How to have multiple JTable headers synchronize their column widths, sorting, etc?
I have an interface that has multiple small JTables stacked on top of each other. I would like their column sizes, sorting, filtering, etc to stay in sync. Is there a straightforward way to do this?
For the column widths, I tried having them share a common TableHeaderModel but this seemed to pose unexpected problems such as only being able to resize using the last table added. I could live with just having their column widths stay in sync while being able to resize using any of the tables if someone has a solution to that.
I have posted a code example below. When run you notice that you can not resize the first or second table headers, but the third one resizes them all. I want the behavior of the third table, but from any of the table headers.
Thank you.
package javaapplication5;
public class NewJFrame extends javax.swing.JFrame {
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JTable jTable1;
private javax.swing.JTable jTable2;
private javax.swing.JTable jTable3;
public NewJFrame() {
initComponents();
jTable2.setColumnModel(jTable1.getColumnModel());
jTable3.setColumnModel(jTable1.getColumnModel());
}
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
jScrollPane2 = new javax.swing.JScrollPane();
jTable2 = new javax.swing.JTable();
jScrollPane3 = new javax.swing.JScrollPane();
jTable3 = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
getContentPane().setLayout(new javax.swing.BoxLayout(getContentPane(),
javax.swing.BoxLayout.Y_AXIS));
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{"a", "b", "c", "d"},
{"e", "f", "g", "h"},
{"i", "j", "k", "l"},
{"m", "n", "o", "p"}
},
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
}
));
jScrollPane1.setViewportView(jTable1);
getContentPane().add(jScrollPane1);
jTable2.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{"q", "r", "s", "t"},
{"u", "v", "w", "x"},
{"y", "z", "1", "2"},
{"3", "4", "5", "6"}
},
new String [] {
"Title 1", "T开发者_StackOverflowitle 2", "Title 3", "Title 4"
}
));
jScrollPane2.setViewportView(jTable2);
getContentPane().add(jScrollPane2);
jTable3.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{"7", "8", "9", "10"},
{"11", "12", "13", "14"},
{"15", "16", "17", "18"},
{"19", "20", "21", "22"}
},
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
}
));
jScrollPane3.setViewportView(jTable3);
getContentPane().add(jScrollPane3);
pack();
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
}
});
}
}
While waiting for an answer, I stumbled upon a fix to my problem. It is apparently a known bug. I used the solution posted here, with a change in the comments below it.
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4816146
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.table.*;
class Application extends JFrame
{
public Application()
{
this.setBounds(100,100,500,200);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
String data[][] = {{"a1","b1","c1"},{"a2","b2","c2"},{"a3","b3","c3"}};
String columnNames[] = {"a","b","c"};
JTable jtable = new JTable(new DefaultTableModel(data,columnNames));
JScrollPane jscrollPane = new JScrollPane(jtable,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
jscrollPane.setBorder(new CompoundBorder(new MatteBorder(0,0,1,0,Color.gray),new EmptyBorder(0,0,0,0)));
this.add(jscrollPane,BorderLayout.CENTER);
JTable jtable_footer = new JTable(new DefaultTableModel(3,columnNames.length),jtable.getColumnModel());
SyncListener syncListener = new SyncListener(jtable,jtable_footer);
this.add(jtable_footer,BorderLayout.SOUTH);
}
public static void main(String args[])
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
Application application = new Application();
application.setVisible(true);
}
});
}
}
class SyncListener implements TableColumnModelListener
{
JTable jtable_data;
JTable jtable_footer;
public SyncListener(JTable main, JTable footer)
{
jtable_data = main;
jtable_footer = footer;
DefaultTableColumnModel dtcm = (DefaultTableColumnModel)jtable_data.getColumnModel();
// this is the listener causing resize problems
dtcm.removeColumnModelListener(dtcm.getColumnModelListeners()[1]);
dtcm.addColumnModelListener(this);
}
public void columnMarginChanged(ChangeEvent changeEvent)
{
for (int column = 0; column < jtable_data.getColumnCount(); column++)
{
jtable_footer.getColumnModel().getColumn(column).setWidth(jtable_data.getColumnModel().getColumn(column).getWidth());
}
jtable_footer.repaint();
}
public void columnAdded(TableColumnModelEvent e){}
public void columnMoved(TableColumnModelEvent e){}
public void columnRemoved(TableColumnModelEvent e){}
public void columnSelectionChanged(ListSelectionEvent e){}
}
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