Java Code Examples for com.lowagie.text.pdf.PdfContentByte#saveState()

/**
 * Overrides the method in PdfPageEventHelper from itext to compose the footer and show the
 * footer.
 *
 * @param writer    The PdfWriter for this document.
 * @param document  The document.
 * @see com.lowagie.text.pdf.PdfPageEventHelper#onEndPage(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
 */
public void onEndPage(PdfWriter writer, Document document) {
    LOG.debug("onEndPage() started.");
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    // compose the footer
    String text = "Page " + writer.getPageNumber() + " of ";
    float textSize = helv.getWidthPoint(text, 12);
    float textBase = document.bottom() - 20;
    cb.beginText();
    cb.setFontAndSize(helv, 12);
    // show the footer
    float adjust = helv.getWidthPoint("0", 12);
    cb.setTextMatrix(document.right() - textSize - adjust, textBase);
    cb.showText(text);
    cb.endText();
    cb.addTemplate(tpl, document.right() - adjust, textBase);
    cb.saveState();
}
 

/**
 * Overrides the method in PdfPageEventHelper from itext to write the headerTable, compose the footer and show the
 * footer.
 *
 * @param writer    The PdfWriter for this document.
 * @param document  The document.
 * @see com.lowagie.text.pdf.PdfPageEventHelper#onEndPage(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
 */
@Override
public void onEndPage(PdfWriter writer, Document document) {
    LOG.debug("onEndPage() started.");
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    // write the headerTable
    headerTable.setTotalWidth(document.right() - document.left());
    headerTable.writeSelectedRows(0, -1, document.left(), document.getPageSize().height() - 10, cb);
    // compose the footer
    String text = "Page " + writer.getPageNumber() + " of ";
    float textSize = helv.getWidthPoint(text, 12);
    float textBase = document.bottom() - 20;
    cb.beginText();
    cb.setFontAndSize(helv, 12);
    // show the footer
    float adjust = helv.getWidthPoint("0", 12);
    cb.setTextMatrix(document.right() - textSize - adjust, textBase);
    cb.showText(text);
    cb.endText();
    cb.addTemplate(tpl, document.right() - adjust, textBase);
    cb.saveState();
}
 

/**
 * Constructor for PDFGraphics2D.
 */
public PdfGraphics2D( final PdfContentByte cb, final float width, final float height,
    final PdfOutputProcessorMetaData metaData ) {
  this.metaData = metaData;
  dg2.setRenderingHint( RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON );
  setRenderingHint( RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON );

  this.transform = new AffineTransform();

  paint = Color.black;
  background = Color.white;
  setFont( new Font( "sanserif", Font.PLAIN, 12 ) );
  this.cb = cb;
  cb.saveState();
  this.width = width;
  this.height = height;
  clip = new Area( new Rectangle2D.Float( 0, 0, width, height ) );
  clip( clip );
  oldStroke = strokeOne;
  stroke = strokeOne;
  originalStroke = strokeOne;
  setStrokeDiff( stroke, null );
  cb.saveState();
}
 

/**
 * @see com.lowagie.text.pdf.draw.DrawInterface#draw(com.lowagie.text.pdf.PdfContentByte, float, float, float, float, float)
 */
public void draw(PdfContentByte canvas, float llx, float lly, float urx, float ury, float y) {
	canvas.saveState();
	canvas.setLineWidth(lineWidth);
	canvas.setLineCap(PdfContentByte.LINE_CAP_ROUND);
	canvas.setLineDash(0, gap, gap / 2);
       drawLine(canvas, llx, urx, y);
	canvas.restoreState();
}
 

protected void upperRightAlignmentMark(final PdfContentByte cb) {
    cb.saveState();
    cb.rectangle(LETTER.width() - (ALIGNMENT_MARGIN * 4) - ALIGNMENT_MARK_WIDTH,
                 (LETTER.height() + TOP_MARGIN) - ALIGNMENT_MARGIN - ALIGNMENT_MARK_HEIGHT,
                 ALIGNMENT_MARK_WIDTH,
                 ALIGNMENT_MARK_HEIGHT);
    cb.setColorFill(BLACK);
    cb.fill();
    cb.restoreState();
}
 

