MultiLine Table
/*
Core SWING Advanced Programming
By Kim Topley
ISBN: 0 13 083292 8
Publisher: Prentice Hall
*/
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class MultiLineTable {
public static void main(String[] args) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (Exception evt) {}
JFrame f = new JFrame("Multi-line Cell Table");
JTable tbl = new JTable(new MultiLineTableModel());
// Create the custom cell renderer
MultiLineCellRenderer multiLineRenderer = new MultiLineCellRenderer(
SwingConstants.LEFT, SwingConstants.CENTER);
TableColumnModel tcm = tbl.getColumnModel();
tcm.getColumn(0).setPreferredWidth(75);
tcm.getColumn(0).setMinWidth(75);
tcm.getColumn(1).setPreferredWidth(150);
tcm.getColumn(1).setMinWidth(150);
// Install the multi-line renderer
tcm.getColumn(0).setCellRenderer(multiLineRenderer);
tcm.getColumn(1).setCellRenderer(multiLineRenderer);
// Set the table row height
tbl.setRowHeight(56);
// Add the stripe renderer.
StripedTableCellRenderer.installInTable(tbl, Color.lightGray,
Color.white, null, null);
tbl.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tbl.setPreferredScrollableViewportSize(tbl.getPreferredSize());
JScrollPane sp = new JScrollPane(tbl);
f.getContentPane().add(sp, "Center");
f.pack();
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent evt) {
System.exit(0);
}
});
f.setVisible(true);
}
}
class MultiLineTableModel extends AbstractTableModel {
protected String[] columnNames = { "Flight", "Crew" };
// Implementation of TableModel interface
public int getRowCount() {
return data.length;
}
public int getColumnCount() {
return 2;
}
public Object getValueAt(int row, int column) {
return data[row][column];
}
public Class getColumnClass(int column) {
return (data[0][column]).getClass();
}
public String getColumnName(int column) {
return columnNames[column];
}
protected Object[][] data = new Object[][] {
{
"Apollo 11",
new String[] { "Neil Armstrong", "Buzz Aldrin",
"Michael Collins" } },
{
"Apollo 12",
new String[] { "Pete Conrad", "Alan Bean", "Richard Gordon" } },
{
"Apollo 13",
new String[] { "James Lovell", "Fred Haise", "Jack Swigert" } },
{
"Apollo 14",
new String[] { "Alan Shepard", "Edgar Mitchell",
"Stuart Roosa" } },
{ "Apollo 15",
new String[] { "Dave Scott", "Jim Irwin", "Al Worden" } },
{
"Apollo 16",
new String[] { "John Young", "Charlie Duke",
"Ken Mattingly" } },
{
"Apollo 17",
new String[] { "Eugene Cernan", "Harrison Schmitt",
"Ron Evans" } } };
}
class MultiLineCellRenderer extends JPanel implements TableCellRenderer {
public MultiLineCellRenderer(int horizontalAlignment, int verticalAlignment) {
this.horizontalAlignment = horizontalAlignment;
this.verticalAlignment = verticalAlignment;
switch (horizontalAlignment) {
case SwingConstants.LEFT:
alignmentX = (float) 0.0;
break;
case SwingConstants.CENTER:
alignmentX = (float) 0.5;
break;
case SwingConstants.RIGHT:
alignmentX = (float) 1.0;
break;
default:
throw new IllegalArgumentException(
"Illegal horizontal alignment value");
}
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
setOpaque(true);
setBorder(border);
background = null;
foreground = null;
}
public void setForeground(Color foreground) {
super.setForeground(foreground);
Component[] comps = this.getComponents();
int ncomp = comps.length;
for (int i = 0; i < ncomp; i++) {
Component comp = comps[i];
if (comp instanceof JLabel) {
comp.setForeground(foreground);
}
}
}
public void setBackground(Color background) {
this.background = background;
super.setBackground(background);
}
public void setFont(Font font) {
this.font = font;
}
// Implementation of TableCellRenderer interface
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
removeAll();
invalidate();
if (value == null || table == null) {
// Do nothing if no value
return this;
}
Color cellForeground;
Color cellBackground;
// Set the foreground and background colors
// from the table if they are not set
cellForeground = (foreground == null ? table.getForeground()
: foreground);
cellBackground = (background == null ? table.getBackground()
: background);
// Handle selection and focus colors
if (isSelected == true) {
cellForeground = table.getSelectionForeground();
cellBackground = table.getSelectionBackground();
}
if (hasFocus == true) {
setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
if (table.isCellEditable(row, column)) {
cellForeground = UIManager
.getColor("Table.focusCellForeground");
cellBackground = UIManager
.getColor("Table.focusCellBackground");
}
} else {
setBorder(border);
}
super.setForeground(cellForeground);
super.setBackground(cellBackground);
// Default the font from the table
if (font == null) {
font = table.getFont();
}
if (verticalAlignment != SwingConstants.TOP) {
add(Box.createVerticalGlue());
}
Object[] values;
int length;
if (value instanceof Object[]) {
// Input is an array - use it
values = (Object[]) value;
} else {
// Not an array - turn it into one
values = new Object[1];
values[0] = value;
}
length = values.length;
// Configure each row of the cell using
// a separate JLabel. If a given row is
// a JComponent, add it directly..
