我需要在JTable标头中包含多个可编辑的行，以便同一标头列可以同时包含JTextField和JButton。
我发现了如何实现可编辑的标题单元以及如何拆分标题单元。但是事实证明，这些方法有些不同，我需要将它们融合为一个。
是否已经开发了多个可编辑的JTable标头行解决方案，所以我不需要重新发明自行车了？
到目前为止，我发现了什么：
可编辑的标题行代码，取自：
http://www.java2s.com/Code/Java/Swing-Components/EditableHeaderTableExample2.htm
码：
import java.awt.Component;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.EventObject;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.event.MouseInputListener;
import javax.swing.plaf.basic.BasicTableHeaderUI;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
/**
* @version 1.0 08/22/99
*/
public class EditableHeaderTableExample2 extends JFrame {
public EditableHeaderTableExample2() {
super("EditableHeader Example");
JTable table = new JTable(7, 5);
TableColumnModel columnModel = table.getColumnModel();
table.setTableHeader(new EditableHeader(columnModel));
String[] items = { "Dog", "Cat" };
JComboBox combo = new JComboBox();
for (int i = 0; i < items.length; i++) {
combo.addItem(items[i]);
}
ComboRenderer renderer = new ComboRenderer(items);
EditableHeaderTableColumn col;
// column 1
col = (EditableHeaderTableColumn) table.getColumnModel().getColumn(1);
col.setHeaderValue(combo.getItemAt(0));
col.setHeaderRenderer(renderer);
col.setHeaderEditor(new DefaultCellEditor(combo));
// column 3
col = (EditableHeaderTableColumn) table.getColumnModel().getColumn(3);
col.setHeaderValue(combo.getItemAt(0));
//col.setHeaderRenderer(renderer);
col.setHeaderEditor(new DefaultCellEditor(combo));
JScrollPane pane = new JScrollPane(table);
getContentPane().add(pane);
}
class ComboRenderer extends JComboBox implements TableCellRenderer {
ComboRenderer(String[] items) {
for (int i = 0; i < items.length; i++) {
addItem(items[i]);
}
}
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus, int row,
int column) {
setSelectedItem(value);
return this;
}
}
public static void main(String[] args) {
EditableHeaderTableExample2 frame = new EditableHeaderTableExample2();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.setSize(300, 100);
frame.setVisible(true);
}
}
class EditableHeader extends JTableHeader implements CellEditorListener {
public final int HEADER_ROW = -10;
transient protected int editingColumn;
transient protected TableCellEditor cellEditor;
transient protected Component editorComp;
public EditableHeader(TableColumnModel columnModel) {
super(columnModel);
setReorderingAllowed(false);
cellEditor = null;
recreateTableColumn(columnModel);
}
public void updateUI() {
setUI(new EditableHeaderUI());
resizeAndRepaint();
invalidate();
}
protected void recreateTableColumn(TableColumnModel columnModel) {
int n = columnModel.getColumnCount();
EditableHeaderTableColumn[] newCols = new EditableHeaderTableColumn[n];
TableColumn[] oldCols = new TableColumn[n];
for (int i = 0; i < n; i++) {
oldCols[i] = columnModel.getColumn(i);
newCols[i] = new EditableHeaderTableColumn();
newCols[i].copyValues(oldCols[i]);
}
for (int i = 0; i < n; i++) {
columnModel.removeColumn(oldCols[i]);
}
for (int i = 0; i < n; i++) {
columnModel.addColumn(newCols[i]);
}
}
public boolean editCellAt(int index) {
return editCellAt(index);
}
public boolean editCellAt(int index, EventObject e) {
if (cellEditor != null && !cellEditor.stopCellEditing()) {
return false;
}
if (!isCellEditable(index)) {
return false;
}
TableCellEditor editor = getCellEditor(index);
if (editor != null && editor.isCellEditable(e)) {
editorComp = prepareEditor(editor, index);
editorComp.setBounds(getHeaderRect(index));
add(editorComp);
editorComp.validate();
setCellEditor(editor);
setEditingColumn(index);
editor.addCellEditorListener(this);
return true;
}
return false;
}
public boolean isCellEditable(int index) {
if (getReorderingAllowed()) {
return false;
}
int columnIndex = columnModel.getColumn(index).getModelIndex();
EditableHeaderTableColumn col = (EditableHeaderTableColumn) columnModel
.getColumn(columnIndex);
return col.isHeaderEditable();
}
public TableCellEditor getCellEditor(int index) {
int columnIndex = columnModel.getColumn(index).getModelIndex();
EditableHeaderTableColumn col = (EditableHeaderTableColumn) columnModel
.getColumn(columnIndex);
return col.getHeaderEditor();
}
