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|
package ui
import (
"sync/atomic"
)
type Invalidatable struct {
onInvalidate atomic.Value
}
func (i *Invalidatable) OnInvalidate(f func(d Drawable)) {
i.onInvalidate.Store(f)
}
func (i *Invalidatable) DoInvalidate(d Drawable) {
v := i.onInvalidate.Load()
if v == nil {
return
}
f := v.(func(d Drawable))
if f != nil {
f(d)
}
}
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