Hi Dimitry,
Dmitry Goldenberg wrote:
Thanks, Jaime.
Well, let's say I have a set of Java API's as follows:
Why not use one of the samples coming with BSF(4Rexx) demonstrating what
you are looking for ?
After compiling the following Java-program ("javac ScriptedUI.java"),
you can invoke it by supplying the filename containing the script (which
could be in any of the BSF supported script engines, inferred from the
filetype), e.g.:
java ScriptedUI ui.js
java ScriptedUI ui.rex
----------------- cut here (ScriptedUI.java) -----------------
/* This example shows how a Java app can allow a script to customize
a UI */
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import org.apache.bsf.*;
import org.apache.bsf.util.*;
public class ScriptedUI {
BSFManager mgr = new BSFManager ();
public ScriptedUI (String fileName) {
Frame f = new Frame ("Application's Main Frame");
f.addWindowListener (new WindowAdapter () {
public void windowClosing (WindowEvent e) {
System.exit (0);
}
});
Panel p = new Panel ();
f.add ("Center", p);
f.add ("North", new Button ("North Button"));
f.add ("South", new Button ("South Button"));
mgr.registerBean ("centerPanel", p); // register panel (will be looked up
by script)
// exec script engine code to do its thing for this
try {
String language = BSFManager.getLangFromFilename (fileName);
FileReader in = new FileReader (fileName);
String script = IOUtils.getStringFromReader (in);
mgr.exec (language, fileName, -1, -1, script);
} catch (BSFException e) {
System.err.println ("Ouch: " + e.getMessage ());
e.printStackTrace ();
} catch (IOException e) {
System.err.println ("Ouch: " + e.getMessage ());
e.printStackTrace ();
}
// now pack and show the frame
f.pack ();
f.show ();
}
public static void main (String[] args) throws Exception {
if (args.length != 1) {
System.err.println ("Usage: java ScriptedUI filename");
System.err.println (" where filename is the name of the script");
System.exit (1);
}
new ScriptedUI (args[0]);
}
}
----------------- cut here -----------------
This is the JavaScript version:
----------------- cut here (ui.js) -----------------
/* pick up the center panel bean */
p = bsf.lookupBean ("centerPanel"); /* get Panel object from the
BSFRegistry */
/* set the layout manager to border */
p.setLayout (new java.awt.BorderLayout ());
/* add a few things */
p.add ("Center", new java.awt.Label ("Middle from JavaScript"));
p.add ("North", new java.awt.TextField ("north text from JavaScript"));
p.add ("South", new java.awt.TextField ("south text from JavaScript"));
p.add ("East", new java.awt.Button ("inner east from JavaScript"));
p.add ("West", new java.awt.Button ("inner west from JavaScript"));
/* configure p a bit */
p.setBackground (java.awt.Color.red);
/* configure the frame that p is in */
f = p.getParent ();
f.setTitle ("Hello from JavaScript (title reset from JavaScript)");
----------------- cut here -----------------
This is the ooRexx-version:
----------------- cut here (ui.rex) -----------------
p = .bsf~bsf.lookupBean("centerPanel") -- reference the entry in BSF registry,
put there by
-- the Java program "ScriptedUI.class"
/* set the layout manager to border */
p~setLayout(.bsf~new("java.awt.BorderLayout"))
/* add a few things */
p~add("Center", .bsf~new("java.awt.Label", "Middle from Object Rexx"))
p~add("North", .bsf~new("java.awt.TextField", "North text from Object Rexx"))
p~add("South", .bsf~new("java.awt.TextField", "South text from Object Rexx"))
p~add("East", .bsf~new("java.awt.Button", "Inner east text from Object
Rexx"))
p~add("West", .bsf~new("java.awt.Button", "Inner west text from Object
Rexx"))
/* configure p a bit */
p~setBackground(.bsf~bsf.getStaticValue("java.awt.Color", "green"))
/* configure the frame that p is in */
f=p~getParent
f~setTitle("Hello from Object REXX (title reset from Object Rexx)")
::requires BSF.CLS -- get Object Rexx wrapper support for BSF
----------------- cut here -----------------
Hope that helps,
---rony
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