# 3
Here is an SSCCE which might be of help:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.table.*;
import javax.swing.event.TableModelEvent;
import javax.swing.table.AbstractTableModel;
import javax.swing.event.TableModelListener;
import javax.swing.text.DefaultEditorKit;
import java.util.*;
import java.io.*;
import java.util.List;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
public class Demo extends JPanel
implements KeyListener, ActionListener, ItemListener {
public final int NUM_RECS = 4;
MyTableModel mainTable;
TableSorter sorter;
JTable table;
JPanel mainPanel, top;
static JFrame frame;
private MouseListener mouseListener;
public Demo() {
top = new JPanel();
sorter = new TableSorter(new MyTableModel());
table = new JTable(sorter);
sorter.setTableHeader(table.getTableHeader());
// We want a horizontal scroller, not auto-resize as we shrink/grow the table
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
//Add the scroll pane to this panel.
top.add(scrollPane);
setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
//Add all panels to the main panel.
add(top);
vLoadTableData();
}
public void actionPerformed(ActionEvent e) {
String strCommand = e.getActionCommand();
}
public void itemStateChanged(ItemEvent e) {
JMenuItem source = (JMenuItem)(e.getSource());
}
public void keyTyped(KeyEvent e) {}
public void keyPressed(KeyEvent e) {}
public void keyReleased(KeyEvent e) {}
protected void displayInfo(KeyEvent e, String s){}
public void vLoadTableData() {
TableColumn column = null;
column = table.getColumnModel().getColumn(0);
column.setPreferredWidth(50);
column = table.getColumnModel().getColumn(1);
column.setPreferredWidth(40);
column = table.getColumnModel().getColumn(2);
column.setCellEditor(new TablePopupEditor("Edit Description text"));
column.setPreferredWidth(350);
}
class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"Publish", "ID", "Description"};
private Object[][] data;
MyTableModel() {
data = new Object[NUM_RECS][3];
// Sample data
data[0][0] = false;
data[0][1] = (int)101;
data[0][2] = "This is a book that is being sold at the present time. Buy yours today!";
data[1][0] = true;
data[1][1] = (int)102;
data[1][2] = "Gripping, thrilling, exciting. Tells how to grow tomatoes in your own backyard!";
data[2][0] = true;
data[2][1] = (int)103;
data[2][2] = "A story about a dog that attacks Kansas City.";
data[3][0] = false;
data[3][1] = (int)104;
data[3][2] = "Learn how to write an SSCCE that your Java forum will love.";
}
public int getColumnCount() {
return columnNames.length;
}
public int getRowCount() {
return data.length;
}
public String getColumnName(int col) {
return columnNames[col];
}
public Object getValueAt(int row, int col) {
return data[row][col];
}
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
public boolean isCellEditable(int row, int col) {
return true;
}
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
}
}
private static void createAndShowGUI() {
JFrame.setDefaultLookAndFeelDecorated(false);
frame = new JFrame("Test of Product database");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
Demo newContentPane = new Demo();
newContentPane.setOpaque(true);
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
class TableSorter extends AbstractTableModel {
protected TableModel tableModel;
public static final int DESCENDING = -1;
public static final int NOT_SORTED = 0;
public static final int ASCENDING = 1;
private static Directive EMPTY_DIRECTIVE = new Directive(-1, NOT_SORTED);
public static final Comparator COMPARABLE_COMAPRATOR = new Comparator() {
public int compare(Object o1, Object o2) {
return ((Comparable) o1).compareTo(o2);
}
};
public static final Comparator LEXICAL_COMPARATOR = new Comparator() {
public int compare(Object o1, Object o2) {
return o1.toString().compareTo(o2.toString());
}
};
private Row[] viewToModel;
private int[] modelToView;
private JTableHeader tableHeader;
private MouseListener mouseListener;
private TableModelListener tableModelListener;
private Map columnComparators = new HashMap();
private List sortingColumns = new ArrayList();
public TableSorter() {
this.mouseListener = new MouseHandler();
this.tableModelListener = new TableModelHandler();
}
public TableSorter(TableModel tableModel) {
this();
setTableModel(tableModel);
}
public TableSorter(TableModel tableModel, JTableHeader tableHeader) {
this();
setTableHeader(tableHeader);
setTableModel(tableModel);
}
private void clearSortingState() {
viewToModel = null;
modelToView = null;
}
public TableModel getTableModel() {
