Application: gvSIG desktop

import java.awt.geom.Point2D;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.mapcontext.ViewPort;

    @Override

        ViewPort viewPort = this.getMapContext().getViewPort();

        try {

            Envelope oldExtent = viewPort.getAdjustedEnvelope();

            double oldCenterX = oldExtent.getCenter(0);

            double oldCenterY = oldExtent.getCenter(1);

            double centerX = envelope.getCenter(0);

            double centerY = envelope.getCenter(1);

            Point2D.Double center = new Point2D.Double(centerX, centerY);

            double movX = centerX - oldCenterX;

            double movY = centerY - oldCenterY;

            double minx = oldExtent.getMinimum(0) + movX;

            double miny = oldExtent.getMinimum(1) + movY;

            double maxX = oldExtent.getMaximum(0) + movX;

            double maxY = oldExtent.getMaximum(1) + movY;

            Envelope extent = GeometryLocator.getGeometryManager().createEnvelope(

                    minx, miny,

                    maxX, maxY,

                    Geometry.SUBTYPES.GEOM2D);

            viewPort.setEnvelope(extent);

        } catch (Exception e) {

            throw new RuntimeException(e);

        }