QGraphicsPixmapItem - modifying the alpha channel of a QPixmap

[Claymore]

BTW. Your method for updating alpha is very slow. How about this?

QPixmap &setAlpha(QPixmap &px, int val)
{
  QPixmap alpha = px;  
  QPainter p(&alpha);
  p.fillRect(alpha.rect(), QColor(val, val, val));
  p.end();
  px.setAlphaChannel(alpha);
  return px;
}

QPixmap &setAlpha(QPixmap &px, int val)
{
  QPixmap alpha = px;  
  QPainter p(&alpha);
  p.fillRect(alpha.rect(), QColor(val, val, val));
  p.end();
  px.setAlphaChannel(alpha);
  return px;
}

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That method worked beautifully! I didn't even think of using QPainter to handle the painting... *bonks self* Thanks a bunch!