protected void lowerRightAlignmentMark(final PdfContentByte cb) {
    cb.saveState();
    cb.rectangle(LETTER.width() - (ALIGNMENT_MARGIN * 4) - ALIGNMENT_MARK_WIDTH,
                 ALIGNMENT_MARGIN,
                 ALIGNMENT_MARK_WIDTH,
                 ALIGNMENT_MARK_HEIGHT);
    cb.setColorFill(BLACK);
    cb.fill();
    cb.restoreState();
}
 

protected void lowerLeftAlignmentMark(final PdfContentByte cb) {
    cb.saveState();
    cb.rectangle(ALIGNMENT_MARGIN,
                 ALIGNMENT_MARGIN,
                 ALIGNMENT_MARK_WIDTH,
                 ALIGNMENT_MARK_HEIGHT);
    cb.setColorFill(BLACK);
    cb.fill();
    cb.restoreState();
}
 

protected void upperLeftAlignmentMark(final PdfContentByte cb) {
    cb.saveState();
    cb.rectangle(ALIGNMENT_MARGIN,
                 (LETTER.height() + TOP_MARGIN) - ALIGNMENT_MARK_HEIGHT - ALIGNMENT_MARGIN,
                 ALIGNMENT_MARK_WIDTH,
                 ALIGNMENT_MARK_HEIGHT);
    cb.setColorFill(BLACK);
    cb.fill();
    cb.restoreState();
}
 

public static void addWatermark(PdfStamper pdfStamper, BaseFont baseFont, Color fontColor, String waterMarkString) throws Exception {
	if (null == pdfStamper || null == baseFont) {
		throw new java.lang.Exception("PdfStamper or BaseFont is null.");
	}
	if (StringUtils.isBlank(waterMarkString)) {
		return;
	}
	PdfContentByte pdfContentByte = null;
	Rectangle pageRect = null;
	PdfGState pdfGState = new PdfGState();
	// 设置透明度为0.4
	pdfGState.setFillOpacity(0.4f);
	pdfGState.setStrokeOpacity(0.4f);
       int pageNum = pdfStamper.getReader().getNumberOfPages();
       try {
           for (int i = 1; i <= pageNum; i++) {
           	pageRect = pdfStamper.getReader().getPageSizeWithRotation(i);
           	// 计算水印X,Y坐标
           	float x = pageRect.getWidth() / 2;
           	float y = pageRect.getHeight() / 2;
           	//获得PDF最顶层
           	pdfContentByte = pdfStamper.getOverContent(i);
           	pdfContentByte.saveState();
           	// set Transparency
           	pdfContentByte.setGState(pdfGState);
           	pdfContentByte.beginText();
           	pdfContentByte.setColorFill(fontColor);
           	pdfContentByte.setFontAndSize(baseFont, 60);
           	// 水印文字成45度角倾斜
           	pdfContentByte.showTextAligned(Element.ALIGN_CENTER, waterMarkString, x, y, 45);
           	pdfContentByte.endText();             	
           }
       } catch (Exception e) {
       	e.printStackTrace();
       } finally {
       	pdfContentByte = null;
           pageRect = null;        	
       }
}
 

@Test
public void main() throws Exception {

	Document document = new Document(PageSize.A4, 50, 50, 50, 50);
	PdfWriter writer = PdfWriter.getInstance(document,	PdfTestBase.getOutputStream( "shading.pdf"));
	document.open();

