Re: How to deploy JPanel in a JScrollPane?

From:

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

Newsgroups:

comp.lang.java.gui

Date:

Thu, 08 Apr 2010 21:39:38 -0400

Message-ID:

<nospam-3ED93D.21393808042010@news.aioe.org>

In article
<8c75cc0c-8c0b-4de8-9d44-50cb18c00cfe@r1g2000yqj.googlegroups.com>,
Czterysta Czwarty <czterystaczwarty@gmail.com> wrote:

Hi!
I have a component which extends JPanel and a put it in the frame in
this way:

or (String name : contacts) {
        ContactPanel cp = new ContactPanel(name);
        //contactScrollPane.add(cp);
        this.getContentPane().add(cp);
}
JFrame used FlowLayout.

When I try to put it into JScrollPane:

contactScrollPane.add (cp);

Components didn't showed. How to deploy it correctly?

Assuming "this" is a JFrame, which has a BorderLayout by default, try
adding your ContactPanels to a panel having a grid layout. Then
construct the scroll pane using the grid panel:

    JPanel panel = new JPanel(new GridLayout(0, 1));
    for (String name : contacts) {
       ContactPanel cp = new ContactPanel(name);
           panel.add(cp);
    }
    JScrollPane sp = new JScrollPane(panel);
    this.add(sp, BorderLayout.CENTER);

This should work even if you give the JFrame a FlowLayout.

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