TextInput scrolls in the proper direction

scrollbar.go

@@ -229,6 +229,7 @@ func (this *Scrollbar) handleButtonUp (button input.Button) bool {
 
 func (this *Scrollbar) handleMouseMove () bool {
 	if !this.dragging { return false }
+	this.drag()
 	return true
 }
 

textinput.go

@@ -120,6 +120,6 @@ func (this *TextInput) handleKeyUp (key input.Key, numpad bool) bool {
 }
 
 func (this *TextInput) handleScroll (x, y float64) bool {
-	this.ScrollTo(this.ContentBounds().Min.Add(image.Pt(int(x), int(y))))
+	this.ScrollTo(this.ContentBounds().Min.Sub(image.Pt(int(x), int(y))))
 	return true
 }