| gvSIG desktop 1

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

 *

 * Copyright (C) 2007 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.

 */

package org.gvsig.raster.beans.canvas.layers;

import java.awt.Color;

import java.awt.Cursor;

import java.awt.Graphics;

import java.awt.Point;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.awt.event.MouseMotionListener;

import java.awt.geom.Point2D;

import org.gvsig.raster.beans.canvas.DrawableElement;

import org.gvsig.raster.beans.canvas.GCanvas;

/**

 * Representa dos l?neas rectas que se?alizan el m?ximo y el m?nimo.

 *

 * 14-oct-2007

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class MinMaxLines extends DrawableElement implements MouseListener, MouseMotionListener {

        private Point2D minP1 = null;

        private Point2D minP2 = null;

        private Point2D maxP1 = null;

        private Point2D maxP2 = null;

        private int     smallLine = 5;

        private int     minDistance = 2;

        private int     maxDistance = 2;

        private boolean minSelected = false;

        private boolean maxSelected = false;

        /**

         * Constructor. Asigna el color

         * @param c

         */

        public MinMaxLines(Color c) {

                setColor(c);

        }

        /*

         *  (non-Javadoc)

         * @see org.gvsig.gui.beans.canvas.DrawableElement#firstDraw()

         */

        public void firstDrawActions() {

                //El primer dibujado asigna valores a los puntos inicial y final.

                minP1 = new Point(canvas.getCanvasMinX(), canvas.getCanvasMinY());

                minP2 = new Point(canvas.getCanvasMinX(), canvas.getCanvasMaxY());

                maxP1 = new Point(canvas.getCanvasMaxX(), canvas.getCanvasMinY());

                maxP2 = new Point(canvas.getCanvasMaxX(), canvas.getCanvasMaxY());

        }

        /**

         * Dibujado de las l?neas y cuadros sobre el canvas

         */

        public void paint(Graphics g) {

                g.setColor(color);

                int initY = (int)minP1.getY();

                while((initY + smallLine) < minP2.getY()) {

                        int xDist = (int)minP1.getX() + minDistance; 

                        g.drawLine(xDist, initY, xDist, initY + smallLine);

                        initY += (smallLine * 2);

                }

                initY = (int)maxP1.getY();

                while((initY + smallLine) < maxP2.getY()) {

                        int xDist = (int)maxP1.getX() - maxDistance;

                        g.drawLine(xDist, initY, xDist, initY + smallLine);

                        initY += (smallLine * 2);

                }

        }

        /**

         * Asigna el objeto JComponent donde se pintan los elementos. Inicializa los puntos

         * de inicio y fin de l?nea y asigna los listener

         * @param canvas

         */

        public void setCanvas(GCanvas canvas) {

                super.setCanvas(canvas);

                canvas.addMouseListener(this);

                canvas.addMouseMotionListener(this);

        }

        /**

         * Selecciona el eje m?nimo o m?ximo si es rat?n est? sobre ?l.

         */

        public void mouseClicked(MouseEvent e) {

        }

        /**

         * Se captura el punto a arrastrar

         */

        public void mousePressed(MouseEvent e) {

                if(e.getY() > canvas.getCanvasMinY() && e.getY() < canvas.getCanvasMaxY()) {

                        if(e.getX() >= (canvas.getCanvasMinX() + minDistance) && e.getX() <= (canvas.getCanvasMinX() + minDistance + 8) ) 

                                minSelected = true;

                        if(e.getX() >= (canvas.getCanvasMaxX() - maxDistance) && e.getX() <= (canvas.getCanvasMaxX() - maxDistance + 8) ) 

                                maxSelected = true;

                }

        }

        /**

         * Inicializamos el punto arrastrado a un valor fuera del array

         */

        public void mouseReleased(MouseEvent e) {

                minSelected = false;

                maxSelected = false;

                if(actionsManager != null)

                        actionsManager.end(new double[]{getMinDistance(), getMaxDistance()});

        }

        /**

         * Cuando se ha pinchado un punto y se arrastra se define aqu? su comportamiento.

         */

        public void mouseDragged(MouseEvent e) {

                if(minSelected)

                        minDistance = e.getX() - 4;

                if(maxSelected)

                        maxDistance = canvas.getCanvasMaxX() - e.getX();

                canvas.repaint();

        }

        public void mouseMoved(MouseEvent e) {

                if(e.getY() > canvas.getCanvasMinY() && e.getY() < canvas.getCanvasMaxY()) {

                        if( e.getX() >= (canvas.getCanvasMinX() + minDistance) && e.getX() <= (canvas.getCanvasMinX() + minDistance + 3) ||

                                e.getX() >= (canvas.getCanvasMaxX() - maxDistance) && e.getX() <= (canvas.getCanvasMaxX() - maxDistance + 3))

                                canvas.setCursor(new Cursor(Cursor.HAND_CURSOR));

                        else

                                canvas.setCursor(new Cursor(GCanvas.DEFAULT_CURSOR));

                }

        }

        public void mouseEntered(MouseEvent e) {

        }

        public void mouseExited(MouseEvent e) {

        }

        /**

         * Obtiene la distancia de la l?nea del m?nimo al inicio del histograma. La 

         * distancia la devuelve en tanto por cien del tama?o del gr?fico

         * @return Porcentaje de distancia entre el punto inicial del gr?fico hasta la

         * l?nea del m?nimo.

         */

        public double getMinDistance() {

                return ((canvas.getCanvasMinX() + minDistance) * 100 ) / canvas.getCanvasWidth();

        }

        /**

         * Obtiene la distancia de la l?nea del m?ximo al inicio del histograma. La 

         * distancia la devuelve en tanto por cien del tama?o del gr?fico

         * @return Porcentaje de distancia entre el punto inicial del gr?fico hasta la

         * l?nea del m?ximo.

         */

        public double getMaxDistance() {

                return ((canvas.getCanvasMaxX() - maxDistance) * 100 ) / canvas.getCanvasWidth();

        }

        public void setMax(double max) {

                //maxDistance = max

        }

        public void setMin(double min) {

                double value = (min *  canvas.getCanvasWidth()) / 100;

        }

}