Re: [Jython-users] HelloWorld for Jython 2.5 applets

[Marcos S. P. <msa...@gr...>]

You beat me with posting the actual code :-)

I am going to try to package your applet to use it from a browser.

El mié, 27-01-2010 a las 06:52 -0600, Josh Juneau escribió:
> Rasjid/Marcos-
> 
> 
> This approach has also crossed my mind.  I'd really like to implement
> something in the PlyJy project that would allow for one to create a
> Jython applet without worrying about the object factory design.  I
> started an implementation some time ago, but was never really able to
> embed the resulting applet into a webpage and make it work.  Perhaps
> with a little more time we can come up with a variant of my
> implementation that would make this approach usable. 
> 
> 
> So far, I've created a "test" facade which is actually a Java applet
> class which invokes the PythonInterpreter from within the init()
> method.  Basically, the Jython code is not really an applet in this
> approach, but rather just swing code that is added to this applet
> facade.  In the end, the facade would be the embedded applet and it
> would call to the Jython code to create the actual GUI.  The
> implementation I've started is not reusable and we'd have to take it a
> step further in order to make it so, but it is a start.
> 
> 
> AppletFacade.java - This is the actual (likely reusable at some point)
> applet that will become part of PlyJy.  In this hard-coded
> implementation I am instantiating a Jython module named "Ouch" which
> simply places a button on the applet.  Maybe this could be an abstract
> class in a reusable implementation.
> 
> 
> package org.plyjy.facade;
> 
> 
> import java.util.ArrayList;
> import java.util.List;
> import javax.swing.JApplet;
> import javax.swing.SwingUtilities;
> import javax.swing.JLabel;
> import org.plyjy.factory.JythonObjectFactory;
> import org.plyjy.factory.PySystemObjectFactory;
> import org.plyjy.interfaces.AppletType;
> 
> 
> public class AppletFacade extends JApplet {
> 
> 
>     private String appletClass = "Ouch";
>     private List argList = new ArrayList();
> 
> 
>     //Called when this applet is loaded into the browser.
>     @Override
>     public void init() {
>      
>         // Add a reference to this applet into our list...this will be
> passed to the Jython code
>         this.argList.add(this);
>         //Execute a job on the event-dispatching thread; creating this
> applet's GUI.
>         try {
>             SwingUtilities.invokeAndWait(new Runnable() {
>                 public void run() {
>                     PySystemObjectFactory factory = new
> PySystemObjectFactory(
>                     AppletType.class, appletClass, appletClass);
> 
> 
>                     AppletType app = (AppletType)
> factory.createObject();
> 
> 
>                     app.run_applet(argList);
>                  }
>             });
>             
>         } catch (Exception e) {
>             System.err.println("createGUI didn't complete successfully
> " + e);
>         }
>     }
> 
> 
>     public void setArgList(){
>         // Empty method to override...perhaps use to load values in
> reusable case?
>     }
> }
> 
> 
> 
> 
> AppletType.java - This is the interface which all Jython GUI code will
> need to implement in our solution
> 
> 
> package org.plyjy.interfaces;
> 
> 
> import java.util.List;
> 
> 
> public interface AppletType {
>     public void run_applet(List args);
> }
> 
> 
> 
> 
> Ouch.py - Adds a button to the applet.  We can create a GUI here and
> simply add it to the applet object which is passed in via the argList.
> 
> 
> import javax.swing as swing
> from org.plyjy.interfaces import AppletType
> 
> 
> class Ouch (AppletType):
> 
> 
>     def init(self):
>         # Probably do something else here....just a test
>         self.frame = None
>         self.button = None
>     
>     def print_message(self, event):
>         print "Ouch!"
> 
> 
>     def run_applet(self, *args):
>         arrayList = args[0]
>         self.frame = arrayList.get(0)
>         self.button=swing.JButton("Push Me!",
> actionPerformed=self.print_message)
>         self.frame.contentPane.add(self.button)
> 
> 
> 
> 
> Like I said, this approach runs fine on my desktop, but it doesn't
> work when I embed it into an HTML page.  Perhaps I just need to work a
> bit with it to make it happen.  I haven't committed this code to PlyJy
> as I wanted to make it function properly first.  However, perhaps it
> would be desirable for me to commit it so that others can work on it
> as well. :)  
> 
> 
> Is this the idea you had in mind Marcos?
> 
> 
> Best
> 
> 
> Josh Juneau
> jun...@gm...
> http://jj-blogger.blogspot.com
> http://www.jythonpodcast.com
> Twitter ID:  javajuneau
> 
> 
> 2010/1/26 Rasjid Wilcox <ra...@gm...>
>         2010/1/27 Marcos Sánchez Provencio <msa...@gr...>
>         
>                 But you can use a pythoninterpreter in your applet
>                 classes, can't you?
>                 You just have to include your py sources as resources.
>                 I have a test
>                 applet that adds 2+2 and show sys.version. In theory,
>                 you could add your
>                 jython java object factory to this mix...
>                 
>                 By the way, what is the minimal set of permissions for
>                 jython to work? I
>                 am testing with
>                 grant {
>                  permission java.security.AllPermission;
>                 };
>                 
>                 Rasjid, is that close to what you wanted?
>                 
>         
>         Yes, this approach occurred to me late last night.  If you can
>         share your test applet, that would be great, since I'd be kind
>         of working it out from scratch. (I have minimal exposure to
>         Java.)
>         
>         Cheers, Rasjid.
>         
> 
>