Processing 1.0 - Processing Discourse - Communication between JS/Flash and Processing

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Communication between JS/Flash and Processing (Read 6157 times)

bruce

Communication between JS/Flash and Processing
Aug 12^th, 2005, 7:27pm

I dunno how to use the javascript library after reading the doc. Can someone pls post an example here, showing the communication between processing and javascript?

Basically I wanna know how to access JS var/function/etc from Processing, and vice versa.....

Besides, I want to do a Flash and Processing communication. I can think of using Javasciprt. Is there other ways to do it?

http://www.betaruce.com

seltar Senior Member Offline Posts: 475	Re: Communication between JS/Flash and Processing Reply #1 - Aug 13^th, 2005, 12:12pm You could use PHP to write param (http://processing.org/reference/param_.html) which processing then can read. And to communicate with the flashfile, i think you can use php to pass variables to a flash-file.. hope this gets you somewhere! -seltar
	I'm bored, therefore I program http://seltar.org > seltar's special place http://snippet.seltar.org > seltar's snippet palace http://libraries.seltar.org > seltar's libraries

tex

Re: Communication between JS/Flash and Processing
Reply #2 - Aug 14^th, 2005, 11:09am

You can access function in an Applet like this.

Appletcode:
Code:


import java.awt.Graphics;
import java.applet.Applet;

public class HelloWorld extends Applet
{
 String myString ="Das ist mein Hallo-Text";

 public void paint(Graphics g)
 {
  g.drawString(myString, 25, 20);
 }
 public void setString(String aString)
 {
  myString = aString;
  repaint();
 }
}

HTMLCode:
Code:


<html><head><title>Test</title>
</head><body>
<applet code="HelloWorld" name="Hallo" width=150 height=25>
</applet><br>
<form name="Eingabe" action="">
<input type="text" name="Text">
<input type="button" value="Test"
onclick="document.Hallo.setString(document.Eingabe.Text.value)">
</form>
</body></html>

From Flash you can directly call javascript functions with the getUrl function:

getUrl("javascript:yourfunction()");

I think it should simular work from the applet, so maybe the processing link function works:

link("javascript:yourfunction()");

Unfortunatly you can not call function in flash with javascript you can only change values.

Take a look here:

http://www.macromedia.com/support/flash/publishexport/scriptingwithflash/

bruce

Re: Communication between JS/Flash and Processing
Reply #3 - Aug 14^th, 2005, 12:11pm

the new version of Flash allows direct calling of javascirpt functions and variables so i think this is very convenient....

thanks for ur applet example....but if i want to do so in Processing (since i'm not typing java codes but Processing now) what is the code? i.e. the code in Processing to pass values and call functions of Javascirpt?

http://www.betaruce.com

bruce YaBB Newbies Offline Posts: 10	Re: Communication between JS/Flash and Processing Reply #4 - Aug 15^th, 2005, 6:23pm can anyone paste the code of Processing that can call and run javascript fcts and var?
	http://www.betaruce.com

fjen

Re: Communication between JS/Flash and Processing
Reply #5 - Apr 28^th, 2006, 3:59pm

just to make this complete ( should go into processinghacks.com ? )

applet - to - javascript

see:
http://www.rgagnon.com/javadetails/java-0172.html

Code:


... see cellos and my posts further down

javascript - to - applet

see:
http://bezier.de/jsloading/

Code:


<script type="text/javascript" language="javascript">
<!--
var checkApplet = function () {
    if ( document.applets && document.applets.length > 0 )
    {
        var papplet = document.applets[0];  // processing applet

        if ( papplet.frameCount > 0 )  // it's running
        {
            alert( papplet.frameCount );  // do smtg usefull instead ...
        }
        else
        {
            setTimeout( 'checkApplet()', 1000 );  // try again in 1 sec.
        }
    }
}

window.onload = function () {
    setTimeout( 'checkApplet()', 1000 );
}
//-->
</script>

« Last Edit: Apr 28^th, 2006, 11:27pm by fjen »

cello

Re: Communication between JS/Flash and Processing
Reply #6 - Apr 28^th, 2006, 5:57pm

That reflection stuff is pretty nasty. I would suggest just assuming that the user has netscape.javascript.JSObject, and using the class directly.

