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use std::sync::{Arc, Mutex};
use crate::dpi::LogicalPosition;
use crate::event::{TouchPhase, WindowEvent};
use super::{event_loop::EventsSink, make_wid, window::WindowStore, DeviceId};
use smithay_client_toolkit::surface;
use smithay_client_toolkit::reexports::client::protocol::{
wl_seat,
wl_surface::WlSurface,
wl_touch::{Event as TouchEvent, WlTouch},
};
// location is in logical coordinates.
struct TouchPoint {
surface: WlSurface,
position: LogicalPosition<f64>,
id: i32,
}
pub(crate) fn implement_touch(
seat: &wl_seat::WlSeat,
sink: EventsSink,
store: Arc<Mutex<WindowStore>>,
) -> WlTouch {
let mut pending_ids = Vec::new();
seat.get_touch(|touch| {
touch.implement_closure(
move |evt, _| {
let store = store.lock().unwrap();
match evt {
TouchEvent::Down {
surface, id, x, y, ..
} => {
let wid = store.find_wid(&surface);
if let Some(wid) = wid {
let scale_factor = surface::get_dpi_factor(&surface) as f64;
let position = LogicalPosition::new(x, y);
sink.send_window_event(
WindowEvent::Touch(crate::event::Touch {
device_id: crate::event::DeviceId(
crate::platform_impl::DeviceId::Wayland(DeviceId),
),
phase: TouchPhase::Started,
location: position.to_physical(scale_factor),
force: None, // TODO
id: id as u64,
}),
wid,
);
pending_ids.push(TouchPoint {
surface,
position,
id,
});
}
}
TouchEvent::Up { id, .. } => {
let idx = pending_ids.iter().position(|p| p.id == id);
if let Some(idx) = idx {
let pt = pending_ids.remove(idx);
let scale_factor = surface::get_dpi_factor(&pt.surface) as f64;
let location = pt.position.to_physical(scale_factor);
sink.send_window_event(
WindowEvent::Touch(crate::event::Touch {
device_id: crate::event::DeviceId(
crate::platform_impl::DeviceId::Wayland(DeviceId),
),
phase: TouchPhase::Ended,
location,
force: None, // TODO
id: id as u64,
}),
make_wid(&pt.surface),
);
}
}
TouchEvent::Motion { id, x, y, .. } => {
let pt = pending_ids.iter_mut().find(|p| p.id == id);
if let Some(pt) = pt {
pt.position = LogicalPosition::new(x, y);
let scale_factor = surface::get_dpi_factor(&pt.surface) as f64;
let location = pt.position.to_physical(scale_factor);
sink.send_window_event(
WindowEvent::Touch(crate::event::Touch {
device_id: crate::event::DeviceId(
crate::platform_impl::DeviceId::Wayland(DeviceId),
),
phase: TouchPhase::Moved,
location,
force: None, // TODO
id: id as u64,
}),
make_wid(&pt.surface),
);
}
}
TouchEvent::Frame => (),
TouchEvent::Cancel => {
for pt in pending_ids.drain(..) {
let scale_factor = surface::get_dpi_factor(&pt.surface) as f64;
let location = pt.position.to_physical(scale_factor);
sink.send_window_event(
WindowEvent::Touch(crate::event::Touch {
device_id: crate::event::DeviceId(
crate::platform_impl::DeviceId::Wayland(DeviceId),
),
phase: TouchPhase::Cancelled,
location,
force: None, // TODO
id: pt.id as u64,
}),
make_wid(&pt.surface),
);
}
}
_ => unreachable!(),
}
},
(),
)
})
.unwrap()
}