Application: gvSIG desktop

/*

 * Created on 16-jul-2004

 *

 */

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * 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 2

 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package com.iver.cit.gvsig.project.documents.layout;

import java.awt.Point;

import java.awt.geom.AffineTransform;

import java.awt.geom.NoninvertibleTransformException;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import java.util.ArrayList;

import org.cresques.cts.IProjection;

import com.iver.cit.gvsig.fmap.ViewPort;

/**

 * Clase que recoge m?todos est?ticos sobre el Layout.

 *

 * @author Vicente Caballero Navarro

 */

public class FLayoutUtilities {

        private static double scale=0;

        private static Point2D.Double auxp;

        private static double distX=0;

        private static double distY=0;

        /**

         * Devuelve true si las dos ArrayList que se le pasan como parametro son

         * iguales.

         *

         * @param n lista anterior

         * @param l lista actual

         *

         * @return true si los ArrayList son iguales.

         */

        public static boolean isEqualList(ArrayList n, ArrayList l) {

                if (n.size() != l.size()) {

                        return false;

                }

                for (int i = 0; i < n.size(); i++) {

                        if (l.get(i) != n.get(i)) {

                                return false;

                        }

                }

                return true;

        }

        /**

         * Pasa una distancia en pixels a unidades del folio.

         *

         * @param d distancia en pixels.

         * @param at Matriz de transformaci?n.

         *

         * @return distancia en unidades de folio.

         */

        public static double toSheetDistance(double d, AffineTransform at) {

                double dist = d / at.getScaleX(); // pProv.x;

                return dist;

        }

        /**

         * Pasa una distancia de coordenadas del folio a pixels.

         *

         * @param d distancia en coordenadas de folio.

         * @param at Matriz de transformaci?n.

         *

         * @return double en pixels.

         */

        public static double fromSheetDistance(double d, AffineTransform at) {

                Point2D.Double pSheet1 = new Point2D.Double(0, 0);

                Point2D.Double pSheet2 = new Point2D.Double(1, 0);

                Point2D.Double pScreen1 = new Point2D.Double();

                Point2D.Double pScreen2 = new Point2D.Double();

                try {

                        at.transform(pSheet1, pScreen1);

                        at.transform(pSheet2, pScreen2);

                } catch (Exception e) {

                        System.err.print(e.getMessage());

                }

                return pScreen1.distance(pScreen2) * d;

        }

        /**

         * Pasa un punto en pixels a coordenadas del folio.

         *

         * @param pScreen pixels.

         * @param at Matriz de transformaci?n.

         *

         * @return Point2D en coordenadas de folio.

         */

        public static Point2D.Double toSheetPoint(Point2D pScreen,

                AffineTransform at) {

                Point2D.Double pWorld = new Point2D.Double();

                AffineTransform at1;

                try {

                        at1 = at.createInverse();

                        at1.transform(pScreen, pWorld);

                } catch (NoninvertibleTransformException e) {

                }

                return pWorld;

        }

        /**

         * Pasa un ret?ngulo de pixels a coordenadas del folio.

         *

         * @param r rect?ngulo en coordenadas de pixels a coordenadas de folio.

         * @param at Matriz de transformaci?n.

         *

         * @return Rectangle2D en coordenadas de folio.

         */

        public static Rectangle2D.Double toSheetRect(Rectangle2D r,

                AffineTransform at) {

                Point2D.Double pSheet = toSheetPoint(new Point2D.Double(r.getX(),

                                        r.getY()), at);

                Point2D.Double pSheetX = toSheetPoint(new Point2D.Double(r.getMaxX(),

                                        r.getMinY()), at);

                Point2D.Double pSheetY = toSheetPoint(new Point2D.Double(r.getMinX(),

                                        r.getMaxY()), at);

                Rectangle2D.Double res = new Rectangle2D.Double();

                res.setRect(pSheet.getX(), pSheet.getY(), pSheet.distance(pSheetX),

                        pSheet.distance(pSheetY));

                return res;

        }

        /**

         * Pasa de un punto en coordenadas del folio a pixels.

         *

         * @param pSheet punto en coordenadas de folio.

         * @param at Matriz de transformaci?n.

         *

         * @return Point2D en pixels.

         */

        public static Point2D.Double fromSheetPoint(Point2D pSheet,

                AffineTransform at) {

                Point2D.Double pScreen = new Point2D.Double();

                try {

                        at.transform(pSheet, pScreen);

                } catch (Exception e) {

                        System.err.print(e.getMessage());

                }

                return pScreen;

        }

        /**

         * Pasa un rect?ngulo en coordenadas del folio a pixels.

