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

use crate::ChildProxy;
use crate::Element;
#[cfg(any(feature = "v1_10", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
use crate::ElementFlags;
use crate::Object;
use crate::Pad;
use crate::PadDirection;
use glib::object::Cast;
use glib::object::IsA;
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::mem::transmute;

glib::wrapper! {
    /// [`Bin`][crate::Bin] is an element that can contain other [`Element`][crate::Element], allowing them to be
    /// managed as a group.
    /// Pads from the child elements can be ghosted to the bin, see [`GhostPad`][crate::GhostPad].
    /// This makes the bin look like any other elements and enables creation of
    /// higher-level abstraction elements.
    ///
    /// A new [`Bin`][crate::Bin] is created with [`new()`][Self::new()]. Use a [`Pipeline`][crate::Pipeline] instead if you
    /// want to create a toplevel bin because a normal bin doesn't have a bus or
    /// handle clock distribution of its own.
    ///
    /// After the bin has been created you will typically add elements to it with
    /// [`GstBinExt::add()`][crate::prelude::GstBinExt::add()]. You can remove elements with [`GstBinExt::remove()`][crate::prelude::GstBinExt::remove()].
    ///
    /// An element can be retrieved from a bin with [`GstBinExt::by_name()`][crate::prelude::GstBinExt::by_name()], using the
    /// elements name. [`GstBinExt::by_name_recurse_up()`][crate::prelude::GstBinExt::by_name_recurse_up()] is mainly used for internal
    /// purposes and will query the parent bins when the element is not found in the
    /// current bin.
    ///
    /// An iterator of elements in a bin can be retrieved with
    /// [`GstBinExtManual::iterate_elements()`][crate::prelude::GstBinExtManual::iterate_elements()]. Various other iterators exist to retrieve the
    /// elements in a bin.
    ///
    /// `gst_object_unref()` is used to drop your reference to the bin.
    ///
    /// The `signal::Bin::element-added` signal is fired whenever a new element is added to
    /// the bin. Likewise the `signal::Bin::element-removed` signal is fired whenever an
    /// element is removed from the bin.
    ///
    /// A [`Bin`][crate::Bin] internally intercepts every [`Message`][crate::Message] posted by its children and
    /// implements the following default behaviour for each of them:
    ///
    /// * `GST_MESSAGE_EOS`: This message is only posted by sinks in the PLAYING
    /// state. If all sinks posted the EOS message, this bin will post and EOS
    /// message upwards.
    ///
    /// * `GST_MESSAGE_SEGMENT_START`: Just collected and never forwarded upwards.
    ///  The messages are used to decide when all elements have completed playback
    ///  of their segment.
    ///
    /// * `GST_MESSAGE_SEGMENT_DONE`: Is posted by [`Bin`][crate::Bin] when all elements that posted
    ///  a SEGMENT_START have posted a SEGMENT_DONE.
    ///
    /// * `GST_MESSAGE_DURATION_CHANGED`: Is posted by an element that detected a change
    ///  in the stream duration. The duration change is posted to the
    ///  application so that it can refetch the new duration with a duration
    ///  query.
    ///
    ///  Note that these messages can be posted before the bin is prerolled, in which
    ///  case the duration query might fail.
    ///
