/*
 * This example was written in answer to:
 * http://stackoverflow.com/questions/34433510
 */
package sandbox.graphics;

import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfShading;
import com.itextpdf.text.pdf.PdfShadingPattern;
import com.itextpdf.text.pdf.PdfWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * @author iText
 */
public class GradientTopToBottom {

    public static final String DEST = "results/graphics/gradient_top_to_bottom.pdf";
    
    public static void main(String[] args) throws IOException, DocumentException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new GradientTopToBottom().createPdf(DEST);
    }
    public void createPdf(String dest) throws IOException, DocumentException {
        Rectangle pageSize = new Rectangle(150, 300);
        Document document = new Document(pageSize);
        PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));
        document.open();
        PdfShading shading = PdfShading.simpleAxial(writer,
                0, pageSize.getHeight(),
                0, 0,
                BaseColor.WHITE, BaseColor.GREEN);
        PdfShadingPattern pattern = new PdfShadingPattern(shading);
        PdfContentByte canvas = writer.getDirectContent();
        canvas.setShadingFill(pattern);
        canvas.rectangle(0, 0, pageSize.getWidth(), pageSize.getHeight());
        canvas.fill();
        document.close();
    }
    
}