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SVG Salamander - tools and components for SVG rendering, manipulation and animation
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/*
 * SVGDiagram.java
 *
 *
 *  The Salamander Project - 2D and 3D graphics libraries in Java
 *  Copyright (C) 2004 Mark McKay
 *
 *  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
 *
 *  Mark McKay can be contacted at [email protected].  Salamander and other
 *  projects can be found at http://www.kitfox.com
 *
 * Created on February 18, 2004, 5:04 PM
 */

package com.kitfox.svg;

import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.Serializable;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;


/**
 * Top level structure in an SVG tree.
 *
 * @author Mark McKay
 * @author Mark McKay
 */
public class SVGDiagram implements Serializable
{
    public static final long serialVersionUID = 0;
    
    //Indexes elements within this SVG diagram
    final HashMap idMap = new HashMap();

    SVGRoot root;
    final SVGUniverse universe;

    /**
     * This is used by the SVGRoot to determine the width of the 
     */
    private Rectangle deviceViewport = new Rectangle(100, 100);

    /**
     * If true, no attempt will be made to discard geometry based on it being
     * out of bounds.  This trades potentially drawing many out of bounds
     * shapes with having to recalculate bounding boxes every animation iteration.
     */
    protected boolean ignoreClipHeuristic = false;

    /**
     * URL which uniquely identifies this document
     */
//    final URI docRoot;

    /**
     * URI that uniquely identifies this document.  Also used to resolve
     * relative urls.  Default base for document.
     */
    final URI xmlBase;

    /** Creates a new instance of SVGDiagram */
    public SVGDiagram(URI xmlBase, SVGUniverse universe)
    {
        this.universe = universe;
//        this.docRoot = docRoot;
        this.xmlBase = xmlBase;
    }

    /**
     * Draws this diagram to the passed graphics context
     */
    public void render(Graphics2D g) throws SVGException
    {
        root.render(g);
    }
    
    /**
     * Searches thorough the scene graph for all RenderableElements that have
     * shapes that contain the passed point.
     * 
     * For every shape which contains the pick point, a List containing the
     * path to the node is added to the return list.  That is, the result of
     * SVGElement.getPath() is added for each entry.
     *
     * @return the passed in list
     */
    public List pick(Point2D point, List retVec) throws SVGException
    {
        return pick(point, false, retVec);
    }
    
    public List pick(Point2D point, boolean boundingBox, List retVec) throws SVGException
    {
        if (retVec == null)
        {
            retVec = new ArrayList();
        }
        
        root.pick(point, boundingBox, retVec);
        
        return retVec;
    }

    public List pick(Rectangle2D pickArea, List retVec) throws SVGException
    {
        return pick(pickArea, false, retVec);
    }
    
    public List pick(Rectangle2D pickArea, boolean boundingBox, List retVec) throws SVGException
    {
        if (retVec == null)
        {
            retVec = new ArrayList();
        }
        
        root.pick(pickArea, new AffineTransform(), boundingBox, retVec);
        
        return retVec;
    }

    public SVGUniverse getUniverse()
    {
        return universe;
    }

    public URI getXMLBase()
    {
        return xmlBase;
    }

//    public URL getDocRoot()
//    {
//        return docRoot;
//    }

    public float getWidth()
    {
        if (root == null) return 0;
        return root.getDeviceWidth();
    }
    
    public float getHeight()
    {
        if (root == null) return 0;
        return root.getDeviceHeight();
    }
    
    /**
     * Returns the viewing rectangle of this diagram in device coordinates.
     */
    public Rectangle2D getViewRect(Rectangle2D rect)
    {
        if (root != null) return root.getDeviceRect(rect);
        return rect;
    }

    public Rectangle2D getViewRect()
    {
        return getViewRect(new Rectangle2D.Double());
    }

    public SVGElement getElement(String name)
    {
        return (SVGElement)idMap.get(name);
    }

    public void setElement(String name, SVGElement node)
    {
        idMap.put(name, node);
    }

    public void removeElement(String name)
    {
        idMap.remove(name);
    }

    public SVGRoot getRoot()
    {
        return root;
    }

    public void setRoot(SVGRoot root)
    {
        this.root = root;
    }

    public boolean ignoringClipHeuristic() { return ignoreClipHeuristic; }

    public void setIgnoringClipHeuristic(boolean ignoreClipHeuristic) { this.ignoreClipHeuristic = ignoreClipHeuristic; }

    /**
     * Updates all attributes in this diagram associated with a time event.
     * Ie, all attributes with track information.
     */
    public void updateTime(double curTime) throws SVGException
    {
        if (root == null) return;
        root.updateTime(curTime);
    }

    public Rectangle getDeviceViewport()
    {
        return deviceViewport;
    }

    /**
     * Sets the dimensions of the device being rendered into.  This is used by
     * SVGRoot when its x, y, width or height parameters are specified as
     * percentages.
     */
    public void setDeviceViewport(Rectangle deviceViewport)
    {
        this.deviceViewport.setBounds(deviceViewport);
        if (root != null)
        {
            try
            {
                root.build();
            } catch (SVGException ex)
            {
                ex.printStackTrace();
            }
        }
    }
}