svgellipse.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.apache.batik.util.*;
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 fr.itris.glips.svgeditor.resources.*;

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

	/**
	 * the reference of an object of this class
	 */
	private final SVGEllipse svgEllipse=this;
	
	/**
	 * the action listener used to draw the ellipse
	 */
	private EllipseActionListener ellipseAction=null;
	
	/**
	 * used to convert numbers into a string
	 */
	private DecimalFormat format;
	
	/**
	 * the constructor of the class
	 * @param editor the editor
	 */
	public SVGEllipse(SVGEditor editor) {
		super(editor);
		
		ids.put("id","ellipse");
		ids.put("idmenuitem","Ellipse");
		
		//gets the labels from the resources
		ResourceBundle bundle=SVGEditor.getBundle();
		
		if(bundle!=null){
		    
			try{
				labels.put("label", bundle.getString("shapeellipselabel"));
				labels.put("undoredocreate", bundle.getString("shapeellipseundoredocreate"));
				labels.put("undoredotranslate", bundle.getString("shapeundoredotranslate"));
				labels.put("undoredoresize", bundle.getString("shapeellipseundoredoresize"));
				labels.put("undoredorotate", bundle.getString("shapeellipseundoredorotate"));
				labels.put("helpcreate", bundle.getString("shapeellipsehelpcreate"));
			}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);
		ellipseAction=new EllipseActionListener();
		
		//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(ellipseAction);
		toolItem.addActionListener(ellipseAction);

		//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);
					toolItem.setEnabled(true);
					toolItem.setIcon(icon);
					
				}else{
				    
					menuitem.setEnabled(false);
					toolItem.setEnabled(false);
					toolItem.setIcon(disabledIcon);
				}
				
				ellipseAction.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 an ellipse
	 * @param frame the current SVGFrame
	 * @param bounds the bounds of the element
	 */
	protected void drawEllipse(SVGFrame frame, Rectangle2D.Double bounds){
		
		if(frame!=null && bounds!=null){
			
			Document doc=frame.getScrollPane().getSVGCanvas().getDocument();
			
			if(getSVGEditor().getSVGSelection()!=null && doc!=null){
			    
				final Element parent=getSVGEditor().getSVGSelection().getCurrentParentElement(frame);
				
				if(parent!=null){
			
					//creates the ellipse
					Element ellipse = doc.createElementNS(doc.getDocumentElement().getNamespaceURI(),"ellipse");
					ellipse.setAttributeNS(null,"cx", format.format(bounds.x+bounds.width/2));
					ellipse.setAttributeNS(null,"cy", format.format(bounds.y+bounds.height/2));
					ellipse.setAttributeNS(null,"rx", format.format(bounds.width/2));
					ellipse.setAttributeNS(null,"ry", format.format(bounds.height/2));
					String colorString=SVGEditor.getColorChooser().getColorString(SVGColorManager.getCurrentColor());
					ellipse.setAttributeNS(null, "style", "fill:".concat(colorString.concat(";")));
			
					//sets that the svg has been modified
					frame.setModified(true);
			
					//creates final variables
					final Node fellipse=ellipse;

					//attaches the ellipse to the svg root element
					parent.appendChild(fellipse);
			
					//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(fellipse);
							}

							public void redo(){
							    
							    parent.appendChild(fellipse);
							}
						};
				
						SVGSelection selection=getSVGEditor().getSVGSelection();
				
						if(selection!=null){
						    
							selection.deselectAll(frame, false, true);
							selection.addUndoRedoAction(frame, action);
							selection.handleNodeSelection(frame, ellipse);
							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 ellipse will be if the user releases the mouse button
	 * @param frame the current SVGFrame
	 * @param g a graphics element
	 * @param bounds the bounds of the element
	 */
	protected void drawGhost(SVGFrame frame, Graphics2D g, Rectangle2D.Double bounds){
		
		if(frame!=null && g!=null && bounds!=null){
			
		    g=(Graphics2D)g.create();
		    
			//draws the new awt ellipse to be displayed
			g.setColor(GHOST_COLOR);
			g.setXORMode(Color.white);
			g.drawOval((int)bounds.x, (int)bounds.y, (int)bounds.width, (int)bounds.height);

			Rectangle2D.Double scaleBounds=frame.getScaledRectangle(bounds, true);
			frame.getStateBar().setSVGW(SVGEditor.getDisplayFormat().format(scaleBounds.width));
			frame.getStateBar().setSVGH(SVGEditor.getDisplayFormat().format(scaleBounds.height));
			g.dispose();
		}		
	}
	
	/**
	 * used to remove the listener added to draw an ellipse when the user clicks on the menu item
	 */
	public void cancelActions(){
	    
		if(ellipseAction!=null){
		    
			toolItem.removeActionListener(ellipseAction);
			toolItem.setSelected(false);
			toolItem.addActionListener(ellipseAction);
			
		    ellipseAction.cancelActions();
		}
	}
	
	/**
	 * 
	 * @author Jordi SUC
	 * the class allowing to get the position and size of the future drawn ellipse 
	 */
	protected class EllipseActionListener implements ActionListener{

		/**
		 * the hashtable associating a frame to its mouse adapter
		 */
		private final Hashtable mouseAdapterFrames=new Hashtable();
		
		/**
		 * an instance of this class
		 */