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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::Adjustment;
use crate::Align;
use crate::Buildable;
use crate::ConstraintTarget;
use crate::LayoutManager;
use crate::ListBase;
use crate::ListItemFactory;
use crate::Orientable;
use crate::Orientation;
use crate::Overflow;
use crate::Scrollable;
use crate::ScrollablePolicy;
use crate::SelectionModel;
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! {
    /// [`GridView`][crate::GridView] presents a large dynamic grid of items.
    ///
    /// [`GridView`][crate::GridView] uses its factory to generate one child widget for each
    /// visible item and shows them in a grid. The orientation of the grid view
    /// determines if the grid reflows vertically or horizontally.
    ///
    /// [`GridView`][crate::GridView] allows the user to select items according to the selection
    /// characteristics of the model. For models that allow multiple selected items,
    /// it is possible to turn on _rubberband selection_, using
    /// `property::GridView::enable-rubberband`.
    ///
    /// To learn more about the list widget framework, see the
    /// [overview](section-list-widget.html).
    ///
    /// # CSS nodes
    ///
    /// ```text
    /// gridview
    /// ├── child
    /// │
    /// ├── child
    /// │
    /// ┊
    /// ╰── [rubberband]
    /// ```
    ///
    /// [`GridView`][crate::GridView] uses a single CSS node with name gridview. Each child
    /// uses a single CSS node with name child. For rubberband selection,
    /// a subnode with name rubberband is used.
    ///
    /// # Accessibility
    ///
    /// [`GridView`][crate::GridView] uses the [`AccessibleRole::Grid`][crate::AccessibleRole::Grid] role, and the items
    /// use the [`AccessibleRole::GridCell`][crate::AccessibleRole::GridCell] role.
    ///
    /// # Implements
    ///
    /// [`ListBaseExt`][trait@crate::prelude::ListBaseExt], [`WidgetExt`][trait@crate::prelude::WidgetExt], [`trait@glib::ObjectExt`], [`AccessibleExt`][trait@crate::prelude::AccessibleExt], [`BuildableExt`][trait@crate::prelude::BuildableExt], [`ConstraintTargetExt`][trait@crate::prelude::ConstraintTargetExt], [`OrientableExt`][trait@crate::prelude::OrientableExt], [`ScrollableExt`][trait@crate::prelude::ScrollableExt], [`WidgetExtManual`][trait@crate::prelude::WidgetExtManual], [`AccessibleExtManual`][trait@crate::prelude::AccessibleExtManual]
    #[doc(alias = "GtkGridView")]
    pub struct GridView(Object<ffi::GtkGridView, ffi::GtkGridViewClass>) @extends ListBase, Widget, @implements Accessible, Buildable, ConstraintTarget, Orientable, Scrollable;

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

impl GridView {
    /// Creates a new [`GridView`][crate::GridView] that uses the given `factory` for
    /// mapping items to widgets.
    ///
    /// The function takes ownership of the
    /// arguments, so you can write code like
    /// **⚠️ The following code is in c ⚠️**
    ///
    /// ```c
    /// grid_view = gtk_grid_view_new (create_model (),
    ///   gtk_builder_list_item_factory_new_from_resource ("/resource.ui"));
    /// ```
    /// ## `model`
    /// the model to use, or [`None`]
    /// ## `factory`
    /// The factory to populate items with, or [`None`]
    ///
    /// # Returns
    ///
    /// a new [`GridView`][crate::GridView] using the given `model` and `factory`
    #[doc(alias = "gtk_grid_view_new")]
    pub fn new<P: IsA<SelectionModel>, Q: IsA<ListItemFactory>>(
        model: Option<&P>,
        factory: Option<&Q>,
    ) -> GridView {
        assert_initialized_main_thread!();
        unsafe {
            Widget::from_glib_none(ffi::gtk_grid_view_new(
                model.map(|p| p.as_ref()).to_glib_full(),
                factory.map(|p| p.as_ref()).to_glib_full(),
            ))
            .unsafe_cast()
        }
    }

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

    /// Returns whether rows can be selected by dragging with the mouse.
    ///
    /// # Returns
    ///
    /// [`true`] if rubberband selection is enabled
    #[doc(alias = "gtk_grid_view_get_enable_rubberband")]
    #[doc(alias = "get_enable_rubberband")]
    pub fn enables_rubberband(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_grid_view_get_enable_rubberband(
                self.to_glib_none().0,
            ))
        }
    }

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

    /// Gets the maximum number of columns that the grid will use.
    ///
    /// # Returns
    ///
    /// The maximum number of columns
    #[doc(alias = "gtk_grid_view_get_max_columns")]
    #[doc(alias = "get_max_columns")]
    pub fn max_columns(&self) -> u32 {
        unsafe { ffi::gtk_grid_view_get_max_columns(self.to_glib_none().0) }
    }

    /// Gets the minimum number of columns that the grid will use.
    ///
    /// # Returns
    ///
    /// The minimum number of columns
    #[doc(alias = "gtk_grid_view_get_min_columns")]
    #[doc(alias = "get_min_columns")]
    pub fn min_columns(&self) -> u32 {
        unsafe { ffi::gtk_grid_view_get_min_columns(self.to_glib_none().0) }
    }

