wlroots 0.4.0

Wayland compositor framework
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//! Handler for tablet pads

use libc;
use wlroots_sys::wlr_input_device;
use wayland_sys::server::WAYLAND_SERVER_HANDLE;

use {compositor,
     input::tablet_pad::{self, TabletPad},
     utils::Handleable};

#[allow(unused_variables)]
pub trait Handler {
    /// Callback that is triggered when a button is pressed on the tablet pad.
    fn on_button(&mut self,
                 compositor_handle: compositor::Handle,
                 tablet_pad_handle: tablet_pad::Handle,
                 event: &tablet_pad::event::Button) {}

    /// Callback that is triggered when the touch strip is used.
    fn on_strip(&mut self,
                compositor_handle: compositor::Handle,
                tablet_pad_handle: tablet_pad::Handle,
                event: &tablet_pad::event::Strip) {}

    /// Callback that is triggered when the ring is touched.
    fn on_ring(&mut self,
               compositor_handle: compositor::Handle,
               tablet_pad_handle: tablet_pad::Handle,
               event: &tablet_pad::event::Ring) {}

    /// Callback that is triggered when the pad device is destroyed.
    fn destroyed(&mut self,
                 compositor_handle: compositor::Handle,
                 tablet_pad_handle: tablet_pad::Handle) {}
}

wayland_listener!(pub(crate) TabletPadWrapper, (TabletPad, Box<Handler>), [
    on_destroy_listener => on_destroy_notify: |this: &mut TabletPadWrapper, data: *mut libc::c_void,|
    unsafe {
        let input_device_ptr = data as *mut wlr_input_device;
        {
            let (ref mut pad, ref mut tablet_pad_handler) = this.data;
            let compositor = match compositor::handle() {
                Some(handle) => handle,
                None => return
            };
            tablet_pad_handler.destroyed(compositor, pad.weak_reference());
        }
        ffi_dispatch!(WAYLAND_SERVER_HANDLE,
                      wl_list_remove,
                      &mut (*this.on_destroy_listener()).link as *mut _ as _);
        ffi_dispatch!(WAYLAND_SERVER_HANDLE,
                      wl_list_remove,
                      &mut (*this.button_listener()).link as *mut _ as _);
        ffi_dispatch!(WAYLAND_SERVER_HANDLE,
                      wl_list_remove,
                      &mut (*this.ring_listener()).link as *mut _ as _);
        ffi_dispatch!(WAYLAND_SERVER_HANDLE,
                      wl_list_remove,
                      &mut (*this.strip_listener()).link as *mut _ as _);
        Box::from_raw((*input_device_ptr).data as *mut TabletPadWrapper);
    };
    button_listener => button_notify: |this: &mut TabletPadWrapper, data: *mut libc::c_void,|
    unsafe {
        let (ref pad, ref mut handler) = this.data;
        let event = tablet_pad::event::Button::from_ptr(data as *mut _);
        let compositor = match compositor::handle() {
            Some(handle) => handle,
            None => return
        };

        handler.on_button(compositor,
                          pad.weak_reference(),
                          &event);
    };
    strip_listener => strip_notify: |this: &mut TabletPadWrapper, data: *mut libc::c_void,|
    unsafe {
        let (ref pad, ref mut handler) = this.data;
        let event = tablet_pad::event::Strip::from_ptr(data as *mut _);
        let compositor = match compositor::handle() {
            Some(handle) => handle,
            None => return
        };

        handler.on_strip(compositor,
                         pad.weak_reference(),
                         &event);
    };
    ring_listener => ring_notify: |this: &mut TabletPadWrapper, data: *mut libc::c_void,|
    unsafe {
        let (ref pad, ref mut handler) = this.data;
        let event = tablet_pad::event::Ring::from_ptr(data as *mut _);
        let compositor = match compositor::handle() {
            Some(handle) => handle,
            None => return
        };

        handler.on_ring(compositor,
                        pad.weak_reference(),
                        &event);
    };
]);