// 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::EventController;
use crate::PropagationLimit;
use crate::PropagationPhase;
use glib::object::Cast;
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! {
    /// [`DropTargetAsync`][crate::DropTargetAsync] is an event controller to receive Drag-and-Drop
    /// operations, asynchronously.
    ///
    /// It is the more complete but also more complex method of handling drop
    /// operations compared to [`DropTarget`][crate::DropTarget], and you should only use
    /// it if [`DropTarget`][crate::DropTarget] doesn't provide all the features you need.
    ///
    /// To use a [`DropTargetAsync`][crate::DropTargetAsync] to receive drops on a widget, you create
    /// a [`DropTargetAsync`][crate::DropTargetAsync] object, configure which data formats and actions
    /// you support, connect to its signals, and then attach it to the widget
    /// with [``WidgetExt::add_controller()``][crate::prelude::`WidgetExt::add_controller()`].
    ///
    /// During a drag operation, the first signal that a [`DropTargetAsync`][crate::DropTargetAsync]
    /// emits is `signal::DropTargetAsync::accept`, which is meant to determine
    /// whether the target is a possible drop site for the ongoing drop. The
    /// default handler for the ::accept signal accepts the drop if it finds
    /// a compatible data format and an action that is supported on both sides.
    ///
    /// If it is, and the widget becomes a target, you will receive a
    /// `signal::DropTargetAsync::drag-enter` signal, followed by
    /// `signal::DropTargetAsync::drag-motion` signals as the pointer moves,
    /// optionally a `signal::DropTargetAsync::drop` signal when a drop happens,
    /// and finally a `signal::DropTargetAsync::drag-leave` signal when the
    /// pointer moves off the widget.
    ///
    /// The ::drag-enter and ::drag-motion handler return a [`gdk::DragAction`][crate::gdk::DragAction]
    /// to update the status of the ongoing operation. The ::drop handler
    /// should decide if it ultimately accepts the drop and if it does, it
    /// should initiate the data transfer and finish the operation by calling
    /// [``Drop::finish()``][crate::gdk::`Drop::finish()`].
    ///
    /// Between the ::drag-enter and ::drag-leave signals the widget is a
    /// current drop target, and will receive the [`StateFlags::DROP_ACTIVE`][crate::StateFlags::DROP_ACTIVE]
    /// state, which can be used by themes to style the widget as a drop target.
    ///
    /// # Implements
    ///
    /// [`EventControllerExt`][trait@crate::prelude::EventControllerExt], [`trait@glib::ObjectExt`]
    #[doc(alias = "GtkDropTargetAsync")]
    pub struct DropTargetAsync(Object<ffi::GtkDropTargetAsync, ffi::GtkDropTargetAsyncClass>) @extends EventController;

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

impl DropTargetAsync {
    /// Creates a new [`DropTargetAsync`][crate::DropTargetAsync] object.
    /// ## `formats`
    /// the supported data formats
    /// ## `actions`
    /// the supported actions
    ///
    /// # Returns
    ///
    /// the new [`DropTargetAsync`][crate::DropTargetAsync]
    #[doc(alias = "gtk_drop_target_async_new")]
    pub fn new(formats: Option<&gdk::ContentFormats>, actions: gdk::DragAction) -> DropTargetAsync {
        assert_initialized_main_thread!();
        unsafe {
            from_glib_full(ffi::gtk_drop_target_async_new(
                formats.to_glib_full(),
                actions.into_glib(),
            ))
        }
    }

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

    /// Gets the actions that this drop target supports.
    ///
    /// # Returns
    ///
    /// the actions that this drop target supports
    #[doc(alias = "gtk_drop_target_async_get_actions")]
    #[doc(alias = "get_actions")]
    pub fn actions(&self) -> gdk::DragAction {
        unsafe {
            from_glib(ffi::gtk_drop_target_async_get_actions(
                self.to_glib_none().0,
            ))
        }
    }

    /// Gets the data formats that this drop target accepts.
    ///
    /// If the result is [`None`], all formats are expected to be supported.
    ///
    /// # Returns
    ///
    /// the supported data formats
    #[doc(alias = "gtk_drop_target_async_get_formats")]
    #[doc(alias = "get_formats")]
    pub fn formats(&self) -> Option<gdk::ContentFormats> {
        unsafe {
            from_glib_full(ffi::gtk_drop_target_async_get_formats(
                self.to_glib_none().0,
            ))
        }
    }

    /// Sets the `drop` as not accepted on this drag site.
    ///
    /// This function should be used when delaying the decision
    /// on whether to accept a drag or not until after reading
    /// the data.
    /// ## `drop`
    /// the [`gdk::Drop`][crate::gdk::Drop] of an ongoing drag operation
    #[doc(alias = "gtk_drop_target_async_reject_drop")]
    pub fn reject_drop(&self, drop: &gdk::Drop) {
        unsafe {
            ffi::gtk_drop_target_async_reject_drop(self.to_glib_none().0, drop.to_glib_none().0);
        }
    }

