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impl touch events for emscripten (#358)

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thiolliere 2017-12-01 15:00:09 +02:00 • committed by tomaka
parent 8348e8225b
commit d2dd82c146
3 changed files with 110 additions and 0 deletions
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42
src/platform/emscripten/mod.rs
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@ -274,6 +274,40 @@ extern "C" fn keyboard_callback(
ffi::EM_FALSE
}
extern fn touch_callback(
event_type: c_int,
event: *const ffi::EmscriptenTouchEvent,
event_queue: *mut c_void) -> ffi::EM_BOOL
{
unsafe {
let queue: &RefCell<VecDeque<::Event>> = mem::transmute(event_queue);
let phase = match event_type {
ffi::EMSCRIPTEN_EVENT_TOUCHSTART => ::TouchPhase::Started,
ffi::EMSCRIPTEN_EVENT_TOUCHEND => ::TouchPhase::Ended,
ffi::EMSCRIPTEN_EVENT_TOUCHMOVE => ::TouchPhase::Moved,
ffi::EMSCRIPTEN_EVENT_TOUCHCANCEL => ::TouchPhase::Cancelled,
_ => return ffi::EM_FALSE,
};
for touch in 0..(*event).numTouches as usize {
let touch = (*event).touches[touch];
if touch.isChanged == ffi::EM_TRUE {
queue.borrow_mut().push_back(::Event::WindowEvent {
window_id: ::WindowId(WindowId(0)),
event: ::WindowEvent::Touch(::Touch {
device_id: ::DeviceId(DeviceId),
phase,
id: touch.identifier as u64,
location: (touch.canvasX as f64, touch.canvasY as f64),
}),
});
}
}
}
ffi::EM_FALSE
}
// In case of fullscreen window this method will request fullscreen on change
#[allow(non_snake_case)]
unsafe extern "C" fn fullscreen_callback(
@ -335,6 +369,14 @@ impl Window {
.map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
em_try(ffi::emscripten_set_keyup_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(keyboard_callback)))
.map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
em_try(ffi::emscripten_set_touchstart_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(touch_callback)))
.map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
em_try(ffi::emscripten_set_touchend_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(touch_callback)))
.map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
em_try(ffi::emscripten_set_touchmove_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(touch_callback)))
.map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
em_try(ffi::emscripten_set_touchcancel_callback(DOCUMENT_NAME.as_ptr() as *const c_char, mem::transmute(&*window.window.events), ffi::EM_FALSE, Some(touch_callback)))
.map_err(|e| ::CreationError::OsError(format!("emscripten error: {}", e)))?;
}
if attribs.fullscreen.is_some() {