colorchoosereditor.java

The Definitive Guide to Java Swing, Third Edition by John Zukowski (Author) 源码

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;

public class ColorChooserEditor extends AbstractCellEditor
    implements TableCellEditor {

  private JButton delegate = new JButton();

  Color savedColor;

  public ColorChooserEditor() {
    ActionListener actionListener = new ActionListener() {
      public void actionPerformed (ActionEvent actionEvent) {
        Color color = JColorChooser.showDialog(
          delegate, "Color Chooser", savedColor);
          ColorChooserEditor.this.changeColor(color);
      }
    };
    delegate.addActionListener(actionListener);
  }

  public Object getCellEditorValue() {
    return savedColor;
  }

  private void changeColor(Color color) {
    if (color != null) {
      savedColor = color;
      delegate.setIcon(new DiamondIcon(color));
    }
  }

  public Component getTableCellEditorComponent (JTable table, Object value,
      boolean isSelected, int row, int column) {
    changeColor((Color)value);
    return delegate;
  }
}