public void act(float delta) {
super.act(delta);
boolean panning = flickScrollListener.getGestureDetector().isPanning();
if (fadeAlpha > 0 && fadeScrollBars && !panning && !touchScrollH && !touchScrollV) {
fadeDelay -= delta;
if (fadeDelay <= 0) fadeAlpha = Math.max(0, fadeAlpha - delta);
}
if (flingTimer > 0) {
resetFade();
float alpha = flingTimer / flingTime;
amountX -= velocityX * alpha * delta;
amountY -= velocityY * alpha * delta;
clamp();
// Stop fling if hit overscroll distance.
if (amountX == -overscrollDistance) velocityX = 0;
if (amountX >= maxX + overscrollDistance) velocityX = 0;
if (amountY == -overscrollDistance) velocityY = 0;
if (amountY >= maxY + overscrollDistance) velocityY = 0;
flingTimer -= delta;
if (flingTimer <= 0) {
velocityX = 0;
velocityY = 0;
}
}
if (smoothScrolling && flingTimer <= 0 && !touchScrollH && !touchScrollV && !panning) {
if (visualAmountX != amountX) {
if (visualAmountX < amountX)
visualScrollX(
Math.min(
amountX,
visualAmountX + Math.max(150 * delta, (amountX - visualAmountX) * 5 * delta)));
else
visualScrollX(
Math.max(
amountX,
visualAmountX - Math.max(150 * delta, (visualAmountX - amountX) * 5 * delta)));
}
if (visualAmountY != amountY) {
if (visualAmountY < amountY)
visualScrollY(
Math.min(
amountY,
visualAmountY + Math.max(150 * delta, (amountY - visualAmountY) * 5 * delta)));
else
visualScrollY(
Math.max(
amountY,
visualAmountY - Math.max(150 * delta, (visualAmountY - amountY) * 5 * delta)));
}
} else {
if (visualAmountX != amountX) visualScrollX(amountX);
if (visualAmountY != amountY) visualScrollY(amountY);
}
if (!panning) {
if (overscrollX && scrollX) {
if (amountX < 0) {
resetFade();
amountX +=
(overscrollSpeedMin
+ (overscrollSpeedMax - overscrollSpeedMin) * -amountX / overscrollDistance)
* delta;
if (amountX > 0) scrollX(0);
} else if (amountX > maxX) {
resetFade();
amountX -=
(overscrollSpeedMin
+ (overscrollSpeedMax - overscrollSpeedMin)
* -(maxX - amountX)
/ overscrollDistance)
* delta;
if (amountX < maxX) scrollX(maxX);
}
}
if (overscrollY && scrollY) {
if (amountY < 0) {
resetFade();
amountY +=
(overscrollSpeedMin
+ (overscrollSpeedMax - overscrollSpeedMin) * -amountY / overscrollDistance)
* delta;
if (amountY > 0) scrollY(0);
} else if (amountY > maxY) {
resetFade();
amountY -=
(overscrollSpeedMin
+ (overscrollSpeedMax - overscrollSpeedMin)
* -(maxY - amountY)
/ overscrollDistance)
* delta;
if (amountY < maxY) scrollY(maxY);
}
}
}
}
