问题
I have added radio buttons to a JTable using renderer and editor. I have also created group for the same. I'm unable to achieve the exclusiveness (only 1 radio button should be selected) using this principle. Please see my code below and appreciate your response.
Renderer and Editor classes:
class RadioButtonRenderer implements TableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
if (value == null)
return null;
return (Component) value;
}
}
class RadioButtonEditor extends DefaultCellEditor implements ItemListener {
private JRadioButton button;
public RadioButtonEditor(JCheckBox checkBox) {
super(checkBox);
}
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
if (value == null)
return null;
button = (JRadioButton) value;
button.addItemListener(this);
return (Component) value;
}
public Object getCellEditorValue() {
button.removeItemListener(this);
return button;
}
public void itemStateChanged(ItemEvent e) {
super.fireEditingStopped();
}
}
This is where the data is prepared and the grouping is done:
private void displayPhoneListShow(Person person) {
DefaultTableModel dm = new DefaultTableModel() {
@Override
public boolean isCellEditable(int row, int column) {
return true;
}
};
Object[] objects = new Object[3];
Object[] tableColumnNamesPhone = new Object[3];
tableColumnNamesPhone[0] = "Select";
tableColumnNamesPhone[1] = "Phone Number";
tableColumnNamesPhone[2] = "Preferred";
dm.setColumnIdentifiers(tableColumnNamesPhone);
ListIterator<Phone> phoneList = person.getPhoneList().listIterator();
while (phoneList.hasNext()) {
Phone phone = phoneList.next();
objects[0] = new JRadioButton(("^"));
objects[1] = phone.getPhoneNumber();
objects[2] = phone.getPreferred();
dm.addRow(objects);
}
this.phoneTable.setModel(dm);
ButtonGroup group = new ButtonGroup();
for (int row = 0; row < dm.getRowCount(); row++) {
JRadioButton radio = (JRadioButton) dm.getValueAt(row, 0);
group.add(radio);
}
phoneTable.getColumn("Select").setCellRenderer(
new RadioButtonRenderer());
phoneTable.getColumn("Select").setCellEditor(
new RadioButtonEditor(new JCheckBox()));
}
I am still unable to achieve the result. I have also tried adding ButtonGroup group = new ButtonGroup() as a class variable and also part of the RadioButtonRenderer class and added buttons to this group. But results were indifferent.
Please suggest.
回答1:
As an alternative, use a JComboBox as an editor for mutually exclusive choices within a row. For convenience, DefaultCellEditor offers a constructor especially for this. The result also makes more efficient use of horizontal space in the row. DependentColumn is an example, shown below. See also these other alternatives.
Figure from @mKorbel's
StatusRendererandStatusEditor, Mac OS X:
Figure from a related example, Mac OS X:
Figure from @mKorbel's
StatusRendererandStatusEditor, Windows:Figure using
DefaultTableCellRendererandDefaultCellEditor, Windows (see comments):
Code:
import java.awt.*;
import java.awt.event.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Vector;
import javax.swing.AbstractAction;
import javax.swing.AbstractCellEditor;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JSpinner;
import javax.swing.JTable;
import javax.swing.JToolBar;
import javax.swing.SpinnerDateModel;
import javax.swing.SwingUtilities;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumnModel;
public class JRadioAsRendererEditor extends JPanel {
private static final String[] COLUMN_NAMES = {
"List ID", "Expiration Date", "Status", "Date Created"};
private static final DateFormat DATE_FORMAT = new SimpleDateFormat("dd/MM/yyyy");
private static final DateFormat TIME_FORMAT_LONG = new SimpleDateFormat("HH:mm:ss,SSS");
private MyTableModel tableModel;
private JTable table;
private JFrame frame = new JFrame("TestRadioButtonRenderer");
public JRadioAsRendererEditor() {
super(new BorderLayout(0, 5));
setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
tableModel = new MyTableModel();
table = new JTable(tableModel);
table.setDefaultEditor(Date.class, new DateEditor());
table.setDefaultRenderer(Date.class, new DateRenderer());
table.setDefaultEditor(Status.class, new StatusEditor());
