@Override
        public void run() {
            // The data has changed since we posted this action to the event
            // queue, bail out before bad things happen.
            if (mDataChanged)
                return;

            if (mAdapter != null && mAdapter.getCount() > 0
                    && mClickMotionPosition != INVALID_POSITION
                    && mClickMotionPosition < mAdapter.getCount() && sameWindow()) {
                final View view = getHeaderAt(mClickMotionPosition);
                // If there is no view then something bad happened, the view
                // probably scrolled off the screen, and we should cancel the
                // click.
                if (view != null) {
                    performHeaderClick(view, headerViewPositionToId(mClickMotionPosition));
                }
            }
        }
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