Source Code : RadioButton Table Example 2

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RadioButton Table Example 2

 
// Example from http://www.crionics.com/products/opensource/faq/swing_ex/SwingExamples.html
/* (swing1.1.1) */


import java.awt.Component;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.DefaultCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;

/**
 * @version 1.2 08/13/99
 */
public class JRadioButtonTableExample2 extends JFrame {

  public JRadioButtonTableExample2() {
    super("JRadioButtonTable Example");

    DefaultTableModel dm = new DefaultTableModel();
    dm.setDataVector(new Object[][] { { "1", new Integer(-1) },
        { "2", new Integer(-1) }, { "3", new Integer(0) },
        { "4", new Integer(1) }, { "5", new Integer(2) } },
        new Object[] { "Question", "Answer" });

    JTable table = new JTable(dm);
    String[] answer = { "A", "B", "C" };

    table.getColumn("Answer").setCellRenderer(
        new RadioButtonRenderer(answer));
    table.getColumn("Answer").setCellEditor(
        new RadioButtonEditor(new JCheckBox(), new RadioButtonPanel(
            answer)));
    JScrollPane scroll = new JScrollPane(table);
    getContentPane().add(scroll);
  }

  // Cell base
  class RadioButtonPanel extends JPanel {
    JRadioButton[] buttons;

    RadioButtonPanel(String[] str) {
      setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
      buttons = new JRadioButton[str.length];
      for (int i = 0; i < buttons.length; i++) {
        buttons[i] = new JRadioButton(str[i]);
        buttons[i].setFocusPainted(false);
        add(buttons[i]);
      }
    }

    public void setSelectedIndex(int index) {
      for (int i = 0; i < buttons.length; i++) {
        buttons[i].setSelected(i == index);
      }
    }

    public int getSelectedIndex() {
      for (int i = 0; i < buttons.length; i++) {
        if (buttons[i].isSelected()) {
          return i;
        }
      }
      return -1;
    }

    public JRadioButton[] getButtons() {
      return buttons;
    }
  }

  class RadioButtonRenderer extends RadioButtonPanel implements
      TableCellRenderer {
    RadioButtonRenderer(String[] strs) {
      super(strs);
    }

    public Component getTableCellRendererComponent(JTable table,
        Object value, boolean isSelected, boolean hasFocus, int row,
        int column) {
      if (value instanceof Integer) {
        setSelectedIndex(((Integer) value).intValue());
      }
      return this;
    }
  }

  class RadioButtonEditor extends DefaultCellEditor implements ItemListener {
    RadioButtonPanel panel;

    public RadioButtonEditor(JCheckBox checkBox, RadioButtonPanel panel) {
      super(checkBox);
      this.panel = panel;
      ButtonGroup buttonGroup = new ButtonGroup();
      JRadioButton[] buttons = panel.getButtons();
      for (int i = 0; i < buttons.length; i++) {
        buttonGroup.add(buttons[i]);
        buttons[i].addItemListener(this);
      }
    }

    public Component getTableCellEditorComponent(JTable table,
        Object value, boolean isSelected, int row, int column) {
      if (value instanceof Integer) {
        panel.setSelectedIndex(((Integer) value).intValue());
      }
      return panel;
    }

    public Object getCellEditorValue() {
      return new Integer(panel.getSelectedIndex());
    }

    public void itemStateChanged(ItemEvent e) {
      super.fireEditingStopped();
    }
  }

  public static void main(String[] args) {
    JRadioButtonTableExample2 frame = new JRadioButtonTableExample2();
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    frame.setSize(230, 140);
    frame.setVisible(true);
  }
}

           
         
  

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