Re: reference JScrollPane

From:

"Thomas Fritsch" <thomas.fritsch@THRWHITE.remove-dii-this>

Newsgroups:

comp.lang.java.gui

Date:

Wed, 27 Apr 2011 15:29:17 GMT

Message-ID:

<eorhoq$jcb$01$1@news.t-online.com>

To: comp.lang.java.gui
"Jeff Higgins" <oohiggins@yahoo.com> wrote:

Hi,
How can I reference JScrollPane's
ViewportView from the contents of the
same JScrollPane's RowHeaderView?

I've tried:
private Insets getViewportViewInsets() {
return getParent().viewport.getInsets();
}

Thanks,
Jeff Higgins

import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;

public class TestRuler extends JFrame {

TestRuler() {
   Ruler vRule = new Ruler();
   MousePad mp = new MousePad();
   JScrollPane sPane = new JScrollPane();
   sPane.setViewportView(mp);
   sPane.setRowHeaderView(vRule);
   sPane.setViewportBorder(new LineBorder(Color.black));
   getContentPane().add(sPane);
}

class MousePad extends JPanel {}

class Ruler extends JPanel {

   Insets viewportViewInsets;

   private Insets getViewportViewInsets() {
     // How do get ViewportView's
     // insets from here?
     return null;

May be something like this (untested code):
      JScrollPane scrollPane = (JScrollPane)
         SwingUtilities.getAncestorOfClass(JScrollPane.class, this);
      return scrollPane.getViewport().getInsets();

   }
}

public static void main(String[] args) {
   JFrame frame = new TestLinePosition();
   frame.pack();
   frame.setBounds(100, 100, 200, 200);
   frame.setVisible(true);
}
}

--
Thomas

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