gtk4/auto/

drop_down.rs

// 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

#[cfg(feature = "v4_12")]
#[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
use crate::StringFilterMatchMode;
use crate::{
    Accessible, AccessibleRole, Align, Buildable, ConstraintTarget, Expression, LayoutManager,
    ListItemFactory, Overflow, Widget, ffi,
};
#[cfg(feature = "v4_6")]
#[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
use glib::object::ObjectType as _;
use glib::{
    prelude::*,
    signal::{SignalHandlerId, connect_raw},
    translate::*,
};
use std::boxed::Box as Box_;

glib::wrapper! {
    /// Allows the user to choose an item from a list of options.
    ///
    /// <picture>
    ///   <source srcset="drop-down-dark.png" media="(prefers-color-scheme: dark)">
    ///   <img alt="An example GtkDropDown" src="drop-down.png">
    /// </picture>
    ///
    /// The [`DropDown`][crate::DropDown] displays the [selected][`selected`][struct@crate::DropDown#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,
    /// and adds a checkmark to the selected item in the popup.
    ///
    /// To set your own factory, use [`set_factory()`][Self::set_factory()]. It is
    /// possible to use a separate factory for the items in the popup, with
    /// [`set_list_factory()`][Self::set_list_factory()].
    ///
    /// [`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()].
    ///
    /// Here is a UI definition example for [`DropDown`][crate::DropDown] with a simple model:
    ///
    /// ```xml
    /// <object class="GtkDropDown">
    ///   <property name="model">
    ///     <object class="GtkStringList">
    ///       <items>
    ///         <item translatable="yes">Factory</item>
    ///         <item translatable="yes">Home</item>
    ///         <item translatable="yes">Subway</item>
    ///       </items>
    ///     </object>
    ///   </property>
    /// </object>
    /// ```
    ///
    /// If a [`DropDown`][crate::DropDown] is created in this manner, or with
    /// [`from_strings()`][Self::from_strings()], for instance, the object returned from
    /// [`selected_item()`][Self::selected_item()] will be a [`StringObject`][crate::StringObject].
    ///
    /// To learn more about the list widget framework, see the
    /// [overview](section-list-widget.html).
    ///
    /// ## 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 [enum@Gtk.AccessibleRole.combo_box] role.
    ///
    /// ## Properties
    ///
    ///
    /// #### `enable-search`
    ///  Whether to show a search entry in the popup.
    ///
    /// Note that search requires [`expression`][struct@crate::DropDown#expression]
    /// to be set.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `expression`
    ///  An expression to evaluate to obtain strings to match against the search
    /// term.
    ///
    /// See [`enable-search`][struct@crate::DropDown#enable-search] for how to enable search.
    /// If [`factory`][struct@crate::DropDown#factory] is not set, the expression is also
    /// used to bind strings to labels produced by a default factory.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `factory`
    ///  Factory for populating list items.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `header-factory`
    ///  The factory for creating header widgets for the popup.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `list-factory`
    ///  The factory for populating list items in the popup.
    ///
    /// If this is not set, [`factory`][struct@crate::DropDown#factory] is used.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `model`
    ///  Model for the displayed items.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `search-match-mode`
    ///  The match mode for the search filter.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `selected`
    ///  The position of the selected item.
    ///
    /// If no item is selected, the property has the value
    /// `GTK_INVALID_LIST_POSITION`.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `selected-item`
    ///  The selected item.
    ///
    /// Readable
    ///
    ///
    /// #### `show-arrow`
    ///  Whether to show an arrow within the GtkDropDown widget.
    ///
    /// Readable | Writeable
    /// <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`][struct@crate::Widget#query-tooltip]
    /// signal on @widget.
    ///
    /// A true value indicates that @widget can have a tooltip, in this case
    /// the widget will be queried using [`query-tooltip`][struct@crate::Widget#query-tooltip] to
    /// determine whether it will provide a tooltip or not.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `height-request`
    ///  Overrides 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 [`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.
    ///
    /// Readable | Writeable
    ///
    ///
    /// #### `limit-events`
    ///  Makes this widget act like a modal dialog, with respect to
    /// event delivery.
    ///
    /// Global event controllers will not handle events with targets
    /// inside the widget, unless they are set up to ignore propagation
    /// limits. See [`EventControllerExt::set_propagation_limit()`][crate::prelude::EventControllerExt::set_propagation_limit()].
    ///
    /// 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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::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 [`Root`][crate::Root] widget of the widget tree containing this widget.
    ///
    /// This will be `NULL` 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 [`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 `NULL`:
    /// [`has-tooltip`][struct@crate::Widget#has-tooltip] will automatically be set to true
    /// and there will be taken care of [`query-tooltip`][struct@crate::Widget#query-tooltip] in
    /// the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::Widget#tooltip-text] and
    /// [`tooltip-markup`][struct@crate::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 [`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 `NULL`:
