beanlayoutmanagerbeaninfo.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.

/* **********************************************************************
 * 
 *    Use, duplication, or disclosure by the Government is subject to
 *           restricted rights as set forth in the DFARS.
 *  
 *                         BBNT Solutions LLC
 *                             A Part of 
 *                  Verizon      
 *                          10 Moulton Street
 *                         Cambridge, MA 02138
 *                          [phone]
 *
 *    Copyright (C) 2002 by BBNT Solutions, LLC
 *                 All Rights Reserved.
 * ********************************************************************** */

package com.bbn.openmap.tools.beanbox;

import java.beans.*;
import java.util.List;
import java.util.ArrayList;

/**
 * BeanInfo for a
 * {@link com.bbn.openmap.tools.beanbox.BeanLayoutManager}.
 */
public class BeanLayoutManagerBeanInfo extends SimpleBeanInfo {

    /**
     * returns the location of the 16 x 16 bit image icon.
     */
    public String getImage16Location() {
        return "BeanLayoutManagerIcon16.gif";
    }

    /**
     * returns the location of the 32 x 32 bit image icon.
     */
    public String getImage32Location() {
        return "BeanLayoutManagerIcon32.gif";
    }

    /**
     * subclasses should NOT over-ride this method. Instead, they
     * should over-ride localProperties to create their own
     * properties.
     */
    public PropertyDescriptor[] getPropertyDescriptors() {
        ArrayList list = new ArrayList(10);
        localProperties(list);
        return (PropertyDescriptor[]) list.toArray(new PropertyDescriptor[0]);
    }

    /**
     * direct and indirect subclasses of this bean info class should
     * override this method to add their property descripters to the
     * list generated by the super-class method. A localProperties
     * method written in the subclass should include in a call to
     * super.localProperties in order to get the list of superclass
     * property descripters. It should then add its own property
     * descriptors to this list. A subclass does not need to over-ride
     * this method if it has no property descripters of its own to add
     * to the list of super-class descriptors.
     * 
     * @param ps a List containing property descripters of all super
     *        classes.
     */
    protected void localProperties(List ps) {}

    /**
     * returns the image associated with the bean. This method calls
     * getImage16Location() and getImage32Location() to locate the
     * image file.
     * 
     * @return An image object containing a 16 x 16 bit image is
     *         returned if found otherwise a 32 x 32 bit image is
     *         returned if found. Else a null is returned.
     */
    public java.awt.Image getIcon(int iconKind) {
        if (iconKind == BeanInfo.ICON_COLOR_16x16
                || iconKind == BeanInfo.ICON_MONO_16x16) {
            java.awt.Image img = loadImage(getImage16Location());
            return img;
        } else if (iconKind == BeanInfo.ICON_COLOR_32x32
                || iconKind == BeanInfo.ICON_MONO_32x32) {
            java.awt.Image img = loadImage(getImage32Location());
            return img;
        }
        return null;
    }

    /**
     * A convenience method to create and add a property descriptor to
     * a list. A subclass of this bean info class can use this method
     * to add its own property descriptors to the list of super class
     * property descriptors made available in the localProperties
     * method.
     * 
     * @param ps list of property descriptors
     * @param name the name of the property
     * @param beanClass the Bean class defining the property
     */
    protected static void property(List ps, String name, Class beanClass) {
        property(ps, name, beanClass, null);
    }

    /**
     * A convenience method to create and add a property descriptor to
     * a list and associate an editor class with the property. A
     * subclass of this bean info class can use this method to add its
     * own property descriptors to the list of super class property
     * descriptors made available in the localProperties method.
     * 
     * @param ps list of property descriptors
     * @param name the name of the property
     * @param beanClass the Bean class defining the property
     * @param editorClass a class to be registered as the editor for
     *        the specified property.
     */
    protected static void property(List ps, String name, Class beanClass,
                                   Class editorClass) {
        try {
            PropertyDescriptor pd = new PropertyDescriptor(name, beanClass);
            if (editorClass != null)
                pd.setPropertyEditorClass(editorClass);
            ps.add(pd);
        } catch (Exception e) {
        }
    }
}