svgselectionmanager.java

完全基于java开发的svg矢量绘图工具

/*
 * Created on 7 avr. 2004
 *
 =============================================
                   GNU LESSER GENERAL PUBLIC LICENSE Version 2.1
 =============================================
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.selection;

import java.awt.*;
import java.awt.geom.*;
import java.util.*;
import javax.swing.*;
import org.w3c.dom.*;
import fr.itris.glips.svgeditor.*;
import fr.itris.glips.svgeditor.canvas.*;
import fr.itris.glips.svgeditor.shape.*;
import fr.itris.glips.svgeditor.undoredo.*;

/**
 * @author jordi
 * the class handling the selections within a canvas
 * 
 * @author Jordi SUC
 */
public class SVGSelectionManager{
    
    /**
     * the selection module
     */
    private SVGSelection selection=null;
    
    /**
     * the colors used to draw the area out of a parent group node
     */
    private final Color outOfParentAreaColor=new Color(100, 100, 100, 50), outOfParentAreaBorderColor=new Color(100, 100, 100);
    
    /**
     * the frame linked with this selection manager
     */
    private SVGFrame frame=null;
    
    /**
     * the undo/redo list that will be added to the undo/redo stack
     */
    private SVGUndoRedoActionList undoRedoList=null;
    
    /**
     * the map associating the name of a module to a linked list of nodes that are handled by the module
     */
    private Map selectedItemsByModule=new Hashtable();
    
    /**
     * the map of the selected nodes associating a node to its type
     */
    private Map currentSelectionType=new LinkedHashMap();
    
    /**
     * the map associating a node to the linked list of the selection square objects
     */
    private final Map selectionSquares=new Hashtable();
    
    /**
     * the list of the locked nodes
     */
    private LinkedList lockedNodes=new LinkedList();
    
    /**
     * the boolean used to refresh the selection
     */
    private boolean shouldRefresh=false;
    
    /**
     * the current cursor
     */
    private Cursor currentCursor=null;

    /**
     * the selection listener
     */
    private SVGSelectionListener selectionListener=null;
    
    /**
     * the parent of the nodes that could be selected
     */
    private Element parentElement=null;
    
    /**
     * an instance of this class
     */
    private SVGSelectionManager selectionManager=this;
    
    /**
     * the refresh manager
     */
    private Thread refreshManager=null;
    
    /**
     * the paint listener for the selection
     */
    private CanvasPaintListener paintListener=null;
    
    /**
     * whether the refresh manager should keep on running
     */
    private boolean keepRunning=true;
    
    /**
     * the constructor of the class
     * @param selection the selection module
     * @param frame a frame
     */
    public SVGSelectionManager(SVGSelection selection, SVGFrame frame){

        this.selection=selection;
        this.frame=frame;
        
        //the parent
        Document doc=frame.getScrollPane().getSVGCanvas().getDocument();
        
        if(doc!=null){
            
            parentElement=doc.getDocumentElement();
        }
        
        //adding the paint listener that will paint the area 
        paintListener=new CanvasPaintListener(){

            public void paintToBeDone(Graphics g) {

                Graphics2D g2=(Graphics2D)g;
                
                if(getParentElement()!=null && getParentElement().getNodeName().equals("g")){
                    
                    //the bounds of the parent element
                    Rectangle2D parentBounds=selectionManager.frame.getNodeGeometryBounds(getParentElement());
                    Rectangle2D.Double dparentBounds=new Rectangle2D.Double(parentBounds.getX(), parentBounds.getY(), parentBounds.getWidth(), parentBounds.getHeight()),
                    								scaledParentBounds=getSVGFrame().getScaledRectangle(dparentBounds, false);
                    
                    //the size of the canvas
                    Dimension canvasSize=selectionManager.frame.getScrollPane().getSVGCanvas().getScaledCanvasSize();
                    
                    //the area to be painted
                    Area area=new Area(new Rectangle(0, 0, canvasSize.width, canvasSize.height));
                    area.subtract(new Area(new Rectangle((int)scaledParentBounds.x, (int)scaledParentBounds.y, (int)scaledParentBounds.width, (int)scaledParentBounds.height)));
                    
                    //painting the area
                    g.setColor(outOfParentAreaColor);
                    g2.fill(area);
                    
                    g.setColor(outOfParentAreaBorderColor);
                    g2.draw(area);
                }
            }
        };
        
        frame.getScrollPane().getSVGCanvas().addLayerPaintListener(SVGCanvas.BOTTOM_LAYER, paintListener, false);
        
        //the mouse and key listeners
        selectionListener=new SVGSelectionListener(this);
        
        frame.getScrollPane().getSVGCanvas().addMouseListener(selectionListener);
        frame.getScrollPane().getSVGCanvas().addMouseMotionListener(selectionListener);
        frame.getScrollPane().getSVGCanvas().addKeyListener(selectionListener);
        