return tableModel;
}
public void setTableModel(TableModel tableModel) {
if (this.tableModel != null) {
this.tableModel.removeTableModelListener(tableModelListener);
}
this.tableModel = tableModel;
if (this.tableModel != null) {
this.tableModel.addTableModelListener(tableModelListener);
}
clearSortingState();
fireTableStructureChanged();
}
public JTableHeader getTableHeader() {
return tableHeader;
}
public void setTableHeader(JTableHeader tableHeader) {
if (this.tableHeader != null) {
this.tableHeader.removeMouseListener(mouseListener);
TableCellRenderer defaultRenderer = this.tableHeader.getDefaultRenderer();
if (defaultRenderer instanceof SortableHeaderRenderer) {
this.tableHeader.setDefaultRenderer(((SortableHeaderRenderer) defaultRenderer).tableCellRenderer);
}
}
this.tableHeader = tableHeader;
if (this.tableHeader != null) {
this.tableHeader.addMouseListener(mouseListener);
this.tableHeader.setDefaultRenderer(
new SortableHeaderRenderer(this.tableHeader.getDefaultRenderer()));
}
}
public boolean isSorting() {
return sortingColumns.size() != 0;
}
private Directive getDirective(int column) {
for (int i = 0; i < sortingColumns.size(); i++) {
Directive directive = (Directive)sortingColumns.get(i);
if (directive.column == column) {
return directive;
}
}
return EMPTY_DIRECTIVE;
}
public int getSortingStatus(int column) {
return getDirective(column).direction;
}
private void sortingStatusChanged() {
clearSortingState();
fireTableDataChanged();
if (tableHeader != null) {
tableHeader.repaint();
}
}
public void setSortingStatus(int column, int status) {
Directive directive = getDirective(column);
if (directive != EMPTY_DIRECTIVE) {
sortingColumns.remove(directive);
}
if (status != NOT_SORTED) {
sortingColumns.add(new Directive(column, status));
}
sortingStatusChanged();
}
protected Icon getHeaderRendererIcon(int column, int size) {
Directive directive = getDirective(column);
if (directive == EMPTY_DIRECTIVE) {
return null;
}
return new Arrow(directive.direction == DESCENDING, size, sortingColumns.indexOf(directive));
}
private void cancelSorting() {
sortingColumns.clear();
sortingStatusChanged();
}
public void setColumnComparator(Class type, Comparator comparator) {
if (comparator == null) {
columnComparators.remove(type);
} else {
columnComparators.put(type, comparator);
}
}
protected Comparator getComparator(int column) {
Class columnType = tableModel.getColumnClass(column);
Comparator comparator = (Comparator) columnComparators.get(columnType);
if (comparator != null) {
return comparator;
}
if (Comparable.class.isAssignableFrom(columnType)) {
return COMPARABLE_COMAPRATOR;
}
return LEXICAL_COMPARATOR;
}
private Row[] getViewToModel() {
if (viewToModel == null) {
int tableModelRowCount = tableModel.getRowCount();
viewToModel = new Row[tableModelRowCount];
for (int row = 0; row < tableModelRowCount; row++) {
viewToModel[row] = new Row(row);
}
if (isSorting()) {
Arrays.sort(viewToModel);
}
}
return viewToModel;
}
public int modelIndex(int viewIndex) {
return getViewToModel()[viewIndex].modelIndex;
}
private int[] getModelToView() {
if (modelToView == null) {
int n = getViewToModel().length;
modelToView = new int[n];
for (int i = 0; i < n; i++) {
modelToView[modelIndex(i)] = i;
}
}
return modelToView;
}
// TableModel interface methods
public int getRowCount() {
return (tableModel == null) ? 0 : tableModel.getRowCount();
}
public int getColumnCount() {
return (tableModel == null) ? 0 : tableModel.getColumnCount();
}
public String getColumnName(int column) {
return tableModel.getColumnName(column);
}
public Class getColumnClass(int column) {
return tableModel.getColumnClass(column);
}
public boolean isCellEditable(int row, int column) {
return tableModel.isCellEditable(modelIndex(row), column);
}
public Object getValueAt(int row, int column) {
return tableModel.getValueAt(modelIndex(row), column);
}
public void setValueAt(Object aValue, int row, int column) {
tableModel.setValueAt(aValue, modelIndex(row), column);
}
// Helper classes
private class Row implements Comparable {
private int modelIndex;
public Row(int index) {
this.modelIndex = index;
}
public int compareTo(Object o) {
int row1 = modelIndex;
int row2 = ((Row) o).modelIndex;
for (Iterator it = sortingColumns.iterator(); it.hasNext();) {
Directive directive = (Directive) it.next();
int column = directive.column;
Object o1 = tableModel.getValueAt(row1, column);
Object o2 = tableModel.getValueAt(row2, column);
int comparison = 0;
// Define null less than everything, except null.
