// 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 gdk;
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 glib_sys;
use gtk_sys;
use libc;
use std::boxed::Box as Box_;
use std::fmt;
use std::mem;
use std::mem::transmute;
use EventController;
use Gesture;
use GestureSingle;
use PropagationPhase;
use Widget;

glib_wrapper! {
    /// `GestureSwipe` is a `Gesture` implementation able to recognize
    /// swipes, after a press/move/.../move/release sequence happens, the
    /// `GestureSwipe::swipe` signal will be emitted, providing the velocity
    /// and directionality of the sequence at the time it was lifted.
    ///
    /// If the velocity is desired in intermediate points,
    /// `GestureSwipe::get_velocity` can be called on eg. a
    /// `Gesture::update` handler.
    ///
    /// All velocities are reported in pixels/sec units.
    ///
    /// # Implements
    ///
    /// [`GestureSingleExt`](trait.GestureSingleExt.html), [`GestureExt`](trait.GestureExt.html), [`EventControllerExt`](trait.EventControllerExt.html), [`glib::object::ObjectExt`](../glib/object/trait.ObjectExt.html)
    pub struct GestureSwipe(Object<gtk_sys::GtkGestureSwipe, gtk_sys::GtkGestureSwipeClass, GestureSwipeClass>) @extends GestureSingle, Gesture, EventController;

    match fn {
        get_type => || gtk_sys::gtk_gesture_swipe_get_type(),
    }
}

impl GestureSwipe {
    /// Returns a newly created `Gesture` that recognizes swipes.
    /// ## `widget`
    /// a `Widget`
    ///
    /// # Returns
    ///
    /// a newly created `GestureSwipe`
    pub fn new<P: IsA<Widget>>(widget: &P) -> GestureSwipe {
        skip_assert_initialized!();
        unsafe {
            Gesture::from_glib_full(gtk_sys::gtk_gesture_swipe_new(
                widget.as_ref().to_glib_none().0,
            ))
            .unsafe_cast()
        }
    }

    /// If the gesture is recognized, this function returns `true` and fill in
    /// `velocity_x` and `velocity_y` with the recorded velocity, as per the
    /// last event(s) processed.
    /// ## `velocity_x`
    /// return value for the velocity in the X axis, in pixels/sec
    /// ## `velocity_y`
    /// return value for the velocity in the Y axis, in pixels/sec
    ///
    /// # Returns
    ///
    /// whether velocity could be calculated
    pub fn get_velocity(&self) -> Option<(f64, f64)> {
        unsafe {
            let mut velocity_x = mem::MaybeUninit::uninit();
            let mut velocity_y = mem::MaybeUninit::uninit();
            let ret = from_glib(gtk_sys::gtk_gesture_swipe_get_velocity(
                self.to_glib_none().0,
                velocity_x.as_mut_ptr(),
                velocity_y.as_mut_ptr(),
            ));
            let velocity_x = velocity_x.assume_init();
            let velocity_y = velocity_y.assume_init();
            if ret {
                Some((velocity_x, velocity_y))
            } else {
                None
            }
        }
    }

    /// This signal is emitted when the recognized gesture is finished, velocity
    /// and direction are a product of previously recorded events.
    /// ## `velocity_x`
    /// velocity in the X axis, in pixels/sec
    /// ## `velocity_y`
    /// velocity in the Y axis, in pixels/sec
    pub fn connect_swipe<F: Fn(&GestureSwipe, f64, f64) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn swipe_trampoline<F: Fn(&GestureSwipe, f64, f64) + 'static>(
            this: *mut gtk_sys::GtkGestureSwipe,
            velocity_x: libc::c_double,
            velocity_y: libc::c_double,
            f: glib_sys::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this), velocity_x, velocity_y)
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"swipe\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    swipe_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

#[derive(Clone, Default)]
pub struct GestureSwipeBuilder {
    button: Option<u32>,
    exclusive: Option<bool>,
    touch_only: Option<bool>,
    n_points: Option<u32>,
    window: Option<gdk::Window>,
    propagation_phase: Option<PropagationPhase>,
    widget: Option<Widget>,
}

impl GestureSwipeBuilder {
    pub fn new() -> Self {
        Self::default()
    }

    pub fn build(self) -> GestureSwipe {
        let mut properties: Vec<(&str, &dyn ToValue)> = vec![];
        if let Some(ref button) = self.button {
            properties.push(("button", button));
        }
        if let Some(ref exclusive) = self.exclusive {
            properties.push(("exclusive", exclusive));
        }
        if let Some(ref touch_only) = self.touch_only {
            properties.push(("touch-only", touch_only));
        }
        if let Some(ref n_points) = self.n_points {
            properties.push(("n-points", n_points));
        }
        if let Some(ref window) = self.window {
            properties.push(("window", window));
        }
        if let Some(ref propagation_phase) = self.propagation_phase {
            properties.push(("propagation-phase", propagation_phase));
        }
        if let Some(ref widget) = self.widget {
            properties.push(("widget", widget));
        }
        let ret = glib::Object::new(GestureSwipe::static_type(), &properties)
            .expect("object new")
            .downcast::<GestureSwipe>()
            .expect("downcast");
        ret
    }

    pub fn button(mut self, button: u32) -> Self {
        self.button = Some(button);
        self
    }

    pub fn exclusive(mut self, exclusive: bool) -> Self {
        self.exclusive = Some(exclusive);
        self
    }

    pub fn touch_only(mut self, touch_only: bool) -> Self {
        self.touch_only = Some(touch_only);
        self
    }

    pub fn n_points(mut self, n_points: u32) -> Self {
        self.n_points = Some(n_points);
        self
    }

    pub fn window<P: IsA<gdk::Window>>(mut self, window: &P) -> Self {
        self.window = Some(window.clone().upcast());
        self
    }

    pub fn propagation_phase(mut self, propagation_phase: PropagationPhase) -> Self {
        self.propagation_phase = Some(propagation_phase);
        self
    }

    pub fn widget<P: IsA<Widget>>(mut self, widget: &P) -> Self {
        self.widget = Some(widget.clone().upcast());
        self
    }
}

impl fmt::Display for GestureSwipe {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "GestureSwipe")
    }
}