Java Code Examples for org.geotools.geometry.jts.ReferencedEnvelope#expandBy()

/**
 * Draw the map on an image.
 * 
 * @param bounds the area of interest.
 * @param imageWidth the width of the image to produce.
 * @param imageHeight the height of the image to produce.
 * @param buffer the buffer to add around the map bounds in map units. 
 * @return the image.
 */
public BufferedImage drawImage( ReferencedEnvelope ref, int imageWidth, int imageHeight, double buffer ) {
    checkMapContent();

    if (buffer > 0.0)
        ref.expandBy(buffer, buffer);

    Rectangle2D refRect = new Rectangle2D.Double(ref.getMinX(), ref.getMinY(), ref.getWidth(), ref.getHeight());
    Rectangle2D imageRect = new Rectangle2D.Double(0, 0, imageWidth, imageHeight);

    GeometryUtilities.scaleToRatio(imageRect, refRect, false);

    ReferencedEnvelope newRef = new ReferencedEnvelope(refRect, ref.getCoordinateReferenceSystem());

    Rectangle imageBounds = new Rectangle(0, 0, imageWidth, imageHeight);
    BufferedImage dumpImage = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);
    Graphics2D g2d = dumpImage.createGraphics();
    g2d.fillRect(0, 0, imageWidth, imageHeight);
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

    synchronized (renderer) {
        renderer.paint(g2d, imageBounds, newRef);
    }

    return dumpImage;
}
 

public void drawImage( Graphics2D g2d, ReferencedEnvelope ref, int imageWidth, int imageHeight, double buffer ) {
    checkMapContent();

    if (buffer > 0.0)
        ref.expandBy(buffer, buffer);

    Rectangle2D refRect = new Rectangle2D.Double(ref.getMinX(), ref.getMinY(), ref.getWidth(), ref.getHeight());
    Rectangle2D imageRect = new Rectangle2D.Double(0, 0, imageWidth, imageHeight);

    GeometryUtilities.scaleToRatio(imageRect, refRect, false);

    ReferencedEnvelope newRef = new ReferencedEnvelope(refRect, ref.getCoordinateReferenceSystem());

    Rectangle imageBounds = new Rectangle(0, 0, imageWidth, imageHeight);
    Color white = Color.white;
    g2d.setColor(new Color(white.getRed(), white.getGreen(), white.getBlue(), 0));
    g2d.fillRect(0, 0, imageWidth, imageHeight);
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

    synchronized (renderer) {
        content.getViewport().setBounds(newRef);
        renderer.paint(g2d, imageBounds, newRef);
    }
}
 

/**
 * Expand envelope.
 *
 * @param bounds the bounds
 */
private void expandEnvelope(ReferencedEnvelope bounds) {
    Unit<?> unit =
            CRSUtilities.getUnit(bounds.getCoordinateReferenceSystem().getCoordinateSystem());

    double width;
    double height;
    if (unit == NonSI.DEGREE_ANGLE) {
        width =
                (bounds.getWidth() < BOUNDINGBOX_BUFFER_THRESHOLD_ANGLE)
                        ? BOUNDINGBOX_BUFFER_MIN_ANGLE
                        : (bounds.getWidth() * BOUNDINGBOX_BUFFER_ANGLE);
        height =
                (bounds.getHeight() < BOUNDINGBOX_BUFFER_THRESHOLD_ANGLE)
                        ? BOUNDINGBOX_BUFFER_MIN_ANGLE
                        : (bounds.getHeight() * BOUNDINGBOX_BUFFER_ANGLE);
    } else {
        width =
                (bounds.getWidth() < BOUNDINGBOX_BUFFER_THRESHOLD_LINEAR)
                        ? BOUNDINGBOX_BUFFER_MIN_LINEAR
                        : (bounds.getWidth() * BOUNDINGBOX_BUFFER_LINEAR);
        height =
                (bounds.getHeight() < BOUNDINGBOX_BUFFER_THRESHOLD_LINEAR)
                        ? BOUNDINGBOX_BUFFER_MIN_LINEAR
                        : (bounds.getHeight() * BOUNDINGBOX_BUFFER_LINEAR);
    }

    bounds.expandBy(width, height);
}
 

@Override
public void zoomIn() {
	final ReferencedEnvelope env = pane.getDisplayArea();
	env.expandBy(-env.getWidth() / 10, -env.getHeight() / 10);
	pane.setDisplayArea(env);
}
 

@Override
public void zoomOut() {
	final ReferencedEnvelope env = pane.getDisplayArea();
	env.expandBy(env.getWidth() / 10, env.getHeight() / 10);
	pane.setDisplayArea(env);
}