Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 3

 * of the License, or (at your option) any later version.

 *

 * This program 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.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.app.project.documents.view;

import java.awt.BasicStroke;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Point;

import java.awt.geom.AffineTransform;

import java.awt.geom.Line2D;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import java.awt.image.BufferedImage;

import org.cresques.cts.IProjection;

import org.gvsig.app.project.documents.view.toolListeners.MapOverviewChangeZoomListener;

import org.gvsig.app.project.documents.view.toolListeners.MapOverviewListener;

import org.gvsig.app.project.documents.view.toolListeners.MapOverviewPanListener;

import org.gvsig.fmap.dal.exception.ReadException;

import org.gvsig.fmap.geom.primitive.Envelope;

import org.gvsig.fmap.mapcontext.MapContext;

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontext.events.ColorEvent;

import org.gvsig.fmap.mapcontext.events.ExtentEvent;

import org.gvsig.fmap.mapcontext.events.ProjectionEvent;

import org.gvsig.fmap.mapcontext.events.listeners.ViewPortListener;

import org.gvsig.fmap.mapcontrol.MapControl;

import org.gvsig.fmap.mapcontrol.tools.Behavior.Behavior;

import org.gvsig.fmap.mapcontrol.tools.Behavior.DraggerBehavior;

import org.gvsig.fmap.mapcontrol.tools.Behavior.PointBehavior;

import org.gvsig.fmap.mapcontrol.tools.Behavior.RectangleBehavior;

/**

 * <p>Lightweight <code>MapControl</code> that uses another <code>MapControl</code>'s <code>MapContext</code>, and updates

 *  any rectangular extent selected, to the associated <code>MapControl</code>.</p>

 *

 * <p>Both <code>MapControl</code> instances work in the same projection. And, always, the not undefined <i>adjusted extent</i>

 *  of the associated one, will be enhanced as a red-bordered grey-filled rectangle in this one. Furthermore, draws a horizontal and vertical

 *  this component's width or height, black lines centered in that rectangle.</p>

 *

 * @author FJP

 */

public class MapOverview extends MapControl implements ViewPortListener {

        /**

         * 

         */

        private static final long serialVersionUID = -2849739771493279542L;

        /**

         * <p>Associated <code>MapControl</code> instance that this component represents its overview.</p>

         */

        private MapControl m_MapAssoc;

        /**

         * <p>Determines that's the first time this component is going to be painted.</p>

         */

        boolean first = true;

        /**

         * <p>Tool listener used to apply a <i>zoom out</i> operation in this component graphical information.</p>

         */

        private MapOverviewListener movl;

        /**

         * <p>Tool listener used to allow user work with this component applying <i>pan</i> operations.</p>

         */

        private MapOverviewPanListener movpl;

        /**

         * <p>Tool listener used to allow user work with this component applying <i>pan</i> operations.</p>

         */

        private MapOverviewChangeZoomListener movczl;

        /**

         * <p>Rectangular area selected in this component, that will be the extent of the associated <code>MapControl</code> instance.</p>

         */

        private Envelope extent;

        /**

         * <p>Double buffer used to paint this component graphical information.</p>

         */

        private BufferedImage image;

        /**

         * <p>Creates a <code>MapOverview</code> instance associated to <code>mapAssoc</code>.</p>

         *

         * @param mapAssoc <code>MapControl</code> this component will be the overview

         */

        public MapOverview(MapControl mapAssoc) {

                super();

                this.setName("MapOverview");

                // super.vp.setBackColor(new Color(230,230,230));

                m_MapAssoc = mapAssoc;

                // setModel((FMap) m_MapAssoc.getMapContext().clone()); // Lo inicializamos con

                // los mismos temas que tenga el grande.

                movl = new MapOverviewListener(this);

                movpl = new MapOverviewPanListener(this);

                movczl = new MapOverviewChangeZoomListener(this);

                addBehavior(

                                "zoomtopoint",

                                new Behavior[]{

                                                new PointBehavior(movl),

                                                new RectangleBehavior(movczl),

                                                new DraggerBehavior(movczl),

                                                new DraggerBehavior(movpl)

                                }

                );

//                setCursor(movl.getCursor());

                setTool("zoomtopoint");

                getGrid().setShowGrid(false);

                getGrid().setAdjustGrid(false);

        }

        /**

         * @see MapControl#getMapContext()

         */

        public MapContext getAssociatedMapContext() {

                return m_MapAssoc.getMapContext();

        }

        /**

         * <p>Gets the <code>MapControl</code> instance that wrappers.</p>

         *

         * @return the <code>MapControl</code> instance that wrappers

         */

        public MapControl getAssociatedMapControl(){

                return m_MapAssoc;

        }

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.ViewPortListener#extentChanged(com.iver.cit.gvsig.fmap.ExtentEvent)

         */

        public void extentChanged(ExtentEvent evExtent) {

                // Nos llega el nuevo extent del FMap asociado, as? que dibujamos nuestro

                // rect?ngulo para mostrar la zona de dibujo del otro mapa.

                repaint();

        }

        /**

         * <p>If this had no extent, calls {@link #delModel() #delModel()}, otherwise recalculates this

         *  component's view port extent as the union of all extents of all layers of this map.</p>

         */

        public void refreshExtent() {

                try {

                if (this.getMapContext().getFullEnvelope()!=null){

                                this.getMapContext().getViewPort().setEnvelope(this.getMapContext().getFullEnvelope());

                } else {

                        // delModel();

                }

                } catch (ReadException e1) {

                        e1.printStackTrace();

