这是组合单元格插图复制演示：
import java.awt.*;
import java.awt.event.*;
import java.util.EventObject;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class ComboCellInsetsDemo {
public JComponent makeUI() {
String[] columnNames = {"Name", "Check", "Condition"};
Object[][] data = {
{"bbb", false, "="}, {"aaa", true, "<"}
};
DefaultTableModel model = new DefaultTableModel(data, columnNames) {
@Override public Class<?> getColumnClass(int column) {
return getValueAt(0, column).getClass();
}
};
JTable table = new JTable(model);
table.setRowHeight(36);
table.setAutoCreateRowSorter(true);
TableColumn column = table.getColumnModel().getColumn(2);
column.setCellRenderer(new ComboBoxCellRenderer());
column.setCellEditor(new ComboBoxCellEditor());
return new JScrollPane(table);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override public void run() {
createAndShowGUI();
}
});
}
public static void createAndShowGUI() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.getContentPane().add(new ComboCellInsetsDemo().makeUI());
f.setSize(320, 240);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
}
class ComboBoxPanel extends JPanel {
private String[] m = new String[] {">", "<", "=", "<="};
protected JComboBox<String> comboBox = new JComboBox<String>(m) {
@Override public Dimension getPreferredSize() {
Dimension d = super.getPreferredSize();
return new Dimension(40, d.height);
}
};
public ComboBoxPanel() {
super();
setOpaque(true);
comboBox.setEditable(true);
add(comboBox);
}
}
class ComboBoxCellRenderer extends ComboBoxPanel
implements TableCellRenderer {
public ComboBoxCellRenderer() {
super();
setName("Table.cellRenderer");
}
@Override public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
setBackground(isSelected?table.getSelectionBackground()
:table.getBackground());
if(value!=null) {
comboBox.setSelectedItem(value);
}
return this;
}
}
class ComboBoxCellEditor extends ComboBoxPanel
implements TableCellEditor {
public ComboBoxCellEditor() {
super();
comboBox.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent e) {
fireEditingStopped();
}
});
addMouseListener(new MouseAdapter() {
@Override public void mousePressed(MouseEvent e) {
fireEditingStopped();
}
});
}
@Override public Component getTableCellEditorComponent(
JTable table, Object value, boolean isSelected, int row, int column) {
this.setBackground(table.getSelectionBackground());
comboBox.setSelectedItem(value);
return this;
}
//Copid from DefaultCellEditor.EditorDelegate
@Override public Object getCellEditorValue() {
return comboBox.getSelectedItem();
}
@Override public boolean shouldSelectCell(EventObject anEvent) {
if(anEvent instanceof MouseEvent) {
MouseEvent e = (MouseEvent)anEvent;
return e.getID() != MouseEvent.MOUSE_DRAGGED;
}
return true;
}
@Override public boolean stopCellEditing() {
if(comboBox.isEditable()) {
comboBox.actionPerformed(new ActionEvent(this, 0, ""));
}
fireEditingStopped();
return true;
}
//Copid from AbstractCellEditor
//protected EventListenerList listenerList = new EventListenerList();
transient protected ChangeEvent changeEvent = null;
@Override public boolean isCellEditable(EventObject e) {
return true;
}
@Override public void cancelCellEditing() {
fireEditingCanceled();
}
@Override public void addCellEditorListener(CellEditorListener l) {
listenerList.add(CellEditorListener.class, l);
}
@Override public void removeCellEditorListener(CellEditorListener l) {
listenerList.remove(CellEditorListener.class, l);
}
public CellEditorListener[] getCellEditorListeners() {
return listenerList.getListeners(CellEditorListener.class);
}
protected void fireEditingStopped() {
// Guaranteed to return a non-null array
Object[] listeners = listenerList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for(int i = listeners.length-2; i>=0; i-=2) {
if(listeners[i]==CellEditorListener.class) {
// Lazily create the event:
if(changeEvent == null) changeEvent = new ChangeEvent(this);
((CellEditorListener)listeners[i+1]).editingStopped(changeEvent);
}
}
}
protected void fireEditingCanceled() {
// Guaranteed to return a non-null array
Object[] listeners = listenerList.getListenerList();
// Process the listeners last to first, notifying
// those that are interested in this event
for(int i = listeners.length-2; i>=0; i-=2) {
if(listeners[i]==CellEditorListener.class) {
// Lazily create the event:
if(changeEvent == null) changeEvent = new ChangeEvent(this);
((CellEditorListener)listeners[i+1]).editingCanceled(changeEvent);
}
}
}
}
