Re: Horizontally scrollin

From:

"Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this>

Newsgroups:

comp.lang.java.gui

Date:

Wed, 27 Apr 2011 15:32:36 GMT

Message-ID:

<1175168444.816844.44770@n76g2000hsh.googlegroups.com>

To: comp.lang.java.gui
On Mar 29, 8:46 pm, RedGrittyBrick <redgrittybr...@spamweary.foo>
wrote:

Andrew Thompson wrote:

On Mar 28, 11:27 pm, RedGrittyBrick <redgrittybr...@spamweary.foo>
wrote: ..

Thanks, that is perfect in all but one respect ... Unfortunately
the table headings no longer show.

I am beginning to think this is a bug, and have started trawling
through the bug D/B looking for similar problems.

Here is a likely looking one, though Sun
marked it 'Closed, not a bug' (shrugs). *
<http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4194022>

Thanks, I've no experience of the Java bug database

Start here..
<http://bugs.sun.com/bugdatabase/index.jsp>

If you think it may be a bug

Unfortunately, Sun doesn't. ;-)

..then I can think about stopping tearing my
hair out and worrying about what I am doing wrong.

* OTOH, using a slight variant of the advice
on that page, I came up with this (very
hackish looking) code that seems to behave
as we might expect..

<sscce>
import java.awt.*;
import javax.swing.*;
import javax.swing.table.TableColumn;

public class HorizScrollTable extends JPanel {

     HorizScrollTable() {
         setLayout(new BorderLayout());
        JTable table = new JTable(data, headings){
            Component parent;

            public boolean getScrollableTracksViewportWidth(){
                 return isThinnerThanParent();
            }

            boolean isThinnerThanParent() {
                if (parent==null) {
                    parent = getParent();
                }
                Dimension d1 = getSize();
                Dimension d2 = parent.getSize();

                return (d1.width<=d2.width);
            }
        };
         table.setAutoResizeMode(
             JTable.AUTO_RESIZE_ALL_COLUMNS);
         JScrollPane scrollPane = new JScrollPane(table);

         add(scrollPane, BorderLayout.CENTER);
     }

     String[] headings = new String[] { "Product Category", "Product",
             "Supplier", "Region", "Year", "Period", "Sales" };
     int[] widths = { 80, 100, 200, 120, 40, 80, 60 };
     Object[][] data = {
             { "Apples", "Granny Smith",
                     "The Freemantle apple collective",
                     "Northeast", 2007, "Quarter 2", 156.67 },
             { "Apples", "Granny Smith",
                     "The Freemantle apple collective",
                     "South", 2007, "Quarter 2", 1766.01 },
             { "Pears", "Concord", "John Williams and Sons",
                     "Northeast",
                     2007, "Quarter 2", 987.29 },
             { "Pears", "Conference", "Montpelier et fils",
                     "South", 2007,
                     "Quarter 2", 1221.16 } };

     private static void createAndShowGUI() {
         JFrame frame = new JFrame("Horizontally scrollable JTable");
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         JComponent newContentPane = new HorizScrollTable();
         newContentPane.setOpaque(true);
         frame.setContentPane(newContentPane);
         frame.pack();
         frame.setSize(300,300);
         frame.setVisible(true);
     }

     public static void main(String[] args) {
         javax.swing.SwingUtilities.invokeLater(new Runnable() {
             public void run() {
                 createAndShowGUI();
             }
         });
     }
}
</sscce>

Does that work for you?

Andrew T.

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