casepageevent.java

一个数据挖掘软件ALPHAMINERR的整个过程的JAVA版源代码

/*
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 * Created on 2006/8/31
 *
 * @Author: Xiaojun Chen
 * $Revision$ 1.0
 *
 */

package eti.bi.alphaminer.tools.ExportCase;
import java.awt.Color;
import java.io.IOException;
import com.lowagie.text.Chunk;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.Font;
import com.lowagie.text.Image;
import com.lowagie.text.Document;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Phrase;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfDestination;
import com.lowagie.text.pdf.PdfGState;
import com.lowagie.text.pdf.PdfOutline;
import com.lowagie.text.pdf.PdfPTable;
import com.lowagie.text.pdf.PdfPageEvent;
import com.lowagie.text.pdf.PdfTemplate;
import com.lowagie.text.pdf.PdfWriter;
import eti.bi.common.ImageLocation;
import eti.bi.common.System.SysConfig;
import eti.bi.util.ResourceLoader;

class CasePageEvent implements PdfPageEvent {
	/** The headertable. */
	public PdfPTable table;
	/** The Graphic state */
	public PdfGState gstate;
	/** A template that will hold the total number of pages. */
	public PdfTemplate tpl;
	/** Alphaminer logo */
	private Image alphaminerLogo;
	private BaseFont bf;
	private String alphaminerText;
	private float text_markx;
	private float text_marky;
	private float headtabley;
	private float logoheight=30;
	private float pageoutwidth=20;
	
	public CasePageEvent() throws DocumentException, IOException {
		alphaminerText = "AlphaMiner(Version " + SysConfig.getAlphaminerVersion() + ")";
		// bottomText = "Powered by HIT-HKU BI Lab(2006).";
		alphaminerLogo = Image.getInstance(ResourceLoader.getImagePath(ImageLocation.APP_ICON));
		alphaminerLogo.scaleAbsolute(logoheight, logoheight);
		bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
	}

	public void onOpenDocument(PdfWriter writer, Document document) {
		try {	
			table = new PdfPTable(2);
			Phrase p = new Phrase();
			Chunk ck = new Chunk("http://bi.hitsz.edu.cn/AlphaMiner/index.htm\n", new Font(Font.TIMES_ROMAN, 13,
					Font.BOLDITALIC, Color.blue));
			ck.setAnchor("http://bi.hitsz.edu.cn/AlphaMiner/index.htm");
			p.add(ck);
			ck = new Chunk("HIT-HKU Business Intelligence Lab", new Font(Font.TIMES_ROMAN, 12, Font.BOLD, Color.BLUE));
			ck.setAnchor("http://bi.hitsz.edu.cn");
			p.add(ck);
			table.getDefaultCell().setBackgroundColor(Color.yellow);
			table.getDefaultCell().setBorderWidth(0);
			table.addCell(p);
			table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);
			table.addCell(new Phrase(new Chunk(alphaminerLogo, 0, 0)));
			// initialization of the Graphic State
			gstate = new PdfGState();
			gstate.setFillOpacity(0.2f);
			gstate.setStrokeOpacity(0.1f);
			// initialization of the template
			tpl = writer.getDirectContent().createTemplate(100, 100);
			tpl.setBoundingBox(new Rectangle(-20, -20, 100, 100));
			Rectangle page = writer.getPageSize();
			text_markx = page.width() - document.rightMargin() - bf.getWidthPoint("Xiaojun Chen", 20)/2-10;
			text_marky = document.bottomMargin() + 30;
			
			headtabley = page.height()+logoheight-document.topMargin();
			if(headtabley<pageoutwidth) {
				headtabley = pageoutwidth;
			}
				