    /// [`has-tooltip`][struct@crate::Widget#has-tooltip] will automatically be set to true
    /// and there will be taken care of [`query-tooltip`][struct@crate::Widget#query-tooltip] in
    /// the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::Widget#tooltip-text] and
    /// [`tooltip-markup`][struct@crate::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`
    ///  Overrides 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 [`Accessible`][crate::Accessible] implementation.
    ///
    /// The accessible role cannot be changed once set.
    ///
    /// Readable | Writeable
    /// </details>
    ///
    /// ## Signals
    ///
    ///
    /// #### `activate`
    ///  Emitted to when the drop down is activated.
    ///
    /// The `::activate` signal on [`DropDown`][crate::DropDown] is an action signal and
    /// emitting it causes the drop down to pop up its dropdown.
    ///
    /// Action
    /// <details><summary><h4>Widget</h4></summary>
    ///
    ///
    /// #### `destroy`
    ///  Signals that all holders of a reference to the widget should release
    /// the reference that they hold.
    ///
    /// May result in finalization of the widget if all references are released.
    ///
    /// This signal is not suitable for saving widget state.
    ///
    ///
    ///
    ///
    /// #### `direction-changed`
    ///  Emitted when the text direction of a widget changes.
    ///
    ///
    ///
    ///
    /// #### `hide`
    ///  Emitted when @widget is hidden.
    ///
    ///
    ///
    ///
    /// #### `keynav-failed`
    ///  Emitted if keyboard navigation fails.
    ///
    /// See [`WidgetExt::keynav_failed()`][crate::prelude::WidgetExt::keynav_failed()] for details.
    ///
    ///
    ///
    ///
    /// #### `map`
    ///  Emitted when @widget is going to be mapped.
    ///
    /// A widget is mapped when the widget is visible (which is controlled with
    /// [`visible`][struct@crate::Widget#visible]) and all its parents up to the toplevel widget
    /// are also visible.
    ///
    /// The `::map` signal can be used to determine whether a widget will be drawn,
    /// for instance it can resume an animation that was stopped during the
    /// emission of [`unmap`][struct@crate::Widget#unmap].
    ///
    ///
    ///
    ///
    /// #### `mnemonic-activate`
    ///  Emitted when a widget is activated via a mnemonic.
    ///
    /// The default handler for this signal activates @widget if @group_cycling
    /// is false, or just makes @widget grab focus if @group_cycling is true.
    ///
    ///
    ///
    ///
    /// #### `move-focus`
    ///  Emitted when the focus is moved.
    ///
    /// The `::move-focus` signal is a [keybinding signal](class.SignalAction.html).
    ///
    /// The default bindings for this signal are <kbd>Tab</kbd> to move forward,
    /// and <kbd>Shift</kbd>+<kbd>Tab</kbd> to move backward.
    ///
    /// Action
    ///
    ///
    /// #### `query-tooltip`
    ///  Emitted when the widget’s tooltip is about to be shown.
    ///
    /// This happens when the [`has-tooltip`][struct@crate::Widget#has-tooltip] property
    /// is true and the hover timeout has expired with the cursor hovering
    /// above @widget; or emitted when @widget got focus in keyboard mode.
    ///
    /// Using the given coordinates, the signal handler should determine
    /// whether a tooltip should be shown for @widget. If this is the case
    /// true should be returned, false otherwise. Note that if @keyboard_mode
    /// is true, the values of @x and @y are undefined and should not be used.
    ///
    /// The signal handler is free to manipulate @tooltip with the therefore
    /// destined function calls.
    ///
    ///
    ///
    ///
    /// #### `realize`
    ///  Emitted when @widget is associated with a [`gdk::Surface`][crate::gdk::Surface].
    ///
    /// This means that [`WidgetExt::realize()`][crate::prelude::WidgetExt::realize()] has been called
    /// or the widget has been mapped (that is, it is going to be drawn).
    ///
    ///
    ///
    ///
    /// #### `show`
    ///  Emitted when @widget is shown.
    ///
    ///
    ///
    ///
    /// #### `state-flags-changed`
    ///  Emitted when the widget state changes.
    ///
    /// See [`WidgetExt::state_flags()`][crate::prelude::WidgetExt::state_flags()].
    ///
    ///
    ///
    ///
    /// #### `unmap`
    ///  Emitted when @widget is going to be unmapped.
    ///
    /// A widget is unmapped when either it or any of its parents up to the
    /// toplevel widget have been set as hidden.
    ///
    /// As `::unmap` indicates that a widget will not be shown any longer,
    /// it can be used to, for example, stop an animation on the widget.
    ///
    ///
    ///
    ///
    /// #### `unrealize`
    ///  Emitted when the [`gdk::Surface`][crate::gdk::Surface] associated with @widget is destroyed.
    ///
    /// This means that [`WidgetExt::unrealize()`][crate::prelude::WidgetExt::unrealize()] has been called
    /// or the widget has been unmapped (that is, it is going to be hidden).
    ///
    ///
    /// </details>
    ///
    /// # 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].
    ///
    /// You may want to call [`set_factory()`][Self::set_factory()]
    /// to set up a way to map its items to widgets.
    /// ## `model`
    /// the model to use
    /// ## `expression`
    /// the expression to use
    ///
    /// # Returns
    ///
    /// a new [`DropDown`][crate::DropDown]
    #[doc(alias = "gtk_drop_down_new")]
    pub fn new(
        model: Option<impl IsA<gio::ListModel>>,
        expression: Option<impl AsRef<Expression>>,
    ) -> DropDown {
        assert_initialized_main_thread!();
        unsafe {
            Widget::from_glib_none(ffi::gtk_drop_down_new(
                model.map(|p| p.upcast()).into_glib_ptr(),
                expression
                    .map(|p| p.as_ref().clone().upcast())
                    .into_glib_ptr(),
            ))
            .unsafe_cast()
        }
    }

