// 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::transmute;
use EventController;
use Gesture;
use GestureDrag;
use GestureSingle;
use Orientation;
use PanDirection;
use PropagationPhase;
use Widget;

glib_wrapper! {
    /// `GesturePan` is a `Gesture` implementation able to recognize
    /// pan gestures, those are drags that are locked to happen along one
    /// axis. The axis that a `GesturePan` handles is defined at
    /// construct time, and can be changed through
    /// `GesturePan::set_orientation`.
    ///
    /// When the gesture starts to be recognized, `GesturePan` will
    /// attempt to determine as early as possible whether the sequence
    /// is moving in the expected direction, and denying the sequence if
    /// this does not happen.
    ///
    /// Once a panning gesture along the expected axis is recognized,
    /// the `GesturePan::pan` signal will be emitted as input events
    /// are received, containing the offset in the given axis.
    ///
    /// # Implements
    ///
    /// [`GestureDragExt`](trait.GestureDragExt.html), [`GestureSingleExt`](trait.GestureSingleExt.html), [`GestureExt`](trait.GestureExt.html), [`EventControllerExt`](trait.EventControllerExt.html), [`glib::object::ObjectExt`](../glib/object/trait.ObjectExt.html)
    pub struct GesturePan(Object<gtk_sys::GtkGesturePan, gtk_sys::GtkGesturePanClass, GesturePanClass>) @extends GestureDrag, GestureSingle, Gesture, EventController;

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

impl GesturePan {
    /// Returns a newly created `Gesture` that recognizes pan gestures.
    /// ## `widget`
    /// a `Widget`
    /// ## `orientation`
    /// expected orientation
    ///
    /// # Returns
    ///
    /// a newly created `GesturePan`
    pub fn new<P: IsA<Widget>>(widget: &P, orientation: Orientation) -> GesturePan {
        skip_assert_initialized!();
        unsafe {
            Gesture::from_glib_full(gtk_sys::gtk_gesture_pan_new(
                widget.as_ref().to_glib_none().0,
                orientation.to_glib(),
            ))
            .unsafe_cast()
        }
    }

    /// Returns the orientation of the pan gestures that this `self` expects.
    ///
    /// # Returns
    ///
    /// the expected orientation for pan gestures
    pub fn get_orientation(&self) -> Orientation {
        unsafe {
            from_glib(gtk_sys::gtk_gesture_pan_get_orientation(
                self.to_glib_none().0,
            ))
        }
    }

    /// Sets the orientation to be expected on pan gestures.
    /// ## `orientation`
    /// expected orientation
    pub fn set_orientation(&self, orientation: Orientation) {
        unsafe {
            gtk_sys::gtk_gesture_pan_set_orientation(self.to_glib_none().0, orientation.to_glib());
        }
    }

    /// This signal is emitted once a panning gesture along the
    /// expected axis is detected.
    /// ## `direction`
    /// current direction of the pan gesture
    /// ## `offset`
    /// Offset along the gesture orientation
    pub fn connect_pan<F: Fn(&GesturePan, PanDirection, f64) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn pan_trampoline<F: Fn(&GesturePan, PanDirection, f64) + 'static>(
            this: *mut gtk_sys::GtkGesturePan,
            direction: gtk_sys::GtkPanDirection,
            offset: libc::c_double,
            f: glib_sys::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this), from_glib(direction), offset)
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"pan\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    pan_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    pub fn connect_property_orientation_notify<F: Fn(&GesturePan) + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn notify_orientation_trampoline<F: Fn(&GesturePan) + 'static>(
            this: *mut gtk_sys::GtkGesturePan,
            _param_spec: glib_sys::gpointer,
            f: glib_sys::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::orientation\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_orientation_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

#[derive(Clone, Default)]
pub struct GesturePanBuilder {
    orientation: Option<Orientation>,
    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 GesturePanBuilder {
    pub fn new() -> Self {
        Self::default()
    }

    pub fn build(self) -> GesturePan {
        let mut properties: Vec<(&str, &dyn ToValue)> = vec![];
        if let Some(ref orientation) = self.orientation {
            properties.push(("orientation", orientation));
        }
        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(GesturePan::static_type(), &properties)
            .expect("object new")
            .downcast::<GesturePan>()
            .expect("downcast");
        ret
    }

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

    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 GesturePan {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "GesturePan")
    }
}