    /// Gets the model that's currently used to read the items displayed.
    ///
    /// # Returns
    ///
    /// The model in use
    #[doc(alias = "gtk_grid_view_get_model")]
    #[doc(alias = "get_model")]
    pub fn model(&self) -> Option<SelectionModel> {
        unsafe { from_glib_none(ffi::gtk_grid_view_get_model(self.to_glib_none().0)) }
    }

    /// Returns whether items will be activated on single click and
    /// selected on hover.
    ///
    /// # Returns
    ///
    /// [`true`] if items are activated on single click
    #[doc(alias = "gtk_grid_view_get_single_click_activate")]
    #[doc(alias = "get_single_click_activate")]
    pub fn is_single_click_activate(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_grid_view_get_single_click_activate(
                self.to_glib_none().0,
            ))
        }
    }

    /// Sets whether selections can be changed by dragging with the mouse.
    /// ## `enable_rubberband`
    /// [`true`] to enable rubberband selection
    #[doc(alias = "gtk_grid_view_set_enable_rubberband")]
    pub fn set_enable_rubberband(&self, enable_rubberband: bool) {
        unsafe {
            ffi::gtk_grid_view_set_enable_rubberband(
                self.to_glib_none().0,
                enable_rubberband.into_glib(),
            );
        }
    }

    /// Sets the [`ListItemFactory`][crate::ListItemFactory] to use for populating list items.
    /// ## `factory`
    /// the factory to use or [`None`] for none
    #[doc(alias = "gtk_grid_view_set_factory")]
    pub fn set_factory<P: IsA<ListItemFactory>>(&self, factory: Option<&P>) {
        unsafe {
            ffi::gtk_grid_view_set_factory(
                self.to_glib_none().0,
                factory.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// Sets the maximum number of columns to use.
    ///
    /// This number must be at least 1.
    ///
    /// If `max_columns` is smaller than the minimum set via
    /// [``set_min_columns()``][`Self::set_min_columns()`], that value is used instead.
    /// ## `max_columns`
    /// The maximum number of columns
    #[doc(alias = "gtk_grid_view_set_max_columns")]
    pub fn set_max_columns(&self, max_columns: u32) {
        unsafe {
            ffi::gtk_grid_view_set_max_columns(self.to_glib_none().0, max_columns);
        }
    }

    /// Sets the minimum number of columns to use.
    ///
    /// This number must be at least 1.
    ///
    /// If `min_columns` is smaller than the minimum set via
    /// [``set_max_columns()``][`Self::set_max_columns()`], that value is ignored.
    /// ## `min_columns`
    /// The minimum number of columns
    #[doc(alias = "gtk_grid_view_set_min_columns")]
    pub fn set_min_columns(&self, min_columns: u32) {
        unsafe {
            ffi::gtk_grid_view_set_min_columns(self.to_glib_none().0, min_columns);
        }
    }

    /// Sets the imodel to use.
    ///
    /// This must be a [`SelectionModel`][crate::SelectionModel].
    /// ## `model`
    /// the model to use or [`None`] for none
    #[doc(alias = "gtk_grid_view_set_model")]
    pub fn set_model<P: IsA<SelectionModel>>(&self, model: Option<&P>) {
        unsafe {
            ffi::gtk_grid_view_set_model(
                self.to_glib_none().0,
                model.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    /// Sets whether items should be activated on single click and
    /// selected on hover.
    /// ## `single_click_activate`
    /// [`true`] to activate items on single click
    #[doc(alias = "gtk_grid_view_set_single_click_activate")]
    pub fn set_single_click_activate(&self, single_click_activate: bool) {
        unsafe {
            ffi::gtk_grid_view_set_single_click_activate(
                self.to_glib_none().0,
                single_click_activate.into_glib(),
            );
        }
    }

    /// Emitted when a cell has been activated by the user,
    /// usually via activating the GtkGridView|list.activate-item action.
    ///
    /// This allows for a convenient way to handle activation in a gridview.
    /// See `property::ListItem::activatable` for details on how to use
    /// this signal.
    /// ## `position`
    /// position of item to activate
    #[doc(alias = "activate")]
    pub fn connect_activate<F: Fn(&Self, u32) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn activate_trampoline<F: Fn(&GridView, u32) + 'static>(
            this: *mut ffi::GtkGridView,
            position: libc::c_uint,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this), position)
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"activate\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    activate_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "enable-rubberband")]
    pub fn connect_enable_rubberband_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_enable_rubberband_trampoline<F: Fn(&GridView) + 'static>(
            this: *mut ffi::GtkGridView,
            _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-rubberband\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_enable_rubberband_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(&GridView) + 'static>(
            this: *mut ffi::GtkGridView,
            _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 = "max-columns")]
    pub fn connect_max_columns_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_max_columns_trampoline<F: Fn(&GridView) + 'static>(
            this: *mut ffi::GtkGridView,
            _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::max-columns\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_max_columns_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "min-columns")]
    pub fn connect_min_columns_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_min_columns_trampoline<F: Fn(&GridView) + 'static>(
            this: *mut ffi::GtkGridView,
            _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::min-columns\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_min_columns_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(&GridView) + 'static>(
            this: *mut ffi::GtkGridView,
            _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 = "single-click-activate")]
    pub fn connect_single_click_activate_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_single_click_activate_trampoline<F: Fn(&GridView) + 'static>(
            this: *mut ffi::GtkGridView,
            _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::single-click-activate\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_single_click_activate_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

