\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_selected_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "selected-item")]
    pub fn connect_selected_item_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_selected_item_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::selected-item\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_selected_item_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

#[derive(Clone, Default)]
// rustdoc-stripper-ignore-next
/// A [builder-pattern] type to construct [`DropDown`] objects.
///
/// [builder-pattern]: https://doc.rust-lang.org/1.0.0/style/ownership/builders.html
pub struct DropDownBuilder {
    enable_search: Option<bool>,
    expression: Option<Expression>,
    factory: Option<ListItemFactory>,
    list_factory: Option<ListItemFactory>,
    model: Option<gio::ListModel>,
    selected: Option<u32>,
    can_focus: Option<bool>,
    can_target: Option<bool>,
    css_classes: Option<Vec<String>>,
    css_name: Option<String>,
    cursor: Option<gdk::Cursor>,
    focus_on_click: Option<bool>,
    focusable: Option<bool>,
    halign: Option<Align>,
    has_tooltip: Option<bool>,
    height_request: Option<i32>,
    hexpand: Option<bool>,
    hexpand_set: Option<bool>,
    layout_manager: Option<LayoutManager>,
    margin_bottom: Option<i32>,
    margin_end: Option<i32>,
    margin_start: Option<i32>,
    margin_top: Option<i32>,
    name: Option<String>,
    opacity: Option<f64>,
    overflow: Option<Overflow>,
    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>,
    accessible_role: Option<AccessibleRole>,
}

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

    // rustdoc-stripper-ignore-next
    /// Build the [`DropDown`].
    pub fn build(self) -> DropDown {
        let mut properties: Vec<(&str, &dyn ToValue)> = vec![];
        if let Some(ref enable_search) = self.enable_search {
            properties.push(("enable-search", enable_search));
        }
        if let Some(ref expression) = self.expression {
            properties.push(("expression", expression));
        }
        if let Some(ref factory) = self.factory {
            properties.push(("factory", factory));
        }
        if let Some(ref list_factory) = self.list_factory {
            properties.push(("list-factory", list_factory));
        }
        if let Some(ref model) = self.model {
            properties.push(("model", model));
        }
        if let Some(ref selected) = self.selected {
            properties.push(("selected", selected));
        }
        if let Some(ref can_focus) = self.can_focus {
            properties.push(("can-focus", can_focus));
        }
        if let Some(ref can_target) = self.can_target {
            properties.push(("can-target", can_target));
        }
        if let Some(ref css_classes) = self.css_classes {
            properties.push(("css-classes", css_classes));
        }
        if let Some(ref css_name) = self.css_name {
            properties.push(("css-name", css_name));
        }
        if let Some(ref cursor) = self.cursor {
            properties.push(("cursor", cursor));
        }
        if let Some(ref focus_on_click) = self.focus_on_click {
            properties.push(("focus-on-click", focus_on_click));
        }
        if let Some(ref focusable) = self.focusable {
            properties.push(("focusable", focusable));
        }
        if let Some(ref halign) = self.halign {
            properties.push(("halign", halign));
        }
        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 layout_manager) = self.layout_manager {
            properties.push(("layout-manager", layout_manager));
        }
        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 opacity) = self.opacity {
            properties.push(("opacity", opacity));
        }
        if let Some(ref overflow) = self.overflow {
            properties.push(("overflow", overflow));
        }
        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 accessible_role) = self.accessible_role {
            properties.push(("accessible-role", accessible_role));
        }
        glib::Object::new::<DropDown>(&properties)
            .expect("Failed to create an instance of DropDown")
    }

    /// Whether to show a search entry in the popup.
    ///
    /// Note that search requires `property::DropDown::expression`
    /// to be set.
    pub fn enable_search(mut self, enable_search: bool) -> Self {
        self.enable_search = Some(enable_search);
        self
    }

    /// An expression to evaluate to obtain strings to match against the search
    /// term.
    ///
    /// See `property::DropDown::enable-search` for how to enable search.
    /// If `property::DropDown::factory` is not set, the expression is also
    /// used to bind strings to labels produced by a default factory.
    pub fn expression(mut self, expression: &Expression) -> Self {
        self.expression = Some(expression.clone());
        self
    }

