import java.awt.Graphics;
import java.awt.Canvas;
import java.awt.Color;
import java.io.Serializable;

// För mainfunktionen
import java.awt.Frame;  
import java.awt.event.WindowAdapter;       
import java.awt.event.WindowEvent;       

public class flowtext_c 
  extends Canvas
  implements Serializable, Runnable
{

  public flowtext_c()
  {
    super.setSize( 60, 40);
    super.setBackground(Color.white);
    super.setForeground(Color.black);
    this.setText( "En väldigt lång sträng" );
    this.text_width = 100;
    this.setVertical_step( 10 );
    this.setTime_step( 100 );
    this.setRunning( false );
  } // flowtext_c

  public void setText( String text )
  {
    this.text = text;
  } // setFlow_text

  public String getText()
  {
    return this.text;
  } // getFlow_text

  public void setTime_step( int time_step )
  {
    this.time_step = time_step;
  } // setTime_step

  public int getTime_step()
  {
    return this.time_step;
  } // getFlow_text

  public void setVertical_step( int vertical_step )
  {
    this.xstep = vertical_step;
  } // setTime_step

  public int getVertical_step()
  {
    return this.xstep;
  } // getFlow_text

  public void setRunning( boolean run_flag )
  {
    this.keep_running = run_flag;
    if ( this.keep_running && 
         ( this.run_thread == null ) )
    {
      this.run_thread = new Thread( this );
      this.run_thread.start();
    }
    else
    {
      this.run_thread = null;
    } // if
  } // setRunning

  public boolean getRunning()
  {
    return this.keep_running;
  } // getRunning

  public void run()
  {
    while ( this.keep_running )
    {
      int width = super.getWidth();

      this.xpos = this.xpos - this.xstep;
      if ( ( this.xpos < -this.text_width ) ||
           ( this.xpos > width ) )
      {
        this.xpos = width;
      }
      super.repaint();

      try
      {
        Thread.sleep( this.time_step );
      }
      catch ( InterruptedException exc )
      {
      }
    } // while
  } // run

  public void paint( Graphics gr )
  {
    gr.drawString( this.text, this.xpos, 20 );
  } // paint


  private int xpos, xstep, time_step;
  private int text_width;
  private String text;
  private Thread run_thread;
  private boolean keep_running;


  public static void main( String args[] )
  {
    Frame frame = new Frame( "Bean test" );
    flowtext_c canvas = new flowtext_c();
    canvas.setBounds( 10, 10, 200, 200 );
    frame.add( canvas );
    frame.pack();
    frame.setResizable( false );

    frame.addWindowListener( 
      new WindowAdapter()
      {
        public void windowClosing( WindowEvent wev )
        {
          System.exit( 0 );
        } // windowClosing
      } // WindowAdapter
    );
    frame.show();

    canvas.setRunning( true );
  } // main


} // flowtext_c