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  1. JDK
  2. JDK-5018872

Browser is crashing when resizing Browserwindow and applet is scaling

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P3
    • Resolution: Cannot Reproduce
    • Affects Version/s: 1.4.2
    • Fix Version/s: None
    • Component/s: deploy
    • Labels:
    • Subcomponent:
    • CPU:
      x86
    • OS:
      windows_xp

      Description

      ) ? selectColor : (n.fixed ? fixedColor : nodeColor));
      int w = fm.stringWidth(n.lbl) + 10;
      int h = fm.getHeight() + 4;
      g.fillRect(x - w/2, y - h / 2, w, h);
      g.setColor(Color.black);
      g.drawRect(x - w/2, y - h / 2, w-1, h-1);
      g.drawString(n.lbl, x - (w-10)/2, (y - (h-4)/2) + fm.getAscent());
          }

          public synchronized void update(Graphics g) {
      Dimension d = getSize();
      if ((offscreen == null) || (d.width != offscreensize.width) || (d.height != offscreensize.height)) {
      offscreen = createImage(d.width, d.height);
      offscreensize = d;
      if (offgraphics != null) {
      offgraphics.dispose();
      }
      offgraphics = offscreen.getGraphics();
      offgraphics.setFont(getFont());
      }

      offgraphics.setColor(getBackground());
      offgraphics.fillRect(0, 0, d.width, d.height);
      for (int i = 0 ; i < nedges ; i++) {
      Edge e = edges[i];
      int x1 = (int)nodes[e.from].x;
      int y1 = (int)nodes[e.from].y;
      int x2 = (int)nodes[e.to].x;
      int y2 = (int)nodes[e.to].y;
      int len = (int)Math.abs(Math.sqrt((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2)) - e.len);
      offgraphics.setColor((len < 10) ? arcColor1 : (len < 20 ? arcColor2 : arcColor3)) ;
      offgraphics.drawLine(x1, y1, x2, y2);
      if (stress) {
      String lbl = String.valueOf(len);
      offgraphics.setColor(stressColor);
      offgraphics.drawString(lbl, x1 + (x2-x1)/2, y1 + (y2-y1)/2);
      offgraphics.setColor(edgeColor);
      }
      }

      FontMetrics fm = offgraphics.getFontMetrics();
      for (int i = 0 ; i < nnodes ; i++) {
      paintNode(offgraphics, nodes[i], fm);
      }
      g.drawImage(offscreen, 0, 0, null);
          }

          //1.1 event handling
          public void mouseClicked(MouseEvent e) {
          }

          public void mousePressed(MouseEvent e) {
              addMouseMotionListener(this);
      double bestdist = Double.MAX_VALUE;
      int x = e.getX();
      int y = e.getY();
      for (int i = 0 ; i < nnodes ; i++) {
      Node n = nodes[i];
      double dist = (n.x - x) * (n.x - x) + (n.y - y) * (n.y - y);
      if (dist < bestdist) {
      pick = n;
      bestdist = dist;
      }
      }
      pickfixed = pick.fixed;
      pick.fixed = true;
      pick.x = x;
      pick.y = y;
      repaint();
      e.consume();
          }

          public void mouseReleased(MouseEvent e) {
              removeMouseMotionListener(this);
              if (pick != null) {
                  pick.x = e.getX();
                  pick.y = e.getY();
                  pick.fixed = pickfixed;
                  pick = null;
              }
      repaint();
      e.consume();
          }

          public void mouseEntered(MouseEvent e) {
          }

          public void mouseExited(MouseEvent e) {
          }

          public void mouseDragged(MouseEvent e) {
      pick.x = e.getX();
      pick.y = e.getY();
      repaint();
      e.consume();
          }

          public void mouseMoved(MouseEvent e) {
          }

          public void start() {
      relaxer = new Thread(this);
      relaxer.start();
          }

          public void stop() {
      relaxer = null;
          }

      }


      public class Graph extends Applet implements ActionListener, ItemListener {

          GraphPanel panel;
          Panel controlPanel;