for (int i = 0; i < length; i++) {
Object thisRow = values[i];
if (thisRow instanceof JComponent) {
add((JComponent) thisRow);
} else {
JLabel l = new JLabel();
setValue(l, thisRow, i, cellForeground);
add(l);
}
}
if (verticalAlignment != SwingConstants.BOTTOM) {
add(Box.createVerticalGlue());
}
return this;
}
// Configures a label for one line of the cell.
// This can be overridden by derived classes
protected void setValue(JLabel l, Object value, int lineNumber,
Color cellForeground) {
if (value != null && value instanceof Icon) {
l.setIcon((Icon) value);
} else {
l.setText(value == null ? "" : value.toString());
}
l.setHorizontalAlignment(horizontalAlignment);
l.setAlignmentX(alignmentX);
l.setOpaque(false);
l.setForeground(cellForeground);
l.setFont(font);
}
protected int verticalAlignment;
protected int horizontalAlignment;
protected float alignmentX;
// These attributes may be explicitly set
// They are defaulted to the colors and attributes
// of the table
protected Color foreground;
protected Color background;
protected Font font;
protected static Border border = new EmptyBorder(1, 2, 1, 2);
}
class StripedTableCellRenderer implements TableCellRenderer {
public StripedTableCellRenderer(TableCellRenderer targetRenderer,
Color evenBack, Color evenFore, Color oddBack, Color oddFore) {
this.targetRenderer = targetRenderer;
this.evenBack = evenBack;
this.evenFore = evenFore;
this.oddBack = oddBack;
this.oddFore = oddFore;
}
// Implementation of TableCellRenderer interface
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
TableCellRenderer renderer = targetRenderer;
if (renderer == null) {
// Get default renderer from the table
renderer = table.getDefaultRenderer(table.getColumnClass(column));
}
// Let the real renderer create the component
Component comp = renderer.getTableCellRendererComponent(table, value,
isSelected, hasFocus, row, column);
// Now apply the stripe effect
if (isSelected == false && hasFocus == false) {
if ((row & 1) == 0) {
comp.setBackground(evenBack != null ? evenBack : table
.getBackground());
comp.setForeground(evenFore != null ? evenFore : table
.getForeground());
} else {
comp.setBackground(oddBack != null ? oddBack : table
.getBackground());
comp.setForeground(oddFore != null ? oddFore : table
.getForeground());
}
}
return comp;
}
// Convenience method to apply this renderer to single column
public static void installInColumn(JTable table, int columnIndex,
Color evenBack, Color evenFore, Color oddBack, Color oddFore) {
TableColumn tc = table.getColumnModel().getColumn(columnIndex);
// Get the cell renderer for this column, if any
TableCellRenderer targetRenderer = tc.getCellRenderer();
// Create a new StripedTableCellRenderer and install it
tc.setCellRenderer(new StripedTableCellRenderer(targetRenderer,
evenBack, evenFore, oddBack, oddFore));
}
// Convenience method to apply this renderer to an entire table
public static void installInTable(JTable table, Color evenBack,
Color evenFore, Color oddBack, Color oddFore) {
StripedTableCellRenderer sharedInstance = null;
int columns = table.getColumnCount();
for (int i = 0; i < columns; i++) {
TableColumn tc = table.getColumnModel().getColumn(i);
TableCellRenderer targetRenderer = tc.getCellRenderer();
if (targetRenderer != null) {
// This column has a specific renderer
tc.setCellRenderer(new StripedTableCellRenderer(targetRenderer,
evenBack, evenFore, oddBack, oddFore));
} else {
// This column uses a class renderer - use a shared renderer
if (sharedInstance == null) {
sharedInstance = new StripedTableCellRenderer(null,
evenBack, evenFore, oddBack, oddFore);
}
tc.setCellRenderer(sharedInstance);
}
}
}
protected TableCellRenderer targetRenderer;
protected Color evenBack;
protected Color evenFore;
protected Color oddBack;
protected Color oddFore;
}
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