private void calculateTotal()
{
int unused = getUnused();
if (lastUnused == unused)
{
return;
}
lastUnused = unused;
if (unused > 1)
{
if (counter == null || !counter.IsActive())
{
createCounter();
}
((UnityEngine.UI.Button)counter).image.sprite = getNumberIcon(unused);
}
else
{
UnityEngine.Object.Destroy(icon);
}
Image image = GetComponent <Image>();
Color c = image.color;
c.a = unused == 0? .5f : 1;
image.color = c;
}