Christopher Hylands wrote:
>
> This is the right place to post questions about ptplot.
>
> In general, an applet should never freeze your computer.
> If it does, it is a bug with the OS and with the JDK.
>
> [I might argue that one definition of an operating system is a system
> that prevents user level programs from hanging freezing the computer,
> but that is a different kettle of fish :-)]
>
> I suspect that you are running Windows 95/98?
Yes, I am (blush) running Windows 98. That is unfortunately the
platform we must develop for. One could argue then that it is not an
operating system, heh.
> I've seen a fair amount of misbehaviour with applications and 95/98
> which ended up require a reboot. If you are indeed running 95/98, and
> you have access to a modern operating system, such as Linux or NT or
> Windows 2000 you might try reproducing the bug there.
I did try OS/2 (and I think Linux.. I don't have X here at work but I do
at home). With the latest Netscape in OS/2 it doesn't crash but the
scrolling bar does not work with three ptplot applets positioned
vertically.
> You don't mention which version of ptplot you are running, so it is
> difficult for me to diagnose the problem. The applet portion of
> Ptplot3.1 will compile with JDK1.1.x, but the application portion uses
> Swing, so Ptplot3.1 is easiest to compile with JDK 1.2.2
Sorry for leaving that information out. The README file says ptplot3.1
and it was aquired two or three weeks ago from berkeley.edu.
<snipped part about other versions of ptplot>
> If you are still having problems, let me know what OS you are running,
> what versions of IE and Netscape Navigator you tried, what version of
> ptplot you tried, and whether you were able to reproduce the problem
> with web pages on the Ptolemy website.
IE 5.0 and Netscape 4.7.. but there is a new wrinkle. I have replaced
the <applet> tags with <object> and <embed> tags and got a test plot to
work. Of course this requires a plugin. It looks like the built-in JRE
is the biggest problem. The problem now is supporting Linux, OS/2 and
others. Besides, the plugin requires an extra step and therefore more
potential technical support.
I have tried all the demo applets on the Ptolemy page and they all run
flawlessly. However, in the process of expermenting with plotML I have
suceeded to again crash my (win98) system even with the <object>/<embed>
tags. Come to think of it, the problems seem to exist only when using
plotML by referencing the dataurl parameter. (I'm not positive though.)
I thought java was safer than this. I have not had this much problem
with c/c++, wild pointers and all.
On the positive side, ptplot is a great package and provides all we need
and more. Now when I get these language or platform issues resolved we
will have just what we were looking for.
Thank You,
David Koski
[EMAIL PROTECTED]
[EMAIL PROTECTED]
> --------
>
> Hello,
>
> Sorry if this is not the right place to post this problem. I know of no
> other. I am trying to use ptplot in an applet and it freezes the
> compouter (no mouse, etc.) with both IE and Netscape in MS Windows.
> This happens with most systems but not all. One computer can
> successfully view the pages containing the applets. I have tried
> compiling ptplot with 1.1.8 in jbuilder 3 and still no difference.
>
> david koski
> [EMAIL PROTECTED]
> --------
>
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