if (o1 == null && o2 == null) {
comparison = 0;
} else if (o1 == null) {
comparison = -1;
} else if (o2 == null) {
comparison = 1;
} else {
comparison = getComparator(column).compare(o1, o2);
}
if (comparison != 0) {
return directive.direction == DESCENDING ? -comparison : comparison;
}
}
return 0;
}
}
private class TableModelHandler implements TableModelListener {
public void tableChanged(TableModelEvent e) {
// If we're not sorting by anything, just pass the event along.
if (!isSorting()) {
clearSortingState();
fireTableChanged(e);
return;
}
// If the table structure has changed, cancel the sorting; the
// sorting columns may have been either moved or deleted from
// the model.
if (e.getFirstRow() == TableModelEvent.HEADER_ROW) {
cancelSorting();
fireTableChanged(e);
return;
}
// We can map a cell event through to the view without widening
// when the following conditions apply:
//
// a) all the changes are on one row (e.getFirstRow() == e.getLastRow()) and,
// b) all the changes are in one column (column != TableModelEvent.ALL_COLUMNS) and,
// c) we are not sorting on that column (getSortingStatus(column) == NOT_SORTED) and,
// d) a reverse lookup will not trigger a sort (modelToView != null)
//
// Note: INSERT and DELETE events fail this test as they have column == ALL_COLUMNS.
//
// The last check, for (modelToView != null) is to see if modelToView
// is already allocated. If we don't do this check; sorting can become
// a performance bottleneck for applications where cells
// change rapidly in different parts of the table. If cells
// change alternately in the sorting column and then outside of
// it this class can end up re-sorting on alternate cell updates -
// which can be a performance problem for large tables. The last
// clause avoids this problem.
int column = e.getColumn();
if (e.getFirstRow() == e.getLastRow()
&& column != TableModelEvent.ALL_COLUMNS
&& getSortingStatus(column) == NOT_SORTED
&& modelToView != null) {
int viewIndex = getModelToView()[e.getFirstRow()];
fireTableChanged(new TableModelEvent(TableSorter.this,
viewIndex, viewIndex,
column, e.getType()));
return;
}
// Something has happened to the data that may have invalidated the row order.
clearSortingState();
fireTableDataChanged();
return;
}
}
private class MouseHandler extends MouseAdapter {
public void mouseClicked(MouseEvent e) {
JTableHeader h = (JTableHeader) e.getSource();
TableColumnModel columnModel = h.getColumnModel();
int viewColumn = columnModel.getColumnIndexAtX(e.getX());
int column = columnModel.getColumn(viewColumn).getModelIndex();
if (column != -1) {
int status = getSortingStatus(column);
if (!e.isControlDown()) {
cancelSorting();
}
// Cycle the sorting states through {NOT_SORTED, ASCENDING, DESCENDING} or
// {NOT_SORTED, DESCENDING, ASCENDING} depending on whether shift is pressed.
status = status + (e.isShiftDown() ? -1 : 1);
status = (status + 4) % 3 - 1; // signed mod, returning {-1, 0, 1}
setSortingStatus(column, status);
}
}
}
private static class Arrow implements Icon {
private boolean descending;
private int size;
private int priority;
public Arrow(boolean descending, int size, int priority) {
this.descending = descending;
this.size = size;
this.priority = priority;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
Color color = c == null ? Color.GRAY : c.getBackground();
// In a compound sort, make each succesive triangle 20%
// smaller than the previous one.
int dx = (int)(size/2*Math.pow(0.8, priority));
int dy = descending ? dx : -dx;
// Align icon (roughly) with font baseline.
y = y + 5*size/6 + (descending ? -dy : 0);
int shift = descending ? 1 : -1;
g.translate(x, y);
// Right diagonal.
g.setColor(color.darker());
g.drawLine(dx / 2, dy, 0, 0);
g.drawLine(dx / 2, dy + shift, 0, shift);
// Left diagonal.
