How to make the knob of a horizontal Scroll Bar stay at right

Question

Hi I need some advise to achieve this:
I have a chart continuously deploying towards the right side (think on an electro cardiogram that is continuously feeding data). All the chart information is kept available inside a JScrollPane. What I want to achieve is:
1. if the horizontal scroll bar knob is at the right end of the scroll bar make the end part of the chart be displayed continuously (view is scrolling to the right, the knob stays at the right end)
2. if the user moves the knob left from the right end freeze the motion and just show the selected portion (meanwhile data keeps being fed and stored but not displayed)
3. when the user decides to drag the knob again to the right end the behavior of point # 1 resumes.
The basic swing structure I'm using for this is the following:
public class Electro extends JPanel {
public Electro() {
JFrame f = new JFrame();
JScrollPane sp = new JScrollPane(this);
f.getContentPane().add(sp);
     f.pack();
     f.setVisible(true);
I would highly appreciate any feedback from fellow members. Thank you.

Answer 1

hi friend
try this in ur code
public class Electro extends JPanel {
public Electro() {
JFrame f = new JFrame();
JScrollPane sp = new JScrollPane(this);
sp.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
sp.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
f.getContentPane().add(sp);
f.pack();
f.setVisible(true);
i think it will be help full to you
thanks
waiting for reply