public void setOnValueTouchListener(BubbleChartOnValueSelectListener touchListener) {
        if (null != touchListener) {
            this.onValueTouchListener = touchListener;
        }
    }
BubbleChart, supports circle bubbles and square bubbles.

@author lecho
hellocharts-library/src/lecho/lib/hellocharts/view/BubbleChartView.java