Pushable Table Header Example : Grid Table « Swing Components « Java
Pushable Table Header Example
// Example from http://www.crionics.com/products/opensource/faq/swing_ex/SwingExamples.html
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Insets;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumnModel;
/**
* @version 1.0 02/25/99
*/
public class PushableHeaderExample extends JPanel {
public PushableHeaderExample() {
setLayout(new BorderLayout());
String[] headerStr = { "Push", "me", "here" };
DefaultTableModel dm = new DefaultTableModel(headerStr, 4);
JTable table = new JTable(dm);
ButtonHeaderRenderer renderer = new ButtonHeaderRenderer();
TableColumnModel model = table.getColumnModel();
int n = headerStr.length;
for (int i = 0; i < n; i++) {
model.getColumn(i).setHeaderRenderer(renderer);
}
JTableHeader header = table.getTableHeader();
header.addMouseListener(new HeaderListener(header, renderer));
JScrollPane pane = new JScrollPane(table);
add(pane, BorderLayout.CENTER);
}
public static void main(String[] args) {
JFrame f = new JFrame("PushableHeaderTable Example");
f.getContentPane()
.add(new PushableHeaderExample(), BorderLayout.CENTER);
f.setSize(400, 100);
f.setVisible(true);
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
class HeaderListener extends MouseAdapter {
JTableHeader header;
ButtonHeaderRenderer renderer;
HeaderListener(JTableHeader header, ButtonHeaderRenderer renderer) {
this.header = header;
this.renderer = renderer;
}
public void mousePressed(MouseEvent e) {
int col = header.columnAtPoint(e.getPoint());
renderer.setPressedColumn(col);
header.repaint();
System.out.println("Ouch! " + col);
}
public void mouseReleased(MouseEvent e) {
int col = header.columnAtPoint(e.getPoint());
renderer.setPressedColumn(-1); // clear
header.repaint();
}
}
class ButtonHeaderRenderer extends JButton implements TableCellRenderer {
int pushedColumn;
public ButtonHeaderRenderer() {
pushedColumn = -1;
setMargin(new Insets(0, 0, 0, 0));
}
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus, int row,
int column) {
setText((value == null) ? "" : value.toString());
boolean isPressed = (column == pushedColumn);
getModel().setPressed(isPressed);
getModel().setArmed(isPressed);
return this;
}
public void setPressedColumn(int col) {
pushedColumn = col;
}
}
}
