/**
* Handles Touch event
*
* @param event the motion event
* @return
*/
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
lastTouchedPosition = getMotionEventPosition(event);
scroller.forceFinished(true);
clearMessages();
listener.onTouch();
break;
case MotionEvent.ACTION_UP:
if (scroller.isFinished()) listener.onTouchUp();
break;
case MotionEvent.ACTION_MOVE:
// perform scrolling
int distance = (int) (getMotionEventPosition(event) - lastTouchedPosition);
if (distance != 0) {
startScrolling();
listener.onScroll(distance);
lastTouchedPosition = getMotionEventPosition(event);
}
break;
}
if (!gestureDetector.onTouchEvent(event) && event.getAction() == MotionEvent.ACTION_UP) {
justify();
}
return true;
}
public void handleMessage(Message msg) {
scroller.computeScrollOffset();
int currPosition = getCurrentScrollerPosition();
int delta = lastScrollPosition - currPosition;
lastScrollPosition = currPosition;
if (delta != 0) {
listener.onScroll(delta);
}
// scrolling is not finished when it comes to final Y
// so, finish it manually
if (Math.abs(currPosition - getFinalScrollerPosition()) < MIN_DELTA_FOR_SCROLLING) {
// currPosition = getFinalScrollerPosition();
scroller.forceFinished(true);
}
if (!scroller.isFinished()) {
animationHandler.sendEmptyMessage(msg.what);
} else if (msg.what == MESSAGE_SCROLL) {
justify();
} else {
finishScrolling();
}
}
/** Finishes scrolling */
protected void finishScrolling() {
if (isScrollingPerformed) {
listener.onFinished();
isScrollingPerformed = false;
}
}
/** Starts scrolling */
private void startScrolling() {
if (!isScrollingPerformed) {
isScrollingPerformed = true;
listener.onStarted();
}
}
/** Justifies spinnerwheel */
private void justify() {
listener.onJustify();
setNextMessage(MESSAGE_JUSTIFY);
}
