/*
*Ce fichier a ete telecharge depuis
*http://www.codes-sources.com/code.aspx?ID=31743
*Retrouvez d'autres CodeS-SourceS sur http://www.codes-sources.com/
*/

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagLayout;
import java.awt.RenderingHints;
import java.awt.print.PageFormat;
import java.awt.print.Paper;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.util.Vector;

import javax.swing.JPanel;

public class PanelPrinter implements Printable {

    public PanelPrinter(JPanel panel)
    {
        documentTitle = "";
        this.panel = panel;
        initPrintablePanel();
    }

    public void initPrintablePanel()
    {
        showPrintZone = false;
        fitIntoPage = false;
        wrapComponent = false;
        printJob = PrinterJob.getPrinterJob();
        pageFormat = printJob.defaultPage();
        pageFormat.setOrientation(1);
    }

    public void setOrientation(int orientation)
    {
        pageFormat.setOrientation(orientation);
    }

    public void setPrintZoneVisible(boolean status)
    {
        showPrintZone = status;
    }

    public void setWrapComponent(boolean status)
    {
        wrapComponent = status;
    }

    public void setFitIntoPage(boolean status)
    {
        fitIntoPage = status;
    }

    public int getPageWidth()
    {
        return (int)pageFormat.getImageableWidth();
    }

    public double getMarginTop ()
    {
        return pageFormat.getImageableY();
    }

    public double getMarginLeft ()
    {
        return pageFormat.getImageableX();
    }
    
    public void setLRMargins(int margin)
    {
        Paper paper = pageFormat.getPaper();
        paper.setImageableArea(paper.getImageableX() - (double)(margin / 2), paper.getImageableY(), paper.getImageableWidth() + (double)(margin / 2), paper.getImageableHeight());
        pageFormat.setPaper(paper);
    }
    
    public void setTBMargins(int margin)
    {
        Paper paper = pageFormat.getPaper();
        paper.setImageableArea(paper.getImageableX(), paper.getImageableY() - (double)(margin / 2), paper.getImageableWidth(), paper.getImageableHeight() + (double)(margin / 2));
        pageFormat.setPaper(paper);
    }

    public void setDocumentTitle(String title)
    {
        documentTitle = title;
    }

    public int print(Graphics g, PageFormat pf, int pageIndex)
        throws PrinterException
    {
        Dimension tailleDoc = panel.getSize();
        double hauteurDocu = tailleDoc.getHeight();
        double hauteurPage = pf.getImageableHeight();
        double largeurDocu = tailleDoc.getWidth();
        double largeurPage = pf.getImageableWidth();
        int totalNumPages = (int)Math.ceil(hauteurDocu / hauteurPage);
        if(wrapComponent)
            totalNumPages = taillePages.size();
        else
        if(fitIntoPage)
            totalNumPages = 1;
        double scaleX = largeurPage / largeurDocu;
        double scaleY = hauteurPage / hauteurDocu;
        if(pageIndex >= totalNumPages)
            return 1;
        Graphics2D g2d = (Graphics2D)g;
        g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        g2d.translate(pf.getImageableX(), pf.getImageableY());
        if(fitIntoPage)
        {
            double ratio = Math.min(scaleX, scaleY);
            g2d.scale(ratio, ratio);
        } else
        if(wrapComponent)
        {
            if(pageIndex > 0)
                g2d.translate(0.0D, -((Double)taillePages.get(pageIndex - 1)).doubleValue());
        } else
        {
            g2d.translate(0.0D, (double)(-pageIndex) * hauteurPage);
        }
        panel.paint(g2d);
        if(wrapComponent)
        {
            double hauteurBlanc = ((Double)taillePages.get(pageIndex)).doubleValue();
            g2d.setColor(Color.WHITE);
            g2d.fillRect(0, (int)hauteurBlanc, (int)largeurPage, (int)hauteurBlanc + (int)hauteurPage);
        }
        if(wrapComponent)
        {
            if(pageIndex > 0)
                g2d.translate(0.0D, ((Double)taillePages.get(pageIndex - 1)).doubleValue());
        } else
        {
            g2d.translate(0.0D, (double)pageIndex * hauteurPage);
        }
        g2d.setColor(Color.BLACK);
        g2d.setFont(new Font("Verdanna", 2, 10));
        //g2d.drawString(documentTitle + " - [" + (pageIndex + 1) + "/" + totalNumPages + "]", 0, (int)pf.getImageableHeight() - 20);
        return 0;
    }

    public void print()
    {
        printJob.setPrintable(this, pageFormat);
        try
        {
            if(printJob.printDialog())
            {
                if(wrapComponent) calculatePages();
                Paper paper = pageFormat.getPaper();
                Paper save = pageFormat.getPaper();
                paper.setImageableArea(paper.getImageableX(), paper.getImageableY(), paper.getWidth() - paper.getImageableX(), paper.getHeight() - paper.getImageableY());
                pageFormat.setPaper(paper);
                printJob.setPrintable(this, pageFormat);
                printJob.print();
                pageFormat.setPaper(save);
            }
        }
        catch(PrinterException pe)
        {
            System.out.println("Erreur lors de l'impression du document: " + toString());
        }
    }

    private void calculatePages()
    {
        taillePages = new Vector();
        double hauteurPage = pageFormat.getImageableHeight();
        double hauteurTotal = 0.0D;
        double hauteurCumul = 0.0D;
        for(int i = 0; i < panel.getComponentCount(); i++)
        {
            int gridBagInsets = 0;
            if(panel.getLayout() instanceof GridBagLayout)
                gridBagInsets = ((GridBagLayout)panel.getLayout()).getConstraints(panel.getComponent(i)).insets.bottom + ((GridBagLayout)panel.getLayout()).getConstraints(panel.getComponent(i)).insets.top;
            double hauteurComponent = panel.getComponent(i).getSize().getHeight() + (double)gridBagInsets;
            if(hauteurComponent > hauteurPage)
            {
                wrapComponent = false;
                return;
            }
            hauteurTotal += hauteurComponent;
            if(hauteurTotal > hauteurPage)
            {
                hauteurTotal -= hauteurComponent;
                hauteurCumul += hauteurTotal;
                taillePages.add(new Double(hauteurCumul));
                hauteurTotal = hauteurComponent;
            }
        }

        hauteurCumul += hauteurTotal;
        taillePages.add(new Double(hauteurCumul));
    }

    private JPanel panel;
    private boolean showPrintZone;
    private boolean fitIntoPage;
    private boolean wrapComponent;
    private PageFormat pageFormat;
    private PrinterJob printJob;
    private Vector taillePages;
    private String documentTitle;
    public static final int PORTRAIT = 1;
    public static final int LANDSCAPE = 0;
}