public void setCellEditor(TableCellEditor newEditor) {
TableCellEditor oldEditor = cellEditor;
cellEditor = newEditor;
// firePropertyChange
if (oldEditor != null && oldEditor instanceof TableCellEditor) {
((TableCellEditor) oldEditor)
.removeCellEditorListener((CellEditorListener) this);
}
if (newEditor != null && newEditor instanceof TableCellEditor) {
((TableCellEditor) newEditor)
.addCellEditorListener((CellEditorListener) this);
}
}
public Component prepareEditor(TableCellEditor editor, int index) {
Object value = columnModel.getColumn(index).getHeaderValue();
boolean isSelected = true;
int row = HEADER_ROW;
JTable table = getTable();
Component comp = editor.getTableCellEditorComponent(table, value,
isSelected, row, index);
if (comp instanceof JComponent) {
((JComponent) comp).setNextFocusableComponent(this);
}
return comp;
}
public TableCellEditor getCellEditor() {
return cellEditor;
}
public Component getEditorComponent() {
return editorComp;
}
public void setEditingColumn(int aColumn) {
editingColumn = aColumn;
}
public int getEditingColumn() {
return editingColumn;
}
public void removeEditor() {
TableCellEditor editor = getCellEditor();
if (editor != null) {
editor.removeCellEditorListener(this);
requestFocus();
remove(editorComp);
int index = getEditingColumn();
Rectangle cellRect = getHeaderRect(index);
setCellEditor(null);
setEditingColumn(-1);
editorComp = null;
repaint(cellRect);
}
}
public boolean isEditing() {
return (cellEditor == null) ? false : true;
}
//
// CellEditorListener
//
public void editingStopped(ChangeEvent e) {
TableCellEditor editor = getCellEditor();
if (editor != null) {
Object value = editor.getCellEditorValue();
int index = getEditingColumn();
columnModel.getColumn(index).setHeaderValue(value);
removeEditor();
}
}
public void editingCanceled(ChangeEvent e) {
removeEditor();
}
//
// public void setReorderingAllowed(boolean b) {
// reorderingAllowed = false;
// }
}
class EditableHeaderUI extends BasicTableHeaderUI {
protected MouseInputListener createMouseInputListener() {
return new MouseInputHandler((EditableHeader) header);
}
public class MouseInputHandler extends BasicTableHeaderUI.MouseInputHandler {
private Component dispatchComponent;
protected EditableHeader header;
public MouseInputHandler(EditableHeader header) {
this.header = header;
}
private void setDispatchComponent(MouseEvent e) {
Component editorComponent = header.getEditorComponent();
Point p = e.getPoint();
Point p2 = SwingUtilities.convertPoint(header, p, editorComponent);
dispatchComponent = SwingUtilities.getDeepestComponentAt(
editorComponent, p2.x, p2.y);
}
private boolean repostEvent(MouseEvent e) {
if (dispatchComponent == null) {
return false;
}
MouseEvent e2 = SwingUtilities.convertMouseEvent(header, e,
dispatchComponent);
dispatchComponent.dispatchEvent(e2);
return true;
}
public void mousePressed(MouseEvent e) {
if (!SwingUtilities.isLeftMouseButton(e)) {
return;
}
super.mousePressed(e);
if (header.getResizingColumn() == null) {
Point p = e.getPoint();
TableColumnModel columnModel = header.getColumnModel();
int index = columnModel.getColumnIndexAtX(p.x);
if (index != -1) {
if (header.editCellAt(index, e)) {
setDispatchComponent(e);
repostEvent(e);
}
}
}
}
public void mouseReleased(MouseEvent e) {
super.mouseReleased(e);
if (!SwingUtilities.isLeftMouseButton(e)) {
return;
}
repostEvent(e);
dispatchComponent = null;
}
}
}
class EditableHeaderTableColumn extends TableColumn {
protected TableCellEditor headerEditor;
protected boolean isHeaderEditable;
public EditableHeaderTableColumn() {
setHeaderEditor(createDefaultHeaderEditor());
isHeaderEditable = true;
}
public void setHeaderEditor(TableCellEditor headerEditor) {
this.headerEditor = headerEditor;
}
public TableCellEditor getHeaderEditor() {
return headerEditor;
}
public void setHeaderEditable(boolean isEditable) {
isHeaderEditable = isEditable;
}
public boolean isHeaderEditable() {
return isHeaderEditable;
}
public void copyValues(TableColumn base) {
modelIndex = base.getModelIndex();
identifier = base.getIdentifier();
width = base.getWidth();
minWidth = base.getMinWidth();
setPreferredWidth(base.getPreferredWidth());