    /// 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`](crate::builders::DropDownBuilder) which can be used to create [`DropDown`] objects.
    pub fn builder() -> DropDownBuilder {
        DropDownBuilder::new()
    }

    /// 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")]
    #[doc(alias = "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 [`list-factory`][struct@crate::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 create header widgets for the popup.
    ///
    /// # Returns
    ///
    /// The factory in use
    #[cfg(feature = "v4_12")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
    #[doc(alias = "gtk_drop_down_get_header_factory")]
    #[doc(alias = "get_header_factory")]
    #[doc(alias = "header-factory")]
    pub fn header_factory(&self) -> Option<ListItemFactory> {
        unsafe { from_glib_none(ffi::gtk_drop_down_get_header_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")]
    #[doc(alias = "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)) }
    }

    /// Returns the match mode that the search filter is using.
    ///
    /// # Returns
    ///
    /// the match mode of the search filter
    #[cfg(feature = "v4_12")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
    #[doc(alias = "gtk_drop_down_get_search_match_mode")]
    #[doc(alias = "get_search_match_mode")]
    #[doc(alias = "search-match-mode")]
    pub fn search_match_mode(&self) -> StringFilterMatchMode {
        unsafe {
            from_glib(ffi::gtk_drop_down_get_search_match_mode(
                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 no 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")]
    #[doc(alias = "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)) }
    }

    /// Returns whether to show an arrow within the widget.
    ///
    /// # Returns
    ///
    /// [`true`] if an arrow will be shown.
    #[cfg(feature = "v4_6")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
    #[doc(alias = "gtk_drop_down_get_show_arrow")]
    #[doc(alias = "get_show_arrow")]
    #[doc(alias = "show-arrow")]
    pub fn shows_arrow(&self) -> bool {
        unsafe { from_glib(ffi::gtk_drop_down_get_show_arrow(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 [`expression`][struct@crate::DropDown#expression] must be set for
    /// search to work.
    /// ## `enable_search`
    /// whether to enable search
    #[doc(alias = "gtk_drop_down_set_enable_search")]
    #[doc(alias = "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 expression that gets evaluated to obtain strings from items.
    ///
    /// This is used for search in the popup. The expression must have
    /// a value type of `G_TYPE_STRING`.
    /// ## `expression`
    /// a [`Expression`][crate::Expression]
    #[doc(alias = "gtk_drop_down_set_expression")]
    #[doc(alias = "expression")]
    pub fn set_expression(&self, expression: Option<impl AsRef<Expression>>) {
        unsafe {
            ffi::gtk_drop_down_set_expression(
                self.to_glib_none().0,
                expression.as_ref().map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// Sets the [`ListItemFactory`][crate::ListItemFactory] to use for populating list items.
    /// ## `factory`
    /// the factory to use
    #[doc(alias = "gtk_drop_down_set_factory")]
    #[doc(alias = "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 creating header widgets for the popup.
    /// ## `factory`
    /// the factory to use
    #[cfg(feature = "v4_12")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
    #[doc(alias = "gtk_drop_down_set_header_factory")]
    #[doc(alias = "header-factory")]
    pub fn set_header_factory(&self, factory: Option<&impl IsA<ListItemFactory>>) {
        unsafe {
            ffi::gtk_drop_down_set_header_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")]
    #[doc(alias = "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")]
    #[doc(alias = "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,
            );
        }
    }