g.setColor(color.brighter());
g.drawLine(dx / 2, dy, dx, 0);
g.drawLine(dx / 2, dy + shift, dx, shift);
// Horizontal line.
if (descending) {
g.setColor(color.darker().darker());
} else {
g.setColor(color.brighter().brighter());
}
g.drawLine(dx, 0, 0, 0);
g.setColor(color);
g.translate(-x, -y);
}
public int getIconWidth() {
return size;
}
public int getIconHeight() {
return size;
}
}
private class SortableHeaderRenderer implements TableCellRenderer {
private TableCellRenderer tableCellRenderer;
public SortableHeaderRenderer(TableCellRenderer tableCellRenderer) {
this.tableCellRenderer = tableCellRenderer;
}
public Component getTableCellRendererComponent(JTable table,
Object value,
boolean isSelected,
boolean hasFocus,
int row,
int column) {
Component c = tableCellRenderer.getTableCellRendererComponent(table,
value, isSelected, hasFocus, row, column);
if (c instanceof JLabel) {
JLabel l = (JLabel) c;
l.setHorizontalTextPosition(JLabel.LEFT);
int modelColumn = table.convertColumnIndexToModel(column);
l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
}
return c;
}
}
private static class Directive {
private int column;
private int direction;
public Directive(int column, int direction) {
this.column = column;
this.direction = direction;
}
}
}
class TablePopupEditor extends DefaultCellEditor
implements TableCellEditor, ActionListener {
private PopupDialog popup;
private String currentText = "";
private JButton editorComponent;
String newline = "\n";
JTextArea output;
JScrollPane scrollPane;
JPanel contentPane;
public TablePopupEditor(String strHeading)
{
super(new JTextField());
setClickCountToStart(1);
// Use a JButton as the editor component
editorComponent = new JButton();
editorComponent.setBackground(Color.white);
editorComponent.setBorderPainted(false);
editorComponent.setContentAreaFilled( false );
// editorComponent.addActionListener( this );
// Set up the dialog where we do the actual editing
popup = new PopupDialog(strHeading);
createPopupMenu();
}
public void createPopupMenu() {
JMenuItem menuItem;
//Create the popup menu.
JPopupMenu contextMenu = new JPopupMenu();
menuItem = new JMenuItem(new DefaultEditorKit.CopyAction());
menuItem.setText("Copy");
menuItem.setMnemonic(KeyEvent.VK_C);
menuItem.addActionListener(this);
contextMenu.add(menuItem);
menuItem = new JMenuItem(new DefaultEditorKit.CutAction());
menuItem.setText("Cut");
menuItem.setMnemonic(KeyEvent.VK_T);
menuItem.addActionListener(this);
contextMenu.add(menuItem);
menuItem = new JMenuItem(new DefaultEditorKit.PasteAction());
menuItem.setText("Paste");
menuItem.setMnemonic(KeyEvent.VK_P);
menuItem.addActionListener(this);
contextMenu.add(menuItem);
//Add listener to the text area so the popup menu can come up.
MouseListener popupListener = new PopupListener(contextMenu);
editorComponent.addMouseListener(popupListener);
popup.addMouseListener(popupListener);
}
public Object getCellEditorValue()
{
return currentText;
}
public Component getTableCellEditorComponent(
JTable table, Object value, boolean isSelected, int row, int column)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
popup.setText( currentText );
popup.setLocationRelativeTo( editorComponent );
popup.show();
fireEditingStopped();
}
});
currentText = value.toString();
editorComponent.setText( currentText );
return editorComponent;
}
/*
*When the editor button is clicked display the editing dialog
*/
public void actionPerformed(ActionEvent e)
{
popup.setText( currentText );
popup.setLocationRelativeTo( editorComponent );
popup.show();
// Since dialog is modal editing will only stop when the
// dialog is closed
fireEditingStopped();
}
// Returns just the class name -- no package info.
