// (C) Copyright Jack Culpepper 1997
// This code may not be distributed without permission.
package mandel;

import java.awt.*;
import mandel.MandelTask;

public class MandelFrame extends Frame {
  protected byte[][] data;
  // for some reason, ( 0, 0 ) in the graphics object coordinate system is
  // masked by the window manager's frame widget.  this number represents the
  // verticle thickness of the widget, so that we may size our window larger
  // by an appropriate amount, and begin our draw a little further down than
  // we otherwise would.  (it's possible that this number may vary from
  // window manager to window manager)
  protected static final int window_widget_height = 25;
  protected Graphics offscreenG;
  protected Image offscreenI;

  public MandelFrame( String name, byte[][] data ) {
    super( name );

    this.data = data;
    this.setSize( data.length, data[0].length + window_widget_height );
    this.show();
  }

  public void update( Graphics g ) {
    paint( g );
  }

  public void paint( Graphics g ) {
    if ( offscreenI != null ) {
      g.drawImage( offscreenI, 0, 0, this );
    }
  }

  public void drawPoint( int x, int y, Graphics g ) {
    byte i = data[ x ][ y ];
    if ( i < 0 || i > 100 ) i = 100;
    Color color = new Color( ( float ) ( ( float )i / 100.0 ), 0, 0 );
    g.setColor( color );
    g.drawLine( x, y + window_widget_height, x, y + window_widget_height );
  }

  public void input( MandelTask t ) {
    if ( offscreenI == null ) {
      offscreenI = createImage( data.length, data[0].length +
        window_widget_height );
    }
    if ( offscreenI == null ) System.out.println( "Null!!!!!" );
    else {
      for ( int i = 0 ; i < t.res.x ; i++ ) {
        for ( int j = 0 ; j < t.res.y ; j++ ) {
          drawPoint( i + t.loc.x, j + t.loc.y, offscreenI.getGraphics() );
        }
      }
    }
    paint( this.getGraphics() );
  }
}