Aufgabe9_GrafikMVC/src/mvcgrafik/view/GrafikView.java

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package mvcgrafik.view;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.geom.Rectangle2D;
import java.awt.geom.Line2D;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.standard.DialogTypeSelection;
import javax.swing.JComponent;
import javax.swing.JOptionPane;
import mvcgrafik.model.GrafikModel;
import mvcgrafik.util.OhmLogger;


/**
 *
 * @author le
 */
public class GrafikView extends JComponent implements Printable
{
  private static Logger lg = OhmLogger.getLogger();
  private static Dimension EINS = new Dimension(1, 1); // Dimension ist eine Klasse die width udn height hält
  private Rectangle2D.Float pixel;
  private Line2D.Float line;
  private GrafikModel model;
  
  public GrafikView()
  {
    pixel = new Rectangle2D.Float();
    line = new Line2D.Float();
  }

  public void setModel(GrafikModel model)
  {
    this.model = model;
  }
  
  

  /**
   * Zeichnet den aktuellen Pfad (solange die maus gedrückt gehalten wird)
   * @param p -> Der aktuelle punkt als x-y-Koordinate
   */
  public void drawPoint(Point p)
  {
    Graphics2D g2 = (Graphics2D)this.getGraphics(); // gefährlich!

    drawPath(model.getPunkte(),g2);

    g2.dispose();  //SEEEEHHHHRRRR WICHTIG!!!!!!!
  }
  
  
  /**
   * Hier werden alle Pfade aus dem model neu gezeichnet
   * Jedes mal wenn die Maus los gelassen wird, wird dder aktuelle Pfad gespeichert
   * @param g 
   */
  public void paintComponent(Graphics g)
  {
    if (model == null) return;
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D)g;
    
    
    model.getFiguren().forEach(figuren->
    {
        drawPath(figuren,g2);
    });
 
  }
  
  public void drawPath(List<Point> path, Graphics2D g2){     
    
    for(int i=0; i < path.size()-1; i++)
    {
        Point from = path.get(i);
        Point to = path.get(i+1);
        
        line.setLine(from,to);
        g2.draw(line);
    }
  }
  
  public void doPrint()
  {
    HashPrintRequestAttributeSet printSet =
     new HashPrintRequestAttributeSet();
    printSet.add(DialogTypeSelection.NATIVE);
    PrinterJob pj = PrinterJob.getPrinterJob();
    pj.setPrintable(this);
    //Dialog
    if (pj.printDialog(printSet))
    {
      try
      {
        pj.print(printSet);
      }
      catch (Exception ex)
      {
        JOptionPane.showMessageDialog(this, ex.toString());
      }
    }
  }

  @Override
  public int print(Graphics gp, PageFormat pf, int pageIndex) throws PrinterException
  {
    Graphics2D g2p = (Graphics2D)gp;
    if (pageIndex == 0)
    {
      g2p.translate(pf.getImageableX(), pf.getImageableY());
      g2p.scale(pf.getImageableWidth() / this.getWidth(),
                pf.getImageableHeight() / this.getHeight());
      super.print(g2p);
      return Printable.PAGE_EXISTS;
    }
    else
    {
      return Printable.NO_SUCH_PAGE; // wichtig sonst Papiervernichtung
    }
  }
}