@Override
        public void run() {
            final View child = getHeaderAt(mMotionHeaderPosition);
            if (child != null) {
                final long longPressId = headerViewPositionToId(mMotionHeaderPosition);

                boolean handled = false;
                if (sameWindow() && !mDataChanged) {
                    handled = performHeaderLongPress(child, longPressId);
                }
                if (handled) {
                    mTouchMode = TOUCH_MODE_FINISHED_LONG_PRESS;
                    setPressed(false);
                    child.setPressed(false);
                } else {
                    mTouchMode = TOUCH_MODE_DONE_WAITING;
                }
            }
        }
If set to true, headers will ignore horizontal padding.

@param b if true, horizontal padding is ignored by headers
Library/src/com/tonicartos/widget/stickygridheaders/StickyGridHeadersGridView.java