diff --git a/icon.go b/icon.go
index 1500c6f..c3a2a70 100644
--- a/icon.go
+++ b/icon.go
@@ -3,9 +3,11 @@ package objects
 import "git.tebibyte.media/tomo/tomo"
 import "git.tebibyte.media/tomo/tomo/canvas"
 
+var _ tomo.Object = new(Icon)
+
 // Icon displays a single icon.
 type Icon struct {
-	tomo.Box
+	box  tomo.Box
 	icon tomo.Icon
 	size tomo.IconSize
 }
@@ -21,14 +23,19 @@ func iconSizeString (size tomo.IconSize) string {
 // NewIcon creates a new icon from an icon ID.
 func NewIcon (icon tomo.Icon, size tomo.IconSize) *Icon {
 	this := &Icon {
-		Box: tomo.NewBox(),
+		box: tomo.NewBox(),
 	}
-	this.SetRole(tomo.R("objects", "Icon"))
+	this.box.SetRole(tomo.R("objects", "Icon"))
 	this.SetIcon(icon, size)
-	this.OnIconSetChange(this.handleIconSetChange)
+	this.box.OnIconSetChange(this.handleIconSetChange)
 	return this
 }
 
+// GetBox returns the underlying box.
+func (this *Icon) GetBox () tomo.Box {
+	return this.box
+}
+
 // SetIcon sets the icon.
 func (this *Icon) SetIcon (icon tomo.Icon, size tomo.IconSize) {
 	if this.icon == icon { return }
@@ -42,12 +49,12 @@ func (this *Icon) handleIconSetChange () {
 }
 
 func (this *Icon) setTexture (texture canvas.Texture) {
-	this.SetAttr(tomo.ATexture(texture))
-	this.SetAttr(tomo.ATextureMode(tomo.TextureModeCenter))
+	this.box.SetAttr(tomo.ATexture(texture))
+	this.box.SetAttr(tomo.ATextureMode(tomo.TextureModeCenter))
 	if texture == nil {
-		this.SetAttr(tomo.AMinimumSize(0, 0))
+		this.box.SetAttr(tomo.AMinimumSize(0, 0))
 	} else {
 		bounds := texture.Bounds()
-		this.SetAttr(tomo.AttrMinimumSize(bounds.Max.Sub(bounds.Min)))
+		this.box.SetAttr(tomo.AttrMinimumSize(bounds.Max.Sub(bounds.Min)))
 	}
 }