	PdfFunction function1 = PdfFunction.type2(writer, new float[] { 0, 1 },
			null, new float[] { .929f, .357f, 1, .298f }, new float[] {
					.631f, .278f, 1, .027f }, 1.048f);
	PdfFunction function2 = PdfFunction.type2(writer, new float[] { 0, 1 },
			null, new float[] { .929f, .357f, 1, .298f }, new float[] {
					.941f, .4f, 1, .102f }, 1.374f);
	PdfFunction function3 = PdfFunction.type3(writer, new float[] { 0, 1 },
			null, new PdfFunction[] { function1, function2 },
			new float[] { .708f }, new float[] { 1, 0, 0, 1 });
	PdfShading shading = PdfShading.type3(writer,
			new CMYKColor(0, 0, 0, 0),
			new float[] { 0, 0, .096f, 0, 0, 1 }, null, function3,
			new boolean[] { true, true });
	PdfContentByte cb = writer.getDirectContent();
	cb.moveTo(316.789f, 140.311f);
	cb.curveTo(303.222f, 146.388f, 282.966f, 136.518f, 279.122f, 121.983f);
	cb.lineTo(277.322f, 120.182f);
	cb.curveTo(285.125f, 122.688f, 291.441f, 121.716f, 298.156f, 119.386f);
	cb.lineTo(336.448f, 119.386f);
	cb.curveTo(331.072f, 128.643f, 323.346f, 137.376f, 316.789f, 140.311f);
	cb.clip();
	cb.newPath();
	cb.saveState();
	cb.concatCTM(27.7843f, 0, 0, -27.7843f, 310.2461f, 121.1521f);
	cb.paintShading(shading);
	cb.restoreState();

	cb.sanityCheck();

	document.close();
}
 

/**
 * @see com.lowagie.text.pdf.PdfPageEventHelper#onStartPage(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
 */
public void onStartPage(PdfWriter writer, Document document) {
    if (writer.getPageNumber() < 3) {
        PdfContentByte cb = writer.getDirectContentUnder();
        cb.saveState();
        cb.setColorFill(Color.pink);
        cb.beginText();
        cb.setFontAndSize(helv, 48);
        cb.showTextAligned(Element.ALIGN_CENTER, "My Watermark Under " + writer.getPageNumber(), document.getPageSize().getWidth() / 2, document.getPageSize().getHeight() / 2, 45);
        cb.endText();
        cb.restoreState();
    }
}
 

/**
 * @see com.lowagie.text.pdf.draw.DrawInterface#draw(com.lowagie.text.pdf.PdfContentByte, float, float, float, float, float)
 */
public void draw(PdfContentByte canvas, float llx, float lly, float urx, float ury, float y) {
	canvas.saveState();
	canvas.setLineWidth(lineWidth);
	canvas.setLineCap(PdfContentByte.LINE_CAP_ROUND);
	canvas.setLineDash(0, gap, gap / 2);
       drawLine(canvas, llx, urx, y);
	canvas.restoreState();
}
 

/**
 * @see com.lowagie.text.pdf.PdfPTableEvent#tableLayout(com.lowagie.text.pdf.PdfPTable, float[][], float[], int, int, com.lowagie.text.pdf.PdfContentByte[])
 */
public void tableLayout(PdfPTable table, float[][] width, float[] heights, int headerRows, int rowStart, PdfContentByte[] canvases) {
	
	// widths of the different cells of the first row
    float widths[] = width[0];
    
    PdfContentByte cb = canvases[PdfPTable.TEXTCANVAS];
    cb.saveState();
	// border for the complete table
    cb.setLineWidth(2);
    cb.setRGBColorStroke(255, 0, 0);
    cb.rectangle(widths[0], heights[heights.length - 1], widths[widths.length - 1] - widths[0], heights[0] - heights[heights.length - 1]);
    cb.stroke();
    
    // border for the header rows
    if (headerRows > 0) {
        cb.setRGBColorStroke(0, 0, 255);
        cb.rectangle(widths[0], heights[headerRows], widths[widths.length - 1] - widths[0], heights[0] - heights[headerRows]);
        cb.stroke();
    }
    cb.restoreState();
    
    cb = canvases[PdfPTable.BASECANVAS];
    cb.saveState();
    // border for the cells
    cb.setLineWidth(.5f);
    // loop over the rows
    for (int line = 0; line < heights.length - 1; ++line) {
        widths = width[line];
    	// loop over the columns
        for (int col = 0; col < widths.length - 1; ++col) {
            if (line == 0 && col == 0)
                cb.setAction(new PdfAction("http://www.lowagie.com/iText/"),
                    widths[col], heights[line + 1], widths[col + 1], heights[line]);
            cb.setRGBColorStrokeF((float)Math.random(), (float)Math.random(), (float)Math.random());
            // horizontal borderline
            cb.moveTo(widths[col], heights[line]);
            cb.lineTo(widths[col + 1], heights[line]);
            cb.stroke();
            // vertical borderline
            cb.setRGBColorStrokeF((float)Math.random(), (float)Math.random(), (float)Math.random());
            cb.moveTo(widths[col], heights[line]);
            cb.lineTo(widths[col], heights[line + 1]);
            cb.stroke();
        }
    }
    cb.restoreState();
}
 

