@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
if (!mDrawer.isUsingDragHelper() && mDrawer.isValidScroll(distanceY, distanceX)) {
final int offset = mDrawer.getHeaderTop(), min = mDrawer.getHeaderTopMinimum();
if (!mDrawer.canScrollCallback(-1)) {
if (distanceY < 0) {
if (!mDrawer.isScrollingHeaderByHelper()) {
mDrawer.offsetHeaderBy(Math.round(-distanceY));
}
mDrawer.setScrollingHeaderByGesture(true);
} else if (distanceY > 0 && offset > min) {
// Scrolling up when scrolling to list top, so we cancel touch event and scrolling
// header up
mDrawer.cancelTouchCallback();
if (!mDrawer.isScrollingHeaderByHelper()) {
mDrawer.offsetHeaderBy(Math.round(-distanceY));
}
} else if (offset <= min) {
mDrawer.scrollByCallback(-distanceX);
}
}
}
return true;
}
