MVP.view.helpers.MyImageSource.java Source code

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Here is the source code for MVP.view.helpers.MyImageSource.java

Source

package MVP.view.helpers;

/*
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 */

/**
 *
 * @author User
 */
import com.vaadin.server.StreamResource;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.*;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.imageio.ImageIO;

public class MyImageSource implements StreamResource.StreamSource {

    /**
    * 
    */
    private static final long serialVersionUID = 1L;

    ByteArrayOutputStream imagebuffer = null;
    int reloads = 0;
    /* We need to implement this method that returns
     * the resource as a stream. */

    public InputStream getStream() {
        /* Create an image and draw something on it. */
        BufferedImage image = new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
        Graphics drawable = image.getGraphics();
        drawable.setColor(Color.lightGray);
        drawable.fillRect(0, 0, 200, 200);
        drawable.setColor(Color.yellow);
        drawable.fillOval(25, 25, 150, 150);
        drawable.setColor(Color.blue);
        drawable.drawRect(0, 0, 199, 199);
        drawable.setColor(Color.black);
        drawable.drawString("Reloads=" + reloads, 75, 100);
        reloads++;
        try {
            /* Write the image to a buffer. */
            imagebuffer = new ByteArrayOutputStream();
            ImageIO.write(image, "png", imagebuffer);
            /* Return a stream from the buffer. */
            return new ByteArrayInputStream(imagebuffer.toByteArray());
        } catch (IOException e) {
            return null;
        }
    }
}