    /// Sets the match mode for the search filter.
    /// ## `search_match_mode`
    /// the new match mode
    #[cfg(feature = "v4_12")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
    #[doc(alias = "gtk_drop_down_set_search_match_mode")]
    #[doc(alias = "search-match-mode")]
    pub fn set_search_match_mode(&self, search_match_mode: StringFilterMatchMode) {
        unsafe {
            ffi::gtk_drop_down_set_search_match_mode(
                self.to_glib_none().0,
                search_match_mode.into_glib(),
            );
        }
    }

    /// 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")]
    #[doc(alias = "selected")]
    pub fn set_selected(&self, position: u32) {
        unsafe {
            ffi::gtk_drop_down_set_selected(self.to_glib_none().0, position);
        }
    }

    /// Sets whether an arrow will be displayed within the widget.
    /// ## `show_arrow`
    /// whether to show an arrow within the widget
    #[cfg(feature = "v4_6")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
    #[doc(alias = "gtk_drop_down_set_show_arrow")]
    #[doc(alias = "show-arrow")]
    pub fn set_show_arrow(&self, show_arrow: bool) {
        unsafe {
            ffi::gtk_drop_down_set_show_arrow(self.to_glib_none().0, show_arrow.into_glib());
        }
    }

    /// Emitted to when the drop down is activated.
    ///
    /// The `::activate` signal on [`DropDown`][crate::DropDown] is an action signal and
    /// emitting it causes the drop down to pop up its dropdown.
    #[cfg(feature = "v4_6")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
    #[doc(alias = "activate")]
    pub fn connect_activate<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn activate_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                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 _,
                c"activate".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    activate_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[cfg(feature = "v4_6")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
    pub fn emit_activate(&self) {
        self.emit_by_name::<()>("activate", &[]);
    }

    #[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,
        ) {
            unsafe {
                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 _,
                c"notify::enable-search".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), 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,
        ) {
            unsafe {
                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 _,
                c"notify::expression".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), 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,
        ) {
            unsafe {
                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 _,
                c"notify::factory".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_factory_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[cfg(feature = "v4_12")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
    #[doc(alias = "header-factory")]
    pub fn connect_header_factory_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_header_factory_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                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 _,
                c"notify::header-factory".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_header_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,
        ) {
            unsafe {
                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 _,
                c"notify::list-factory".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), 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,
        ) {
            unsafe {
                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 _,
                c"notify::model".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_model_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[cfg(feature = "v4_12")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
    #[doc(alias = "search-match-mode")]
    pub fn connect_search_match_mode_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_search_match_mode_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                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 _,
                c"notify::search-match-mode".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_search_match_mode_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,
        ) {
            unsafe {
                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 _,
                c"notify::selected".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), 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,
        ) {
            unsafe {
                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 _,
                c"notify::selected-item".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_selected_item_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[cfg(feature = "v4_6")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
    #[doc(alias = "show-arrow")]
    pub fn connect_show_arrow_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_show_arrow_trampoline<F: Fn(&DropDown) + 'static>(
            this: *mut ffi::GtkDropDown,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            unsafe {
                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 _,
                c"notify::show-arrow".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    notify_show_arrow_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

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

// 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
#[must_use = "The builder must be built to be used"]
pub struct DropDownBuilder {
    builder: glib::object::ObjectBuilder<'static, DropDown>,
}

