java communicating with javascript

[sunyi000]

Hi,

I have a swing application communicating with javascript through java scripting engine. It works fine. I pass a JPanel to the javascript function and created a JButton in javascript, what I want to do is to display a message when button is clicked. I know very little about javascript so my question is how could I add a button click event to the JButton in Javascript? something like b.addMouseListener.......
Thanks my code is pasted below


importPackage(javax.swing);
importPackage(java.awt);
importPackage(java.awt.event);

function addButton(jf)
{
var b=new JButton("Click me");
b.setButtonStyle(JideButton.TOOLBOX_STYLE);
b.setPreferredSize(new Dimension(110,30));
b.setMaximumSize(new Dimension(110,30));

//button click event here

jf.add(b);


}

[Norm]

What package(s) do you use in java to communicate with javascript?

Your posted code leaves out a lot.

[sunyi000]

im using standard java scripting engine to communicate with javascript..

the communication works fine.. my question is how do I add a button click event to JButton in javascript?

the posted code is just a function in javascript

[Norm]

What package(s) do you use in java to communicate with javascript? I was wondering how to research the classes.
What import statement do you use?

[sunyi000]

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

[sunyi000]

sorry, corrections: i passed a JPanel (not JButton) to the javascript functio, created a JButton in javascript and added it to the JPanel

[Norm]

Could you post the String you pass to the eval() method that shows a button using javascript?

Your posted code sample leaves a lot out.

[sunyi000]

the string is the javascript code i posted above..it is js file in C:\ drive, i read this file into a string and then pass the string to the eval..should I post my question to the javascript forum???

ScriptEngineManager manager=new ScriptEngineManager();
ScriptEngine se=manager.getEngineByName("js");
String scr = "importPackage(javax.swing);importPackage(java.awt );"+
"importPackage(java.awt.event);" +
"function addButton(jf){" +
"var b=new JButton("Click me");"+
"b.setPreferredSize(new Dimension(110,30));"+
"b.setMaximumSize(new Dimension(110,30)); "+
"jf.add(b);"+
"}";

se.eval(scr);
Invocable invocableEngine = (Invocable)se;
invocableEngine.invokeFunction("addButton", p); //------p IS A JPANEL

[Norm]

Thanks, I can see a button on a panel now. But why?

If you don't know javascript, why are you trying to create a java program that can talk to a javascript program? How do you plan to use this?

[sunyi000]

i want to make my swing application configurable.. i.e. if the js file exist in a pre-defined directory, execute the script..if there's no script exist in that directory, do nothing.

I previously tried to used scala as the scripting language but it doesn't compliant with the jsr-223 frame work. The standard java scripting engine uses rhino which is javascript, so I switched to javascript. according to this link https://developer.mozilla.org/en/Scripting_Java
there must be some way to do what I want, I just couldn't get it work properly. Have a look at the section "JavaScript Functions as Java Interfaces". Thanks

[Norm]

Would the binding between your Swing program and the javascript have to be very tight?
For example your current project requires a JPanel.

Why the script (that you don't know) vs pure java that you do?

[sunyi000]

Thanks I got it work...

need to use javascript function as Java interface, in this case use javascript function to implement MouseAdapter interface.

Thanks..

[JosAH]

Have you ever had a look at BeanShell? It is interpreted Java and some more. I like it.

kind regards,

Jos