[Laszlo-user] Trying to assign events dynamically using delegates.

[Kenneth Miller]

All,

     Here's the error: ERROR @lz/button.lzx#35: Invalid delegate:  
button  text=Delete.test2 => «undefined» (must be a Function)

Regards,
Ken

On Jul 21, 2008, at 2:00 PM, Henry Minsky wrote:

> You can call a method on another object,  using a delegate, but you'd
> have to create the delegate to point to your object
>
> e.g.,
>
> new LzDelegate(yourinstance, "test2")
>
> Your delegate was created to call the test2 method on your button  
> instance. ...
>
>
>
> On Mon, Jul 21, 2008 at 2:59 PM, Henry Minsky <hminsky at laszlosystems.com 
> > wrote:
>> What is the error? Your test2 method is never getting called? Where  
>> is
>> the "test2" method being declared on
>> the button class?  Don't you need a subclass of button, in order to
>> define your method on it?
>>
>>
>> On Mon, Jul 21, 2008 at 2:40 PM, Kenneth Miller  
>> <xkenneth at gmail.com> wrote:
>>> I'm trying to create a new button here and attach an event to it,  
>>> can anyone
>>> tell me what I'm doing wrong?
>>>
>>> function create_part() {
>>>
>>>   //get the part name
>>>   part_name =
>>> canvas 
>>> .main_tabs 
>>> .buildout_editor 
>>> .buildout_toolbar.toolbar_slider.parts_tab.new_part_field.text
>>>
>>>   //add the part to the dom
>>>   buildout_dp.addNode(part_name)
>>>
>>>   //add it to the tab slider
>>>   canvas.main_tabs.buildout_editor.buildout_ts.addItem(part_name)
>>>
>>>   //wipe out the text field
>>>
>>> canvas 
>>> .main_tabs 
>>> .buildout_editor 
>>> .buildout_toolbar.toolbar_slider.parts_tab.new_part_field.text
>>> = ''"
>>>
>>>   //create the delete button
>>>   var delete_button = new
>>> lz 
>>> .button 
>>> (canvas.main_tabs.buildout_editor.buildout_ts.getItem(part_name))
>>>   delete_button.setAttribute('text','Delete')
>>>
>>>   //create the delegate
>>>   if ( typeof delete_button.del == "undefined" ) {
>>>   delete_button.del = new LzDelegate( delete_button, "test2");
>>>   }
>>>
>>>   //assign the event
>>>   delete_button.del.register( delete_button, "onclick" );
>>>
>>>   }
>>>
>>> Regards,
>>> Ken
>>>
>>>
>>
>>
>>
>> --
>> Henry Minsky
>> Software Architect
>> hminsky at laszlosystems.com
>>
>
>
>
> -- 
> Henry Minsky
> Software Architect
> hminsky at laszlosystems.com

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