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ui: Better way to avoid blocking

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Fixes #625
This commit is contained in:
Hajime Hoshi 2018-06-09 13:36:35 +09:00
parent 6e12f287b0
commit be665a3526
1 changed files with 6 additions and 5 deletions
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5
internal/ui/ui_js.go
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@ -208,16 +208,17 @@ func (u *userInterface) loop(g GraphicsContext) error {
var cf js.Callback var cf js.Callback
f = func([]js.Value) { f = func([]js.Value) {
if err := u.update(g); err != nil { if err := u.update(g); err != nil {
go func() {
ch <- err ch <- err
close(ch) close(ch)
}()
return return
} }
js.Global.Get("window").Call("requestAnimationFrame", cf) js.Global.Get("window").Call("requestAnimationFrame", cf)
} }
cf = js.NewCallback(f) cf = js.NewCallback(f)
// Call f asyncly to be async since ch is used in f.
go func() {
f(nil) f(nil)
}()
return <-ch return <-ch
} }