some refinement

common/elements/v1/stacks/options.go

@@ -1,12 +1,16 @@
 package stacks
 
-import "git.vezzani.net/ben/games/common/elements/v1"
+import (
+	"git.vezzani.net/ben/games/common/elements/v1/core"
+)
 
 type OptFunc func(*Stack)
 
-func Core(f elements.OptFunc) OptFunc {
+func Core(fs ...core.OptFunc) OptFunc {
 	return func(s *Stack) {
-		f(&s.Core)
+		for _, f := range fs {
+			f(&s.Element)
+		}
 	}
 }
 

common/elements/v1/stacks/stack.go

@@ -1,13 +1,13 @@
 package stacks
 
 import (
-	"git.vezzani.net/ben/games/common/elements/v1"
+	"git.vezzani.net/ben/games/common/elements/v1/core"
 	"git.vezzani.net/ben/games/common/elements/v1/mouse"
 
 	"github.com/hajimehoshi/ebiten/v2"
 )
 
-func New(ops ...OptFunc) elements.Element {
+func New(ops ...OptFunc) *Stack {
 	s := Stack{}
 	for op := range ops {
 		ops[op](&s)
@@ -29,7 +29,7 @@ func New(ops ...OptFunc) elements.Element {
 }
 
 type Stack struct {
-	elements.Core
+	core.Element
 	mouse.NopHandler
 	horizontal bool
 }