          Button scramble = new Button("Scramble");
          Button shake = new Button("Shake");
          Checkbox stress = new Checkbox("Stress");
          Checkbox random = new Checkbox("Random");

          public void init() {
      setLayout(new BorderLayout());

      panel = new GraphPanel(this);
      add("Center", panel);
      controlPanel = new Panel();
      add("South", controlPanel);

      controlPanel.add(scramble); scramble.addActionListener(this);
      controlPanel.add(shake); shake.addActionListener(this);
      controlPanel.add(stress); stress.addItemListener(this);
      controlPanel.add(random); random.addItemListener(this);

      String edges = getParameter("edges");
      for (StringTokenizer t = new StringTokenizer(edges, ",") ; t.hasMoreTokens() ; ) {
      String str = t.nextToken();
      int i = str.indexOf('-');
      if (i > 0) {
      int len = 50;
      int j = str.indexOf('/');
      if (j > 0) {
      len = Integer.valueOf(str.substring(j+1)).intValue();
      str = str.substring(0, j);
      }
      panel.addEdge(str.substring(0,i), str.substring(i+1), len);
      }
      }
      Dimension d = getSize();
      String center = getParameter("center");
      if (center != null){
      Node n = panel.nodes[panel.findNode(center)];
      n.x = d.width / 2;
      n.y = d.height / 2;
      n.fixed = true;
      }
          }

          public void destroy() {
              remove(panel);
              remove(controlPanel);
          }

          public void start() {
      panel.start();
          }

          public void stop() {
      panel.stop();
          }

          public void actionPerformed(ActionEvent e) {
      Object src = e.getSource();

      if (src == scramble) {
      play(getCodeBase(), "audio/computer.au");
      Dimension d = getSize();
      for (int i = 0 ; i < panel.nnodes ; i++) {
      Node n = panel.nodes[i];
      if (!n.fixed) {
      n.x = 10 + (d.width-20)*Math.random();
      n.y = 10 + (d.height-20)*Math.random();
      }
      }
      return;
      }

      if (src == shake) {
      play(getCodeBase(), "audio/gong.au");
      Dimension d = getSize();
      for (int i = 0 ; i < panel.nnodes ; i++) {
      Node n = panel.nodes[i];
      if (!n.fixed) {
      n.x += 80*Math.random() - 40;
      n.y += 80*Math.random() - 40;
      }
      }
      }

          }

          public void itemStateChanged(ItemEvent e) {
      Object src = e.getSource();
      boolean on = e.getStateChange() == ItemEvent.SELECTED;
      if (src == stress) panel.stress = on;
      else if (src == random) panel.random = on;
          }

          public String getAppletInfo() {
      return "Title: GraphLayout \nAuthor: <unknown>";
          }

          public String[][] getParameterInfo() {
      String[][] info = {
      {"edges", "delimited string", "A comma-delimited list of all the edges. It takes the form of 'C-N1,C-N2,C-N3,C-NX,N1-N2/M12,N2-N3/M23,N3-NX/M3X,...' where C is the name of center node (see 'center' parameter) and NX is a node attached to the center node. For the edges connecting nodes to eachother (and not to the center node) you may (optionally) specify a length MXY separated from the edge name by a forward slash."},
      {"center", "string", "The name of the center node."}
      };
      return info;
          }

      }

      -------------------- HTML-Page for Test -----
      <html>
        <head>
            <title>Graph Layout (example 1)</title>
        </head>
        <body>
          <h1>Graph Layout (example 1)</h1>
            <hr>
            
            <OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" name="GraphApplet" width="100%" height="100%" codebase="http://java.sun.com/products/plugin/1.2.2/jinstall-1_2_2-win.cab#Version=1,2,2,0">
      <PARAM name="code" value="Graph.class">
      <PARAM name="type" value="application/x-java-applet;version=1.4">
      <param name=edges value="joe-food,joe-dog,joe-tea,joe-cat,joe-table,table-plate/50,plate-food/30,food-mouse/100,food-dog/100,mouse-cat/150,table-cup/30,cup-tea/30,dog-cat/80,cup-spoon/50,plate-fork,dog-flea1,dog-flea2,flea1-flea2/20,plate-knife">
      <param name=center value="joe">

