svgpolyline.java

完全基于java开发的svg矢量绘图工具

/*
 * Created on 10 mai 2004
 * 
 =============================================
                   GNU LESSER GENERAL PUBLIC LICENSE Version 2.1
 =============================================
GLIPS Graffiti Editor, a SVG Editor
Copyright (C) 2003 Jordi SUC, Philippe Gil, SARL ITRIS

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Contact : [e-mail]; [e-mail]

 =============================================
 */
package fr.itris.glips.svgeditor.shape;

import fr.itris.glips.svgeditor.*;
import fr.itris.glips.svgeditor.canvas.*;
import fr.itris.glips.svgeditor.selection.*;
import fr.itris.glips.svgeditor.undoredo.*;
import org.w3c.dom.svg.*;
import org.w3c.dom.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.*;
import java.text.*;
import java.util.*;
import org.apache.batik.bridge.*;
import org.apache.batik.gvt.*;
import fr.itris.glips.svgeditor.resources.*;

/**
 * @author Jordi SUC
 * the class that allows to add, select,modify the properties, delete, transform a polyline on the canvas
 */
public class SVGPolyline extends SVGShape{

	/**
	 * the reference of an object of this class
	 */
	private final SVGPolyline svgPolyline=this;
	
	/**
	 * the format
	 */
	private DecimalFormat format=null;
	
	/**
	 * the action listener used to draw the polyline
	 */
	private PolylineActionListener polylineAction=null;
	
	/**
	 * the constructor of the class
	 * @param editor the editor
	 */
	public SVGPolyline(SVGEditor editor) {
	    
		super(editor);
		
		ids.put("id","polyline");
		ids.put("idmenuitem","Polyline");
		
		//gets the labels from the resources
		ResourceBundle bundle=SVGEditor.getBundle();
		
		if(bundle!=null){
		    
			try{
				labels.put("label", bundle.getString("shapepolylinelabel"));
				labels.put("undoredocreate", bundle.getString("shapepolylineundoredocreate"));
				labels.put("undoredotranslate", bundle.getString("shapeundoredotranslate"));
				labels.put("undoredoresize", bundle.getString("shapepolylineundoredoresize"));
				labels.put("undoredomodifypoint", bundle.getString("shapepolylineundoredomodifypoint"));
				labels.put("undoredorotate", bundle.getString("shapepolylineundoredorotate"));
				labels.put("helpcreate", bundle.getString("shapepolylinehelpcreate"));
			}catch (Exception ex){}
		}
		
		DecimalFormatSymbols symbols=new DecimalFormatSymbols();
		symbols.setDecimalSeparator('.');
		format=new DecimalFormat("######.#",symbols);
		
		//the icons
		icon=SVGResource.getIcon((String)ids.get("idmenuitem"), false);
		disabledIcon=SVGResource.getIcon((String)ids.get("idmenuitem"), true);
		
		//the menu item
		menuitem=new JMenuItem((String)labels.get("label"), icon);
		menuitem.setDisabledIcon(disabledIcon);
		menuitem.setEnabled(false);
		polylineAction=new PolylineActionListener();
		
		//the toggle button
		toolItem=new JToggleButton(disabledIcon);
		toolItem.setEnabled(false);
		toolItem.setToolTipText((String)labels.get("label"));
		
		//adds a listener to the menu item and the toggle button
		menuitem.addActionListener(polylineAction);
		toolItem.addActionListener(polylineAction);
		
		//a listener that listens to the changes of the SVGFrames
		final ActionListener svgframeListener=new ActionListener(){

			public void actionPerformed(ActionEvent e) {
				
				if(getSVGEditor().getFrameManager().getFrameNumber()>0){
				    
					menuitem.setEnabled(true);
					//menuitem.setIcon(icon);
					toolItem.setEnabled(true);
					toolItem.setIcon(icon);

				}else{
				    
					menuitem.setEnabled(false);
					//menuitem.setIcon(disabledIcon);
					toolItem.setEnabled(false);
					toolItem.setIcon(disabledIcon);
				}
				
				polylineAction.reset();
			}
		};
		
		//adds the SVGFrame change listener
		editor.getFrameManager().addSVGFrameChangedListener(svgframeListener);
	}
	
	/**
	 * @return a map associating a menu item id to its menu item object
	 */
	public Hashtable getMenuItems(){
		
		Hashtable menuItems=new Hashtable();
		menuItems.put((String)ids.get("idmenuitem"), menuitem);
		
		return menuItems;
	}
	
	/**
	 * @return a map associating a tool item id to its tool item object
	 */
	public Hashtable getToolItems(){
		
		Hashtable toolItems=new Hashtable();
		toolItems.put((String)ids.get("idmenuitem"), toolItem);
		
		return toolItems;
	}

	/**
	 * draws a polyline
	 * @param frame the current SVGFrame
	 * @param points the array of points
	 */
	protected void drawPolyline(SVGFrame frame, Point2D.Double[] points){

		if(frame!=null && points!=null && points.length>1){
			
			Document doc=frame.getScrollPane().getSVGCanvas().getDocument();
			
			if(getSVGEditor().getSVGSelection()!=null && doc!=null){
			    
				final Element parent=getSVGEditor().getSVGSelection().getCurrentParentElement(frame);
				
				if(parent!=null){

					String value="";

					for(int i=0;i<points.length;i++){
					    
						value=value.concat(format.format(points[i].getX())+","+format.format(points[i].getY())+" ");
					}
			
