int length = getAnimationLength();
int half = length/2;
// create a blind
Rectangle blind = new Rectangle();
// calculate the fade out part
if(step >= 0 && step < half) {
// draw the saved version of the old tab component
if(prev != null) {
g2.drawImage(prev,(int)size.getX(),(int)size.getY(),null);
}
// calculate the growing blind
blind = new Rectangle(
(int)size.getX(),
(int)size.getY(),
step,
(int)size.getHeight());
}
// calculate the fade in part
if(step >= half && step < length) {
// calculate the shrinking blind
blind = new Rectangle(
(int)size.getX(),
(int)size.getY(),
length-step,
(int)size.getHeight());
blind.translate(step-half,0);
}
// draw the blinds
for(int i=0; i<size.getWidth()/half; i++) {
g2.setColor(Color.white);
g2.fill(blind);
blind.translate(half,0);
}