    ///  Note also that there might be a discrepancy (due to internal buffering/queueing)
    ///  between the stream being currently displayed and the returned duration query.
    ///
    ///  Applications might want to also query for duration (and changes) by
    ///  listening to the `GST_MESSAGE_STREAM_START` message, signaling the active start
    ///  of a (new) stream.
    ///
    /// * `GST_MESSAGE_CLOCK_LOST`: This message is posted by an element when it
    ///  can no longer provide a clock.
    ///
    ///  The default bin behaviour is to check if the lost clock was the one provided
    ///  by the bin. If so and the bin is currently in the PLAYING state, the message
    ///  is forwarded to the bin parent.
    ///
    ///  This message is also generated when a clock provider is removed from
    ///  the bin. If this message is received by the application, it should
    ///  PAUSE the pipeline and set it back to PLAYING to force a new clock
    ///  distribution.
    ///
    /// * `GST_MESSAGE_CLOCK_PROVIDE`: This message is generated when an element
    ///  can provide a clock. This mostly happens when a new clock
    ///  provider is added to the bin.
    ///
    ///  The default behaviour of the bin is to mark the currently selected clock as
    ///  dirty, which will perform a clock recalculation the next time the bin is
    ///  asked to provide a clock.
    ///
    ///  This message is never sent to the application but is forwarded to
    ///  the parent of the bin.
    ///
    /// * OTHERS: posted upwards.
    ///
    /// A [`Bin`][crate::Bin] implements the following default behaviour for answering to a
    /// [`Query`][crate::Query]:
    ///
    /// * `GST_QUERY_DURATION`: The bin will forward the query to all sink
    ///  elements contained within and will return the maximum value.
    ///  If no sinks are available in the bin, the query fails.
    ///
    /// * `GST_QUERY_POSITION`: The query is sent to all sink elements in the bin and the
    ///  MAXIMUM of all values is returned. If no sinks are available in the bin,
    ///  the query fails.
    ///
    /// * OTHERS: the query is forwarded to all sink elements, the result
    ///  of the first sink that answers the query successfully is returned. If no
    ///  sink is in the bin, the query fails.
    ///
    /// A [`Bin`][crate::Bin] will by default forward any event sent to it to all sink
    /// ( [`EventTypeFlags::DOWNSTREAM`][crate::EventTypeFlags::DOWNSTREAM] ) or source ( [`EventTypeFlags::UPSTREAM`][crate::EventTypeFlags::UPSTREAM] ) elements
    /// depending on the event type.
    ///
    /// If all the elements return [`true`], the bin will also return [`true`], else [`false`]
    /// is returned. If no elements of the required type are in the bin, the event
    /// handler will return [`true`].
    ///
    /// # Implements
    ///
    /// [`GstBinExt`][trait@crate::prelude::GstBinExt], [`ElementExt`][trait@crate::prelude::ElementExt], [`GstObjectExt`][trait@crate::prelude::GstObjectExt], [`trait@glib::ObjectExt`], [`ChildProxyExt`][trait@crate::prelude::ChildProxyExt], [`ElementExtManual`][trait@crate::prelude::ElementExtManual], [`ChildProxyExtManual`][trait@crate::prelude::ChildProxyExtManual]
    #[doc(alias = "GstBin")]
    pub struct Bin(Object<ffi::GstBin, ffi::GstBinClass>) @extends Element, Object, @implements ChildProxy;