#[derive(Clone, Default)]
// rustdoc-stripper-ignore-next
/// A [builder-pattern] type to construct [`GridView`] objects.
///
/// [builder-pattern]: https://doc.rust-lang.org/1.0.0/style/ownership/builders.html
pub struct GridViewBuilder {
    enable_rubberband: Option<bool>,
    factory: Option<ListItemFactory>,
    max_columns: Option<u32>,
    min_columns: Option<u32>,
    model: Option<SelectionModel>,
    single_click_activate: Option<bool>,
    orientation: Option<Orientation>,
    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>,
    hadjustment: Option<Adjustment>,
    hscroll_policy: Option<ScrollablePolicy>,
    vadjustment: Option<Adjustment>,
    vscroll_policy: Option<ScrollablePolicy>,
}

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

    // rustdoc-stripper-ignore-next
    /// Build the [`GridView`].
    pub fn build(self) -> GridView {
        let mut properties: Vec<(&str, &dyn ToValue)> = vec![];
        if let Some(ref enable_rubberband) = self.enable_rubberband {
            properties.push(("enable-rubberband", enable_rubberband));
        }
        if let Some(ref factory) = self.factory {
            properties.push(("factory", factory));
        }
        if let Some(ref max_columns) = self.max_columns {
            properties.push(("max-columns", max_columns));
        }
        if let Some(ref min_columns) = self.min_columns {
            properties.push(("min-columns", min_columns));
        }
        if let Some(ref model) = self.model {
            properties.push(("model", model));
        }
        if let Some(ref single_click_activate) = self.single_click_activate {
            properties.push(("single-click-activate", single_click_activate));
        }
        if let Some(ref orientation) = self.orientation {
            properties.push(("orientation", orientation));
        }
        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));
        }
        if let Some(ref hadjustment) = self.hadjustment {
            properties.push(("hadjustment", hadjustment));
        }
        if let Some(ref hscroll_policy) = self.hscroll_policy {
            properties.push(("hscroll-policy", hscroll_policy));
        }
        if let Some(ref vadjustment) = self.vadjustment {
            properties.push(("vadjustment", vadjustment));
        }
        if let Some(ref vscroll_policy) = self.vscroll_policy {
            properties.push(("vscroll-policy", vscroll_policy));
        }
        glib::Object::new::<GridView>(&properties)
            .expect("Failed to create an instance of GridView")
    }

    /// Allow rubberband selection.
    pub fn enable_rubberband(mut self, enable_rubberband: bool) -> Self {
        self.enable_rubberband = Some(enable_rubberband);
        self
    }

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

    /// Maximum number of columns per row.
    ///
    /// If this number is smaller than `property::GridView::min-columns`,
    /// that value is used instead.
    pub fn max_columns(mut self, max_columns: u32) -> Self {
        self.max_columns = Some(max_columns);
        self
    }

    /// Minimum number of columns per row.
    pub fn min_columns(mut self, min_columns: u32) -> Self {
        self.min_columns = Some(min_columns);
        self
    }

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

    /// Activate rows on single click and select them on hover.
    pub fn single_click_activate(mut self, single_click_activate: bool) -> Self {
        self.single_click_activate = Some(single_click_activate);
        self
    }

    /// The orientation of the list. See GtkOrientable:orientation
    /// for details.
    pub fn orientation(mut self, orientation: Orientation) -> Self {
        self.orientation = Some(orientation);
        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<P: IsA<LayoutManager>>(mut self, layout_manager: &P) -> 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
    }

    /// Horizontal [`Adjustment`][crate::Adjustment] of the scrollable widget.
    ///
    /// This adjustment is shared between the scrollable widget and its parent.
    pub fn hadjustment<P: IsA<Adjustment>>(mut self, hadjustment: &P) -> Self {
        self.hadjustment = Some(hadjustment.clone().upcast());
        self
    }

    /// Determines when horizontal scrolling should start.
    pub fn hscroll_policy(mut self, hscroll_policy: ScrollablePolicy) -> Self {
        self.hscroll_policy = Some(hscroll_policy);
        self
    }

    /// Vertical [`Adjustment`][crate::Adjustment] of the scrollable widget.
    ///
    /// This adjustment is shared between the scrollable widget and its parent.
    pub fn vadjustment<P: IsA<Adjustment>>(mut self, vadjustment: &P) -> Self {
        self.vadjustment = Some(vadjustment.clone().upcast());
        self
    }

    /// Determines when vertical scrolling should start.
    pub fn vscroll_policy(mut self, vscroll_policy: ScrollablePolicy) -> Self {
        self.vscroll_policy = Some(vscroll_policy);
        self
    }
}

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