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Simple fix for JTable view?

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  Simple fix for JTable view? Eric Douglas <e.d.programmer@gmail.com> - 2020-06-17 04:38 -0700
    Re: Simple fix for JTable view? Martin Gregorie <martin@mydomain.invalid> - 2020-06-17 12:18 +0000
      Re: Simple fix for JTable view? Eric Douglas <e.d.programmer@gmail.com> - 2020-06-17 05:43 -0700
        Re: Simple fix for JTable view? Martin Gregorie <martin@mydomain.invalid> - 2020-06-17 13:08 +0000
      Re: Simple fix for JTable view? Eric Douglas <e.d.programmer@gmail.com> - 2020-06-17 06:08 -0700
        Re: Simple fix for JTable view? Eric Douglas <e.d.programmer@gmail.com> - 2020-06-17 08:07 -0700

#39507 — Simple fix for JTable view?

Here's a simple sample that reproduces what my app is doing.
If it matters, I am running JRE 11.0.7_10 from AdoptOpenJDK
If I scroll down and back up, the text on my table disappears.  It reappears if I click on the table.


    public static void main(String[] args) {

        EventQueue.invokeLater(() -> {
            JFrame win1 = new JFrame();
            Container p1 = win1.getContentPane();
            JPanel p2 = new JPanel();
            JPanel p3 = new JPanel();
            JPanel p4 = new JPanel();
            JPanel p5 = new JPanel();
            JPanel p6 = new JPanel();
            JPanel p7 = new JPanel();
            p5.add(p4);
            p6.add(p5);
            p7.add(p6);
            JScrollPane sp1 = new JScrollPane(p7);
            p1.add(p2);
            p2.add(p3);
            p3.add(sp1);
            win1.setPreferredSize(new Dimension(640,480));
            Object[][] data = new String[][] {{"data1"},{"data2"},{"data3"}};
            String[] cols = new String[] {"col1"};
            DefaultTableModel model = new DefaultTableModel(data,cols);
            JTable t1 = new JTable(model);
            p4.setLayout(new BoxLayout(p4, BoxLayout.PAGE_AXIS));
            p4.add(t1);
            for (int i = 0; i < 10; i++) {
                p4.add(new JLabel("Label " + i));
            }
            sp1.setPreferredSize(new Dimension(150,150));

            win1.setSize(new Dimension(800,600));
            win1.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
            win1.setVisible(true);
        });

    }

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#39508

On Wed, 17 Jun 2020 04:38:15 -0700, Eric Douglas wrote:

> Here's a simple sample that reproduces what my app is doing.
> If it matters, I am running JRE 11.0.7_10 from AdoptOpenJDK If I scroll
> down and back up, the text on my table disappears.  It reappears if I
> click on the table.
>
Works fine here (scrolls up and down, nothing getting blanked when its 
scrolled back into view.

Compiled and run with:

openjdk version "1.8.0_252"
OpenJDK Runtime Environment (build 1.8.0_252-b09)
OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)

running on

Linux version 5.6.16-200.fc31.x86_64 
(mockbuild@bkernel03.phx2.fedoraproject.org) 
(gcc version 9.3.1 20200408 (Red Hat 9.3.1-2) (GCC))

All I added to your code to get it to compile is:

import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class Eric
{

/*  --- your code here --- */

}


-- 
Martin    | martin at
Gregorie  | gregorie dot org

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#39509

On Wednesday, June 17, 2020 at 8:19:00 AM UTC-4, Martin Gregorie wrote:
> Works fine here (scrolls up and down, nothing getting blanked when its 
> scrolled back into view.
> 
> Compiled and run with:
> 
> openjdk version "1.8.0_252"
> OpenJDK Runtime Environment (build 1.8.0_252-b09)
> OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)
> 
> running on
> 
> Linux version 5.6.16-200.fc31.x86_64 
> (mockbuild@bkernel03.phx2.fedoraproject.org) 
> (gcc version 9.3.1 20200408 (Red Hat 9.3.1-2) (GCC))
> 
> All I added to your code to get it to compile is:
> 
> import java.awt.*;
> import javax.swing.*;
> import javax.swing.table.*;
> public class Eric
> {
> 
> /*  --- your code here --- */
> 
> }
> 
> 
Looks fine here as well, I just compiled it with Java 8, problem must be specific to Java 11.

