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Fix hovering the mouse over the active window creating an endless stream of CursorMoved events (#1170)

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* Fix hovering the mouse over the active window creating an endless stream of CursorMoved events

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Osspial 2019-09-17 11:34:48 -04:00 • committed by GitHub
parent 95581ab92f
commit d35ee0d580
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3 changed files with 43 additions and 4 deletions
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23
src/platform_impl/windows/window_state.rs
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@ -307,10 +307,25 @@ impl CursorFlags {
let client_rect = util::get_client_rect(window)?;
if util::is_focused(window) {
if self.contains(CursorFlags::GRABBED) {
util::set_cursor_clip(Some(client_rect))?;
} else {
util::set_cursor_clip(None)?;
let cursor_clip = match self.contains(CursorFlags::GRABBED) {
true => Some(client_rect),
false => None,
};
let rect_to_tuple = |rect: RECT| (rect.left, rect.top, rect.right, rect.bottom);
let active_cursor_clip = rect_to_tuple(util::get_cursor_clip()?);
let desktop_rect = rect_to_tuple(util::get_desktop_rect());
let active_cursor_clip = match desktop_rect == active_cursor_clip {
true => None,
false => Some(active_cursor_clip),
};
// We do this check because calling `set_cursor_clip` incessantly will flood the event
// loop with `WM_MOUSEMOVE` events, and `refresh_os_cursor` is called by `set_cursor_flags`
// which at times gets called once every iteration of the eventloop.
if active_cursor_clip != cursor_clip.map(rect_to_tuple) {
util::set_cursor_clip(cursor_clip)?;
}
}