/**
 * @see com.lowagie.text.pdf.PdfPTableEvent#tableLayout(com.lowagie.text.pdf.PdfPTable,
 *      float[][], float[], int, int, com.lowagie.text.pdf.PdfContentByte[])
 */
public void tableLayout(PdfPTable table, float[][] width, float[] heights, int headerRows, int rowStart,
		PdfContentByte[] canvases) {

	// widths of the different cells of the first row
	float widths[] = width[0];

	PdfContentByte cb = canvases[PdfPTable.TEXTCANVAS];
	cb.saveState();
	// border for the complete table
	cb.setLineWidth(2);
	cb.setRGBColorStroke(255, 0, 0);
	cb.rectangle(widths[0], heights[heights.length - 1], widths[widths.length - 1] - widths[0], heights[0]
			- heights[heights.length - 1]);
	cb.stroke();

	// border for the header rows
	if (headerRows > 0) {
		cb.setRGBColorStroke(0, 0, 255);
		cb.rectangle(widths[0], heights[headerRows], widths[widths.length - 1] - widths[0], heights[0]
				- heights[headerRows]);
		cb.stroke();
	}
	cb.restoreState();

	cb = canvases[PdfPTable.BASECANVAS];
	cb.saveState();
	// border for the cells
	cb.setLineWidth(.5f);
	// loop over the rows
	for (int line = 0; line < heights.length - 1; ++line) {
		// loop over the columns
		for (int col = 0; col < widths.length - 1; ++col) {
			if (line == 0 && col == 0)
				cb.setAction(new PdfAction("http://www.lowagie.com/iText/"), widths[col], heights[line + 1],
						widths[col + 1], heights[line]);
			cb.setRGBColorStrokeF((float) Math.random(), (float) Math.random(), (float) Math.random());
			// horizontal borderline
			cb.moveTo(widths[col], heights[line]);
			cb.lineTo(widths[col + 1], heights[line]);
			cb.stroke();
			// vertical borderline
			cb.setRGBColorStrokeF((float) Math.random(), (float) Math.random(), (float) Math.random());
			cb.moveTo(widths[col], heights[line]);
			cb.lineTo(widths[col], heights[line + 1]);
			cb.stroke();
		}
	}
	cb.restoreState();
}
 

/**
 * Print the table into a PDF file
 */
private void print() {
    Document document = new Document(PageSize.A4.rotate());
    try {
        PdfWriter writer =
        PdfWriter.getInstance(document, PdfTestBase.getOutputStream( "jTable.pdf"));
        
        document.open();
        PdfContentByte cb = writer.getDirectContent();
        
        // Create the graphics as shapes
        cb.saveState();
        Graphics2D g2 = cb.createGraphicsShapes(500, 500);
        // Print the table to the graphics
        Shape oldClip = g2.getClip();
        g2.clipRect(0, 0, 500, 500);
        table.print(g2);
        g2.setClip(oldClip);
        
        g2.dispose();
        cb.restoreState();
        
        document.newPage();
        
        // Create the graphics with pdf fonts
        cb.saveState();
        g2 = cb.createGraphics(500, 500);
        
        // Print the table to the graphics
        oldClip = g2.getClip();
        g2.clipRect(0, 0, 500, 500);
        table.print(g2);
        g2.setClip(oldClip);
        
        g2.dispose();
        cb.restoreState();
        
