[Laszlo-user] [BULK] Re: some simple questions from a new openlaszlo user

[jamesr]

I can state that you cannot override handlers, whose philosophy is one 
of hooking or extending events, not replacing them. That task is 
reserved for overriding methods, where the new method will replace any 
previous methods defined (unless you call the "super" construct to 
invoke the previously defined method in your overriding method)\

I think what you might be looking for is having your onclick handler 
invoke a method in the same class, and then that method in the class 
could be overridden by subclasses.

-jamesr

cem sonmez wrote:
Hi, as i said in my earlier post, i have some questions that are 
probably so simple for you.

1-) I have two classes like below.

<class name="chatView" extends="view" align="center">   
       
        <!--shared object for chat-->
        <sharedObjectChat id="soChat">
            <handler name="onconnected" reference="conn">
                //Debug.info("connected attribute operation, value 
:%w",conn.connectionOK);
                if (conn.connected) {
                    this.connect("chat", conn._conn, true);
                    this.so.client=this;
                }
            </handler>
        </sharedObjectChat>
...
</class>

<class name="login" extends="window">
<button name="loginButton" >Login
     <handler name="onclick"><![CDATA[
          *conn.connect('rtmp://127.0.0.1/fi6en' 
<http://127.0.0.1/fi6en%27>);*
          //Debug.info("connected attribute operation, value 
:%w",conn.connected);
          *soChat.send("writeInfo", username + " logged in");*
     </handler>
....
</button>

in the chatView class definetion, i am creating the soChat object 
depend on the connection status of *conn*.
The problem causes at the lines that i have made bold. in the 
debugger, i see that soChat.send() method is being called before the 
connected message of the conn object and getting flash runtime error 
as expected *Error 1009 : *Cannot access a property or method of a 
null object reference. .
And later i see that i can use the soChat  clearly.

So my goal is to delay the soChat.send() method depend on the message 
NetConnection.Connect.Success. Is there any way to do something for this.


2-)
Is it possible to override a handler of an element in a class object.
For the clarification :

<class name="registerNewUser" extends="window" title="Register">
    <button name="registerButton">Register
           <handler name="onclick">
               Debug.info('Username : %w', classroot.getUsername());
               ....
           </handler>
    </button>
....
</class>

<canvas>
    <registerNewUser name="registerWindow">
*                // here i want to override the onclick handler of the 
registerButton button*
   </registerNewUser>
</canvas>


3-) Actually, this is not a specific question:) I am not sure that 
somebody has the same idea with me, but it takes a long time to 
organize the visual elements in openlaszlo.
At this situation, i strongly need a visual openlaszlo editor. Max 
recommended me one, named "dragn", but i got some problems on 
installing  and running issues.
For openlaszlo-dev team: do you have any plan for developing an 
openlaszlo IDE as the developer team.

Thanks
--
Cem SONMEZ