      <COMMENT>
      <EMBED type="application/x-java-applet;version=1.4" name="GraphApplet" width="100%" height="100%" pluginspage="http://java.sun.com/products/plugin/" code="Graph.class"
      edges="joe-food,joe-dog,joe-tea,joe-cat,joe-table,table-plate/50,plate-food/30,food-mouse/100,food-dog/100,mouse-cat/150,table-cup/30,cup-tea/30,dog-cat/80,cup-spoon/50,plate-fork,dog-flea1,dog-flea2,flea1-flea2/20,plate-knife" center="joe">
      <NOEMBED>
      </COMMENT>
      </noembed></embed>
      </object>
            <a href="Graph.java">The source</a>.
        </body>
      </html>

      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      Not resizing the window ;)
      (Incident Review ID: 244611)
      ======================================================================
      ###@###.### 2004-03-23
      Name: gm110360 Date: 03/23/2004


      FULL PRODUCT VERSION :
      java version "1.4.2_03"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_03-b02)
      Java HotSpot(TM) Client VM (build 1.4.2_03-b02, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows XP Professional, Version 2002, Service Pack 1, German

      EXTRA RELEVANT SYSTEM CONFIGURATION :
      Internet Explorer
      Version: 6.0.2800.1106.xpsp2.030422-1633
      Product ID:55375-OEM-0043151-73936
      Updateversion: SP1; Q832894;Q330994

      A DESCRIPTION OF THE PROBLEM :
      Starting the applet attatched with the html-file attatched and then resizing the Browser-Window over and over again (do this fast). At some time Internet-Explorer is crashing and attatched Exception-file is written.

      Allways the error occurs in:

      Function=Java_sun_awt_windows_WColor_getDefaultColor+0x2E1D
      Library=C:\Programme\Java\j2re1.4.2_03\bin\awt.dll

      This problem occurs on a applet of us which we want to start in full-screen-mode. Because of that the applet is defined with a width and height of 100%.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      1. Open html-Page in Internetexplorer
      2. Resize Browserwindow very fst

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Browser and applet should resize
      ACTUAL -
      Browser is crashing after a while

      ERROR MESSAGES/STACK TRACES THAT OCCUR :

      An unexpected exception has been detected in native code outside the VM.
      Unexpected Signal : EXCEPTION_ACCESS_VIOLATION (0xc0000005) occurred at PC=0x615243F
      Function=Java_sun_awt_windows_WColor_getDefaultColor+0x2E1D
      Library=C:\Programme\Java\j2re1.4.2_03\bin\awt.dll

      Current Java thread:
      at sun.awt.windows.WToolkit.eventLoop(Native Method)
      at sun.awt.windows.WToolkit.run(Unknown Source)
      at java.lang.Thread.run(Unknown Source)