However, if you absolutely want to use refleciton, then you should really use Classs.getMethod instead of getMethods. That whole compareTo()==0 is also really gross (use .equals()!).

So something like:
Code:


  try {
   Class c = Class.forName("netscape.javascript.JSObject"); 
   Method getWindow = c.getMethod("getWindow",new Class[]{Applet.class}); // on java 1.5 you can do c.getMethod("getWindow",Applet.class);
   Method eval = c.getMethod("eval",new Class[]{String.class});


   Object jswin = getw.invoke(c, new Object[]{this});
 
   jsresult = eval.invoke(jswin, new Object[]{ jscmd }).toString();

Lot shorter, huh? Wink

fjen God Member Offline Posts: 965	Re: Communication between JS/Flash and Processing Reply #7 - Apr 28^th, 2006, 6:17pm hi cello. super. thanks for looking into it ... "my" code was just a copy paste from the mentioned url. it seemed to work ok. i guess it's a little dusty. F

fjen

Re: Communication between JS/Flash and Processing
Reply #8 - Apr 28^th, 2006, 6:22pm

cello wrote on Apr 28^th, 2006, 5:57pm:

... I would suggest just assuming that the user has netscape.javascript.JSObject, and using the class directly. ...

true. it's part of the processing-dist by default. totally forgot that.

Code:


import netscape.javascript.*;

void setup () {
    size( 200, 200 );
}

void draw () {
    // 
    // from 30 down to one line ... that's processing.
    //
    JSObject.getWindow(this).eval( "alert(\"Processing says hello.\")" );
    noLoop();
}

« Last Edit: Apr 30^th, 2006, 11:18am by fjen »

cello Full Member Offline Posts: 143	Re: Communication between JS/Flash and Processing Reply #9 - Apr 29^th, 2006, 6:48pm I do believe getWindow returns a JSObject, so you do not need to cast it. Marcello

fjen God Member Offline Posts: 965	Re: Communication between JS/Flash and Processing Reply #10 - Apr 30^th, 2006, 11:19am arrgg ... sorry. you're right. changed code above. best, F

kdge

Re: Communication between JS/Flash and Processing
Reply #11 - Apr 13^th, 2008, 11:58pm

Just a quick note on using call() vs eval() for JSObject:

I was using JSObject.getWindow(this).call("JSfunction()") and filling in parameters for each call.... I found out this didn't execute my Javascript correctly.

However, when using JSObject.getWindow(this).eval("JSfunction()") it worked like a charm. Just make sure to set the quotes correctly if you are passing in Java variables into your Javascript parameters, e.g.:

eval("javaScriptFunction('"+javaparameters+"');");

See: http://www.rgagnon.com/javadetails/java-0177.html

bingomanatree YaBB Newbies Offline Posts: 5	Re: Communication between JS/Flash and Processing Reply #12 - Feb 12^th, 2009, 11:55pm I get a repeatable crash of Firefox when running the last example. (MaxOSX, Feb 3/09 release);

bingomanatree YaBB Newbies Offline Posts: 5	Re: Communication between JS/Flash and Processing Reply #13 - Mar 3^rd, 2009, 4:42pm To be specific: Firefox freezes up completely when the alert diaolg presents itself!

TM Full Member Offline Posts: 133	Re: Communication between JS/Flash and Processing Reply #14 - Sep 9^th, 2009, 4:40am "document.applets" doesn't work in Firefox, so you might be better of using "getElementById" instead. Just add a id to your object.
	))<>(( www.f u c k-dance-lets-art.com

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