HandleKeyUp causes a... key up event. As it should.

internal/system/box.go

@@ -191,7 +191,7 @@ func (this *box) SetDNDAccept (types ...data.Mime) {
 }
 
 func (this *box) SetFocused (focused bool) {
-	hierarchy := this.parent.getHierarchy()
+	hierarchy := this.getHierarchy()
 	if hierarchy == nil {
 		focusedCopy := focused
 		this.focusQueued = &focusedCopy
@@ -217,7 +217,7 @@ func (this *box) SetFocusable (focusable bool) {
 func (this *box) Focused () bool {
 	hierarchy := this.getHierarchy()
 	if hierarchy == nil { return false }
-	return hierarchy.isFocused(this)
+	return hierarchy.isFocused(this.outer)
 }
 
 func (this *box) Modifiers () input.Modifiers {

internal/system/event.go

@@ -36,7 +36,7 @@ func (this *Hierarchy) HandleKeyDown (key input.Key, numberPad bool) {
 // be called *before* HandleKeyUp.
 func (this *Hierarchy) HandleKeyUp (key input.Key, numberPad bool) {
 	if target := this.keyboardTarget(); target != nil {
-		target.handleKeyDown(key, numberPad)
+		target.handleKeyUp(key, numberPad)
 	}
 }