@Override
        public void actionPerformed(ActionEvent event) {
            if (event.getSource()== m_generateBarButton){                         
                generateBarChart();                  
            } else if (event.getSource()== m_generatePieButton){           			
                generatePieChart();
            } else if (event.getSource() == m_generateLineButton) {
				generateLineChart();
			} else if (event.getSource() == m_generateRingButton) {
				generateRingChart();
			} else if (event.getSource() == m_generateAreaButton) {
				generateAreaChart();
			} else if (event.getSource() == m_generateBubbleButton) {
				generateBubbleChart();
			} else if (event.getSource() == m_generateScatterButton) {
				generateScatterChart();
			}
        }