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

use glib::{
    prelude::*,
    signal::{connect_raw, SignalHandlerId},
    translate::*,
};
use std::{boxed::Box as Box_, fmt, mem::transmute};

glib::wrapper! {
    /// A [`MapListModel`][crate::MapListModel] maps the items in a list model to different items.
    ///
    /// [`MapListModel`][crate::MapListModel] uses a `callback::Gtk::MapListModelMapFunc.
    ///
    /// Example: Create a list of `GtkEventControllers`
    /// **⚠️ The following code is in c ⚠️**
    ///
    /// ```c
    /// static gpointer
    /// map_to_controllers (gpointer widget,
    ///                     gpointer data)
    /// {
    ///   gpointer result = gtk_widget_observe_controllers (widget);
    ///   g_object_unref (widget);
    ///   return result;
    /// }
    ///
    /// widgets = gtk_widget_observe_children (widget);
    ///
    /// controllers = gtk_map_list_model_new (widgets,
    ///                                       map_to_controllers,
    ///                                       NULL, NULL);
    ///
    /// model = gtk_flatten_list_model_new (GTK_TYPE_EVENT_CONTROLLER,
    ///                                     controllers);
    /// ```
    ///
    /// [`MapListModel`][crate::MapListModel] will attempt to discard the mapped objects as soon as
    /// they are no longer needed and recreate them if necessary.
    ///
    /// ## Properties
    ///
    ///
    /// #### `has-map`
    ///  If a map is set for this model
    ///
    /// Readable
    ///
    ///
    /// #### `item-type`
    ///  The type of items. See [`ListModelExtManual::item_type()`][crate::gio::prelude::ListModelExtManual::item_type()].
    ///
    /// Readable
    ///
    ///
    /// #### `model`
    ///  The model being mapped.
    ///
    /// Readable | Writeable | Construct Only
    ///
    ///
    /// #### `n-items`
    ///  The number of items. See [`ListModelExtManual::n_items()`][crate::gio::prelude::ListModelExtManual::n_items()].
    ///
    /// Readable
    ///
    /// # Implements
    ///
    /// [`trait@glib::ObjectExt`], [`trait@gio::prelude::ListModelExt`]
    #[doc(alias = "GtkMapListModel")]
    pub struct MapListModel(Object<ffi::GtkMapListModel, ffi::GtkMapListModelClass>) @implements gio::ListModel;

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

impl MapListModel {
    /// Creates a new [`MapListModel`][crate::MapListModel] for the given arguments.
    /// ## `model`
    /// The model to map
    /// ## `map_func`
    /// map function
    ///
    /// # Returns
    ///
    /// a new [`MapListModel`][crate::MapListModel]
    #[doc(alias = "gtk_map_list_model_new")]
    pub fn new<P: Fn(&glib::Object) -> glib::Object + 'static>(
        model: Option<impl IsA<gio::ListModel>>,
        map_func: P,
    ) -> MapListModel {
        assert_initialized_main_thread!();
        let map_func_data: Box_<P> = Box_::new(map_func);
        unsafe extern "C" fn map_func_func<P: Fn(&glib::Object) -> glib::Object + 'static>(
            item: *mut glib::gobject_ffi::GObject,
            user_data: glib::ffi::gpointer,
        ) -> *mut glib::gobject_ffi::GObject {
            let item = from_glib_full(item);
            let callback: &P = &*(user_data as *mut _);
            (*callback)(&item).to_glib_full()
        }
        let map_func = Some(map_func_func::<P> as _);
        unsafe extern "C" fn user_destroy_func<P: Fn(&glib::Object) -> glib::Object + 'static>(
            data: glib::ffi::gpointer,
        ) {
            let _callback: Box_<P> = Box_::from_raw(data as *mut _);
        }
        let destroy_call3 = Some(user_destroy_func::<P> as _);
        let super_callback0: Box_<P> = map_func_data;
        unsafe {
            from_glib_full(ffi::gtk_map_list_model_new(
                model.map(|p| p.upcast()).into_glib_ptr(),
                map_func,
                Box_::into_raw(super_callback0) as *mut _,
                destroy_call3,
            ))
        }
    }

    /// Gets the model that is currently being mapped or [`None`] if none.
    ///
    /// # Returns
    ///
    /// The model that gets mapped
    #[doc(alias = "gtk_map_list_model_get_model")]
    #[doc(alias = "get_model")]
    pub fn model(&self) -> Option<gio::ListModel> {
        unsafe { from_glib_none(ffi::gtk_map_list_model_get_model(self.to_glib_none().0)) }
    }

    /// Checks if a map function is currently set on @self.
    ///
    /// # Returns
    ///
    /// [`true`] if a map function is set
    #[doc(alias = "gtk_map_list_model_has_map")]
    pub fn has_map(&self) -> bool {
        unsafe { from_glib(ffi::gtk_map_list_model_has_map(self.to_glib_none().0)) }
    }

    /// Sets the function used to map items.
    ///
    /// The function will be called whenever an item needs to be mapped
    /// and must return the item to use for the given input item.
    ///
    /// Note that [`MapListModel`][crate::MapListModel] may call this function multiple times
    /// on the same item, because it may delete items it doesn't need anymore.
    ///
    /// GTK makes no effort to ensure that @map_func conforms to the item type
    /// of @self. It assumes that the caller knows what they are doing and the map
    /// function returns items of the appropriate type.
    /// ## `map_func`
    /// map function
    #[doc(alias = "gtk_map_list_model_set_map_func")]
    pub fn set_map_func<P: Fn(&glib::Object) -> glib::Object + 'static>(&self, map_func: P) {
        let map_func_data: Box_<P> = Box_::new(map_func);
        unsafe extern "C" fn map_func_func<P: Fn(&glib::Object) -> glib::Object + 'static>(
            item: *mut glib::gobject_ffi::GObject,
            user_data: glib::ffi::gpointer,
        ) -> *mut glib::gobject_ffi::GObject {
            let item = from_glib_full(item);
            let callback: &P = &*(user_data as *mut _);
            (*callback)(&item).to_glib_full()
        }
        let map_func = Some(map_func_func::<P> as _);
        unsafe extern "C" fn user_destroy_func<P: Fn(&glib::Object) -> glib::Object + 'static>(
            data: glib::ffi::gpointer,
        ) {
            let _callback: Box_<P> = Box_::from_raw(data as *mut _);
        }
        let destroy_call3 = Some(user_destroy_func::<P> as _);
        let super_callback0: Box_<P> = map_func_data;
        unsafe {
            ffi::gtk_map_list_model_set_map_func(
                self.to_glib_none().0,
                map_func,
                Box_::into_raw(super_callback0) as *mut _,
                destroy_call3,
            );
        }
    }

    /// Sets the model to be mapped.
    ///
    /// GTK makes no effort to ensure that @model conforms to the item type
    /// expected by the map function. It assumes that the caller knows what
    /// they are doing and have set up an appropriate map function.
    /// ## `model`
    /// The model to be mapped
    #[doc(alias = "gtk_map_list_model_set_model")]
    pub fn set_model(&self, model: Option<&impl IsA<gio::ListModel>>) {
        unsafe {
            ffi::gtk_map_list_model_set_model(
                self.to_glib_none().0,
                model.map(|p| p.as_ref()).to_glib_none().0,
            );
        }
    }

    #[doc(alias = "has-map")]
    pub fn connect_has_map_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_has_map_trampoline<F: Fn(&MapListModel) + 'static>(
            this: *mut ffi::GtkMapListModel,
            _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::has-map\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_has_map_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

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