You get an OnDotChange! Everypony gets an OnDotChange!

textview.go

@@ -47,6 +47,12 @@ func (this *TextView) Dot () text.Dot {
 	return this.box.Dot()
 }
 
+// OnDotChange specifies a function to be called when the text cursor or
+// selection changes.
+func (this *TextView) OnDotChange (callback func ()) event.Cookie {
+	return this.box.OnDotChange(callback)
+}
+
 // SetAlign sets the X and Y alignment of the text view.
 func (this *TextView) SetAlign (x, y tomo.Align) {
 	this.box.SetAttr(tomo.AAlign(x, y))