view java/src/uk/ac/qmul/eecs/ccmi/simpletemplate/SimpleShapeEdge.java @ 8:ea7885bd9bff tip

fixed bug : render solid line as dotted/dashed when moving the stylus from dotted/dashed to solid

/*  
 CCmI Editor - A Collaborative Cross-Modal Diagram Editing Tool
  
 Copyright (C) 2011  Queen Mary University of London (http://ccmi.eecs.qmul.ac.uk/)

 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 3 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, see <http://www.gnu.org/licenses/>.
*/  

package uk.ac.qmul.eecs.ccmi.simpletemplate;

import java.awt.Graphics2D;
import java.awt.Stroke;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import uk.ac.qmul.eecs.ccmi.diagrammodel.DiagramNode;
import uk.ac.qmul.eecs.ccmi.gui.DiagramEventSource;
import uk.ac.qmul.eecs.ccmi.gui.Edge;
import uk.ac.qmul.eecs.ccmi.gui.GraphElement;
import uk.ac.qmul.eecs.ccmi.gui.LineStyle;
import uk.ac.qmul.eecs.ccmi.gui.Node;
import uk.ac.qmul.eecs.ccmi.gui.persistence.PersistenceManager;
import uk.ac.qmul.eecs.ccmi.sound.SoundFactory;

/**
 * An edge rendered as a straight, dotted or dashed line. The edge can have an arrow head 
 * at each end. Possible arrow heads are : 
 * <ul>
 * <li> Triangle
 * <li> Black Triangle
 * <li> V
 * <li> Half V
 * <li> Diamond
 * <li> Black Diamond
 * <li> Tail
 * </ul> 
 *
 */
@SuppressWarnings("serial")
public class SimpleShapeEdge extends Edge {

	public SimpleShapeEdge(String type, LineStyle style, ArrowHead[] heads, String[] availableEndDescriptions, int minAttachedNodes, int maxAttachedNodes) {
		super(type,availableEndDescriptions,minAttachedNodes,maxAttachedNodes,style);
		this.heads = heads;
		currentHeads = new HashMap<Node,ArrowHead>();
	}
	
	@Override
	public boolean removeNode(DiagramNode n, Object source){
		currentHeads.remove(n);
		return super.removeNode(n,source);
	}

	
	@Override
	public void draw(Graphics2D g2) {
		 Stroke oldStroke = g2.getStroke();
		 g2.setStroke(getStyle().getStroke());
		 
		 /* straight line  */
		 if(points.isEmpty()){
			 Line2D line = getSegment(getNodeAt(0),getNodeAt(1));
			 g2.draw(line);
			 
			 /* draw arrow heads if any */
			 ArrowHead h = currentHeads.get(getNodeAt(0));
			 if( h != null && h != ArrowHead.TAIL){
				 Line2D revLine = getSegment(getNodeAt(1),getNodeAt(0));
				 h.draw(g2, revLine.getP1(), revLine.getP2());
			 }
			 h = currentHeads.get(getNodeAt(1));
			 if( h != null && h != ArrowHead.TAIL){
				 h.draw(g2, line.getP1(), line.getP2());
			 }
			 
			 /* draw labels if any */
			 String label;
			 if((label = getEndLabel(getNodeAt(0))) != null){
				 EdgeDrawSupport.drawString(g2, line.getP2(), line.getP1(), currentHeads.get(getNodeAt(0)), label, false);
			 }
			 if((label = getEndLabel(getNodeAt(1))) != null){
				 EdgeDrawSupport.drawString(g2, line.getP1(), line.getP2(), currentHeads.get(getNodeAt(1)), label, false);
			 }
			 
			 /* draw name if any */
			 if(!getName().isEmpty()){
				 EdgeDrawSupport.drawString(g2, line.getP2(), line.getP1(), null, getName(), true);
			 }
			 if(!"".equals(getNotes()))
				 EdgeDrawSupport.drawMarker(g2,line.getP1(),line.getP2());
		 }else{
			 /* edge with inner points: it can be a multiended(eventually bended) edge or a straight bended edge */
			 
