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Handle WM_POINTER* events in favor of WM_TOUCH

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Fixes #975.
This commit is contained in:
Kalmar Robert 2019-06-27 11:34:38 +02:00 committed by Kalmár Róbert
parent c1f314ccdc
commit 93c36ccf78
1 changed files with 58 additions and 0 deletions
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58
src/platform_impl/windows/event_loop.rs
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@ -1457,6 +1457,64 @@ unsafe extern "system" fn public_window_callback<T>(
0
}
winuser::WM_POINTERDOWN | winuser::WM_POINTERUPDATE | winuser::WM_POINTERUP => {
let pointer_id = LOWORD(wparam as DWORD) as UINT;
let mut entries_count = 0 as UINT;
let mut pointers_count = 0 as UINT;
if winuser::GetPointerFrameInfoHistory(
pointer_id,
&mut entries_count as *mut _,
&mut pointers_count as *mut _,
std::ptr::null_mut(),
) == 0
{
return 0;
}
let pointer_info_count = (entries_count * pointers_count) as usize;
let mut pointer_infos = Vec::with_capacity(pointer_info_count);
pointer_infos.set_len(pointer_info_count);
if winuser::GetPointerFrameInfoHistory(
pointer_id,
&mut entries_count as *mut _,
&mut pointers_count as *mut _,
pointer_infos.as_mut_ptr(),
) == 0
{
return 0;
}
let dpi_factor = hwnd_scale_factor(window);
// https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-getpointerframeinfohistory
// The information retrieved appears in reverse chronological order, with the most recent entry in the first
// row of the returned array
for pointer_info in pointer_infos.iter().rev() {
let x = pointer_info.ptPixelLocation.x as f64;
let y = pointer_info.ptPixelLocation.y as f64;
let location = LogicalPosition::from_physical((x, y), dpi_factor);
subclass_input.send_event(Event::WindowEvent {
window_id: RootWindowId(WindowId(window)),
event: WindowEvent::Touch(Touch {
phase: if pointer_info.pointerFlags & winuser::POINTER_FLAG_DOWN != 0 {
TouchPhase::Started
} else if pointer_info.pointerFlags & winuser::POINTER_FLAG_UP != 0 {
TouchPhase::Ended
} else if pointer_info.pointerFlags & winuser::POINTER_FLAG_UPDATE != 0 {
TouchPhase::Moved
} else {
continue;
},
location,
id: pointer_info.pointerId as u64,
device_id: DEVICE_ID,
}),
});
}
winuser::SkipPointerFrameMessages(pointer_id);
0
}
winuser::WM_SETFOCUS => {
use crate::event::WindowEvent::Focused;
subclass_input.send_event(Event::WindowEvent {