io/key: [API] introduce FocusFilter for matching focus and editor events

Signed-off-by: Elias Naur <mail@eliasnaur.com>

widget/button.go

@@ -162,7 +162,7 @@ func (b *Clickable) Update(gtx layout.Context) []Click {
 			})
 		}
 	}
-	for _, e := range gtx.Events(&b.keyTag) {
+	for _, e := range gtx.Events(&b.keyTag, key.FocusFilter{}) {
 		switch e := e.(type) {
 		case key.FocusEvent:
 			b.focused = e.Focus

widget/editor.go

@@ -332,7 +332,7 @@ func (e *Editor) processKey(gtx layout.Context) {
 	}
 	// adjust keeps track of runes dropped because of MaxLen.
 	var adjust int
-	for _, ke := range gtx.Events(&e.eventKey, transfer.TargetFilter{Type: "application/text"}) {
+	for _, ke := range gtx.Events(&e.eventKey, transfer.TargetFilter{Type: "application/text"}, key.FocusFilter{}) {
 		e.blinkStart = gtx.Now
 		switch ke := ke.(type) {
 		case key.FocusEvent:

widget/enum.go

@@ -59,7 +59,7 @@ func (e *Enum) Update(gtx layout.Context) bool {
 				}
 			}
 		}
-		for _, ev := range gtx.Events(&state.tag) {
+		for _, ev := range gtx.Events(&state.tag, key.FocusFilter{}) {
 			switch ev := ev.(type) {
 			case key.FocusEvent:
 				if ev.Focus {

widget/selectable.go

@@ -304,7 +304,7 @@ func (e *Selectable) clickDragEvents(gtx layout.Context) []event.Event {
 }
 
 func (e *Selectable) processKey(gtx layout.Context) {
-	for _, ke := range gtx.Events(e) {
+	for _, ke := range gtx.Events(e, key.FocusFilter{}) {
 		switch ke := ke.(type) {
 		case key.FocusEvent:
 			e.focused = ke.Focus