kframe.java

Cubic Spline Interpolation

import java.awt.*;

/**
 *  Killable Frame
 */
public class KFrame extends Frame
{
  public static final int KILL_NEVER = 0;
  public static final int KILL_IF_ALONE = 1;
  public static final int KILL_ALWAYS = 2;

  private int killMode;
  private static int nkf = 0; /* Number of KFrames in this application */

  public KFrame( String title, int killMode )
  {
    super( title );
    this.killMode = killMode;
    nkf++;
  }

  public KFrame( String title )
  {
    this( title, KILL_IF_ALONE );
  }

  public KFrame( )
  {
    this( null );
  }


  public boolean handleEvent( Event evt )
  {
    if( evt.id == Event.WINDOW_DESTROY ) {
      hide();
      dispose();
      nkf--;
      if( ( killMode == KILL_ALWAYS ) ||
          ( ( killMode == KILL_IF_ALONE ) && ( nkf == 0 ) ) )
        System.exit(0);
      return true;
    }
    return super.handleEvent( evt );
  }

  /*
  public void invalidate()
  {
    super.invalidate();
    System.out.println( "INVALID" );
    layout();
  }
  */
}