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

impl Bin {
    /// Creates a new bin with the given name.
    /// ## `name`
    /// the name of the new bin
    ///
    /// # Returns
    ///
    /// a new [`Bin`][crate::Bin]
    #[doc(alias = "gst_bin_new")]
    pub fn new(name: Option<&str>) -> Bin {
        assert_initialized_main_thread!();
        unsafe { Element::from_glib_none(ffi::gst_bin_new(name.to_glib_none().0)).unsafe_cast() }
    }
}

unsafe impl Send for Bin {}
unsafe impl Sync for Bin {}

pub const NONE_BIN: Option<&Bin> = None;

/// Trait containing all [`struct@Bin`] methods.
///
/// # Implementors
///
/// [`Bin`][struct@crate::Bin], [`Pipeline`][struct@crate::Pipeline]
pub trait GstBinExt: 'static {
    /// Adds the given element to the bin. Sets the element's parent, and thus
    /// takes ownership of the element. An element can only be added to one bin.
    ///
    /// If the element's pads are linked to other pads, the pads will be unlinked
    /// before the element is added to the bin.
    ///
    /// > When you add an element to an already-running pipeline, you will have to
    /// > take care to set the state of the newly-added element to the desired
    /// > state (usually PLAYING or PAUSED, same you set the pipeline to originally)
    /// > with [`ElementExt::set_state()`][crate::prelude::ElementExt::set_state()], or use [`ElementExt::sync_state_with_parent()`][crate::prelude::ElementExt::sync_state_with_parent()].
    /// > The bin or pipeline will not take care of this for you.
    /// ## `element`
    /// the [`Element`][crate::Element] to add
    ///
    /// # Returns
    ///
    /// [`true`] if the element could be added, [`false`] if
    /// the bin does not want to accept the element.
    #[doc(alias = "gst_bin_add")]
    fn add<P: IsA<Element>>(&self, element: &P) -> Result<(), glib::error::BoolError>;

    /// Recursively looks for elements with an unlinked pad of the given
    /// direction within the specified bin and returns an unlinked pad
    /// if one is found, or [`None`] otherwise. If a pad is found, the caller
    /// owns a reference to it and should use `gst_object_unref()` on the
    /// pad when it is not needed any longer.
    /// ## `direction`
    /// whether to look for an unlinked source or sink pad
    ///
    /// # Returns
    ///
    /// unlinked pad of the given
    /// direction.
    #[doc(alias = "gst_bin_find_unlinked_pad")]
    fn find_unlinked_pad(&self, direction: PadDirection) -> Option<Pad>;

    /// Looks for an element inside the bin that implements the given
    /// interface. If such an element is found, it returns the element.
    /// You can cast this element to the given interface afterwards. If you want
    /// all elements that implement the interface, use
    /// [`GstBinExtManual::iterate_all_by_interface()`][crate::prelude::GstBinExtManual::iterate_all_by_interface()]. This function recurses into child bins.
    /// ## `iface`
    /// the `GType` of an interface
    ///
    /// # Returns
    ///
    /// A [`Element`][crate::Element] inside the bin
    /// implementing the interface
    #[doc(alias = "gst_bin_get_by_interface")]
    #[doc(alias = "get_by_interface")]
    fn by_interface(&self, iface: glib::types::Type) -> Option<Element>;

    /// Gets the element with the given name from a bin. This
    /// function recurses into child bins.
    /// ## `name`
    /// the element name to search for
    ///
    /// # Returns
    ///
    /// the [`Element`][crate::Element] with the given
    /// name
    #[doc(alias = "gst_bin_get_by_name")]
    #[doc(alias = "get_by_name")]
    fn by_name(&self, name: &str) -> Option<Element>;

    /// Gets the element with the given name from this bin. If the
    /// element is not found, a recursion is performed on the parent bin.
    /// ## `name`
    /// the element name to search for
    ///
    /// # Returns
    ///
    /// the [`Element`][crate::Element] with the given
    /// name
    #[doc(alias = "gst_bin_get_by_name_recurse_up")]
    #[doc(alias = "get_by_name_recurse_up")]
    fn by_name_recurse_up(&self, name: &str) -> Option<Element>;

    ///
    /// # Returns
    ///
    /// the bin's suppressed [`ElementFlags`][crate::ElementFlags].
    #[cfg(any(feature = "v1_10", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
    #[doc(alias = "gst_bin_get_suppressed_flags")]
    #[doc(alias = "get_suppressed_flags")]
    fn suppressed_flags(&self) -> ElementFlags;

    /// Queries `self` for the current latency and reconfigures this latency on all the
    /// elements using a LATENCY event.
    ///
    /// This method is typically called on the pipeline when a `GST_MESSAGE_LATENCY`
    /// is posted on the bus.
    ///
    /// This function simply emits the `signal::Bin::do-latency` signal so any custom latency
    /// calculations will be performed.
    ///
    /// # Returns
    ///
    /// [`true`] if the latency could be queried and reconfigured.
    #[doc(alias = "gst_bin_recalculate_latency")]
    fn recalculate_latency(&self) -> Result<(), glib::error::BoolError>;