      Dynamic libraries:
      0x00400000 - 0x00419000 C:\Programme\Internet Explorer\iexplore.exe
      0x77F40000 - 0x77FEE000 C:\WINDOWS\System32\ntdll.dll
      0x77E40000 - 0x77F38000 C:\WINDOWS\system32\kernel32.dll
      0x77BE0000 - 0x77C33000 C:\WINDOWS\system32\msvcrt.dll
      0x77D10000 - 0x77D9C000 C:\WINDOWS\system32\USER32.dll
      0x77C40000 - 0x77C80000 C:\WINDOWS\system32\GDI32.dll
      0x77DA0000 - 0x77E3C000 C:\WINDOWS\system32\ADVAPI32.dll
      0x78000000 - 0x78086000 C:\WINDOWS\system32\RPCRT4.dll
      0x70A70000 - 0x70AD5000 C:\WINDOWS\system32\SHLWAPI.dll
      0x71700000 - 0x71849000 C:\WINDOWS\System32\SHDOCVW.dll
      0x78090000 - 0x78174000 C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.10.0_x-ww_f7fb5805\comctl32.dll
      0x773A0000 - 0x77B9C000 C:\WINDOWS\system32\SHELL32.dll
      0x77310000 - 0x7739B000 C:\WINDOWS\system32\comctl32.dll
      0x7CCC0000 - 0x7CDE1000 C:\WINDOWS\system32\ole32.dll
      0x5B0F0000 - 0x5B124000 C:\WINDOWS\System32\uxtheme.dll
      0x71500000 - 0x715FD000 C:\WINDOWS\System32\BROWSEUI.dll
      0x723C0000 - 0x723D3000 C:\WINDOWS\System32\browselc.dll
      0x75EE0000 - 0x75EFF000 C:\WINDOWS\system32\appHelp.dll
      0x76F90000 - 0x77008000 C:\WINDOWS\System32\CLBCATQ.DLL
      0x770F0000 - 0x7717B000 C:\WINDOWS\system32\OLEAUT32.dll
      0x77010000 - 0x770E3000 C:\WINDOWS\System32\COMRes.dll
      0x77BD0000 - 0x77BD7000 C:\WINDOWS\system32\VERSION.dll
      0x63000000 - 0x63097000 C:\WINDOWS\system32\WININET.dll
      0x76260000 - 0x762E9000 C:\WINDOWS\system32\CRYPT32.dll
      0x76240000 - 0x76250000 C:\WINDOWS\system32\MSASN1.dll
      0x76F50000 - 0x76F60000 C:\WINDOWS\System32\Secur32.dll
      0x765C0000 - 0x76610000 C:\WINDOWS\System32\cscui.dll
      0x765A0000 - 0x765BB000 C:\WINDOWS\System32\CSCDLL.dll
      0x76620000 - 0x76708000 C:\WINDOWS\System32\SETUPAPI.dll
      0x10000000 - 0x1000C000 C:\Programme\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
      0x00C80000 - 0x00C8D000 C:\Programme\Xi\NetTransport 2\NTIEHelper.dll
      0x73D30000 - 0x73E22000 C:\WINDOWS\System32\MFC42.DLL
      0x61DC0000 - 0x61DCE000 C:\WINDOWS\System32\MFC42LOC.DLL
      0x1A400000 - 0x1A47A000 C:\WINDOWS\system32\urlmon.dll
      0x63580000 - 0x63830000 C:\WINDOWS\System32\mshtml.dll
      0x75E30000 - 0x75ED8000 C:\WINDOWS\System32\SXS.DLL
      0x76110000 - 0x7619E000 C:\WINDOWS\System32\shdoclc.dll
      0x746F0000 - 0x7477F000 C:\WINDOWS\System32\MLANG.dll
      0x01530000 - 0x01731000 C:\WINDOWS\System32\msi.dll
      0x74670000 - 0x74696000 C:\WINDOWS\System32\msimtf.dll
      0x746A0000 - 0x746E4000 C:\WINDOWS\System32\MSCTF.dll
      0x74640000 - 0x74667000 C:\WINDOWS\System32\MSLS31.DLL
      0x76330000 - 0x7634C000 C:\WINDOWS\System32\IMM32.DLL
      0x6FFB0000 - 0x6FFD5000 C:\WINDOWS\System32\cdfview.dll
      0x76AF0000 - 0x76B1D000 C:\WINDOWS\System32\WINMM.dll
      0x72C90000 - 0x72C99000 C:\WINDOWS\System32\wdmaud.drv
      0x72C80000 - 0x72C88000 C:\WINDOWS\System32\msacm32.drv
      0x77BB0000 - 0x77BC4000 C:\WINDOWS\System32\MSACM32.dll
      0x77BA0000 - 0x77BA7000 C:\WINDOWS\System32\midimap.dll
      0x71A30000 - 0x71A39000 C:\WINDOWS\System32\wsock32.dll
      0x71A10000 - 0x71A25000 C:\WINDOWS\System32\WS2_32.dll
      0x71A00000 - 0x71A08000 C:\WINDOWS\System32\WS2HELP.dll
      0x719B0000 - 0x719EC000 C:\WINDOWS\system32\mswsock.dll
      0x76EA0000 - 0x76ED7000 C:\WINDOWS\System32\RASAPI32.DLL
      0x76E50000 - 0x76E61000 C:\WINDOWS\System32\rasman.dll
      0x71BA0000 - 0x71BEE000 C:\WINDOWS\System32\NETAPI32.dll
