extends JSlider implements TableCellRenderer : TableCellRenderer « javax.swing.table « Java by API

1. Java by API
2. javax.swing.table
3. TableCellRenderer

extends JSlider implements TableCellRenderer

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
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());
    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 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;
  }
}

           
       

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