//Titel:            1. Labor, WiSe 2017/18

// MDI-Rahmen
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

// Packages fuer Opendialog
import java.io.File;
import javax.swing.JFileChooser;
import javax.swing.filechooser.*;




public class MyCanvas extends Canvas {
  int color;

  public MyCanvas() {
     int red = (int) (Math.random()*255);
     int green = (int) (Math.random()*255);
     int blue = (int) (Math.random()*255);
     color = (red<<16) | (green<<8) | blue;
    System.out.println(color+""+"  red: "+red+"  green: "+green+"  blue: "+blue);
  }

  public void paint (Graphics g) {
    // Ausgabe der normalen Grafik (Menues, Schalterleisten, etc. ).
//    this.paintComponents(g);
  //  super.paint(g);

    // weißer Hintergrund
    g.setColor( new Color(color));
    g.fillRect(0,0, this.getWidth(), this.getHeight());

    g.setColor( new Color(~color) );
    Graphics2D g2 = (Graphics2D) g;
         //   g2.setStroke( new BasicStroke(4.0f, 2.0f) );
    float[] dash = { 20, 10 };   //  new float[]{ 20,10 }
     // 1 = miterlimit
     // 0 =dash_phase, Verschiebung beim Start
    BasicStroke stroke = new BasicStroke( 12,  BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER,  1,  dash, 10 ); 
    g2.setStroke( stroke ); 
    g.drawLine(10,10, getWidth()-10,getHeight()-10) ;

 }  // paint

}