//package components;

/*
 * TableDemo.java requires no other files.
 */

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.awt.Dimension;
import java.awt.GridLayout;

/** 
 * TableDemo is just like SimpleTableDemo, except that it
 * uses a custom TableModel.
 */
public class TableDemo extends JPanel {
  private boolean DEBUG = false;

  public TableDemo() {
    super(new GridLayout(1,0));

    JTable table = new JTable(new MyTableModel());
    table.setPreferredScrollableViewportSize(new Dimension(500, 70));
    //table.setFillsViewportHeight(true);

    //Create the scroll pane and add the table to it.
    JScrollPane scrollPane = new JScrollPane(table);

    //Add the scroll pane to this panel.
    add(scrollPane);
  }

  class MyTableModel extends AbstractTableModel {
    private String[] columnNames = {"First Name",
				    "Last Name",
				    "Sport",
				    "# of Years",
				    "Vegetarian"};
    private Object[][] data = {
	{"Mary", "Campione",
	 "Snowboarding", new Integer(5), new Boolean(false)},
	{"Alison", "Huml",
	 "Rowing", new Integer(3), new Boolean(true)},
	{"Kathy", "Walrath",
	 "Knitting", new Integer(2), new Boolean(false)},
	{"Sharon", "Zakhour",
	 "Speed reading", new Integer(20), new Boolean(true)},
	{"Philip", "Milne",
	 "Pool", new Integer(10), new Boolean(false)},
    };

    public int getColumnCount() {
      return columnNames.length;
    }

    public int getRowCount() {
      return data.length;
    }

    public String getColumnName(int col) {
      return columnNames[col];
    }

    public Object getValueAt(int row, int col) {
      return data[row][col];
    }

    /*
     * JTable uses this method to determine the default renderer/
     * editor for each cell.  If we didn't implement this method,
     * then the last column would contain text ("true"/"false"),
     * rather than a check box.
     */
    public Class getColumnClass(int c) {
      return getValueAt(0, c).getClass();
    }

    /*
     * Don't need to implement this method unless your table's
     * editable.
     */
    public boolean isCellEditable(int row, int col) {
      //Note that the data/cell address is constant,
      //no matter where the cell appears onscreen.
      if (col < 2) {
	return false;
      } else {
	return true;
      }
    }

    /*
     * Don't need to implement this method unless your table's
     * data can change.
     */
    public void setValueAt(Object value, int row, int col) {
      if (DEBUG) {
	System.out.println("Setting value at " + row + "," + col
                                   + " to " + value
                                   + " (an instance of "
			   + value.getClass() + ")");
      }

      data[row][col] = value;
      fireTableCellUpdated(row, col);

      if (DEBUG) {
	System.out.println("New value of data:");
	printDebugData();
      }
    }

    private void printDebugData() {
      int numRows = getRowCount();
      int numCols = getColumnCount();

      for (int i=0; i < numRows; i++) {
	System.out.print("    row " + i + ":");
	for (int j=0; j < numCols; j++) {
	  System.out.print("  " + data[i][j]);
	}
	System.out.println();
      }
      System.out.println("--------------------------");
    }
  }

  /**
   * Create the GUI and show it.  For thread safety,
   * this method should be invoked from the
   * event-dispatching thread.
   */
  private static void createAndShowGUI() {
    //Create and set up the window.
    JFrame frame = new JFrame("TableDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //Create and set up the content pane.
    TableDemo newContentPane = new TableDemo();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);

    //Display the window.
    frame.pack();
    frame.setVisible(true);
  }

  public static void main(String[] args) {
    //Schedule a job for the event-dispatching thread:
    //creating and showing this application's GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
	  public void run() {
	    createAndShowGUI();
	  }
        });
  }
}