maxWidth = base.getMaxWidth();
headerRenderer = base.getHeaderRenderer();
headerValue = base.getHeaderValue();
cellRenderer = base.getCellRenderer();
cellEditor = base.getCellEditor();
isResizable = base.getResizable();
}
protected TableCellEditor createDefaultHeaderEditor() {
return new DefaultCellEditor(new JTextField());
}
}
同一JTable标头列代码中的多行（Java 7已修复）
摘自：
http://www.java2s.com/Code/Java/Swing-Components/GroupableGroupHeaderExample.htm
码：
列组类：
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
/**
* ColumnGroup
*
* @version 1.0 10/20/98
* @author Nobuo Tamemasa
*/
class ColumnGroup {
protected TableCellRenderer renderer;
protected Vector v;
protected String text;
protected int margin=0;
public ColumnGroup(String text) {
this(null,text);
}
public ColumnGroup(TableCellRenderer renderer,String text) {
if (renderer == null) {
this.renderer = new DefaultTableCellRenderer() {
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
JTableHeader header = table.getTableHeader();
if (header != null) {
setForeground(header.getForeground());
setBackground(header.getBackground());
setFont(header.getFont());
}
setHorizontalAlignment(JLabel.CENTER);
setText((value == null) ? "" : value.toString());
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
return this;
}
};
} else {
this.renderer = renderer;
}
this.text = text;
v = new Vector();
}
/**
* @param obj TableColumn or ColumnGroup
*/
public void add(Object obj) {
if (obj == null) { return; }
v.addElement(obj);
/*if(obj instanceof JTextField) {
this.setHeaderRenderer(renderer)
}*/
}
/**
* @param c TableColumn
* @param v ColumnGroups
*/
public Vector getColumnGroups(TableColumn c, Vector g) {
g.addElement(this);
if (v.contains(c)) return g;
Enumeration e = v.elements();
while (e.hasMoreElements()) {
Object obj = e.nextElement();
if (obj instanceof ColumnGroup) {
Vector groups =
(Vector)((ColumnGroup)obj).getColumnGroups(c,(Vector)g.clone());
if (groups != null) return groups;
}
}
return null;
}
public TableCellRenderer getHeaderRenderer() {
return renderer;
}
public void setHeaderRenderer(TableCellRenderer renderer) {
if (renderer != null) {
this.renderer = renderer;
}
}
public Object getHeaderValue() {
return text;
}
public Dimension getSize(JTable table) {
Component comp = renderer.getTableCellRendererComponent(
table, getHeaderValue(), false, false,-1, -1);
int height = comp.getPreferredSize().height;
int width = 0;
Enumeration e = v.elements();
while (e.hasMoreElements()) {
Object obj = e.nextElement();
if (obj instanceof TableColumn) {
TableColumn aColumn = (TableColumn)obj;
width += aColumn.getWidth();
//width += margin;
} else {
width += ((ColumnGroup)obj).getSize(table).width;
}
}
return new Dimension(width, height);
}
public void setColumnMargin(int margin) {
this.margin = margin;
Enumeration e = v.elements();
while (e.hasMoreElements()) {
Object obj = e.nextElement();
if (obj instanceof ColumnGroup) {
((ColumnGroup)obj).setColumnMargin(margin);
}
}
}
GroupableHeaderExample
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
/**
* @version 1.0 11/09/98
*/
public class GroupableHeaderExample extends JFrame {
GroupableHeaderExample() {
super( "Groupable Header Example" );
String[] petStrings = { "Bird", "Cat", "Dog", "Rabbit", "Pig" };
JComboBox petList = new JComboBox(petStrings);
DefaultTableModel dm = new DefaultTableModel();
dm.setDataVector(new Object[][]{
{"foo","ja"},
{"bar","en"}},
new Object[]{new JTextField(), petList});//"Input box","Combo Box"});
JTable table = new JTable( dm ) {
protected JTableHeader createDefaultTableHeader() {
return new GroupableTableHeader(columnModel);
}
};
TableColumnModel cm = table.getColumnModel();
ColumnGroup g_name = new ColumnGroup("Title1");
g_name.add(cm.getColumn(0));
//g_name.add(cm.getColumn(1));
ColumnGroup g_lang = new ColumnGroup("Title2");
g_lang.add(cm.getColumn(1));
/*ColumnGroup g_other = new ColumnGroup("Others");
g_other.add(cm.getColumn(4));
g_other.add(cm.getColumn(5));
g_lang.add(g_other);*/
GroupableTableHeader header = (GroupableTableHeader)table.getTableHeader();
header.addColumnGroup(g_name);
header.addColumnGroup(g_lang);
JScrollPane scroll = new JScrollPane( table );