protected String getClassName(Object o) {
String classString = o.getClass().getName();
int dotIndex = classString.lastIndexOf(".");
return classString.substring(dotIndex+1);
}
/*
*Simple dialog containing the actual editing component
*/
class PopupDialog extends JDialog implements ActionListener
{
private JTextArea textArea;
public PopupDialog(String strHeading)
{
super((Frame)null, strHeading, true);
setDefaultLookAndFeelDecorated(false);
textArea = new JTextArea(7, 30);
textArea.setLineWrap( true );
textArea.setWrapStyleWord( true );
KeyStroke keyStroke = KeyStroke.getKeyStroke("ENTER");
textArea.getInputMap().put(keyStroke, "none");
JScrollPane scrollPane = new JScrollPane( textArea );
getContentPane().add( scrollPane );
JButton cancel = new JButton("Cancel");
cancel.addActionListener( this );
JButton ok = new JButton("Ok");
ok.setPreferredSize( cancel.getPreferredSize() );
ok.addActionListener( this );
JPanel buttons = new JPanel();
buttons.add( ok );
buttons.add( cancel );
getContentPane().add(buttons, BorderLayout.SOUTH);
pack();
getRootPane().setDefaultButton( ok );
}
public void setText(String text) {
textArea.setText( text );
}
/*
*Save the changed text before hiding the popup
*/
public void actionPerformed(ActionEvent e)
{
if ("Ok".equals( e.getActionCommand() ) )
{
currentText = textArea.getText();
}
textArea.requestFocusInWindow();
setVisible( false );
}
}
}
class PopupListener extends MouseAdapter {
JPopupMenu popup;
PopupListener(JPopupMenu popupMenu) {
popup = popupMenu;
}
public void mousePressed(MouseEvent e) {
maybeShowPopup(e);
}
public void mouseReleased(MouseEvent e) {
maybeShowPopup(e);
}
private void maybeShowPopup(MouseEvent e) {
if (e.isPopupTrigger()) {
popup.show(e.getComponent(),
e.getX(), e.getY());
}
}
}
# 5
Sorry about that. I took out the TableSorter class, which indeed wasn't necesary. Now it's much shorter:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.table.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.text.DefaultEditorKit;
import java.util.*;
import java.io.*;
import java.util.List;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
public class Demo extends JPanel
implements KeyListener, ActionListener, ItemListener {
public final int NUM_RECS = 4;
MyTableModel mainTable;
JTable table;
JPanel mainPanel, top;
static JFrame frame;
private MouseListener mouseListener;
public Demo() {
top = new JPanel();
table = new JTable(new MyTableModel());
// We want a horizontal scroller, not auto-resize as we shrink/grow the table
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
//Add the scroll pane to this panel.
top.add(scrollPane);
setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
//Add all panels to the main panel.
add(top);
vLoadTableData();
}
public void actionPerformed(ActionEvent e) {
String strCommand = e.getActionCommand();
}
public void itemStateChanged(ItemEvent e) {
JMenuItem source = (JMenuItem)(e.getSource());
}
public void keyTyped(KeyEvent e) {}
public void keyPressed(KeyEvent e) {}
public void keyReleased(KeyEvent e) {}
protected void displayInfo(KeyEvent e, String s){}
public void vLoadTableData() {
TableColumn column = null;
column = table.getColumnModel().getColumn(0);
column.setPreferredWidth(50);
column = table.getColumnModel().getColumn(1);
column.setPreferredWidth(40);
column = table.getColumnModel().getColumn(2);
column.setCellEditor(new TablePopupEditor("Edit Description text"));
column.setPreferredWidth(350);
}
class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"Publish", "ID", "Description"};
private Object[][] data;
MyTableModel() {
data = new Object[NUM_RECS][3];
// Sample data
data[0][0] = false;
data[0][1] = (int)101;
data[0][2] = "This is a book that is being sold at the present time. Buy yours today!";
data[1][0] = true;
data[1][1] = (int)102;
data[1][2] = "Gripping, thrilling, exciting. Tells how to grow tomatoes in your own backyard!";
data[2][0] = true;
data[2][1] = (int)103;
data[2][2] = "A story about a dog that attacks Kansas City.";
data[3][0] = false;
data[3][1] = (int)104;
data[3][2] = "Learn how to write an SSCCE that your Java forum will love.";
}
public int getColumnCount() {
return columnNames.length;
}
public int getRowCount() {
return data.length;
}
public String getColumnName(int col) {
return columnNames[col];
}
public Object getValueAt(int row, int col) {
return data[row][col];
}
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
public boolean isCellEditable(int row, int col) {
return true;
}
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
}
}
private static void createAndShowGUI() {
JFrame.setDefaultLookAndFeelDecorated(false);
frame = new JFrame("Test of Product database");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
Demo newContentPane = new Demo();
newContentPane.setOpaque(true);
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
class TablePopupEditor extends DefaultCellEditor
implements TableCellEditor, ActionListener {
private PopupDialog popup;
private String currentText = "";
private JButton editorComponent;
String newline = "\n";
JTextArea output;
JScrollPane scrollPane;
JPanel contentPane;
public TablePopupEditor(String strHeading)
{
super(new JTextField());
setClickCountToStart(1);
// Use a JButton as the editor component
editorComponent = new JButton();
editorComponent.setBackground(Color.white);
editorComponent.setBorderPainted(false);
editorComponent.setContentAreaFilled( false );
// editorComponent.addActionListener( this );
// Set up the dialog where we do the actual editing
popup = new PopupDialog(strHeading);
createPopupMenu();
}
public void createPopupMenu() {
JMenuItem menuItem;
//Create the popup menu.
