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/*

 * Cresques Mapping Suite. Graphic Library for constructing mapping applications.

 *

 * Copyright (C) 2004-5.

 *

 * 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:

 *

 * cresques@gmail.com

 */

package org.cresques.ui.cmd;

import org.cresques.px.gml.Feature;

import org.cresques.px.gml.LineString;

import org.cresques.ui.CQCursor;

import org.cresques.ui.CQMapCanvas;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

import java.util.Vector;

/**

 * Comando pline.

 * A?ade al canvas la capacidad de crear polilineas.

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

 */

public class CmdPLine extends Cmd {

    private Point2D ptIni = null;

    private Vector pts = new Vector();

    private Feature pLine = null;

    /**

     * Construye un nuevo CmdPLine para el Canvas.

     * @param canvas

     */

    public CmdPLine(CQMapCanvas canvas) {

        super(canvas);

        eventsWanted = LEFT | RIGHT | PRESS | RELEASE;

        cursor = CQCursor.getCursor(CQCursor.SELECT_CURSOR);

    }

    /**

     * Recibe los eventos del rat?n.

     */

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

        if (mouseEvent == Cmd.RELEASE) {

            if (bt == MouseEvent.BUTTON1) {

                pts.add(pt);

                pline();

            } else {

                pts = new Vector();

            }

        }

    }

    /**

     * A?ade el punto actual a la PLine. La crea si no existe.

     * @param ptIni Punto inicial.

     * @param ptFin Punto final.

     */

    private void pline() {

        if (pts.size() > 2) {

            pLine.getGeometry().add((Point2D) pts.lastElement());

        } else if (pts.size() == 2) {

            pLine = new Feature();

            pLine.setGeometry(new LineString());

            pLine.getGeometry().add((Point2D) pts.get(0));

            pLine.getGeometry().add((Point2D) pts.get(1));

            canvas.getApp().getCurrentLayer().add(pLine);

        }

        canvas.repaint();

    }

}