VisClient/org/hfbk/vis/visnode/VisImage.java

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/*
 * Created on 15.04.2008
 *
 */
package org.hfbk.vis.visnode;


import java.awt.event.MouseEvent;

import org.dronus.gl.GLUtil;
import org.dronus.gl.Texture;
import org.dronus.graph.Node;
import org.hfbk.vis.ImageFetcher;
import org.lwjgl.opengl.GL11;
import org.lwjgl.util.vector.Vector3f;

public class VisImage extends VisNodeDraggable {

        final float SCALE=15f;
        
        Texture tex=null;
        ImageFetcher fetcher;
        
        String large;
        
        public VisImage(Node n, Vector3f position) {
                super(n, position);
                
                String imageURL=n.getSubNodeText("thumbnail");
                if (imageURL==null) imageURL=n.text;
                fetcher=new ImageFetcher(imageURL,true);
                
                large=n.text;
                if (large==null)
                        large=imageURL;
        }
        
        public void add(VisNode node) {}
        
        public VisImage(String imageUrl, String contextUrl, Vector3f position, boolean asThumbnail) {
                super(new Node(imageUrl), position);            
                url=contextUrl;
                fetcher=new ImageFetcher(imageUrl,asThumbnail);
                large=imageUrl;
        }


        void renderSelf() {
                if (tex!=null){
                        tex.render(); // apply texture
                
                        Vector3f pos=new Vector3f(GLUtil.getPosition());
                        //calculate fade away when viewer passes
                        float alpha=Math.max(Math.min(-pos.z/20,1),0);
                        GL11.glColor4f(1,1,1,alpha);
                                
                        GLUtil.renderQuad(-w/2,-h/2,w/2,h/2, tex.imagewidth, tex.imageheight);                  
                }else if (fetcher.pixels!=null){
                        tex=new Texture(fetcher.pixels, fetcher.width, fetcher.height, fetcher.pixelformat);
                        fetcher.free();//signal fetcher to release pixel data;
                        fetcher=null;
                        
                        w=tex.width; h=tex.height;
                        float scale=Math.max(w,h);
                        scale=SCALE/scale;
                        w*=scale; h*=scale;
                        radius=(float)Math.sqrt(w*w+h*h)/2;                             
                }
        }

        void handleEvent(VisMouseEvent evt) {
                super.handleEvent(evt);
                if (evt.getID()==MouseEvent.MOUSE_CLICKED){
                        
                        if (evt.getButton()==1)
                                if (getRoot() instanceof VisHUD) //we are a HUD slide 
                                        getRoot().remove(this);
                                else
                                        //      open a HUD slide
                                        getRoot().client.hud.add(new VisImage(large, url, new Vector3f(0,0,-20),false));
                        else if(evt.getButton()==3 && url!=null)
                                getRoot().fetch("spider", url, this);
                                
                }
        }
        
        public void close() {
                if (fetcher!=null) fetcher.free();
                super.close();
        }
}

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