Implement hypertext (badly)

internal/ui/static_element.go

@@ -0,0 +1,15 @@
+package ui
+
+import (
+	"image"
+
+	"github.com/hajimehoshi/ebiten"
+)
+
+// A static element is not a widget; it merely displays some pixels and may
+// optionally have a tooltip for display within bounds
+type staticElement struct {
+	bounds  image.Rectangle
+	image   *ebiten.Image
+	tooltip string
+}