private void showCategoryHints(boolean b) {
        String cat = CategoryHint.getCategory(tCategories);
        if(!prevCategory.equals(cat)) {
            if(ch==null) {
                ch = new CategoryHint(mCatHint, tCategories);
                ch.start();
            } else if(ch!=null && ch.isEnd()) {
                ch.stop = true;
                ch = new CategoryHint(mCatHint, tCategories);
                ch.start();
            } else {
                ch.restart();
            }
            prevCategory = cat;
        } else {
            if(b) {
                mCatHint.show(tCategories, 0, tCategories.getHeight());
                tCategories.requestFocus();
            }
        }
    }