JPopupMenu contextMenu = new JPopupMenu();
menuItem = new JMenuItem(new DefaultEditorKit.CopyAction());
menuItem.setText("Copy");
menuItem.setMnemonic(KeyEvent.VK_C);
menuItem.addActionListener(this);
contextMenu.add(menuItem);
menuItem = new JMenuItem(new DefaultEditorKit.CutAction());
menuItem.setText("Cut");
menuItem.setMnemonic(KeyEvent.VK_T);
menuItem.addActionListener(this);
contextMenu.add(menuItem);
menuItem = new JMenuItem(new DefaultEditorKit.PasteAction());
menuItem.setText("Paste");
menuItem.setMnemonic(KeyEvent.VK_P);
menuItem.addActionListener(this);
contextMenu.add(menuItem);
//Add listener to the text area so the popup menu can come up.
MouseListener popupListener = new PopupListener(contextMenu);
editorComponent.addMouseListener(popupListener);
popup.addMouseListener(popupListener);
}
public Object getCellEditorValue()
{
return currentText;
}
public Component getTableCellEditorComponent(
JTable table, Object value, boolean isSelected, int row, int column)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
popup.setText( currentText );
popup.setLocationRelativeTo( editorComponent );
popup.show();
fireEditingStopped();
}
});
currentText = value.toString();
editorComponent.setText( currentText );
return editorComponent;
}
/*
*When the editor button is clicked display the editing dialog
*/
public void actionPerformed(ActionEvent e)
{
popup.setText( currentText );
popup.setLocationRelativeTo( editorComponent );
popup.show();
// Since dialog is modal editing will only stop when the
// dialog is closed
fireEditingStopped();
}
// Returns just the class name -- no package info.
protected String getClassName(Object o) {
String classString = o.getClass().getName();
int dotIndex = classString.lastIndexOf(".");
return classString.substring(dotIndex+1);
}
/*
*Simple dialog containing the actual editing component
*/
class PopupDialog extends JDialog implements ActionListener
{
private JTextArea textArea;
public PopupDialog(String strHeading)
{
super((Frame)null, strHeading, true);
setDefaultLookAndFeelDecorated(false);
textArea = new JTextArea(7, 30);
textArea.setLineWrap( true );
textArea.setWrapStyleWord( true );
KeyStroke keyStroke = KeyStroke.getKeyStroke("ENTER");
textArea.getInputMap().put(keyStroke, "none");
JScrollPane scrollPane = new JScrollPane( textArea );
getContentPane().add( scrollPane );
JButton cancel = new JButton("Cancel");
cancel.addActionListener( this );
JButton ok = new JButton("Ok");
ok.setPreferredSize( cancel.getPreferredSize() );
ok.addActionListener( this );
JPanel buttons = new JPanel();
buttons.add( ok );
buttons.add( cancel );
getContentPane().add(buttons, BorderLayout.SOUTH);
pack();
getRootPane().setDefaultButton( ok );
}
public void setText(String text) {
textArea.setText( text );
}
/*
*Save the changed text before hiding the popup
*/
public void actionPerformed(ActionEvent e)
{
if ("Ok".equals( e.getActionCommand() ) )
{
currentText = textArea.getText();
}
textArea.requestFocusInWindow();
setVisible( false );
}
}
}
class PopupListener extends MouseAdapter {
JPopupMenu popup;
PopupListener(JPopupMenu popupMenu) {
popup = popupMenu;
}
public void mousePressed(MouseEvent e) {
maybeShowPopup(e);
}
public void mouseReleased(MouseEvent e) {
maybeShowPopup(e);
}
private void maybeShowPopup(MouseEvent e) {
if (e.isPopupTrigger()) {
popup.show(e.getComponent(),
e.getX(), e.getY());
}
}
}