getContentPane().add( scroll );
setSize( 400, 120 );
}
public static void main(String[] args) {
GroupableHeaderExample frame = new GroupableHeaderExample();
frame.addWindowListener( new WindowAdapter() {
public void windowClosing( WindowEvent e ) {
System.exit(0);
}
});
frame.setVisible(true);
}
}
GroupableTableHeader类
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
/**
* GroupableTableHeader
*
* @version 1.0 10/20/98
* @author Nobuo Tamemasa
*/
public class GroupableTableHeader extends JTableHeader {
private static final String uiClassID = "GroupableTableHeaderUI";
protected Vector columnGroups = null;
public GroupableTableHeader(TableColumnModel model) {
super(model);
setUI(new GroupableTableHeaderUI());
setReorderingAllowed(false);
}
public void updateUI(){
setUI(new GroupableTableHeaderUI());
}
public void setReorderingAllowed(boolean b) {
reorderingAllowed = false;
}
public void addColumnGroup(ColumnGroup g) {
if (columnGroups == null) {
columnGroups = new Vector();
}
columnGroups.addElement(g);
}
public Enumeration getColumnGroups(TableColumn col) {
if (columnGroups == null) return null;
Enumeration e = columnGroups.elements();
while (e.hasMoreElements()) {
ColumnGroup cGroup = (ColumnGroup)e.nextElement();
Vector v_ret = (Vector)cGroup.getColumnGroups(col,new Vector());
if (v_ret != null) {
return v_ret.elements();
}
}
return null;
}
public void setColumnMargin() {
if (columnGroups == null) return;
int columnMargin = getColumnModel().getColumnMargin();
Enumeration e = columnGroups.elements();
while (e.hasMoreElements()) {
ColumnGroup cGroup = (ColumnGroup)e.nextElement();
cGroup.setColumnMargin(columnMargin);
}
}
}
GroupableTableHeaderUI类
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;
import javax.swing.plaf.basic.*;
public class GroupableTableHeaderUI extends BasicTableHeaderUI {
public void paint(Graphics g, JComponent c) {
Rectangle clipBounds = g.getClipBounds();
if (header.getColumnModel() == null) return;
((GroupableTableHeader)header).setColumnMargin();
int column = 0;
Dimension size = header.getSize();
Rectangle cellRect = new Rectangle(0, 0, size.width, size.height);
Hashtable h = new Hashtable();
int columnMargin = header.getColumnModel().getColumnMargin();
Enumeration enumeration = header.getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
cellRect.height = size.height;
cellRect.y = 0;
TableColumn aColumn = (TableColumn)enumeration.nextElement();
Enumeration cGroups = ((GroupableTableHeader)header).getColumnGroups(aColumn);
if (cGroups != null) {
int groupHeight = 0;
while (cGroups.hasMoreElements()) {
ColumnGroup cGroup = (ColumnGroup)cGroups.nextElement();
Rectangle groupRect = (Rectangle)h.get(cGroup);
if (groupRect == null) {
groupRect = new Rectangle(cellRect);
Dimension d = cGroup.getSize(header.getTable());
groupRect.width = d.width;
groupRect.height = d.height;
h.put(cGroup, groupRect);
}
paintCell(g, groupRect, cGroup);
groupHeight += groupRect.height;
cellRect.height = size.height - groupHeight;
cellRect.y = groupHeight;
}
}
cellRect.width = aColumn.getWidth();// + columnMargin;
if (cellRect.intersects(clipBounds)) {
paintCell(g, cellRect, column);
}
cellRect.x += cellRect.width;
column++;
}
}
private void paintCell(Graphics g, Rectangle cellRect, int columnIndex) {
TableColumn aColumn = header.getColumnModel().getColumn(columnIndex);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
//revised by Java2s.com
renderer = new DefaultTableCellRenderer(){
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
JLabel header = new JLabel();
header.setForeground(table.getTableHeader().getForeground());
header.setBackground(table.getTableHeader().getBackground());
header.setFont(table.getTableHeader().getFont());
header.setHorizontalAlignment(JLabel.CENTER);
header.setText(value.toString());
header.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
return header;
}
};
Component c = renderer.getTableCellRendererComponent(
header.getTable(), aColumn.getHeaderValue(),false, false, -1, columnIndex);
c.setBackground(UIManager.getColor("control"));
rendererPane.add(c);
rendererPane.paintComponent(g, c, header, cellRect.x, cellRect.y,
cellRect.width, cellRect.height, true);
