Re: [jCrollPane]Positionning the view with a command

From:

"John B. Matthews" <nospam@nospam.invalid>

Newsgroups:

comp.lang.java.help

Date:

Sat, 18 Jul 2009 19:25:58 -0400

Message-ID:

<nospam-D08787.19255818072009@news.aioe.org>

In article <4a61fc3e$0$5402$b9f67a60@news.newsdemon.com>,
Knute Johnson <nospam@rabbitbrush.frazmtn.com> wrote:

Daniel Moyne wrote:

[...]

Now how do I recover information on the vertical slider to set its position
with my selected int variable ?

Knute: Your approach is very appealing. As an alternative, I replaced
your JTextField with a JSpinner:

        JSpinner js= new JSpinner();
        js.setModel(new SpinnerNumberModel(0, 0, 9, 1));
        js.addChangeListener(new ChangeListener() {
            //@Override
            public void stateChanged(ChangeEvent e) {
                JSpinner s = (JSpinner) e.getSource();
                int n = (Integer) s.getValue();
                JViewport vp = sp.getViewport();
                Point p = panels[n].getLocation();
                vp.setViewPosition(p);
            }
        });
        add(js, BorderLayout.SOUTH);

[...]

I also centered n vertically, in NPanel by adding half the font height:

        int h = fm.getHeight() / 2;
        g.drawString(nStr,(getWidth()-w)/2,(getHeight()+h)/2);

--
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>