public void onScroll(int distance) { // 杞瓙杞姩杩囩▼涓�
doScroll(distance);
int height = getHeight();
if (scrollingOffset > height) {
scrollingOffset = height;
scroller.stopScrolling();
} else if (scrollingOffset < -height) {
scrollingOffset = -height;
scroller.stopScrolling();
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (!isEnabled() || getViewAdapter() == null) {
return true;
}
switch (event.getAction()) {
case MotionEvent.ACTION_MOVE:
if (getParent() != null) {
getParent().requestDisallowInterceptTouchEvent(true);
}
break;
case MotionEvent.ACTION_UP:
if (!isScrollingPerformed) {
int distance = (int) event.getY() - getHeight() / 2;
if (distance > 0) {
distance += getItemHeight() / 2;
} else {
distance -= getItemHeight() / 2;
}
int items = distance / getItemHeight();
if (items != 0 && isValidItemIndex(currentItem + items)) {
notifyClickListenersAboutClick(currentItem + items);
}
}
break;
}
return scroller.onTouchEvent(event);
}
/** Stops scrolling */
public void stopScrolling() {
scroller.stopScrolling();
}
/**
* Scroll the wheel
*
* @param itemsToSkip items to scroll
* @param time scrolling duration
*/
public void scroll(int itemsToScroll, int time) {
int distance = itemsToScroll * getItemHeight() - scrollingOffset;
scroller.scroll(distance, time);
}
/**
* Set the the specified scrolling interpolator
*
* @param interpolator the interpolator
*/
public void setInterpolator(Interpolator interpolator) {
scroller.setInterpolator(interpolator);
}
public void onJustify() {
if (Math.abs(scrollingOffset) > WheelScroller.MIN_DELTA_FOR_SCROLLING) {
scroller.scroll(scrollingOffset, 0);
}
}
/**
* Scroll the spinnerwheel
*
* @param itemsToScroll items to scroll
* @param time scrolling duration
*/
public void scroll(int itemsToScroll, int time) {
int distance = itemsToScroll * getItemDimension() - mScrollingOffset;
onScrollTouched(); // we have to emulate touch when scrolling spinnerwheel programmatically to
// light up stuff
mScroller.scroll(distance, time);
}