}
private void paintCell(Graphics g, Rectangle cellRect,ColumnGroup cGroup) {
TableCellRenderer renderer = cGroup.getHeaderRenderer();
//revised by Java2s.com
// if(renderer == null){
// return ;
// }
Component component = renderer.getTableCellRendererComponent(
header.getTable(), cGroup.getHeaderValue(),false, false, -1, -1);
rendererPane.add(component);
rendererPane.paintComponent(g, component, header, cellRect.x, cellRect.y,
cellRect.width, cellRect.height, true);
}
private int getHeaderHeight() {
int height = 0;
TableColumnModel columnModel = header.getColumnModel();
for(int column = 0; column < columnModel.getColumnCount(); column++) {
TableColumn aColumn = columnModel.getColumn(column);
TableCellRenderer renderer = aColumn.getHeaderRenderer();
//revised by Java2s.com
if(renderer == null){
return 40;
}
Component comp = renderer.getTableCellRendererComponent(
header.getTable(), aColumn.getHeaderValue(), false, false,-1, column);
int cHeight = comp.getPreferredSize().height;
Enumeration e = ((GroupableTableHeader)header).getColumnGroups(aColumn);
if (e != null) {
while (e.hasMoreElements()) {
ColumnGroup cGroup = (ColumnGroup)e.nextElement();
cHeight += cGroup.getSize(header.getTable()).height;
}
}
height = Math.max(height, cHeight);
}
return height;
}
private Dimension createHeaderSize(long width) {
TableColumnModel columnModel = header.getColumnModel();
width += columnModel.getColumnMargin() * columnModel.getColumnCount();
if (width > Integer.MAX_VALUE) {
width = Integer.MAX_VALUE;
}
return new Dimension((int)width, getHeaderHeight());
}
public Dimension getPreferredSize(JComponent c) {
long width = 0;
Enumeration enumeration = header.getColumnModel().getColumns();
while (enumeration.hasMoreElements()) {
TableColumn aColumn = (TableColumn)enumeration.nextElement();
width = width + aColumn.getPreferredWidth();
}
return createHeaderSize(width);
}
}
最佳答案
只是在JTableHeader中使用TableCellEditor的想法是错误的，也不是multi_line_header，以购买Jide（支持）
使用JTextField中的RowFilter可能更简单，
请注意不要忘记convert indexes from view coordinates to model coordinates
。
。
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
//code based on posts by @camickr
public class TableFilterRow implements TableColumnModelListener {
private static final long serialVersionUID = 1L;
private JFrame frame = new JFrame();
private JTable table = new JTable(3, 5);
private JScrollPane scrollPane = new JScrollPane(table);
// Panel for text fields
private JPanel filterRow = new JPanel(new FlowLayout(FlowLayout.CENTER, 0, 0));
public TableFilterRow() {
table.setPreferredScrollableViewportSize(table.getPreferredSize());
table.getColumnModel().addColumnModelListener(this);
filterRow = new JPanel(new FlowLayout(FlowLayout.CENTER, 0, 0));
for (int i = 0; i < table.getColumnCount(); i++) {
filterRow.add(new JTextField(" Sum at - " + i));
}
columnMarginChanged(new ChangeEvent(table.getColumnModel()));
frame.add(scrollPane);
frame.add(filterRow, BorderLayout.SOUTH);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
// Implement TableColumnModelListener methods
// (Note: instead of implementing a listener you should be able to
// override the columnMarginChanged and columMoved methods of JTable)
@Override
public void columnMarginChanged(ChangeEvent e) {
TableColumnModel tcm = table.getColumnModel();
int columns = tcm.getColumnCount();
for (int i = 0; i < columns; i++) {
JTextField textField = (JTextField) filterRow.getComponent(i);
Dimension d = textField.getPreferredSize();
d.width = tcm.getColumn(i).getWidth();
textField.setPreferredSize(d);
}
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
filterRow.revalidate();
}
});
}
@Override
public void columnMoved(TableColumnModelEvent e) {
Component moved = filterRow.getComponent(e.getFromIndex());
filterRow.remove(e.getFromIndex());
filterRow.add(moved, e.getToIndex());
filterRow.validate();
}
@Override
public void columnAdded(TableColumnModelEvent e) {
}
@Override
public void columnRemoved(TableColumnModelEvent e) {
}
@Override
public void columnSelectionChanged(ListSelectionEvent e) {
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
TableFilterRow frame = new TableFilterRow();
}
});
}
}