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add a UX delay to help ensure redraw order when switching apps

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This commit is contained in:
bunnie 2022-03-28 15:25:08 +08:00
parent 64ad28cb18
commit 1130bda4a8
1 changed files with 10 additions and 3 deletions
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13
services/gam/src/contexts.rs
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@ -94,6 +94,7 @@ pub(crate) struct ContextManager {
main_menu_app_token: Option<[u32; 4]>, // app_token of the main menu, if it has been registered
/// for internal generation of deface states
pub trng: trng::Trng,
tt: ticktimer_server::Ticktimer,
}
impl ContextManager {
pub fn new(xns: &xous_names::XousNames) -> Self {
@ -114,6 +115,7 @@ impl ContextManager {
kbd,
main_menu_app_token: None,
trng: trng::Trng::new(&xns).expect("couldn't connect to trng"),
tt: ticktimer_server::Ticktimer::new().unwrap(),
}
}
pub(crate) fn claim_token(&mut self, name: &str) -> Option<[u32; 4]> {
@ -465,10 +467,15 @@ impl ContextManager {
pub(crate) fn redraw(&self) -> Result<(), xous::Error> { // redraws the currently focused context
if let Some(token) = self.focused_app() {
if let Some(context) = self.contexts.get(&token) {
log::trace!("redraw msg to {}, id {}", context.listener, context.redraw_id);
return xous::send_message(context.listener,
log::info!("redraw msg to {}, id {}", context.listener, context.redraw_id);
let ret = xous::send_message(context.listener,
xous::Message::new_scalar(context.redraw_id as usize, 0, 0, 0, 0)
).map(|_| ())
).map(|_| ());
// this delay helps ensure that the previously requested UX redraw has time to complete
// in particular, this helps sequence the case where one modal is erased, and the next one is
// raised, in quick succession.
self.tt.sleep_ms(20).unwrap();
return ret
}
} else {
return Err(xous::Error::UseBeforeInit)