      0x76E70000 - 0x76E9B000 C:\WINDOWS\System32\TAPI32.dll
      0x76E40000 - 0x76E4D000 C:\WINDOWS\System32\rtutils.dll
      0x719F0000 - 0x719F8000 C:\WINDOWS\System32\wshtcpip.dll
      0x72240000 - 0x72245000 C:\WINDOWS\System32\sensapi.dll
      0x75A10000 - 0x75AB7000 C:\WINDOWS\system32\USERENV.dll
      0x76EE0000 - 0x76F05000 C:\WINDOWS\System32\DNSAPI.dll
      0x76F70000 - 0x76F77000 C:\WINDOWS\System32\winrnr.dll
      0x76F20000 - 0x76F4D000 C:\WINDOWS\system32\WLDAP32.dll
      0x76F80000 - 0x76F85000 C:\WINDOWS\System32\rasadhlp.dll
      0x6B700000 - 0x6B790000 C:\WINDOWS\System32\jscript.dll
      0x74C30000 - 0x74C9F000 C:\WINDOWS\System32\mshtmled.dll
      0x71CC0000 - 0x71CDB000 C:\WINDOWS\System32\actxprxy.dll
      0x6D140000 - 0x6D14B000 C:\WINDOWS\System32\dispex.dll
      0x76BC0000 - 0x76BEE000 C:\WINDOWS\System32\credui.dll
      0x5E490000 - 0x5E49C000 C:\WINDOWS\System32\pstorec.dll
      0x76AD0000 - 0x76AE5000 C:\WINDOWS\System32\ATL.DLL
      0x72D70000 - 0x72E85000 C:\WINDOWS\System32\msxml3.dll
      0x66D10000 - 0x66D1A000 C:\WINDOWS\System32\imgutil.dll
      0x6D440000 - 0x6D450000 C:\Programme\Java\j2re1.4.2_03\bin\npjpi142_03.dll
      0x5F1A0000 - 0x5F1BA000 C:\WINDOWS\System32\OLEPRO32.DLL
      0x6D310000 - 0x6D327000 C:\Programme\Java\j2re1.4.2_03\bin\jpiexp32.dll
      0x6D380000 - 0x6D398000 C:\Programme\Java\j2re1.4.2_03\bin\jpishare.dll
      0x08000000 - 0x08138000 C:\PROGRA~1\Java\J2RE14~1.2_0\bin\client\jvm.dll
      0x03730000 - 0x03737000 C:\PROGRA~1\Java\J2RE14~1.2_0\bin\hpi.dll
      0x03750000 - 0x0375E000 C:\PROGRA~1\Java\J2RE14~1.2_0\bin\verify.dll
      0x03870000 - 0x03889000 C:\PROGRA~1\Java\J2RE14~1.2_0\bin\java.dll
      0x03890000 - 0x0389D000 C:\PROGRA~1\Java\J2RE14~1.2_0\bin\zip.dll
      0x060E0000 - 0x061EF000 C:\Programme\Java\j2re1.4.2_03\bin\awt.dll
      0x72F70000 - 0x72F93000 C:\WINDOWS\System32\WINSPOOL.DRV
      0x06200000 - 0x06250000 C:\Programme\Java\j2re1.4.2_03\bin\fontmanager.dll
      0x736D0000 - 0x73714000 C:\WINDOWS\System32\ddraw.dll
      0x73B30000 - 0x73B36000 C:\WINDOWS\System32\DCIMAN32.dll
      0x738B0000 - 0x73977000 C:\WINDOWS\System32\D3DIM700.DLL
      0x6D2F0000 - 0x6D304000 C:\Programme\Java\j2re1.4.2_03\bin\jpicom32.dll
      0x07F80000 - 0x07F8F000 C:\Programme\Java\j2re1.4.2_03\bin\net.dll
      0x07F90000 - 0x07FB2000 C:\Programme\Java\j2re1.4.2_03\bin\dcpr.dll
      0x76350000 - 0x76396000 C:\WINDOWS\system32\comdlg32.dll
      0x76940000 - 0x76965000 C:\WINDOWS\System32\ntshrui.dll
      0x76930000 - 0x76937000 C:\WINDOWS\System32\LINKINFO.dll
      0x71A80000 - 0x71A91000 C:\WINDOWS\system32\MPR.dll
      0x75F00000 - 0x75F06000 C:\WINDOWS\System32\drprov.dll
      0x71B90000 - 0x71B9D000 C:\WINDOWS\System32\ntlanman.dll
      0x71C50000 - 0x71C66000 C:\WINDOWS\System32\NETUI0.dll
      0x71C10000 - 0x71C4C000 C:\WINDOWS\System32\NETUI1.dll
      0x71C00000 - 0x71C06000 C:\WINDOWS\System32\NETRAP.dll
      0x71B70000 - 0x71B81000 C:\WINDOWS\System32\SAMLIB.dll
      0x75F10000 - 0x75F19000 C:\WINDOWS\System32\davclnt.dll
      0x73CE0000 - 0x73CF2000 C:\WINDOWS\System32\shgina.dll
      0x75910000 - 0x75A03000 C:\WINDOWS\System32\MSGINA.dll
      0x76300000 - 0x7630F000 C:\WINDOWS\System32\WINSTA.dll
      0x01490000 - 0x014C2000 C:\WINDOWS\System32\ODBC32.dll
      0x01510000 - 0x01528000 C:\WINDOWS\System32\odbcint.dll
      0x76C50000 - 0x76C72000 C:\WINDOWS\system32\imagehlp.dll
      0x6DA00000 - 0x6DA7D000 C:\WINDOWS\system32\DBGHELP.dll
      0x76BB0000 - 0x76BBB000 C:\WINDOWS\System32\PSAPI.DLL