    /// Removes the element from the bin, unparenting it as well.
    /// Unparenting the element means that the element will be dereferenced,
    /// so if the bin holds the only reference to the element, the element
    /// will be freed in the process of removing it from the bin. If you
    /// want the element to still exist after removing, you need to call
    /// `gst_object_ref()` before removing it from the bin.
    ///
    /// If the element's pads are linked to other pads, the pads will be unlinked
    /// before the element is removed from the bin.
    /// ## `element`
    /// the [`Element`][crate::Element] to remove
    ///
    /// # Returns
    ///
    /// [`true`] if the element could be removed, [`false`] if
    /// the bin does not want to remove the element.
    #[doc(alias = "gst_bin_remove")]
    fn remove<P: IsA<Element>>(&self, element: &P) -> Result<(), glib::error::BoolError>;

    /// Suppresses the given flags on the bin. [`ElementFlags`][crate::ElementFlags] of a
    /// child element are propagated when it is added to the bin.
    /// When suppressed flags are set, those specified flags will
    /// not be propagated to the bin.
    /// ## `flags`
    /// the [`ElementFlags`][crate::ElementFlags] to suppress
    #[cfg(any(feature = "v1_10", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
    #[doc(alias = "gst_bin_set_suppressed_flags")]
    fn set_suppressed_flags(&self, flags: ElementFlags);

    /// Synchronizes the state of every child of `self` with the state
    /// of `self`. See also [`ElementExt::sync_state_with_parent()`][crate::prelude::ElementExt::sync_state_with_parent()].
    ///
    /// # Returns
    ///
    /// [`true`] if syncing the state was successful for all children,
    ///  otherwise [`false`].
    #[doc(alias = "gst_bin_sync_children_states")]
    fn sync_children_states(&self) -> Result<(), glib::error::BoolError>;

    /// If set to [`true`], the bin will handle asynchronous state changes.
    /// This should be used only if the bin subclass is modifying the state
    /// of its children on its own.
    #[doc(alias = "async-handling")]
    fn is_async_handling(&self) -> bool;

    /// If set to [`true`], the bin will handle asynchronous state changes.
    /// This should be used only if the bin subclass is modifying the state
    /// of its children on its own.
    #[doc(alias = "async-handling")]
    fn set_async_handling(&self, async_handling: bool);

    /// Forward all children messages, even those that would normally be filtered by
    /// the bin. This can be interesting when one wants to be notified of the EOS
    /// state of individual elements, for example.
    ///
    /// The messages are converted to an ELEMENT message with the bin as the
    /// source. The structure of the message is named `GstBinForwarded` and contains
    /// a field named `message` of type `GST_TYPE_MESSAGE` that contains the original
    /// forwarded message.
    #[doc(alias = "message-forward")]
    fn is_message_forward(&self) -> bool;

    /// Forward all children messages, even those that would normally be filtered by
    /// the bin. This can be interesting when one wants to be notified of the EOS
    /// state of individual elements, for example.
    ///
    /// The messages are converted to an ELEMENT message with the bin as the
    /// source. The structure of the message is named `GstBinForwarded` and contains
    /// a field named `message` of type `GST_TYPE_MESSAGE` that contains the original
    /// forwarded message.
    #[doc(alias = "message-forward")]
    fn set_message_forward(&self, message_forward: bool);

