Mega Code Archive
Table header
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/*
Definitive Guide to Swing for Java 2, Second Edition
By John Zukowski
ISBN: 1-893115-78-X
Publisher: APress
*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Polygon;
import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class LabelHeaderSample {
public static void main(String args[]) {
Object rows[][] = { { "one", "ichi - \u4E00" },
{ "two", "ni - \u4E8C" }, { "three", "san - \u4E09" },
{ "four", "shi - \u56DB" }, { "five", "go - \u4E94" },
{ "six", "roku - \u516D" }, { "seven", "shichi - \u4E03" },
{ "eight", "hachi - \u516B" }, { "nine", "kyu - \u4E5D" },
{ "ten", "ju - \u5341" } };
JFrame frame = new JFrame("Label Header");
String headers[] = { "English", "Japanese" };
JTable table = new JTable(rows, headers);
JScrollPane scrollPane = new JScrollPane(table);
Icon redIcon = new DiamondIcon(Color.red);
Icon blueIcon = new DiamondIcon(Color.blue);
Border headerBorder = UIManager.getBorder("TableHeader.cellBorder");
JLabel blueLabel = new JLabel(headers[0], blueIcon, JLabel.CENTER);
blueLabel.setBorder(headerBorder);
JLabel redLabel = new JLabel(headers[1], redIcon, JLabel.CENTER);
redLabel.setBorder(headerBorder);
TableCellRenderer renderer = new JComponentTableCellRenderer();
TableColumnModel columnModel = table.getColumnModel();
TableColumn column0 = columnModel.getColumn(0);
TableColumn column1 = columnModel.getColumn(1);
column0.setHeaderRenderer(renderer);
column0.setHeaderValue(blueLabel);
column1.setHeaderRenderer(renderer);
column1.setHeaderValue(redLabel);
frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
class DiamondIcon implements Icon {
private Color color;
private boolean selected;
private int width;
private int height;
private Polygon poly;
private static final int DEFAULT_WIDTH = 10;
private static final int DEFAULT_HEIGHT = 10;
public DiamondIcon(Color color) {
this(color, true, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
public DiamondIcon(Color color, boolean selected) {
this(color, selected, DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
public DiamondIcon(Color color, boolean selected, int width, int height) {
this.color = color;
this.selected = selected;
this.width = width;
this.height = height;
initPolygon();
}
private void initPolygon() {
poly = new Polygon();
int halfWidth = width / 2;
int halfHeight = height / 2;
poly.addPoint(0, halfHeight);
poly.addPoint(halfWidth, 0);
poly.addPoint(width, halfHeight);
poly.addPoint(halfWidth, height);
}
public int getIconHeight() {
return height;
}
public int getIconWidth() {
return width;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
g.setColor(color);
g.translate(x, y);
if (selected) {
g.fillPolygon(poly);
} else {
g.drawPolygon(poly);
}
g.translate(-x, -y);
}
}
class JComponentTableCellRenderer implements TableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
return (JComponent) value;
}
}
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