			 /* arrow and labels are drawn in the same way in either case */
			 for(InnerPoint p : points){
				 for(GraphElement ge : p.getNeighbours()){
					 g2.draw(getSegment(p,ge));
					 if(ge instanceof Node){ // this is the inner point which is connected to a Node 
						/* draw arrow if any */
						ArrowHead h = currentHeads.get((Node)ge);
						if(h != null && h != ArrowHead.TAIL){
							Line2D line = getSegment(p,ge);
							h.draw(g2, line.getP1() , line.getP2());
						}
						
						/* draw label if any */
						String label = getEndLabel((Node)ge);
						if(label != null){
							Line2D line = getSegment(p,ge);
							EdgeDrawSupport.drawString(g2, line.getP1(), line.getP2(), currentHeads.get((Node)ge), label, false);
						}
					 }
				 }
				 p.draw(g2);
			 }
			 /* name is drawn differently : 
			  * for multiended edges name is drawn on the master inner point
			  * for two ends bended name is drawn in (about) the middle point of the edge 
			  */
			 
			 if(masterInnerPoint != null){/* multiended edge  */
				 Rectangle2D bounds = masterInnerPoint.getBounds();
				 Point2D p = new Point2D.Double(bounds.getCenterX() - 1,bounds.getCenterY());
				 Point2D q = new Point2D.Double(bounds.getCenterX() + 1,bounds.getCenterY());
				 if(!getName().isEmpty())
					 EdgeDrawSupport.drawString(g2, p, q, null, getName(), true);
				 if(!"".equals(getNotes()))
					 EdgeDrawSupport.drawMarker(g2,p,q);
			 }else{
			 /* straight edge which has been bended */ 
				 GraphElement ge1 = getNodeAt(0);
				 GraphElement ge2 = getNodeAt(1);
				 InnerPoint c1 = null;
				 InnerPoint c2 = null;
					 
				 for(InnerPoint innp : points){
					 if(innp.getNeighbours().contains(ge1)){
						 c1 = innp;
					 }
					 if(innp.getNeighbours().contains(ge2)){
						 c2 = innp;
					 }
				 }
				 
				 /* draw name if any */
				 if(!getName().isEmpty()){
					 /* we only have two nodes but the edge has been bended */
					 while((c1 != c2)&&(!c2.getNeighbours().contains(c1))){
						 if(c1.getNeighbours().get(0) == ge1){
							 ge1 = c1;
							 c1 = (InnerPoint)c1.getNeighbours().get(1);
						 }
						 else{
							 ge1 = c1;
							 c1 = (InnerPoint)c1.getNeighbours().get(0);
						 }
						 if(c2.getNeighbours().get(0) == ge2){
							 ge2 = c2;
							 c2 = (InnerPoint)c2.getNeighbours().get(1);
						 }
						 else{
							 ge2 = c2;
							 c2 = (InnerPoint)c2.getNeighbours().get(0);
						 }
					 }
					 
					 Point2D p = new Point2D.Double();
					 Point2D q = new Point2D.Double();
					 if(c1 == c2){
						 Rectangle2D bounds = c1.getBounds();
						 p.setLocation( bounds.getCenterX() - 1,bounds.getCenterY());
						 q.setLocation(  bounds.getCenterX() + 1,bounds.getCenterY());
					 }else{
						 Rectangle2D bounds = c1.getBounds();
						 p.setLocation( bounds.getCenterX(),bounds.getCenterY());
						 bounds = c2.getBounds();
						 q.setLocation(bounds.getCenterX(),bounds.getCenterY());
						 