    /// Will be emitted after the element was added to `sub_bin`.
    /// ## `sub_bin`
    /// the [`Bin`][crate::Bin] the element was added to
    /// ## `element`
    /// the [`Element`][crate::Element] that was added to `sub_bin`
    #[cfg(any(feature = "v1_10", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
    #[doc(alias = "deep-element-added")]
    fn connect_deep_element_added<F: Fn(&Self, &Bin, &Element) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    /// Will be emitted after the element was removed from `sub_bin`.
    /// ## `sub_bin`
    /// the [`Bin`][crate::Bin] the element was removed from
    /// ## `element`
    /// the [`Element`][crate::Element] that was removed from `sub_bin`
    #[cfg(any(feature = "v1_10", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
    #[doc(alias = "deep-element-removed")]
    fn connect_deep_element_removed<F: Fn(&Self, &Bin, &Element) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    /// Will be emitted after the element was added to the bin.
    /// ## `element`
    /// the [`Element`][crate::Element] that was added to the bin
    #[doc(alias = "element-added")]
    fn connect_element_added<F: Fn(&Self, &Element) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    /// Will be emitted after the element was removed from the bin.
    /// ## `element`
    /// the [`Element`][crate::Element] that was removed from the bin
    #[doc(alias = "element-removed")]
    fn connect_element_removed<F: Fn(&Self, &Element) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    #[doc(alias = "async-handling")]
    fn connect_async_handling_notify<F: Fn(&Self) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    #[doc(alias = "message-forward")]
    fn connect_message_forward_notify<F: Fn(&Self) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;
}

impl<O: IsA<Bin>> GstBinExt for O {
    fn add<P: IsA<Element>>(&self, element: &P) -> Result<(), glib::error::BoolError> {
        unsafe {
            glib::result_from_gboolean!(
                ffi::gst_bin_add(
                    self.as_ref().to_glib_none().0,
                    element.as_ref().to_glib_none().0
                ),
                "Failed to add element"
            )
        }
    }

    fn find_unlinked_pad(&self, direction: PadDirection) -> Option<Pad> {
        unsafe {
            from_glib_full(ffi::gst_bin_find_unlinked_pad(
                self.as_ref().to_glib_none().0,
                direction.into_glib(),
            ))
        }
    }

    fn by_interface(&self, iface: glib::types::Type) -> Option<Element> {
        unsafe {
            from_glib_full(ffi::gst_bin_get_by_interface(
                self.as_ref().to_glib_none().0,
                iface.into_glib(),
            ))
        }
    }

    fn by_name(&self, name: &str) -> Option<Element> {
        unsafe {
            from_glib_full(ffi::gst_bin_get_by_name(
                self.as_ref().to_glib_none().0,
                name.to_glib_none().0,
            ))
        }
    }

    fn by_name_recurse_up(&self, name: &str) -> Option<Element> {
        unsafe {
            from_glib_full(ffi::gst_bin_get_by_name_recurse_up(
                self.as_ref().to_glib_none().0,
                name.to_glib_none().0,
            ))
        }
    }

    #[cfg(any(feature = "v1_10", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
    fn suppressed_flags(&self) -> ElementFlags {
        unsafe {
            from_glib(ffi::gst_bin_get_suppressed_flags(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    fn recalculate_latency(&self) -> Result<(), glib::error::BoolError> {
        unsafe {
            glib::result_from_gboolean!(
                ffi::gst_bin_recalculate_latency(self.as_ref().to_glib_none().0),
                "Failed to recalculate latency"
            )
        }
    }

    fn remove<P: IsA<Element>>(&self, element: &P) -> Result<(), glib::error::BoolError> {
        unsafe {
            glib::result_from_gboolean!(
                ffi::gst_bin_remove(
                    self.as_ref().to_glib_none().0,
                    element.as_ref().to_glib_none().0
                ),
                "Failed to remove element"
            )
        }
    }

