Java by API/javax.swing.table/TableCellEditor

implements TableCellEditor

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.ruponent;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.EventObject;
import java.util.Vector;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSlider;
import javax.swing.JTable;
import javax.swing.JWindow;
import javax.swing.SwingConstants;
import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
public class MainClass extends JFrame {
  public MainClass() {
    super("Customer Editor Test");
    setSize(600, 160);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    MixerModel test = new MixerModel();
    JTable jt = new JTable(test);
    jt.setDefaultRenderer(Volume.class, new VolumeRenderer());
    jt.setDefaultEditor(Volume.class, new VolumeEditor());
    JScrollPane jsp = new JScrollPane(jt);
    getContentPane().add(jsp, BorderLayout.CENTER);
  }
  public static void main(String args[]) {
    MainClass mt = new MainClass();
    mt.setVisible(true);
  }
}
class MixerModel extends AbstractTableModel {
  String headers[] = { "Track", "Start", "Stop", "Left Volume", "Right Volume" };
  Class columnClasses[] = { String.class, String.class, String.class, Volume.class, Volume.class };
  Object data[][] = { { "Bass", "0:00:000", "1:00:000", new Volume(56), new Volume(56) },
      { "Strings", "0:00:000", "0:52:010", new Volume(72), new Volume(52) },
      { "Brass", "0:08:000", "1:00:000", new Volume(99), new Volume(0) },
      { "Wind", "0:08:000", "1:00:000", new Volume(0), new Volume(99) }, };
  public int getRowCount() {
    return data.length;
  }
  public int getColumnCount() {
    return headers.length;
  }
  public Class getColumnClass(int c) {
    return columnClasses[c];
  }
  public String getColumnName(int c) {
    return headers[c];
  }
  public boolean isCellEditable(int r, int c) {
    return true;
  }
  public Object getValueAt(int r, int c) {
    return data[r][c];
  }
  public void setValueAt(Object value, int r, int c) {
    if (c >= 3) {
      ((Volume) data[r][c]).setVolume(value);
    } else {
      data[r][c] = value;
    }
  }
}
class Volume {
  private int volume;
  public Volume(int v) {
    setVolume(v);
  }
  public Volume() {
    this(50);
  }
  public void setVolume(int v) {
    volume = (v < 0 ? 0 : v > 100 ? 100 : v);
  }
  public void setVolume(Object v) {
    if (v instanceof String) {
      setVolume(Integer.parseInt((String) v));
    } else if (v instanceof Number) {
      setVolume(((Number) v).intValue());
    } else if (v instanceof Volume) {
      setVolume(((Volume) v).getVolume());
    }
  }
  public int getVolume() {
    return volume;
  }
  public String toString() {
    return String.valueOf(volume);
  }
}
class VolumeEditor extends JSlider implements TableCellEditor {
  public OkCancel helper = new OkCancel();
  protected transient Vector listeners;
  protected transient int originalValue;
  protected transient boolean editing;
  public VolumeEditor() {
    super(SwingConstants.HORIZONTAL);
    listeners = new Vector();
  }
  public class OkCancel extends JWindow {
    private JButton okB = new JButton("accept.gif");
    private JButton cancelB = new JButton("decline.gif");
    private int w = 50;
    private int h = 24;
    public OkCancel() {
      setSize(w, h);
      setBackground(Color.yellow);
      JPanel p = new JPanel(new GridLayout(0, 2));
      p.add(okB);
      p.add(cancelB);
      setContentPane(p);
      okB.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent ae) {
          stopCellEditing();
        }
      });
      cancelB.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent ae) {
          cancelCellEditing();
        }
      });
    }
  }
  public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected,
      int row, int column) {
    if (value == null) {
      return this;
    }
    if (value instanceof Volume) {
      setValue(((Volume) value).getVolume());
    } else {
      setValue(0);
    }
    table.setRowSelectionInterval(row, row);
    table.setColumnSelectionInterval(column, column);
    originalValue = getValue();
    editing = true;
    Point p = table.getLocationOnScreen();
    Rectangle r = table.getCellRect(row, column, true);
    helper.setLocation(r.x + p.x + getWidth() - 50, r.y + p.y + getHeight());
    helper.setVisible(true);
    return this;
  }
  public void cancelCellEditing() {
    fireEditingCanceled();
    editing = false;
    helper.setVisible(false);
  }
  public Object getCellEditorValue() {
    return new Integer(getValue());
  }
  public boolean isCellEditable(EventObject eo) {
    return true;
  }
  public boolean shouldSelectCell(EventObject eo) {
    return true;
  }
  public boolean stopCellEditing() {
    fireEditingStopped();
    editing = false;
    helper.setVisible(false);
    return true;
  }
  public void addCellEditorListener(CellEditorListener cel) {
    listeners.addElement(cel);
  }
  public void removeCellEditorListener(CellEditorListener cel) {
    listeners.removeElement(cel);
  }
  protected void fireEditingCanceled() {
    setValue(originalValue);
    ChangeEvent ce = new ChangeEvent(this);
    for (int i = listeners.size() - 1; i >= 0; i--) {
      ((CellEditorListener) listeners.elementAt(i)).editingCanceled(ce);
    }
  }
  protected void fireEditingStopped() {
    ChangeEvent ce = new ChangeEvent(this);
    for (int i = listeners.size() - 1; i >= 0; i--) {
      ((CellEditorListener) listeners.elementAt(i)).editingStopped(ce);
    }
  }
}
class VolumeRenderer extends JSlider implements TableCellRenderer {
  public VolumeRenderer() {
    super(SwingConstants.HORIZONTAL);
    setSize(115, 15);
  }
  public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
      boolean hasFocus, int row, int column) {
    if (value == null) {
      return this;
    }
    if (value instanceof Volume) {
      setValue(((Volume) value).getVolume());
    } else {
      setValue(0);
    }
    return this;
  }
}