         *

         * @param r rect?ngulo en coordenadas de folio.

         * @param at Matriz de transformaci?n.

         *

         * @return Rectangle2D en pixels.

         */

        public static Rectangle2D.Double fromSheetRect(Rectangle2D r,

                AffineTransform at) {

                Point2D.Double pSheet = new Point2D.Double(r.getX(), r.getY());

                Point2D.Double pSX = new Point2D.Double(r.getMaxX(), r.getMinY());

                Point2D.Double pSY = new Point2D.Double(r.getMinX(), r.getMaxY());

                Point2D.Double pScreen = new Point2D.Double();

                Point2D.Double pScreenX = new Point2D.Double();

                Point2D.Double pScreenY = new Point2D.Double();

                try {

                        at.transform(pSheet, pScreen);

                        at.transform(pSX, pScreenX);

                        at.transform(pSY, pScreenY);

                } catch (Exception e) {

                        System.err.print(e.getMessage());

                }

                Rectangle2D.Double res = new Rectangle2D.Double();

                res.setRect(pScreen.getX(), pScreen.getY(), pScreen.distance(pScreenX),

                        pScreen.distance(pScreenY));

                return res;

        }

        /**

         * Obtiene el punto ajustado al grid del layout.

         *

         * @param p Punto a ajustar.

         * @param distX Distancia m?nima en pixels de X.

         * @param distY Distancia m?nima en pixels de Y.

         * @param at Matriz de transformaci?n.

         */

        public static Point getPointGrid(Point p, double dX, double dY,

                        AffineTransform at) {

                if (scale!=at.getScaleX()){

                        scale = at.getScaleX();

                        auxp = FLayoutUtilities.fromSheetPoint(new Point2D.Double(

                                                0, 0), at);

                        distX=FLayoutUtilities.fromSheetDistance(dX, at);

                        distY=FLayoutUtilities.fromSheetDistance(dY, at);

                }

                int x = (int)(((p.getX() - distX) % distX) - ((auxp.x) % distX));

                int y = (int)(((p.getY() - distY) % distY) - ((auxp.y) % distY));

                return new Point((int)(p.getX()-x),(int)(p.getY()-y));

        }

        /**

         * Cuando se dibuja sobre el graphics todo se tiene que situar en enteros y

         * aqu? lo que se comprueba es que si los valores que contiene el

         * Rectangle2D, que toma como par?metro, supera los valores soportados por

         * un entero.

         *

         * @param r Rectangle2D a comprobar si los valores que contiene no superan

         *                   a los que puede tener un entero.

         *

         * @return true si no se han superado los l?mites.

         */

        public static boolean isPosible(Rectangle2D.Double r) {

                if ((r.getMaxX() > Integer.MAX_VALUE) ||

                                (r.getMaxY() > Integer.MAX_VALUE) ||

                                (r.getMinX() < Integer.MIN_VALUE) ||

                                (r.getMinY() < Integer.MIN_VALUE) ||

                                (r.getWidth() > Integer.MAX_VALUE) ||

                                (r.getHeight() > Integer.MAX_VALUE)) {

                        return false;

                }

                return true;

        }

        /**

         * Devuelve un long representando a la escala en funci?n  de que unidad de

         * medida se pase como par?metro.

         *

         * @param map FMap

         * @param h Rect?ngulo.

         *

         * @return escala.

         */

/*        public static long getScaleView(FMap map, double h) {

                if (map == null) {

                        return 0;

                }

                long scaleView = 1;

                double hextent = map.getViewPort().getExtent().getHeight();

                double hview = h;

                scaleView = (long) (Attributes.CHANGE[map.getViewPort().getMapUnits()] * (hextent / hview));

                return scaleView;

        }

        */

        public static long getScaleView(ViewPort viewPort,double wcm,double wpixels) {

                double dpi = wpixels/wcm*2.54;

                IProjection proj = viewPort.getProjection();

                //if (viewPort.getImageSize() == null)

                //    return -1;

                if (viewPort.getAdjustedExtent() == null) {

                        return 0;

                }

                if (proj == null || viewPort.getImageSize() == null) {

                        return (long) (viewPort.getAdjustedExtent().getHeight() / wcm * Attributes.CHANGE[viewPort

                                                                                                                                                                        .getMapUnits()]);

                }

                return (long) proj.getScale(viewPort.getAdjustedExtent().getMinX(),

                        viewPort.getAdjustedExtent().getMaxX(),

                        wpixels, dpi);

        }

}