Re: dynamic graphs (in real time)

IMHO, PHP is the wrong tool for this job. For mission critical real-time, you really need C++. At the very least Java but I'd go C++) =C= * Cal Evans * http://www.christianperformer.com * Stay plugged into your audience ----- Original Message ----- From: "Wakan" <porcapuzza@yahoo.it> To: <php-general@lists.php.net> Sent: Saturday, May 03, 2003 12:24 PM Subject: Re: [PHP] dynamic graphs (in real time) > ok, > but I don't know how to use flash to do this, > and in this way I don't know how to create the graph. > The connection is intranet (via LAN): > this application will be used to monitor in real time the > state of the sensors. > somethig like an heart rate graph. > > At 10.13 03/05/2003 -0700, you wrote: > >I think this could be done with a few tools. > > > >You could build a flash app that can tunnel to the server without refreshing > >the page. > > > >flash would get the new data > > > >then > > > >have draw a new graph using javascript to write/alter an SVG graph > > > >This might work for you > > > >The persons that will be viewing this page, how are they going to connect to > >the server, via a modem or highspeed connection? > > > >if it is a modem connection, you can forget REAL-TIME refreshing altogether. > > > >it would take longer then 1 sec to send the request / process the request / > >receive processed data and then change the graph. > > > >But what I described above will get you going down the right road IMHO. > > > >Jim Lucas > > > >----- Original Message ----- > >From: "Wakan" <porcapuzza@yahoo.it> > >To: <php-general@lists.php.net> > >Sent: Saturday, May 03, 2003 10:00 AM > >Subject: RE: [PHP] dynamic graphs (in real time) > > > > > > > Yes, > > > but the frequency I need is inferior to 1 sec. > > > Is there something like opening a connection > > > with the server without closing it, and update > > > the image continuously? > > > but without flickering problems... > > > > > > At 12.50 03/05/2003 -0400, you wrote: > > > >Why not have a php cron job that runs every x seconds and creates a new > > > >gif of the graph, then your page can use javascript to reload the image > > > >every x seconds > > > > > > > > > -----Original Message----- > > > > > From: Wakan [mailto:porcapuzza@yahoo.it] > > > > > Sent: Saturday, May 03, 2003 12:50 PM > > > > > To: php-general@lists.php.net > > > > > Subject: [PHP] dynamic graphs (in real time) > > > > > > > > > > I'm writing an application that > > > > > reads data from some serial sensor. > > > > > I'd like to generate a graph (I'm using the jpgraph) from that data > > > >and > > > > > display it in real time. > > > > > The question is: how can I show data while they're changing ? > > > > > I've tried to reload the browser each seconds, but it's not so elegant > > > > > (I don't want to reload the entire page) and I need to display data > > > >more > > > > > frequently. > > > > > Some ideas? > > > > > Carlo > > > > > > > > > > > > > > > > > > > > -- > > > > > PHP General Mailing List (http://www.php.net/) > > > > > To unsubscribe, visit: > > > > > http://www.php.net/unsub.php > > > > > > > > > > > > -- > > > PHP General Mailing List (http://www.php.net/) > > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > > > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >