/*
 * $Id$
 *
 * This code is part of the 'iText Tutorial'.
 * You can find the complete tutorial at the following address:
 * http://itextdocs.lowagie.com/tutorial/
 *
 * This code 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.
 *
 * itext-questions@lists.sourceforge.net
 */
package com.lowagie.examples.directcontent.graphics;

import java.awt.Color;
import java.io.FileOutputStream;
import java.io.IOException;

import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfGState;
import com.lowagie.text.pdf.PdfWriter;

/**
 * Changing the Graphics State with PdfGState.
 */
public class GState {

	/**
	 * Changing the Graphics State with PdfGState.
	 * 
	 * @param args
	 *            no arguments needed
	 */
	public static void main(String[] args) {
		System.out.println("Changing the Graphics State with PdfGState");

		// 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,
					new FileOutputStream("gstate.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();

            PdfGState gs = new PdfGState();
            gs.setFillOpacity(0.5f);
            cb.setGState(gs);
			cb.setColorFill(Color.red);
			cb.circle(260.0f, 500.0f, 250.0f);
			cb.fill();
			cb.circle(260.0f, 500.0f, 200.0f);
			cb.fill();
			cb.circle(260.0f, 500.0f, 150.0f);
			cb.fill();
			gs.setFillOpacity(0.2f);
			cb.setGState(gs);
			cb.setColorFill(Color.blue);
			cb.circle(260.0f, 500.0f, 100.0f);
			cb.fill();
			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();
	}
}