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

    /// Whether to show a search entry in the popup.
    ///
    /// Note that search requires [`expression`][struct@crate::DropDown#expression]
    /// to be set.
    pub fn enable_search(self, enable_search: bool) -> Self {
        Self {
            builder: self.builder.property("enable-search", enable_search),
        }
    }

    /// An expression to evaluate to obtain strings to match against the search
    /// term.
    ///
    /// See [`enable-search`][struct@crate::DropDown#enable-search] for how to enable search.
    /// If [`factory`][struct@crate::DropDown#factory] is not set, the expression is also
    /// used to bind strings to labels produced by a default factory.
    pub fn expression(self, expression: impl AsRef<Expression>) -> Self {
        Self {
            builder: self
                .builder
                .property("expression", expression.as_ref().clone()),
        }
    }

    /// Factory for populating list items.
    pub fn factory(self, factory: &impl IsA<ListItemFactory>) -> Self {
        Self {
            builder: self.builder.property("factory", factory.clone().upcast()),
        }
    }

    /// The factory for creating header widgets for the popup.
    #[cfg(feature = "v4_12")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
    pub fn header_factory(self, header_factory: &impl IsA<ListItemFactory>) -> Self {
        Self {
            builder: self
                .builder
                .property("header-factory", header_factory.clone().upcast()),
        }
    }

    /// The factory for populating list items in the popup.
    ///
    /// If this is not set, [`factory`][struct@crate::DropDown#factory] is used.
    pub fn list_factory(self, list_factory: &impl IsA<ListItemFactory>) -> Self {
        Self {
            builder: self
                .builder
                .property("list-factory", list_factory.clone().upcast()),
        }
    }

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

    /// The match mode for the search filter.
    #[cfg(feature = "v4_12")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_12")))]
    pub fn search_match_mode(self, search_match_mode: StringFilterMatchMode) -> Self {
        Self {
            builder: self
                .builder
                .property("search-match-mode", search_match_mode),
        }
    }

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

    /// Whether to show an arrow within the GtkDropDown widget.
    #[cfg(feature = "v4_6")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_6")))]
    pub fn show_arrow(self, show_arrow: bool) -> Self {
        Self {
            builder: self.builder.property("show-arrow", show_arrow),
        }
    }

    /// 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()),
        }
    }

    /// The cursor used by @widget.
    pub fn cursor(self, cursor: &gdk::Cursor) -> Self {
        Self {
            builder: self.builder.property("cursor", cursor.clone()),
        }
    }

    /// 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: Align) -> Self {
        Self {
            builder: self.builder.property("halign", halign),
        }
    }

    /// Enables or disables the emission of the [`query-tooltip`][struct@crate::Widget#query-tooltip]
    /// signal on @widget.
    ///
    /// A true value indicates that @widget can have a tooltip, in this case
    /// the widget will be queried using [`query-tooltip`][struct@crate::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),
        }
    }

    /// Overrides 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),
        }
    }

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

    /// Makes this widget act like a modal dialog, with respect to
    /// event delivery.
    ///
    /// Global event controllers will not handle events with targets
    /// inside the widget, unless they are set up to ignore propagation
    /// limits. See [`EventControllerExt::set_propagation_limit()`][crate::prelude::EventControllerExt::set_propagation_limit()].
    #[cfg(feature = "v4_18")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v4_18")))]
    pub fn limit_events(self, limit_events: bool) -> Self {
        Self {
            builder: self.builder.property("limit-events", limit_events),
        }
    }

    /// 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(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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::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
    /// [`WidgetExt::set_size_request()`][crate::prelude::WidgetExt::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),
        }
    }

    /// 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(self, overflow: 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 [`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 `NULL`:
    /// [`has-tooltip`][struct@crate::Widget#has-tooltip] will automatically be set to true
    /// and there will be taken care of [`query-tooltip`][struct@crate::Widget#query-tooltip] in
    /// the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::Widget#tooltip-text] and
    /// [`tooltip-markup`][struct@crate::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 [`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 `NULL`:
    /// [`has-tooltip`][struct@crate::Widget#has-tooltip] will automatically be set to true
    /// and there will be taken care of [`query-tooltip`][struct@crate::Widget#query-tooltip] in
    /// the default signal handler.
    ///
    /// Note that if both [`tooltip-text`][struct@crate::Widget#tooltip-text] and
    /// [`tooltip-markup`][struct@crate::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: 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),
        }
    }

    /// Overrides 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),
        }
    }

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

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