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-rw-r--r--lib/ui/interfaces.go9
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/ui/interfaces.go b/lib/ui/interfaces.go
index d27afe2..0cdffc1 100644
--- a/lib/ui/interfaces.go
+++ b/lib/ui/interfaces.go
@@ -4,12 +4,15 @@ import (
 	"github.com/gdamore/tcell"
 )
 
+// Drawable is a UI component that can draw. Unless specified, all methods must
+// only be called from a single goroutine, the UI goroutine.
 type Drawable interface {
-	// Called when this renderable should draw itself
+	// Called when this renderable should draw itself.
 	Draw(ctx *Context)
-	// Specifies a function to call when this cell needs to be redrawn
+	// Specifies a function to call when this cell needs to be redrawn. The
+	// callback may be called in any goroutine.
 	OnInvalidate(callback func(d Drawable))
-	// Invalidates the drawable
+	// Invalidates the drawable. This can be called from any goroutine.
 	Invalidate()
 }