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// Take a look at the license at the top of the repository in the LICENSE file.

use glib::translate::*;

/// Used for button press and button release events. The
/// `type` field will be one of [`EventType::ButtonPress`][crate::EventType::ButtonPress],
/// [`EventType::_2buttonPress`][crate::EventType::_2buttonPress], [`EventType::_3buttonPress`][crate::EventType::_3buttonPress] or [`EventType::ButtonRelease`][crate::EventType::ButtonRelease],
///
/// Double and triple-clicks result in a sequence of events being received.
/// For double-clicks the order of events will be:
///
/// - [`EventType::ButtonPress`][crate::EventType::ButtonPress]
/// - [`EventType::ButtonRelease`][crate::EventType::ButtonRelease]
/// - [`EventType::ButtonPress`][crate::EventType::ButtonPress]
/// - [`EventType::_2buttonPress`][crate::EventType::_2buttonPress]
/// - [`EventType::ButtonRelease`][crate::EventType::ButtonRelease]
///
/// Note that the first click is received just like a normal
/// button press, while the second click results in a [`EventType::_2buttonPress`][crate::EventType::_2buttonPress]
/// being received just after the [`EventType::ButtonPress`][crate::EventType::ButtonPress].
///
/// Triple-clicks are very similar to double-clicks, except that
/// [`EventType::_3buttonPress`][crate::EventType::_3buttonPress] is inserted after the third click. The order of the
/// events is:
///
/// - [`EventType::ButtonPress`][crate::EventType::ButtonPress]
/// - [`EventType::ButtonRelease`][crate::EventType::ButtonRelease]
/// - [`EventType::ButtonPress`][crate::EventType::ButtonPress]
/// - [`EventType::_2buttonPress`][crate::EventType::_2buttonPress]
/// - [`EventType::ButtonRelease`][crate::EventType::ButtonRelease]
/// - [`EventType::ButtonPress`][crate::EventType::ButtonPress]
/// - [`EventType::_3buttonPress`][crate::EventType::_3buttonPress]
/// - [`EventType::ButtonRelease`][crate::EventType::ButtonRelease]
///
/// For a double click to occur, the second button press must occur within
/// 1/4 of a second of the first. For a triple click to occur, the third
/// button press must also occur within 1/2 second of the first button press.
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct EventButton(crate::Event);

event_wrapper!(EventButton, GdkEventButton);
event_subtype!(
    EventButton,
    ffi::GDK_BUTTON_PRESS
        | ffi::GDK_DOUBLE_BUTTON_PRESS
        | ffi::GDK_TRIPLE_BUTTON_PRESS
        | ffi::GDK_BUTTON_RELEASE
);

impl EventButton {
    #[doc(alias = "get_position")]
    pub fn position(&self) -> (f64, f64) {
        let x = self.as_ref().x;
        let y = self.as_ref().y;
        (x, y)
    }

    #[doc(alias = "get_state")]
    pub fn state(&self) -> crate::ModifierType {
        unsafe { from_glib(self.as_ref().state) }
    }

    #[doc(alias = "get_time")]
    pub fn time(&self) -> u32 {
        self.as_ref().time
    }

    #[doc(alias = "get_button")]
    pub fn button(&self) -> u32 {
        self.as_ref().button
    }

    #[doc(alias = "get_device")]
    pub fn device(&self) -> Option<crate::Device> {
        unsafe { from_glib_none(self.as_ref().device) }
    }

    #[doc(alias = "get_axes")]
    pub fn axes(&self) -> Option<(f64, f64)> {
        let axes = self.as_ref().axes;

        if axes.is_null() {
            None
        } else {
            unsafe { Some((*axes, *axes.offset(1))) }
        }
    }

    #[doc(alias = "get_root")]
    pub fn root(&self) -> (f64, f64) {
        let x_root = self.as_ref().x_root;
        let y_root = self.as_ref().y_root;
        (x_root, y_root)
    }
}