ompolyloader.java

openmap java写的开源数字地图程序. 用applet实现,可以像google map 那样放大缩小地图.

// **********************************************************************
// 
// <copyright>
// 
//  BBN Technologies
//  10 Moulton Street
//  Cambridge, MA 02138
//  [phone]
// 
//  Copyright (C) BBNT Solutions LLC. All rights reserved.
// 
// </copyright>
// **********************************************************************
// 
// $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/tools/drawing/OMPolyLoader.java,v $
// $RCSfile: OMPolyLoader.java,v $
// $Revision: 1.3.2.1 $
// $Date: 2004/10/14 18:27:42 $
// $Author: dietrick $
// 
// **********************************************************************

package com.bbn.openmap.tools.drawing;

import com.bbn.openmap.omGraphics.EditableOMGraphic;
import com.bbn.openmap.omGraphics.EditableOMPoly;
import com.bbn.openmap.omGraphics.GraphicAttributes;
import com.bbn.openmap.omGraphics.OMGraphic;
import com.bbn.openmap.omGraphics.OMPoly;
import com.bbn.openmap.omGraphics.labeled.EditableLabeledOMPoly;

/**
 * Loader that knows how to create/edit OMPoly objects.
 */
public class OMPolyLoader extends AbstractToolLoader implements EditToolLoader {

    protected String graphicClassName = "com.bbn.openmap.omGraphics.OMPoly";
    protected String labeledClassName = "com.bbn.openmap.omGraphics.labeled.LabeledOMPoly";

    public OMPolyLoader() {
        init();
    }

    public void init() {
        EditClassWrapper ecw = new EditClassWrapper(graphicClassName, "com.bbn.openmap.omGraphics.EditableOMPoly", "editablepoly.gif", i18n.get(OMPolyLoader.class,
                "ompoly",
                "Polygons/Polylines"));

        addEditClassWrapper(ecw);

        // A class wrapper isn't added here for the LabeledOMPoly
        // because currently they are only created programmatically.
    }

    /**
     * Give the classname of a graphic to create, returning an
     * EditableOMGraphic for that graphic. The GraphicAttributes
     * object lets you set some of the initial parameters of the poly,
     * like poly type and rendertype.
     */
    public EditableOMGraphic getEditableGraphic(String classname,
                                                GraphicAttributes ga) {
        if (classname.intern() == graphicClassName) {
            return new EditableOMPoly(ga);
        }
        if (classname.intern() == labeledClassName) {
            return new EditableLabeledOMPoly(ga);
        }
        return null;
    }

    /**
     * Give an OMGraphic to the EditToolLoader, which will create an
     * EditableOMGraphic for it.
     */
    public EditableOMGraphic getEditableGraphic(OMGraphic graphic) {
        if (graphic instanceof OMPoly) {
            return new EditableOMPoly((OMPoly) graphic);
        }
        return null;
    }
}