/**
* 描述：TODO
*
* @see java.lang.Runnable#run()
* @author: zhaoqp
* @date：2013-11-28 上午11:14:35
* @version v1.0
*/
public void run() {
if (CarouselView.this.getChildCount() == 0) {
endFling(true);
return;
}
mShouldStopFling = false;
final Rotator rotator;
final float angle;
boolean more;
synchronized (this) {
rotator = mRotator;
more = rotator.computeAngleOffset();
angle = rotator.getCurrAngle();
}
// Flip sign to convert finger direction to list items direction
// (e.g. finger moving down means list is moving towards the top)
float delta = mLastFlingAngle - angle;
//////// Shoud be reworked
trackMotionScroll(delta);
if (more && !mShouldStopFling) {
mLastFlingAngle = angle;
post(this);
} else {
mLastFlingAngle = 0.0f;
endFling(true);
}
}
/**
* Start using distance.
*
* @param deltaAngle the delta angle
*/
public void startUsingDistance(float deltaAngle) {
if (deltaAngle == 0) return;
startCommon();
mLastFlingAngle = 0;
synchronized (this) {
mRotator.startRotate(0.0f, -deltaAngle, mAnimationDuration);
}
post(this);
}
/**
* End fling.
*
* @param scrollIntoSlots the scroll into slots
*/
private void endFling(boolean scrollIntoSlots) {
/*
* Force the scroller's status to finished (without setting its
* position to the end)
*/
synchronized (this) {
mRotator.forceFinished(true);
}
if (scrollIntoSlots) scrollIntoSlots();
}
/**
* Start using velocity.
*
* @param initialVelocity the initial velocity
*/
public void startUsingVelocity(float initialVelocity) {
if (initialVelocity == 0) return;
startCommon();
mLastFlingAngle = 0.0f;
mRotator.fling(initialVelocity);
post(this);
}