      Heap at VM Abort:
      Heap
       def new generation total 960K, used 721K [0x1a480000, 0x1a580000, 0x1ac30000)
        eden space 896K, 78% used [0x1a480000, 0x1a52eef0, 0x1a560000)
        from space 64K, 34% used [0x1a560000, 0x1a565740, 0x1a570000)
        to space 64K, 0% used [0x1a570000, 0x1a570000, 0x1a580000)
       tenured generation total 11252K, used 5400K [0x1ac30000, 0x1b72d000, 0x20880000)
         the space 11252K, 47% used [0x1ac30000, 0x1b1762d8, 0x1b176400, 0x1b72d000)
       compacting perm gen total 7424K, used 7351K [0x20880000, 0x20fc0000, 0x24880000)
         the space 7424K, 99% used [0x20880000, 0x20fade80, 0x20fae000, 0x20fc0000)

      Local Time = Tue Mar 23 08:03:46 2004
      Elapsed Time = 281
      #
      # The exception above was detected in native code outside the VM
      #
      # Java VM: Java HotSpot(TM) Client VM (1.4.2_03-b02 mixed mode)
      #


      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      Using Applet GraphLayout out of JDK-Demo-Folder:
      -------------------- Applet-Sourcecode ----------------------
      /*
       * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
       *
       * Redistribution and use in source and binary forms, with or without
       * modification, are permitted provided that the following conditions
       * are met:
       *
       * -Redistributions of source code must retain the above copyright
       * notice, this list of conditions and the following disclaimer.
       *
       * -Redistribution in binary form must reproduct the above copyright
       * notice, this list of conditions and the following disclaimer in
       * the documentation and/or other materials provided with the distribution.
       *
       * Neither the name of Sun Microsystems, Inc. or the names of contributors
       * may be used to endorse or promote products derived from this software
       * without specific prior written permission.
       *
       * This software is provided "AS IS," without a warranty of any kind. ALL
       * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
       * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
       * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT
       * BE LIABLE FOR ANY DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
       * OF OR RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THE SOFTWARE OR ITS
       * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
       * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
       * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
       * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN
       * IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
       *
       * You acknowledge that Software is not designed, licensed or intended for
       * use in the design, construction, operation or maintenance of any nuclear
       * facility.
       */

      /*
       * @(#)Graph.java 1.13 03/01/23
       */

      import java.util.*;
      import java.awt.*;
      import java.applet.Applet;
      import java.awt.event.*;


      class Node {
          double x;
          double y;

          double dx;
          double dy;

          boolean fixed;

          String lbl;
      }


      class Edge {
          int from;
          int to;

          double len;
      }


      class GraphPanel extends Panel
          implements Runnable, MouseListener, MouseMotionListener {
          Graph graph;
          int nnodes;
          Node nodes[] = new Node[100];

          int nedges;
          Edge edges[] = new Edge[200];

          Thread relaxer;
          boolean stress;
          boolean random;