		} catch (Exception e) {
			throw new ExceptionConverter(e);
		}
	}

	public void onStartPage(PdfWriter writer, Document document) {
		
	}

	public void onEndPage(PdfWriter writer, Document document) {
		if (document.getPageNumber() <3) {
			return;
		}
		try {
			PdfContentByte cb = writer.getDirectContent();
			cb.saveState();
			// write the headertable
			table.setTotalWidth(document.right() - document.left());
			table.writeSelectedRows(0, -1, document.left(), headtabley, cb);
			//draw line
			/*
			cb.setColorStroke(Color.RED);
			cb.setLineWidth(2);
			cb.moveTo(documentleft, lineheight);
			cb.lineTo(focumentright, lineheight);
			cb.stroke();
			cb.saveState();
			*/
			// compose the footer
			String text = "Page " + (writer.getPageNumber() - 2) + " of ";
			float textSize = bf.getWidthPoint(text, 12);
			float textBase = document.bottom() - 20;
			cb.beginText();
			cb.setFontAndSize(bf, 12);
			// show the footer at the left
			float adjust = bf.getWidthPoint("0", 12);
			cb.setTextMatrix(document.right() - textSize - adjust, textBase);
			cb.showText(text);
			cb.endText();
			cb.addTemplate(tpl, document.right() - adjust, textBase);
			cb.saveState();
			// draw a Rectangle around the page
			cb.setColorStroke(Color.orange);
			cb.setLineWidth(2);
			cb.rectangle(pageoutwidth, pageoutwidth, document.getPageSize().width() - 2*pageoutwidth, document.getPageSize().height() - 2*pageoutwidth);
			cb.stroke();
			cb.restoreState();
			// starting on page 3, a watermark with an Image that is made
			// transparent
			if (writer.getPageNumber() >= 5) {
				cb.setGState(gstate);
				cb.setColorFill(Color.red);
				cb.beginText();
				cb.setFontAndSize(bf, 50);
				if (writer.getPageNumber() % 2 == 1) {
					cb.showTextAligned(Element.ALIGN_CENTER, alphaminerText, document.getPageSize().width() / 2,
							document.getPageSize().height() / 2, 45);
				} else {
					cb.showTextAligned(Element.ALIGN_CENTER, alphaminerText, document.getPageSize().width() / 2,
							document.getPageSize().height() / 2, -45);
				}
				cb.setFontAndSize(bf, 20);
				try {
					cb.showTextAligned(Element.ALIGN_CENTER, "Xiaojun Chen", text_markx, text_marky, 0);
				} catch (Exception e) {
					throw new ExceptionConverter(e);
				}
				cb.endText();
				cb.restoreState();
			}
		} catch (Exception e) {
			throw new ExceptionConverter(e);
		}
	}

	public void onCloseDocument(PdfWriter writer, Document arg1) {
		tpl.beginText();
		tpl.setFontAndSize(bf, 12);
		tpl.setTextMatrix(0, 0);
		tpl.showText("" + (writer.getPageNumber() - 3));
		tpl.endText();
	}

	public void onParagraph(PdfWriter writer, Document document, float position) {
		String bookMarkTitle = CaseDocument.BookMark();
		if (bookMarkTitle == null) {
			return;
		}
		PdfContentByte cb = writer.getDirectContent();
		PdfDestination destination = new PdfDestination(PdfDestination.FITH, position);
		
		PdfOutline outline = new PdfOutline(cb.getRootOutline(), destination, bookMarkTitle);
		outline.setColor(Color.blue);
	}

	public void onParagraphEnd(PdfWriter arg0, Document arg1, float arg2) {
		// TODO Auto-generated method stub
	}

	public void onChapter(PdfWriter arg0, Document arg1, float arg2, Paragraph arg3) {
		// TODO Auto-generated method stub
	}

	public void onChapterEnd(PdfWriter arg0, Document arg1, float arg2) {
		// TODO Auto-generated method stub
	}

	public void onSection(PdfWriter arg0, Document arg1, float arg2, int arg3, Paragraph arg4) {
		// TODO Auto-generated method stub
	}

	public void onSectionEnd(PdfWriter arg0, Document arg1, float arg2) {
		// TODO Auto-generated method stub
	}

	public void onGenericTag(PdfWriter arg0, Document arg1, Rectangle arg2, String arg3) {
		// TODO Auto-generated method stub
	}
}