					 }
					 if(!getName().isEmpty())
						 EdgeDrawSupport.drawString(g2, p, q, null, getName(), true);
					 if(!"".equals(getNotes()))
						 EdgeDrawSupport.drawMarker(g2,p,q);
				 }
			 }
		 }
		 g2.setStroke(oldStroke);
	}
	
	public Rectangle2D getBounds() {
		if(points.isEmpty()){
			return getSegment(getNodeAt(0), getNodeAt(1)).getBounds2D();
		}else{
			Rectangle2D bounds = points.get(0).getBounds();
			for(InnerPoint p : points){
				for(GraphElement ge : p.getNeighbours())
					bounds.add(getSegment(p,ge).getBounds2D());
			}
			return bounds;
		}
	}
	
	public ArrowHead[] getHeads() {
		return heads;
	}
	
	@Override
	public InputStream getSound(){
		switch(getStyle()){
		case Dashed : return dashedSound;
		case Dotted : return dottedSound;
		default : return straightSound;
		}
	}
	
	@Override
	 public void setEndDescription(DiagramNode diagramNode, int index, Object source){
		Node n = (Node)diagramNode;
		if(index == NO_END_DESCRIPTION_INDEX){
			 currentHeads.remove(n);
			 super.setEndDescription(n, index,source);
		 }else{
			 ArrowHead h = heads[index];
			 currentHeads.put(n, h);
			 super.setEndDescription(n, index,source);
		 }
	}
	
	@Override
	public void encode(Document doc, Element parent, List<Node> nodes){
		super.encode(doc, parent, nodes);
		/* add the head attribute to the NODE tag */
		NodeList nodeTagList = parent.getElementsByTagName(PersistenceManager.NODE);
		for(int i = 0 ; i< nodeTagList.getLength(); i++){
			Element nodeTag = (Element)nodeTagList.item(i);
			String nodeIdAsString = nodeTag.getAttribute(PersistenceManager.ID);
			long nodeId = Long.parseLong(nodeIdAsString);
			Node node = null;
			/* find the node with the id of the tag */
			for(Node n : nodes)
				if(n.getId() == nodeId){
					node = n;
					break;
				}
			String head = (currentHeads.get(node) == null) ? "" : currentHeads.get(node).toString();
			nodeTag.setAttribute(SimpleShapePrototypePersistenceDelegate.HEAD, head );
		}
	}
	
	@Override
	public void decode(Document doc, Element edgeTag, Map<String,Node> nodesId) throws IOException{
		super.decode(doc, edgeTag, nodesId);
		NodeList nodeList = edgeTag.getElementsByTagName(PersistenceManager.NODE);
		for(int i=0; i<nodeList.getLength(); i++){
			Element nodeTag = (Element)nodeList.item(i);
			String id = nodeTag.getAttribute(PersistenceManager.ID);
			if(id.isEmpty()) 
				throw new IOException();
			String head = nodeTag.getAttribute(SimpleShapePrototypePersistenceDelegate.HEAD);
			if(!head.isEmpty()){
				ArrowHead headShape = null;
				try{
					headShape = ArrowHead.getArrowHeadFromString(head);
				}catch(IOException e){
					throw e;
				}
				currentHeads.put(nodesId.get(id), headShape);
				int headDescriptionIndex = Edge.NO_END_DESCRIPTION_INDEX;
				for(int j=0; j<heads.length;j++){
					if(heads[j].equals(headShape)){
						headDescriptionIndex = j;
						break;
					}
				}
				setEndDescription(nodesId.get(id),headDescriptionIndex,DiagramEventSource.PERS);
			}
		}
	}
	
	@Override
	public Object clone(){
		return new SimpleShapeEdge(getType(), getStyle(), heads, getAvailableEndDescriptions(), getMinAttachedNodes(), getMaxAttachedNodes() );
	}
	
	

	private ArrowHead[] heads;	
	private Map<Node,ArrowHead> currentHeads;
	private static InputStream straightSound;
	private static InputStream dottedSound;
	private static InputStream dashedSound;
	
	static{
		Class<SimpleShapeEdge> c = SimpleShapeEdge.class; 
		straightSound = c.getResourceAsStream("audio/straightLine.mp3");
		dottedSound = c.getResourceAsStream("audio/dashedLine.mp3");
		dashedSound = c.getResourceAsStream("audio/dottedLine.mp3");
		SoundFactory.getInstance().loadSound(straightSound);
		SoundFactory.getInstance().loadSound(dottedSound);
		SoundFactory.getInstance().loadSound(dashedSound);
	}
}