					//creates the polyline
					final Element polyline=doc.createElementNS(doc.getDocumentElement().getNamespaceURI(),"polyline");

					polyline.setAttributeNS(null,"points",value);
					String colorString=getSVGEditor().getColorChooser().getColorString(getSVGEditor().getSVGColorManager().getCurrentColor());
					polyline.setAttributeNS(null, "style", "stroke:".concat(colorString.concat(";fill:none;")));
			
					//sets that the svg has been modified
					frame.setModified(true);
			
					//creates final variables
					final SVGFrame fframe=frame;

					// attaches the element to the svg parent element	
					parent.appendChild(polyline);
			
					//create the undo/redo action and insert it into the undo/redo stack
					if(getSVGEditor().getUndoRedo()!=null){

						SVGUndoRedoAction action=new SVGUndoRedoAction((String)labels.get("undoredocreate")){

							public void undo(){
							    
							    parent.removeChild(polyline);
							}
							
							public void redo(){
							    
							    parent.appendChild(polyline);
							}
						};
				
						SVGSelection selection=getSVGEditor().getSVGSelection();
				
						if(selection!=null){
						    
							selection.deselectAll(frame, false, true);
							selection.addUndoRedoAction(frame, action);
							selection.handleNodeSelection(frame, polyline);
							selection.addUndoRedoAction(frame, new SVGUndoRedoAction((String)labels.get("undoredocreate")){});
							selection.refreshSelection(frame);
					
						}else{
						    
							SVGUndoRedoActionList actionlist=new SVGUndoRedoActionList((String)labels.get("undoredocreate"));
							actionlist.add(action);
							getSVGEditor().getUndoRedo().addActionList(frame, actionlist);
						}
					}
				}
			}
		}
	}
	
	/**
	 * draws what the polyline will be if the user double clicks
	 * @param frame the current SVGFrame
	 * @param g the graphics element
	 * @param points an array of points
	 */
	protected void drawGhost(SVGFrame frame, Graphics2D g, Point2D.Double[] points){
		
		if(frame!=null && points!=null && points.length>1 && g!=null){
		    
		    g=(Graphics2D)g.create();
		    
			//draws the new awt polyline to be displayed		
			g.setColor(GHOST_COLOR);
			g.setXORMode(Color.white);

			for(int i=1;i<points.length;i++){
			    
				g.drawLine((int)points[i-1].x, (int)points[i-1].y, (int)points[i].x, (int)points[i].y);
			}
			
			g.dispose();
		}		
	}
	
	/**
	 * gets the nexts level after the given selection level
	 * @param type a selection level
	 * @return the next selection level
	 */
	public String getNextLevel(String type){
	    
		if(type!=null){
		    
			if(type.equals("level1")){
			    
			    return "level2";
			    
			}else if(type.equals("level2")){
			    
			    return "level3";
			    
			}else if(type.equals("level3")){
			    
			    return "level1";
			}
		}
		
		return "level1";
	}
	
	/**
	 * draws the selection for the polyline
	 * @param frame the current SVGFrame
	 * @param graphics the graphics 
	 * @param nde the node to be selected
	 * @return the list of the selection squares
	 */
	protected LinkedList drawModifyPointsSelection(SVGFrame frame, Graphics graphics, Node nde){

		LinkedList squarelist=new LinkedList();
		Element node=(Element)nde;
		Graphics2D g=(Graphics2D)graphics;
		
		if(frame!=null && g!=null && node!=null){
			
			int sqd=5;
			String pts=node.getAttributeNS(null,"points");
			
			if(pts!=null && !pts.equals("")){
			    
				double px=0, py=0;
				//gets the coordinates of the points
				Point2D.Double[] points=null;
				ArrayList list=new ArrayList();
				int i=0;
				
				pts=pts.replaceAll("[,]"," ");
				
				//removes the first space characters from the string
				if(!pts.equals("") && pts.charAt(0)==' '){
				    
				    pts=pts.replaceFirst("[\\s]+","");
				}
				 
				while(! pts.equals("")){
				    
					try{
						px=new Double(pts.substring(0,pts.indexOf(' '))).doubleValue();
						pts=pts.substring(pts.indexOf(' ')+1,pts.length());
						
						if(!pts.equals("") && pts.charAt(0)==' '){
						    
						    pts=pts.replaceFirst("[\\s]+","");
						}
						
						py=new Double(pts.substring(0,pts.indexOf(' '))).doubleValue();
						pts=pts.substring(pts.indexOf(' ')+1,pts.length());
						
						if(!pts.equals("") && pts.charAt(0)==' '){
						    
						    pts=pts.replaceFirst("[\\s]+","");
						}
						
						list.add(new Point2D.Double(px, py));
					}catch (Exception ex){break;}
				}
				
				//the values of the coordinates of the points
				points=new Point2D.Double[list.size()];
				
				for(i=0;i<list.size();i++){
				    
				    points[i]=(Point2D.Double)list.get(i);
				}
				
				if(points!=null && points.length>0){
				    
					//computes the transformed points
					BridgeContext ctxt=frame.getScrollPane().getSVGCanvas().getBridgeContext();
					
					if(ctxt!=null){
					    
						GraphicsNode gnode=ctxt.getGraphicsNode((Element)node);
						
						if(gnode!=null){
						    
							AffineTransform af=new AffineTransform();
							try{af.preConcatenate(gnode.getTransform());}catch (Exception ex){}
							try{af.transform(points,0,points,0,points.length);}catch (Exception e){}
						}
					}