    #[cfg(any(feature = "v1_10", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
    fn set_suppressed_flags(&self, flags: ElementFlags) {
        unsafe {
            ffi::gst_bin_set_suppressed_flags(self.as_ref().to_glib_none().0, flags.into_glib());
        }
    }

    fn sync_children_states(&self) -> Result<(), glib::error::BoolError> {
        unsafe {
            glib::result_from_gboolean!(
                ffi::gst_bin_sync_children_states(self.as_ref().to_glib_none().0),
                "Failed to sync children states"
            )
        }
    }

    fn is_async_handling(&self) -> bool {
        unsafe {
            let mut value = glib::Value::from_type(<bool as StaticType>::static_type());
            glib::gobject_ffi::g_object_get_property(
                self.to_glib_none().0 as *mut glib::gobject_ffi::GObject,
                b"async-handling\0".as_ptr() as *const _,
                value.to_glib_none_mut().0,
            );
            value
                .get()
                .expect("Return Value for property `async-handling` getter")
        }
    }

    fn set_async_handling(&self, async_handling: bool) {
        unsafe {
            glib::gobject_ffi::g_object_set_property(
                self.to_glib_none().0 as *mut glib::gobject_ffi::GObject,
                b"async-handling\0".as_ptr() as *const _,
                async_handling.to_value().to_glib_none().0,
            );
        }
    }

    fn is_message_forward(&self) -> bool {
        unsafe {
            let mut value = glib::Value::from_type(<bool as StaticType>::static_type());
            glib::gobject_ffi::g_object_get_property(
                self.to_glib_none().0 as *mut glib::gobject_ffi::GObject,
                b"message-forward\0".as_ptr() as *const _,
                value.to_glib_none_mut().0,
            );
            value
                .get()
                .expect("Return Value for property `message-forward` getter")
        }
    }

    fn set_message_forward(&self, message_forward: bool) {
        unsafe {
            glib::gobject_ffi::g_object_set_property(
                self.to_glib_none().0 as *mut glib::gobject_ffi::GObject,
                b"message-forward\0".as_ptr() as *const _,
                message_forward.to_value().to_glib_none().0,
            );
        }
    }

    #[cfg(any(feature = "v1_10", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
    #[doc(alias = "deep-element-added")]
    fn connect_deep_element_added<F: Fn(&Self, &Bin, &Element) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn deep_element_added_trampoline<
            P: IsA<Bin>,
            F: Fn(&P, &Bin, &Element) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstBin,
            sub_bin: *mut ffi::GstBin,
            element: *mut ffi::GstElement,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                &Bin::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(sub_bin),
                &from_glib_borrow(element),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"deep-element-added\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    deep_element_added_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[cfg(any(feature = "v1_10", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "v1_10")))]
    #[doc(alias = "deep-element-removed")]
    fn connect_deep_element_removed<F: Fn(&Self, &Bin, &Element) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn deep_element_removed_trampoline<
            P: IsA<Bin>,
            F: Fn(&P, &Bin, &Element) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstBin,
            sub_bin: *mut ffi::GstBin,
            element: *mut ffi::GstElement,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                &Bin::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(sub_bin),
                &from_glib_borrow(element),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"deep-element-removed\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    deep_element_removed_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "element-added")]
    fn connect_element_added<F: Fn(&Self, &Element) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn element_added_trampoline<
            P: IsA<Bin>,
            F: Fn(&P, &Element) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstBin,
            element: *mut ffi::GstElement,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                &Bin::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(element),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"element-added\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    element_added_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "element-removed")]
    fn connect_element_removed<F: Fn(&Self, &Element) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn element_removed_trampoline<
            P: IsA<Bin>,
            F: Fn(&P, &Element) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstBin,
            element: *mut ffi::GstElement,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(
                &Bin::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(element),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"element-removed\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    element_removed_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "async-handling")]
    fn connect_async_handling_notify<F: Fn(&Self) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_async_handling_trampoline<
            P: IsA<Bin>,
            F: Fn(&P) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstBin,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&Bin::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::async-handling\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_async_handling_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "message-forward")]
    fn connect_message_forward_notify<F: Fn(&Self) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_message_forward_trampoline<
            P: IsA<Bin>,
            F: Fn(&P) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstBin,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&Bin::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::message-forward\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_message_forward_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}