Application: gvSIG desktop

package org.cresques.ui.cmd;

import java.awt.Cursor;

import java.awt.geom.Point2D;

import org.cresques.ui.CQCursor;

import org.cresques.ui.CQMapCanvas;

/**

 * Comando measure.

 * A?ade al canvas la capacidad de medir distancias.

 * @author "Luis W. Sevilla" <sevilla_lui@gva.es>

 */

public class CmdMeasure extends Cmd {

        private Point2D ptIni = null;

        /**

         * Construye un nuevo CmdMeasure para el Canvas.

         * @param canvas

         */

        public CmdMeasure(CQMapCanvas canvas) {

                super(canvas);

                eventsWanted = LEFT | PRESS | RELEASE;

                cursor = CQCursor.getCursor(Cursor.CROSSHAIR_CURSOR);

        }

        /**

         * Recibe los eventos del rat?n.

         */

        public void cmd(Point2D pt, int btn, int mouseEvent) {

                if (mouseEvent == Cmd.RELEASE) {

                        measure(ptIni, pt);

                } else if (mouseEvent == Cmd.PRESS) {

                        ptIni = pt;

                }

        }

        /**

         * Mide la distancia entre dos puntos.

         * @param ptIni Punto inicial.

         * @param ptFin Punto final.

         */void measure(Point2D ptIni, Point2D ptFin) {

                //canvas.getVPData().pan(ptIni, ptFin);

                //canvas.viewPortChanged();

                //canvas.repaint();

        }

}