    } catch (Exception e) {
    	e.printStackTrace();
        System.err.println(e.getMessage());
    }
    
    document.close();
}
 

/**
 * @see com.lowagie.text.pdf.PdfPageEventHelper#onEndPage(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
 */
public void onEndPage(PdfWriter writer, Document document) {
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    // write the headertable
    table.setTotalWidth(document.right() - document.left());
    table.writeSelectedRows(0, -1, document.left(), document.getPageSize().getHeight() - 50, cb);
    // compose the footer
    String text = "Page " + writer.getPageNumber() + " of ";
    float textSize = helv.getWidthPoint(text, 12);
    float textBase = document.bottom() - 20;
    cb.beginText();
    cb.setFontAndSize(helv, 12);
    // for odd pagenumbers, show the footer at the left
    if ((writer.getPageNumber() & 1) == 1) {
        cb.setTextMatrix(document.left(), textBase);
        cb.showText(text);
        cb.endText();
        cb.addTemplate(tpl, document.left() + textSize, textBase);
    }
    // for even numbers, show the footer at the right
    else {
        float adjust = helv.getWidthPoint("0", 12);
        cb.setTextMatrix(document.right() - textSize - adjust, textBase);
        cb.showText(text);
        cb.endText();
        cb.addTemplate(tpl, document.right() - adjust, textBase);
    }

    // draw a Rectangle around the page
    cb.setColorStroke(Color.orange);
    cb.setLineWidth(2);
    cb.rectangle(20, 20, document.getPageSize().getWidth() - 40, document.getPageSize().getHeight() - 40);
    cb.stroke();

    // starting on page 3, a watermark with an Image that is made transparent
    if (writer.getPageNumber() >= 3) {

        cb.setGState(gstate);
        cb.setColorFill(Color.red);
        cb.beginText();
        cb.setFontAndSize(helv, 48);
        cb.showTextAligned(Element.ALIGN_CENTER, "Watermark Opacity " + writer.getPageNumber(), document.getPageSize().getWidth() / 2, document.getPageSize().getHeight() / 2, 45);
        cb.endText();
        try {
            cb.addImage(headerImage, headerImage.getWidth(), 0, 0, headerImage.getHeight(), 440, 80);
        }
        catch(Exception e) {
            throw new ExceptionConverter(e);
        }
    }
    cb.restoreState();
    cb.sanityCheck();
}
 

/**
 * Changing the Graphics State with saveState() and restoreState().
 * 
 */
@Test
public void main() throws Exception {

	// step 1: creation of a document-object
	Document document = new Document();

	try {

		// step 2:
		// we create a writer that listens to the document
		// and directs a PDF-stream to a file
		PdfWriter writer = PdfWriter.getInstance(document,
				PdfTestBase.getOutputStream( "state.pdf"));

		// step 3: we open the document
		document.open();

		// step 4: we grab the ContentByte and do some stuff with it
		PdfContentByte cb = writer.getDirectContent();

		cb.circle(260.0f, 500.0f, 250.0f);
		cb.fill();
		cb.saveState();
		cb.setColorFill(Color.red);
		cb.circle(260.0f, 500.0f, 200.0f);
		cb.fill();
		cb.saveState();
		cb.setColorFill(Color.blue);
		cb.circle(260.0f, 500.0f, 150.0f);
		cb.fill();
		cb.restoreState();
		cb.circle(260.0f, 500.0f, 100.0f);
		cb.fill();
		cb.restoreState();
		cb.circle(260.0f, 500.0f, 50.0f);
		cb.fill();
		
		cb.sanityCheck();
	} catch (DocumentException de) {
		System.err.println(de.getMessage());
	} catch (IOException ioe) {
		System.err.println(ioe.getMessage());
	}

	// step 5: we close the document
	document.close();
}
 

public void saveState(PdfContentByte cb) {
    cb.saveState();
    MetaState state = new MetaState(this);
    savedStates.push(state);
}
 

public void saveState(PdfContentByte cb) {
	cb.saveState();
	MetaState state = new MetaState(this);
	savedStates.push(state);
}
 

/**
 * @see com.lowagie.text.pdf.draw.DrawInterface#draw(com.lowagie.text.pdf.PdfContentByte, float, float, float, float, float)
 */
public void draw(PdfContentByte canvas, float llx, float lly, float urx, float ury, float y) {
    canvas.saveState();
    drawLine(canvas, llx, urx, y);
    canvas.restoreState();
}