                }

        }

        /**

         * <p>Repaints this component updating its <i>extent</i>.</p>

         *

         * @param r the new extent

         */

        public void refreshOverView(Envelope r){

                extent=r;

                repaint();

        }

        /**

         * <p>Paints this component's graphical information using a 8-bit RGBA color double buffer, drawing a red-bordered

         *  grey-filled rectangle enhancing the extent selected, and a horizontal and vertical this component's width or

         *  height, black lines centered in that rectangle.</p>

         */

        protected void paintComponent(Graphics g) {

                getGrid().setShowGrid(false);

                getGrid().setAdjustGrid(false);

                super.paintComponent(g);

                if (m_MapAssoc.getMapContext().getViewPort().getEnvelope() != null &&

                                        getMapContext().getViewPort().getEnvelope() != null &&

                                        getMapContext().getLayers().getLayersCount() > 0) {

                                if (first) {

                                        first = false;

                                        repaint();

                                        return;

                                }

                                image = new BufferedImage(this.getWidth(), this.getHeight(),

                                    BufferedImage.TYPE_INT_ARGB);

                                ViewPort vp = getMapContext().getViewPort();

                                Envelope extentView=vp.getAdjustedEnvelope();

                                ViewPort vpOrig = m_MapAssoc.getMapContext().getViewPort();

                                if (extent==null) {

                                        extent=vpOrig.getAdjustedEnvelope();

                                }

                                // Dibujamos el extent del mapa asociado.

                                Graphics2D g2 = (Graphics2D) image.getGraphics();

                                g2.setTransform(vp.getAffineTransform());

                                g2.setStroke(new BasicStroke((float) vp.getDist1pixel()));

                                g2.setColor(Color.red);

                                Rectangle2D extentToDraw=new Rectangle2D.Double(extent.getMinimum(0),extent.getMinimum(1),extent.getLength(0),extent.getLength(1));

                                g2.draw(extentToDraw);

                                g2.setColor(new Color(100,100,100,100));

                                g2.fill(extentToDraw);

                                // dibujamos las l?neas vertical y horizontal

                                Point2D pRightUp = vp.toMapPoint(getWidth(), 0);

                                Line2D.Double linVert = new Line2D.Double(extentToDraw.getCenterX(),

                                                extentView.getMinimum(1), extentToDraw.getCenterX(),

                                                pRightUp.getY());

                                Line2D.Double linHoriz = new Line2D.Double(extentView.getMinimum(0),

                                                extentToDraw.getCenterY(), pRightUp.getX(),

                                                extentToDraw.getCenterY());

                                g2.setColor(Color.darkGray);

                                g2.draw(linVert);

                                g2.draw(linHoriz);

                                g.drawImage(image,0,0,this);

                                g2.setTransform(new AffineTransform());

                                extent=null;

                        }

        }

        /**

         * <p>Sets a <code>MapContext</code> to this component, configuring it to manage view port events produced

         *  in the associated <code>MapControl</code> and this one's view port.</p>

         *

         * <p>This <code>MapContext</code>'s projection will be the same as the associated <code>MapControl</code>'s one.</p>

         *

         * <p>Setting the model includes the following steps:

         *  <ul>

         *   <li><b>1.-</b> set <code>model</code> as the <code>MapContext</code> of <code>this</code>.</li>

         *   <li><b>2.-</b> set as <code>model</code> projection, the associated <code>MapControl<code>'s projection.</li>

         *   <li><b>3.-</b> set <code>this</code> as <i>view port</i> listener of the associated <code>MapControl</code>'s <i>view port</i>.</li>

         *   <li><b>4.-</b> set <code>this</code> as <i>view port</i> listener of this <code>MapContext</code>'s <i>view port</i></li>

         *  </ul>

         * </p>

         *

         * @param model data to set

         */

        public void setModel(MapContext model) {

                this.setMapContext(model);

                model.setProjection(m_MapAssoc.getMapContext().getProjection());

                m_MapAssoc.getMapContext().getViewPort().addViewPortListener(this);

                getMapContext().getViewPort().addViewPortListener(this);

        }

        /**

         * <p>Removes this component as listener of the the associated <code>MapControl</code> and this one's view port. Besides,

     *  removes the extent.</p>

         */

        /*

        private void delModel(){

                this.getMapContext().getViewPort().setEnvelope(null);

                m_MapAssoc.getMapContext().getViewPort().removeViewPortListener(this);

                getMapContext().getViewPort().removeViewPortListener(this);

        }

        */

        /*

         * (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.ViewPortListener#backColorChanged(com.iver.cit.gvsig.fmap.ColorEvent)

         */

        public void backColorChanged(ColorEvent e) {

                // do nothing

        }

        /**

         * @see ViewPortListener#projectionChanged(ProjectionEvent)

         *

         * @see MapControl#setProjection(IProjection)

         */

        public void projectionChanged(ProjectionEvent e) {

                super.setProjection(e.getNewProjection());

        }

        /**

         * <p>Unimplemented.</p>

         *

         * <p>Can't change the projection, because must be the same as the one of the

         *  associated <code>MapControl</code> instance.</p>

         */

        public void setProjection(IProjection proj) {

                //No permitimos cambiar la proyeccion

                //ya que debe ser la misma que la del

                //MapControl asociado

                return;

        }

        public void calculateSnapPoint(Point point) {

            /*

             * This is the behavior of a MapControl when there is no snapping.

             * We do the same and save a lot of computations

             */

        adjustedPoint = point;

        mapAdjustedPoint = null;

        }

}