table.setDefaultRenderer(Status.class, new StatusRenderer());
// comment the two preceding lines and uncomment the following for a standard editor
// table.setDefaultEditor(Status.class, new DefaultCellEditor(
// new JComboBox(new Status[]{Status.Single, Status.Married, Status.Divorced})));
add(new JScrollPane(table), BorderLayout.CENTER);
JToolBar toolBar = new JToolBar();
toolBar.setFloatable(false);
toolBar.add(new AbstractAction("Add new") {
@Override
public void actionPerformed(ActionEvent e) {
tableModel.add(new TableEntry());
packTable();
}
});
toolBar.add(new AbstractAction("Remove") {
@Override
public void actionPerformed(ActionEvent e) {
tableModel.remove(table.getSelectedRow());
}
});
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new JScrollPane(table), BorderLayout.CENTER);
frame.add(toolBar, BorderLayout.NORTH);
frame.pack();
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
frame.setVisible(true);
}
});
}
private void packTable() {
TableColumnModel columnModel = table.getColumnModel();
int columnCount = table.getColumnCount();
int rowCount = table.getRowCount();
int[][] preferredHeights = new int[columnCount][rowCount];
TableCellRenderer renderer;
Component comp;
for (int col = 0; col < columnCount; col++) {
renderer = columnModel.getColumn(col).getCellRenderer();
if (renderer == null) {
renderer = table.getDefaultRenderer(tableModel.getColumnClass(col));
}
for (int row = 0; row < rowCount; row++) {
comp = renderer.getTableCellRendererComponent(table,
tableModel.getValueAt(row, col), false, false, row, col);
preferredHeights[col][row] = (int) comp.getPreferredSize().getHeight();
}
}
for (int row = 0; row < rowCount; row++) {
int pref = 0;
for (int col = 0; col < columnCount; col++) {
pref = Math.max(pref, preferredHeights[col][row]);
}
table.setRowHeight(row, pref);
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JRadioAsRendererEditor tableTestPanel = new JRadioAsRendererEditor();
}
});
}
private enum Status {
Single, Married, Divorced;
}
private class StatusPanel extends JPanel {
private JRadioButton theSingleOption;
private JRadioButton theMarriedOption;
private JRadioButton theDivorcedOption;
private ButtonGroup buttonGroup = new ButtonGroup();
StatusPanel() {
super(new GridLayout(0, 1));
setOpaque(true);
theSingleOption = createRadio(Status.Single);
theMarriedOption = createRadio(Status.Married);
theDivorcedOption = createRadio(Status.Divorced);
}
private JRadioButton createRadio(Status status) {
JRadioButton jrb = new JRadioButton(status.toString());
jrb.setOpaque(false);
add(jrb);
buttonGroup.add(jrb);
return jrb;
}
public Status getStatus() {
if (theMarriedOption.isSelected()) {
return Status.Married;
} else if (theDivorcedOption.isSelected()) {
return Status.Divorced;
} else {
return Status.Single;
}
}
public void setStatus(Status status) {
if (status == Status.Married) {
theMarriedOption.setSelected(true);
} else if (status == Status.Divorced) {
theDivorcedOption.setSelected(true);
} else {
theSingleOption.setSelected(true);
}
}
}
private class TableEntry {
private int instanceNumber;
private Long theId;
private Date theExpirationDate;
private Status theStatus;
private Date theCreationDate;
TableEntry() {
instanceNumber++;
theId = new Long(instanceNumber);
theExpirationDate = new Date();
theStatus = Status.Single;
theCreationDate = new Date();
}
TableEntry(Long anId, Date anExpirationDate, Status aStatus, Date aCreationDate) {
theId = anId;
theExpirationDate = anExpirationDate;
theStatus = aStatus;
theCreationDate = aCreationDate;
}
public Long getId() {
return theId;
}
public Date getExpirationDate() {
return theExpirationDate;
}
public Status getStatus() {
return theStatus;
}
public Date getCreationDate() {
return theCreationDate;
}
public void setId(Long anId) {
theId = anId;
}
public void setExpirationDate(Date anExpirationDate) {
theExpirationDate = anExpirationDate;
}
public void setStatus(Status aStatus) {
theStatus = aStatus;
}
public void setCreationDate(Date aCreationDate) {
theCreationDate = aCreationDate;
}
}
private class MyTableModel extends AbstractTableModel {
private Vector<Object> theEntries;
MyTableModel() {
theEntries = new Vector<Object>();
}
@SuppressWarnings("unchecked")