    /// Sets the actions that this drop target supports.
    /// ## `actions`
    /// the supported actions
    #[doc(alias = "gtk_drop_target_async_set_actions")]
    pub fn set_actions(&self, actions: gdk::DragAction) {
        unsafe {
            ffi::gtk_drop_target_async_set_actions(self.to_glib_none().0, actions.into_glib());
        }
    }

    /// Sets the data formats that this drop target will accept.
    /// ## `formats`
    /// the supported data formats or [`None`] for any format
    #[doc(alias = "gtk_drop_target_async_set_formats")]
    pub fn set_formats(&self, formats: Option<&gdk::ContentFormats>) {
        unsafe {
            ffi::gtk_drop_target_async_set_formats(self.to_glib_none().0, formats.to_glib_none().0);
        }
    }

    /// Emitted on the drop site when a drop operation is about to begin.
    ///
    /// If the drop is not accepted, [`false`] will be returned and the drop target
    /// will ignore the drop. If [`true`] is returned, the drop is accepted for now
    /// but may be rejected later via a call to [``reject_drop()``][`Self::reject_drop()`]
    /// or ultimately by returning [`false`] from a `signal::DropTargetAsync::drop`
    /// handler.
    ///
    /// The default handler for this signal decides whether to accept the drop
    /// based on the formats provided by the `drop`.
    ///
    /// If the decision whether the drop will be accepted or rejected needs
    /// further processing, such as inspecting the data, this function should
    /// return [`true`] and proceed as is `drop` was accepted and if it decides to
    /// reject the drop later, it should call [``reject_drop()``][`Self::reject_drop()`].
    /// ## `drop`
    /// the [`gdk::Drop`][crate::gdk::Drop]
    ///
    /// # Returns
    ///
    /// [`true`] if `drop` is accepted
    #[doc(alias = "accept")]
    pub fn connect_accept<F: Fn(&Self, &gdk::Drop) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn accept_trampoline<
            F: Fn(&DropTargetAsync, &gdk::Drop) -> bool + 'static,
        >(
            this: *mut ffi::GtkDropTargetAsync,
            drop: *mut gdk::ffi::GdkDrop,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this), &from_glib_borrow(drop)).into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"accept\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    accept_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// Emitted on the drop site when the pointer enters the widget.
    ///
    /// It can be used to set up custom highlighting.
    /// ## `drop`
    /// the [`gdk::Drop`][crate::gdk::Drop]
    /// ## `x`
    /// the x coordinate of the current pointer position
    /// ## `y`
    /// the y coordinate of the current pointer position
    ///
    /// # Returns
    ///
    /// Preferred action for this drag operation.
    #[doc(alias = "drag-enter")]
    pub fn connect_drag_enter<F: Fn(&Self, &gdk::Drop, f64, f64) -> gdk::DragAction + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn drag_enter_trampoline<
            F: Fn(&DropTargetAsync, &gdk::Drop, f64, f64) -> gdk::DragAction + 'static,
        >(
            this: *mut ffi::GtkDropTargetAsync,
            drop: *mut gdk::ffi::GdkDrop,
            x: libc::c_double,
            y: libc::c_double,
            f: glib::ffi::gpointer,
        ) -> gdk::ffi::GdkDragAction {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this), &from_glib_borrow(drop), x, y).into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"drag-enter\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    drag_enter_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// Emitted on the drop site when the pointer leaves the widget.
    ///
    /// Its main purpose it to undo things done in
    /// [`DropTargetAsync`][crate::DropTargetAsync]::drag-enter.
    /// ## `drop`
    /// the [`gdk::Drop`][crate::gdk::Drop]
    #[doc(alias = "drag-leave")]
    pub fn connect_drag_leave<F: Fn(&Self, &gdk::Drop) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn drag_leave_trampoline<
            F: Fn(&DropTargetAsync, &gdk::Drop) + 'static,
        >(
            this: *mut ffi::GtkDropTargetAsync,
            drop: *mut gdk::ffi::GdkDrop,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this), &from_glib_borrow(drop))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"drag-leave\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    drag_leave_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// Emitted while the pointer is moving over the drop target.
    /// ## `drop`
    /// the [`gdk::Drop`][crate::gdk::Drop]
    /// ## `x`
    /// the x coordinate of the current pointer position
    /// ## `y`
    /// the y coordinate of the current pointer position
    ///
    /// # Returns
    ///
    /// Preferred action for this drag operation.
    #[doc(alias = "drag-motion")]
    pub fn connect_drag_motion<F: Fn(&Self, &gdk::Drop, f64, f64) -> gdk::DragAction + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn drag_motion_trampoline<
            F: Fn(&DropTargetAsync, &gdk::Drop, f64, f64) -> gdk::DragAction + 'static,
        >(
            this: *mut ffi::GtkDropTargetAsync,
            drop: *mut gdk::ffi::GdkDrop,
            x: libc::c_double,
            y: libc::c_double,
            f: glib::ffi::gpointer,
        ) -> gdk::ffi::GdkDragAction {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this), &from_glib_borrow(drop), x, y).into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"drag-motion\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    drag_motion_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    /// Emitted on the drop site when the user drops the data onto the widget.
    ///
    /// The signal handler must determine whether the pointer position is in a
    /// drop zone or not. If it is not in a drop zone, it returns [`false`] and no
    /// further processing is necessary.
    ///
    /// Otherwise, the handler returns [`true`]. In this case, this handler will
    /// accept the drop. The handler must ensure that [``Drop::finish()``][crate::gdk::`Drop::finish()`]
    /// is called to let the source know that the drop is done. The call to
    /// [``Drop::finish()``][crate::gdk::`Drop::finish()`] must only be done when all data has been received.
    ///
    /// To receive the data, use one of the read functions provided by
    /// [`gdk::Drop`][crate::gdk::Drop] such as [``Drop::read_async()``][crate::gdk::`Drop::read_async()`] or
    /// [``Drop::read_value_async()``][crate::gdk::`Drop::read_value_async()`].
    /// ## `drop`
    /// the [`gdk::Drop`][crate::gdk::Drop]
    /// ## `x`
    /// the x coordinate of the current pointer position
    /// ## `y`
    /// the y coordinate of the current pointer position
    ///
    /// # Returns
    ///
    /// whether the drop is accepted at the given pointer position
    #[doc(alias = "drop")]
    pub fn connect_drop<F: Fn(&Self, &gdk::Drop, f64, f64) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn drop_trampoline<
            F: Fn(&DropTargetAsync, &gdk::Drop, f64, f64) -> bool + 'static,
        >(
            this: *mut ffi::GtkDropTargetAsync,
            drop: *mut gdk::ffi::GdkDrop,
            x: libc::c_double,
            y: libc::c_double,
            f: glib::ffi::gpointer,
        ) -> glib::ffi::gboolean {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this), &from_glib_borrow(drop), x, y).into_glib()
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"drop\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    drop_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

