EventHandler.java

package edu.stanford.hci.r3.events;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import edu.stanford.hci.r3.Application;
import edu.stanford.hci.r3.paper.Region;
import edu.stanford.hci.r3.paper.Sheet;
import edu.stanford.hci.r3.tools.debug.DebuggingEnvironment;
import edu.stanford.hci.r3.tools.debug.Utils;
import edu.stanford.hci.r3.util.DebugUtils;

public abstract class EventHandler {

        protected List<Region> parentRegions = new ArrayList<Region>();

        public void addParentRegion(Region r) {
                parentRegions.add(r);
        }

        public List<Region> getParentRegions() {
                return parentRegions;
        }

        public abstract void handleEvent(PenEvent event);

        public void showMe(String message) {
                
                for (Region r : parentRegions) {
                        // DebugUtils.println(r);
                        
                        Sheet s = r.getParentSheet();
                        Application a = s.getParentApplication();
                        DebugUtils.println("Hosted in: " + a.getName());
                        
                        Thread currThread = Thread.currentThread();
                        StackTraceElement[] trace = currThread.getStackTrace();
                        String code = null;
                        for (StackTraceElement ste : trace) {
                                String method = ste.getMethodName();
                                String className = ste.getClassName(); 
                                if (method.equals("showMe") || className.startsWith("java."))
                                        continue;
                                String filename = "src/"+className.replace('.', '/');
                                int innerclass = filename.indexOf('$');
                                if (innerclass>=0)
                                        filename = filename.substring(0,innerclass);
                                filename += ".java";
                                try {
                                        int line = ste.getLineNumber()-1;
                                        List<String> lines = Utils.getLines(new File(filename));
                                        code = filename+":"+ste.getLineNumber()+"\n";
                                        for (int i=Math.max(0, line-3); 
                                                         i<Math.min(line+4, lines.size()-1); 
                                                         i++)
                                                code += (i+1)+": "+lines.get(i)+"\n";
                                        
                                } catch (IOException ex) {
                                        ex.printStackTrace();
                                }
                                break;
                        }
                        
                        DebuggingEnvironment d = a.getDebuggingEnvironment();
                        if (d != null) {
                                d.visualize(message, r, code);
                        }
                }
        }

        public abstract String toString();

}

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