gtk4/auto/sorter.rs
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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)
// DO NOT EDIT
use crate::{ffi, Ordering, SorterChange, SorterOrder};
use glib::{
prelude::*,
signal::{connect_raw, SignalHandlerId},
translate::*,
};
use std::boxed::Box as Box_;
glib::wrapper! {
/// [`Sorter`][crate::Sorter] is an object to describe sorting criteria.
///
/// Its primary user is [`SortListModel`][crate::SortListModel]
///
/// The model will use a sorter to determine the order in which
/// its items should appear by calling `Gtk::Sorter::compare()`
/// for pairs of items.
///
/// Sorters may change their sorting behavior through their lifetime.
/// In that case, they will emit the [`changed`][struct@crate::Sorter#changed] signal
/// to notify that the sort order is no longer valid and should be updated
/// by calling gtk_sorter_compare() again.
///
/// GTK provides various pre-made sorter implementations for common sorting
/// operations. [`ColumnView`][crate::ColumnView] has built-in support for sorting lists
/// via the [`sorter`][struct@crate::ColumnViewColumn#sorter] property, where the user can
/// change the sorting by clicking on list headers.
///
/// Of course, in particular for large lists, it is also possible to subclass
/// [`Sorter`][crate::Sorter] and provide one's own sorter.
///
/// ## Signals
///
///
/// #### `changed`
/// Emitted whenever the sorter changed.
///
/// Users of the sorter should then update the sort order
/// again via gtk_sorter_compare().
///
/// [`SortListModel`][crate::SortListModel] handles this signal automatically.
///
/// Depending on the @change parameter, it may be possible to update
/// the sort order without a full resorting. Refer to the
/// [`SorterChange`][crate::SorterChange] documentation for details.
///
///
///
/// # Implements
///
/// [`SorterExt`][trait@crate::prelude::SorterExt], [`trait@glib::ObjectExt`]
#[doc(alias = "GtkSorter")]
pub struct Sorter(Object<ffi::GtkSorter, ffi::GtkSorterClass>);
match fn {
type_ => || ffi::gtk_sorter_get_type(),
}
}
impl Sorter {
pub const NONE: Option<&'static Sorter> = None;
}
mod sealed {
pub trait Sealed {}
impl<T: super::IsA<super::Sorter>> Sealed for T {}
}
/// Trait containing all [`struct@Sorter`] methods.
///
/// # Implementors
///
/// [`ColumnViewSorter`][struct@crate::ColumnViewSorter], [`CustomSorter`][struct@crate::CustomSorter], [`MultiSorter`][struct@crate::MultiSorter], [`NumericSorter`][struct@crate::NumericSorter], [`Sorter`][struct@crate::Sorter], [`StringSorter`][struct@crate::StringSorter], [`TreeListRowSorter`][struct@crate::TreeListRowSorter]
pub trait SorterExt: IsA<Sorter> + sealed::Sealed + 'static {
/// Notifies all users of the sorter that it has changed.
///
/// This emits the [`changed`][struct@crate::Sorter#changed] signal. Users
/// of the sorter should then update the sort order via
/// `Gtk::Sorter::compare()`.
///
/// Depending on the @change parameter, it may be possible to
/// update the sort order without a full resorting. Refer to
/// the [`SorterChange`][crate::SorterChange] documentation for details.
///
/// This function is intended for implementers of [`Sorter`][crate::Sorter]
/// subclasses and should not be called from other functions.
/// ## `change`
/// How the sorter changed
#[doc(alias = "gtk_sorter_changed")]
fn changed(&self, change: SorterChange) {
unsafe {
ffi::gtk_sorter_changed(self.as_ref().to_glib_none().0, change.into_glib());
}
}
#[doc(alias = "gtk_sorter_compare")]
fn compare(&self, item1: &impl IsA<glib::Object>, item2: &impl IsA<glib::Object>) -> Ordering {
unsafe {
from_glib(ffi::gtk_sorter_compare(
self.as_ref().to_glib_none().0,
item1.as_ref().to_glib_none().0,
item2.as_ref().to_glib_none().0,
))
}
}
/// Gets the order that @self conforms to.
///
/// See [`SorterOrder`][crate::SorterOrder] for details
/// of the possible return values.
///
/// This function is intended to allow optimizations.
///
/// # Returns
///
/// The order
#[doc(alias = "gtk_sorter_get_order")]
#[doc(alias = "get_order")]
fn order(&self) -> SorterOrder {
unsafe { from_glib(ffi::gtk_sorter_get_order(self.as_ref().to_glib_none().0)) }
}
/// Emitted whenever the sorter changed.
///
/// Users of the sorter should then update the sort order
/// again via gtk_sorter_compare().
///
/// [`SortListModel`][crate::SortListModel] handles this signal automatically.
///
/// Depending on the @change parameter, it may be possible to update
/// the sort order without a full resorting. Refer to the
/// [`SorterChange`][crate::SorterChange] documentation for details.
/// ## `change`
/// how the sorter changed
#[doc(alias = "changed")]
fn connect_changed<F: Fn(&Self, SorterChange) + 'static>(&self, f: F) -> SignalHandlerId {
unsafe extern "C" fn changed_trampoline<
P: IsA<Sorter>,
F: Fn(&P, SorterChange) + 'static,
>(
this: *mut ffi::GtkSorter,
change: ffi::GtkSorterChange,
f: glib::ffi::gpointer,
) {
let f: &F = &*(f as *const F);
f(
Sorter::from_glib_borrow(this).unsafe_cast_ref(),
from_glib(change),
)
}
unsafe {
let f: Box_<F> = Box_::new(f);
connect_raw(
self.as_ptr() as *mut _,
b"changed\0".as_ptr() as *const _,
Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
changed_trampoline::<Self, F> as *const (),
)),
Box_::into_raw(f),
)
}
}
}
impl<O: IsA<Sorter>> SorterExt for O {}