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