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#39511

On Wed, 17 Jun 2020 05:43:38 -0700, Eric Douglas wrote:

> On Wednesday, June 17, 2020 at 8:19:00 AM UTC-4, Martin Gregorie wrote:
>> Works fine here (scrolls up and down, nothing getting blanked when its
>> scrolled back into view.
>> 
>> Compiled and run with:
>> 
>> openjdk version "1.8.0_252"
>> OpenJDK Runtime Environment (build 1.8.0_252-b09)
>> OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)
>> 
>> running on
>> 
>> Linux version 5.6.16-200.fc31.x86_64
>> (mockbuild@bkernel03.phx2.fedoraproject.org)
>> (gcc version 9.3.1 20200408 (Red Hat 9.3.1-2) (GCC))
>> 
>> All I added to your code to get it to compile is:
>> 
>> import java.awt.*;
>> import javax.swing.*;
>> import javax.swing.table.*;
>> public class Eric {
>> 
>> /*  --- your code here --- */
>> 
>> }
>> 
>> 
> Looks fine here as well, I just compiled it with Java 8, problem must be
> specific to Java 11.

Yep. When it worked OK here I thought that might be the case. If there's 
an accessable bug list for 11 it would be worth a quick scan and a bug 
report if its not a known bug.
 

-- 
Martin    | martin at
Gregorie  | gregorie dot org

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#39510

On Wednesday, June 17, 2020 at 8:19:00 AM UTC-4, Martin Gregorie wrote:
> Works fine here (scrolls up and down, nothing getting blanked when its 
> scrolled back into view.
> 
> Compiled and run with:
> 
> openjdk version "1.8.0_252"
> OpenJDK Runtime Environment (build 1.8.0_252-b09)
> OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)
> 
> running on
> 
> Linux version 5.6.16-200.fc31.x86_64 
> (mockbuild@bkernel03.phx2.fedoraproject.org) 
> (gcc version 9.3.1 20200408 (Red Hat 9.3.1-2) (GCC))
> 
> All I added to your code to get it to compile is:
> 
> import java.awt.*;
> import javax.swing.*;
> import javax.swing.table.*;
> public class Eric
> {
> 
> /*  --- your code here --- */
> 
> }
> 

Normally the JScrollPane puts a line around the table, I got around that like:
t1.setBorder(LineBorder.createBlackLineBorder());

It appears I'm running into this bug:
https://bugs.openjdk.java.net/browse/JDK-8201309

If I change the
p4.add(t1);

to:
p4.add(new JScrollPane(t1);

you can see scrolling down and back up still views the table fine, but the table is much bigger for some reason.  I need to add some methods to resize it back to what it was if I need to wrap it in another JScrollPane like that.
Using the Windows zip file v11 hotspot: https://adoptopenjdk.net/releases.html

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#39512

On Wednesday, June 17, 2020 at 9:08:10 AM UTC-4, Eric Douglas wrote:
> you can see scrolling down and back up still views the table fine, but the table is much bigger for some reason.  I need to add some methods to resize it back to what it was if I need to wrap it in another JScrollPane like that.
> Using the Windows zip file v11 hotspot: https://adoptopenjdk.net/releases.html

ok, I found the workaround.  https://stackoverflow.com/questions/13213645/set-size-of-jtable-in-jscrollpane-and-in-jpanel-with-the-size-of-the-jframe

so now it's


    public static void main(String[] args) {

        EventQueue.invokeLater(() -> {
            JFrame win1 = new JFrame();
            Container p1 = win1.getContentPane();
            JPanel p2 = new JPanel();
            JPanel p3 = new JPanel();
            JPanel p4 = new JPanel();
            JPanel p5 = new JPanel();
            JPanel p6 = new JPanel();
            JPanel p7 = new JPanel();
            p5.add(p4);
            p6.add(p5);
            p7.add(p6);
            JScrollPane sp1 = new JScrollPane(p7);
            p1.add(p2);
            p2.add(p3);
            p3.add(sp1);
            win1.setPreferredSize(new Dimension(640,480));
            Object[][] data = new String[][] {{"data1"},{"data2"},{"data3"}};
            String[] cols = new String[] {"col1"};
            DefaultTableModel model = new DefaultTableModel(data,cols);
            JTable t1 = new JTable(model);
            p4.setLayout(new BoxLayout(p4, BoxLayout.PAGE_AXIS));
            JScrollPane sp2 = new JScrollPane(t1);
            t1.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
            t1.setPreferredScrollableViewportSize(t1.getPreferredSize());
            t1.setFillsViewportHeight(true);
            p4.add(sp2);
            t1.setTableHeader(null);
            sp2.setBorder(null);
            for (int i = 0; i < 10; i++) {
                p4.add(new JLabel("Label " + i));
            }
            sp1.setPreferredSize(new Dimension(150,150));

            win1.setSize(new Dimension(800,600));
            win1.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
            win1.setVisible(true);
        });

    }
and yes all basic JRE imports
import java.awt.Container;
import java.awt.Dimension;
import java.awt.EventQueue;

import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.WindowConstants;
import javax.swing.table.DefaultTableModel;

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