          GraphPanel(Graph graph) {
      this.graph = graph;
      addMouseListener(this);
          }

          int findNode(String lbl) {
      for (int i = 0 ; i < nnodes ; i++) {
      if (nodes[i].lbl.equals(lbl)) {
      return i;
      }
      }
      return addNode(lbl);
          }
          int addNode(String lbl) {
      Node n = new Node();
      n.x = 10 + 380*Math.random();
      n.y = 10 + 380*Math.random();
      n.lbl = lbl;
      nodes[nnodes] = n;
      return nnodes++;
          }
          void addEdge(String from, String to, int len) {
      Edge e = new Edge();
      e.from = findNode(from);
      e.to = findNode(to);
      e.len = len;
      edges[nedges++] = e;
          }

          public void run() {
              Thread me = Thread.currentThread();
      while (relaxer == me) {
      relax();
      if (random && (Math.random() < 0.03)) {
      Node n = nodes[(int)(Math.random() * nnodes)];
      if (!n.fixed) {
      n.x += 100*Math.random() - 50;
      n.y += 100*Math.random() - 50;
      }
      graph.play(graph.getCodeBase(), "audio/drip.au");
      }
      try {
      Thread.sleep(100);
      } catch (InterruptedException e) {
      break;
      }
      }
          }

          synchronized void relax() {
      for (int i = 0 ; i < nedges ; i++) {
      Edge e = edges[i];
      double vx = nodes[e.to].x - nodes[e.from].x;
      double vy = nodes[e.to].y - nodes[e.from].y;
      double len = Math.sqrt(vx * vx + vy * vy);
                  len = (len == 0) ? .0001 : len;
      double f = (edges[i].len - len) / (len * 3);
      double dx = f * vx;
      double dy = f * vy;

      nodes[e.to].dx += dx;
      nodes[e.to].dy += dy;
      nodes[e.from].dx += -dx;
      nodes[e.from].dy += -dy;
      }

      for (int i = 0 ; i < nnodes ; i++) {
      Node n1 = nodes[i];
      double dx = 0;
      double dy = 0;

      for (int j = 0 ; j < nnodes ; j++) {
      if (i == j) {
      continue;
      }
      Node n2 = nodes[j];
      double vx = n1.x - n2.x;
      double vy = n1.y - n2.y;
      double len = vx * vx + vy * vy;
      if (len == 0) {
      dx += Math.random();
      dy += Math.random();
      } else if (len < 100*100) {
      dx += vx / len;
      dy += vy / len;
      }
      }
      double dlen = dx * dx + dy * dy;
      if (dlen > 0) {
      dlen = Math.sqrt(dlen) / 2;
      n1.dx += dx / dlen;
      n1.dy += dy / dlen;
      }
      }

      Dimension d = getSize();
      for (int i = 0 ; i < nnodes ; i++) {
      Node n = nodes[i];
      if (!n.fixed) {
      n.x += Math.max(-5, Math.min(5, n.dx));
      n.y += Math.max(-5, Math.min(5, n.dy));
                  }
                  if (n.x < 0) {
                      n.x = 0;
                  } else if (n.x > d.width) {
                      n.x = d.width;
                  }
                  if (n.y < 0) {
                      n.y = 0;
                  } else if (n.y > d.height) {
                      n.y = d.height;
                  }
      n.dx /= 2;
      n.dy /= 2;
      }
      repaint();
          }

          Node pick;
          boolean pickfixed;
          Image offscreen;
          Dimension offscreensize;
          Graphics offgraphics;

          final Color fixedColor = Color.red;
          final Color selectColor = Color.pink;
          final Color edgeColor = Color.black;
          final Color nodeColor = new Color(250, 220, 100);
          final Color stressColor = Color.darkGray;
          final Color arcColor1 = Color.black;
          final Color arcColor2 = Color.pink;
          final Color arcColor3 = Color.red;

          public void paintNode(Graphics g, Node n, FontMetrics fm) {
      int x = (int)n.x;
      int y = (int)n.y;
      g.setColor((n == pick

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              Assignee:
              dphamsunw Danielle Pham (Inactive)
              Reporter:
              gmanwanisunw Girish Manwani (Inactive)
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