    /// Factory for populating list items.
    pub fn factory(mut self, factory: &impl IsA<ListItemFactory>) -> Self {
        self.factory = Some(factory.clone().upcast());
        self
    }

    /// The factory for populating list items in the popup.
    ///
    /// If this is not set, `property::DropDown::factory` is used.
    pub fn list_factory(mut self, list_factory: &impl IsA<ListItemFactory>) -> Self {
        self.list_factory = Some(list_factory.clone().upcast());
        self
    }

    /// Model for the displayed items.
    pub fn model(mut self, model: &impl IsA<gio::ListModel>) -> Self {
        self.model = Some(model.clone().upcast());
        self
    }

    /// The position of the selected item.
    ///
    /// If no item is selected, the property has the value
    /// `GTK_INVALID_LIST_POSITION`.
    pub fn selected(mut self, selected: u32) -> Self {
        self.selected = Some(selected);
        self
    }

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

    /// Whether the widget can receive pointer events.
    pub fn can_target(mut self, can_target: bool) -> Self {
        self.can_target = Some(can_target);
        self
    }

    /// A list of css classes applied to this widget.
    pub fn css_classes(mut self, css_classes: Vec<String>) -> Self {
        self.css_classes = Some(css_classes);
        self
    }

    /// 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(mut self, css_name: &str) -> Self {
        self.css_name = Some(css_name.to_string());
        self
    }

    /// The cursor used by `widget`.
    pub fn cursor(mut self, cursor: &gdk::Cursor) -> Self {
        self.cursor = Some(cursor.clone());
        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.
    pub fn focus_on_click(mut self, focus_on_click: bool) -> Self {
        self.focus_on_click = Some(focus_on_click);
        self
    }

    /// Whether this widget itself will accept the input focus.
    pub fn focusable(mut self, focusable: bool) -> Self {
        self.focusable = Some(focusable);
        self
    }

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

    /// 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 `signal::Widget::query-tooltip` to
    /// determine whether it will provide a tooltip or not.
    pub fn has_tooltip(mut self, has_tooltip: bool) -> Self {
        self.has_tooltip = Some(has_tooltip);
        self
    }

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

    /// Whether to expand horizontally.
    pub fn hexpand(mut self, hexpand: bool) -> Self {
        self.hexpand = Some(hexpand);
        self
    }

    /// Whether to use the `hexpand` property.
    pub fn hexpand_set(mut self, hexpand_set: bool) -> Self {
        self.hexpand_set = Some(hexpand_set);
        self
    }

    /// The [`LayoutManager`][crate::LayoutManager] 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.
    pub fn layout_manager(mut self, layout_manager: &impl IsA<LayoutManager>) -> Self {
        self.layout_manager = Some(layout_manager.clone().upcast());
        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
    }

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

    /// The requested opacity of the widget.
    pub fn opacity(mut self, opacity: f64) -> Self {
        self.opacity = Some(opacity);
        self
    }

    /// 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.
    pub fn overflow(mut self, overflow: Overflow) -> Self {
        self.overflow = Some(overflow);
        self
    }

    /// Whether the widget will receive the default action when it is focused.
    pub fn receives_default(mut self, receives_default: bool) -> Self {
        self.receives_default = Some(receives_default);
        self
    }

    /// Whether the widget responds to input.
    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 Pango markup.
    ///
    /// 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.
    pub fn valign(mut self, valign: Align) -> Self {
        self.valign = Some(valign);
        self
    }

    /// Whether to expand vertically.
    pub fn vexpand(mut self, vexpand: bool) -> Self {
        self.vexpand = Some(vexpand);
        self
    }

    /// Whether to use the `vexpand` property.
    pub fn vexpand_set(mut self, vexpand_set: bool) -> Self {
        self.vexpand_set = Some(vexpand_set);
        self
    }

    /// Whether the widget is visible.
    pub fn visible(mut self, visible: bool) -> Self {
        self.visible = Some(visible);
        self
    }

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

    /// The accessible role of the given [`Accessible`][crate::Accessible] implementation.
    ///
    /// The accessible role cannot be changed once set.
    pub fn accessible_role(mut self, accessible_role: AccessibleRole) -> Self {
        self.accessible_role = Some(accessible_role);
        self
    }
}

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