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

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

impl Default for DropTargetAsync {
    fn default() -> Self {
        glib::object::Object::new::<Self>(&[])
            .expect("Can't construct DropTargetAsync object with default parameters")
    }
}

#[derive(Clone, Default)]
// rustdoc-stripper-ignore-next
/// A [builder-pattern] type to construct [`DropTargetAsync`] objects.
///
/// [builder-pattern]: https://doc.rust-lang.org/1.0.0/style/ownership/builders.html
pub struct DropTargetAsyncBuilder {
    actions: Option<gdk::DragAction>,
    formats: Option<gdk::ContentFormats>,
    name: Option<String>,
    propagation_limit: Option<PropagationLimit>,
    propagation_phase: Option<PropagationPhase>,
}

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

    // rustdoc-stripper-ignore-next
    /// Build the [`DropTargetAsync`].
    pub fn build(self) -> DropTargetAsync {
        let mut properties: Vec<(&str, &dyn ToValue)> = vec![];
        if let Some(ref actions) = self.actions {
            properties.push(("actions", actions));
        }
        if let Some(ref formats) = self.formats {
            properties.push(("formats", formats));
        }
        if let Some(ref name) = self.name {
            properties.push(("name", name));
        }
        if let Some(ref propagation_limit) = self.propagation_limit {
            properties.push(("propagation-limit", propagation_limit));
        }
        if let Some(ref propagation_phase) = self.propagation_phase {
            properties.push(("propagation-phase", propagation_phase));
        }
        glib::Object::new::<DropTargetAsync>(&properties)
            .expect("Failed to create an instance of DropTargetAsync")
    }

    /// The `GdkDragActions` that this drop target supports.
    pub fn actions(mut self, actions: gdk::DragAction) -> Self {
        self.actions = Some(actions);
        self
    }

    /// The [`gdk::ContentFormats`][crate::gdk::ContentFormats] that determines the supported data formats.
    pub fn formats(mut self, formats: &gdk::ContentFormats) -> Self {
        self.formats = Some(formats.clone());
        self
    }

    /// The name for this controller, typically used for debugging purposes.
    pub fn name(mut self, name: &str) -> Self {
        self.name = Some(name.to_string());
        self
    }

    /// The limit for which events this controller will handle.
    pub fn propagation_limit(mut self, propagation_limit: PropagationLimit) -> Self {
        self.propagation_limit = Some(propagation_limit);
        self
    }

    /// The propagation phase at which this controller will handle events.
    pub fn propagation_phase(mut self, propagation_phase: PropagationPhase) -> Self {
        self.propagation_phase = Some(propagation_phase);
        self
    }
}

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