org.primefaces.examples.view.DynamicImageController.java Source code

Introduction

Here is the source code for org.primefaces.examples.view.DynamicImageController.java

Source

/*
 * Copyright 2009-2011 Prime Technology.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.primefaces.examples.view;

import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import javax.imageio.ImageIO;

import net.sourceforge.barbecue.BarcodeFactory;
import net.sourceforge.barbecue.BarcodeImageHandler;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.primefaces.model.DefaultStreamedContent;
import org.primefaces.model.StreamedContent;

public class DynamicImageController {

    private StreamedContent graphicText;

    private StreamedContent barcode;

    private StreamedContent chart;

    public DynamicImageController() {
        try {
            //Graphic Text
            BufferedImage bufferedImg = new BufferedImage(100, 25, BufferedImage.TYPE_INT_RGB);
            Graphics2D g2 = bufferedImg.createGraphics();
            g2.drawString("This is a text", 0, 10);
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            ImageIO.write(bufferedImg, "png", os);
            graphicText = new DefaultStreamedContent(new ByteArrayInputStream(os.toByteArray()), "image/png");

            //Chart
            JFreeChart jfreechart = ChartFactory.createPieChart("Turkish Cities", createDataset(), true, true,
                    false);
            File chartFile = new File("dynamichart");
            ChartUtilities.saveChartAsPNG(chartFile, jfreechart, 375, 300);
            chart = new DefaultStreamedContent(new FileInputStream(chartFile), "image/png");

            //Barcode
            File barcodeFile = new File("dynamicbarcode");
            BarcodeImageHandler.saveJPEG(BarcodeFactory.createCode128("PRIMEFACES"), barcodeFile);
            barcode = new DefaultStreamedContent(new FileInputStream(barcodeFile), "image/jpeg");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public StreamedContent getBarcode() {
        return barcode;
    }

    public StreamedContent getGraphicText() {
        return graphicText;
    }

    public StreamedContent getChart() {
        return chart;
    }

    private PieDataset createDataset() {
        DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("Istanbul", new Double(45.0));
        dataset.setValue("Ankara", new Double(15.0));
        dataset.setValue("Izmir", new Double(25.2));
        dataset.setValue("Antalya", new Double(14.8));

        return dataset;
    }
}