add clarifying comment on FocusGained/FocusLost regarding locking

fyne-io · Sep 22, 2020 · 0b06e76 · 0b06e76
1 parent b69f249
commit 0b06e76
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/canvasobject.go b/canvasobject.go
@@ -66,6 +66,9 @@ type Draggable interface {
 // It will receive the FocusGained and FocusLost events appropriately.
 // When focused it will also have TypedRune called as text is input and
 // TypedKey called when other keys are pressed.
+//
+// Note: You must not change canvas state (including overlays or focus) in FocusGained or FocusLost
+// or you would end up with a dead-lock.
 type Focusable interface {
 	FocusGained()
 	FocusLost()