public void add(TableEntry anEntry) {
int index = theEntries.size();
theEntries.add(anEntry);
fireTableRowsInserted(index, index);
}
public void remove(int aRowIndex) {
if (aRowIndex < 0 || aRowIndex >= theEntries.size()) {
return;
}
theEntries.removeElementAt(aRowIndex);
fireTableRowsDeleted(aRowIndex, aRowIndex);
}
public int getRowCount() {
return theEntries.size();
}
@Override
public String getColumnName(int column) {
return COLUMN_NAMES[column];
}
@Override
public Class<?> getColumnClass(int columnIndex) {
switch (columnIndex) {
case 0:
return Long.class;
case 1:
return Date.class;
case 2:
return Status.class;
case 3:
return Date.class;
}
return Object.class;
}
@Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
TableEntry entry = (TableEntry) theEntries.elementAt(rowIndex);
switch (columnIndex) {
case 0:
try {
entry.setId(new Long(Long.parseLong(aValue.toString())));
} catch (NumberFormatException nfe) {
return;
}
break;
case 1:
entry.setExpirationDate((Date) aValue);
break;
case 2:
entry.setStatus((Status) aValue);
break;
case 3:
entry.setCreationDate((Date) aValue);
break;
default:
return;
}
fireTableCellUpdated(rowIndex, columnIndex);
}
@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
return true;
}
@Override
public int getColumnCount() {
return 4;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
TableEntry entry = (TableEntry) theEntries.elementAt(rowIndex);
switch (columnIndex) {
case 0:
return entry.getId();
case 1:
return entry.getExpirationDate();
case 2:
return entry.getStatus();
case 3:
return entry.getCreationDate();
}
return null;
}
}
private class DateRenderer extends DefaultTableCellRenderer {
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if (!(value instanceof Date)) {
return this;
}
setText(DATE_FORMAT.format((Date) value));
return this;
}
}
private class TimeRenderer extends DefaultTableCellRenderer {
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if (!(value instanceof Date)) {
return this;
}
setText(TIME_FORMAT_LONG.format((Date) value));
return this;
}
}
private class DateEditor extends AbstractCellEditor implements TableCellEditor {
private JSpinner theSpinner;
DateEditor() {
theSpinner = new JSpinner(new SpinnerDateModel());
theSpinner.setOpaque(true);
theSpinner.setEditor(new JSpinner.DateEditor(theSpinner, "dd/MM/yyyy"));
}
@Override
public Object getCellEditorValue() {
return theSpinner.getValue();
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
theSpinner.setValue(value);
if (isSelected) {
theSpinner.setBackground(table.getSelectionBackground());
} else {
theSpinner.setBackground(table.getBackground());
}
return theSpinner;
}
}
private class TimeEditor extends AbstractCellEditor implements TableCellEditor {
private JSpinner theSpinner;
private Object value;
TimeEditor() {
theSpinner = new JSpinner(new SpinnerDateModel());
theSpinner.setOpaque(true);
theSpinner.setEditor(new JSpinner.DateEditor(theSpinner, "HH:mm:ss,SSS"));
}
@Override
public Object getCellEditorValue() {
return theSpinner.getValue();
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
theSpinner.setValue(value);
if (isSelected) {
theSpinner.setBackground(table.getSelectionBackground());
} else {
theSpinner.setBackground(table.getBackground());
}
return theSpinner;
}
}
private class StatusEditor extends AbstractCellEditor implements TableCellEditor {
private StatusPanel theStatusPanel;
StatusEditor() {
theStatusPanel = new StatusPanel();
}
@Override
public Object getCellEditorValue() {
return theStatusPanel.getStatus();
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
theStatusPanel.setStatus((Status) value);
if (isSelected) {
theStatusPanel.setBackground(table.getSelectionBackground());
} else {
theStatusPanel.setBackground(table.getBackground());
}
return theStatusPanel;
}
}
private class StatusRenderer extends StatusPanel implements TableCellRenderer {
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
setStatus((Status) value);
if (isSelected) {
setBackground(table.getSelectionBackground());
} else {
setBackground(table.getBackground());
}
return this;
}
}
}
来源：https://stackoverflow.com/questions/11176480/how-to-add-jradiobutton-to-group-in-jtable