        //the refresh manager
        refreshManager=new Thread(){

        	@Override
            public void run() {

                while(keepRunning){

                    try{sleep(200);}catch (Exception ex){}

                    if(shouldRefresh){

					    SwingUtilities.invokeLater(new Runnable(){

	                        public void run() {

	    					    redrawSelectionMethod();
	                        }  
					    });

                        synchronized(this){shouldRefresh=false;}
                    }
                }
            }
        };

        refreshManager.start();
    }
    
    /**
     * disposes this selection manager
     */
    protected void dispose(){
        
        if(selectionListener!=null){

        	synchronized(this){
        		
        		keepRunning=false;
        	}

            frame.getScrollPane().getSVGCanvas().removeMouseListener(selectionListener);
            frame.getScrollPane().getSVGCanvas().removeMouseMotionListener(selectionListener);
            frame.getScrollPane().getSVGCanvas().removeKeyListener(selectionListener);
            
            selectedItemsByModule.clear();
            currentSelectionType.clear();
            selectionSquares.clear();
            lockedNodes.clear();
            
            if(undoRedoList!=null){
            	
            	undoRedoList.clear();
            }
        }
    }
    
    /**
     * @return whether an action is currently being done or not
     */
    public boolean isActing(){
        
        return selectionListener.isActing();
    }
    
    /**
     * @return the SVGFrame containing the canvas
     */
    protected SVGFrame getSVGFrame(){
        return frame;
    }

    /**
     * @return Returns the parentElement.
     */
    public Element getParentElement() {
        return parentElement;
    }

    /**
     * @return Returns the selection.
     */
    protected SVGSelection getSVGSelection() {
        return selection;
    }
    
    /**
     * sets the parent element
     * @param parentElement a parent element
     */
    public synchronized void setParentElement(Element parentElement){
        
        this.parentElement=parentElement;
    }
    
    /**
     * enters the group that is the single g selected node
     */
    public void enterGroup(){
        
        LinkedList currentSelection=new LinkedList(currentSelectionType.keySet());

        if(currentSelection.size()==1){
            
            final Element lastParent=getParentElement();
            
            //getting the selected g node
            Element currentParent=null;
            
            try{
                currentParent=(Element)currentSelection.getFirst();
            }catch (Exception ex){currentParent=null;}
            
            if(currentParent!=null){

                //sets the new parent
                setParentElement(currentParent);
                
                final Element newParentElement=currentParent;
                
                //adding the undo/redo action
                if(getSVGSelection().getSVGEditor().getUndoRedo()!=null){
                    
                    if(undoRedoList==null){
                        
                        undoRedoList=new SVGUndoRedoActionList(getSVGSelection().undoredogroupenter);
                    }
                    
                    //adding the undo/redo action
                    undoRedoList.addLast(new SVGUndoRedoAction(getSVGSelection().undoredogroupenter){

        	            public void undo() {
        	                
        	                setParentElement(lastParent);
        	                redrawSelection();
        	            }

                        public void redo() {
                            
                            setParentElement(newParentElement);
                            redrawSelection();
                        }
                    });
                    
                    undoRedoList.setName(getSVGSelection().undoredogroupenter);
                }

                //deselects all the nodes
                deselectAll(false, false);
                
                refreshSelection();
            }
        }
    }
    
    /**
     * enters the group that is the single g selected node
     */
    public void exitGroup(){

        final Element lastParent=getParentElement();
        
        if(lastParent!=null){
            
            //getting the parent element of the last parent element
            Element currentParent=null;
            
            try{
                currentParent=(Element)lastParent.getParentNode();
            }catch (Exception ex){}

            if(currentParent!=null){

                //sets the new parent
                setParentElement(currentParent);
                
                final Element newParentElement=currentParent;
                
                //adding the undo/redo action
                if(getSVGSelection().getSVGEditor().getUndoRedo()!=null){
                    
                    if(undoRedoList==null){
                        
                        undoRedoList=new SVGUndoRedoActionList(getSVGSelection().undoredogroupexit);
                    }
                    
                    //adding the undo/redo action
                    undoRedoList.addLast(new SVGUndoRedoAction(getSVGSelection().undoredogroupexit){

        	            public void undo() {
        	                
        	                setParentElement(lastParent);
        	                redrawSelection();
        	            }

                        public void redo() {
                            
                            setParentElement(newParentElement);
                            redrawSelection();
                        }
                    });
                    
                    undoRedoList.setName(getSVGSelection().undoredogroupexit);
                }
                
                //deselects all the nodes
                deselectAll(false, false);
                

                refreshSelection();
            }
        }
    }
    
    /**