drawingmain.java

一个完整的XACML工程,学习XACML技术的好例子!

/*
 * Copyright (c) 2006, University of Kent
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 1. Neither the name of the University of Kent nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * 2. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.
 *
 * 3. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * 4. YOU AGREE THAT THE EXCLUSIONS IN PARAGRAPHS 2 AND 3 ABOVE ARE REASONABLE
 * IN THE CIRCUMSTANCES.  IN PARTICULAR, YOU ACKNOWLEDGE (1) THAT THIS
 * SOFTWARE HAS BEEN MADE AVAILABLE TO YOU FREE OF CHARGE, (2) THAT THIS
 * SOFTWARE IS NOT "PRODUCT" QUALITY, BUT HAS BEEN PRODUCED BY A RESEARCH
 * GROUP WHO DESIRE TO MAKE THIS SOFTWARE FREELY AVAILABLE TO PEOPLE WHO WISH
 * TO USE IT, AND (3) THAT BECAUSE THIS SOFTWARE IS NOT OF "PRODUCT" QUALITY
 * IT IS INEVITABLE THAT THERE WILL BE BUGS AND ERRORS, AND POSSIBLY MORE
 * SERIOUS FAULTS, IN THIS SOFTWARE.
 *
 * 5. This license is governed, except to the extent that local laws
 * necessarily apply, by the laws of England and Wales.
 */

/*
 * DrawingMain.java - 14/08/2006
 */

package issrg.editor2.roleHierarchyDrawings;

import issrg.utils.xml.XMLChangeEvent;
import issrg.utils.xml.XMLChangeListener;
import issrg.utils.xml.XMLEditor;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.image.BufferedImage;
import java.util.Vector;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

/**
 * This class extends a JPanel, and keeps a canvas, in which the defined
 * Role Hierarchies will be drawn.
 *
 * @author Christian Azzopardi
 */
public class DrawingMain extends JPanel implements XMLChangeListener {
    
    private BufferedImage m_image;
    private Graphics      m_graphics;
    private int           m_width;
    private int           m_height;
    
    Vector nodes;
    XMLEditor xmlED;
    
    /** Creates a new instance of DrawingMain */
    public DrawingMain(XMLEditor xmlED, int width, int height) {
        m_width = width;
        m_height = height;
        m_image = new BufferedImage(m_width, m_height, BufferedImage.TYPE_BYTE_GRAY);
        m_graphics = m_image.getGraphics();
        nodes = new Vector();
        this.xmlED = xmlED;
        this.add(new JScrollPane());
    }
    
    public void clear() {
        m_graphics.setColor(Color.white);
        m_graphics.fillRect(0, 0, m_width, m_height);
    }
    
    public void dispose() {
        m_graphics.dispose();
    }
    
    public Graphics getGraphics() {
        return m_graphics;
    }
    
    public int getWidth() {
        return m_width;
    }
    
    public int getHeight() {
        return m_height;
    }
    
    public BufferedImage getImage() {
        return m_image;
    }
    
    public void drawPoint(Point pt, Color color) {
        m_graphics.setColor(color);
        m_graphics.drawLine(pt.x, pt.y, pt.x, pt.y);
    }
    
    public void drawLine(Point pt1, Point pt2, Color color) {
        m_graphics.setColor(color);
        m_graphics.drawLine(pt1.x, pt1.y, pt2.x, pt2.y);
    }
    
    public void drawCircle(Point pt, int radius, Color color) {
        m_graphics.setColor(color);
        m_graphics.fillOval(pt.x - (radius/2), pt.y - (radius/2), radius, radius);
    }
    
    public void XMLChanged(XMLChangeEvent e) {
        if (xmlED == null || e.getAction().equals("NEW_XML")) return;
        
        Element roleHierarchyPolicy = (Element)this.xmlED.DOM.getElementsByTagName("RoleHierarchyPolicy").item(0);
        
        NodeList roleSpecs = roleHierarchyPolicy.getElementsByTagName("RoleSpec");
        
        
    }
}