@Override
    public void callTouchListener() {
        SelectedValue selectedValue = chartRenderer.getSelectedValue();

        if (selectedValue.isSet()) {
            PointValue point = data.getLines().get(selectedValue.getFirstIndex()).getValues()
                    .get(selectedValue.getSecondIndex());
            onValueTouchListener.onValueSelected(selectedValue.getFirstIndex(), selectedValue.getSecondIndex(), point);
        } else {
            onValueTouchListener.onValueDeselected();
        }
    }
LineChart, supports cubic lines, filled lines, circle and square points. Point radius and stroke width can be
adjusted using LineChartData attributes.

@author Leszek Wach
hellocharts-library/src/lecho/lib/hellocharts/view/LineChartView.java