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

[Cary Clark]

I think Henry's suggesting you change

delete_button.del = new LzDelegate( delete_button, "test2");
        to
delete_button.del = new LzDelegate( canvas, "test2");


The first parameter tells the delegate on which object it should run "test2".  
Obviously lz.button doesn't have one of those...your canvas does.


Cary

Kenneth Miller wrote:
> Why does it have to be defined "on" the button, it's defined in the 
> source, which you can view here. Thanks for your time.
>
> http://github.com/xkenneth/buildoutbuilder/tree/master/buildoutbuilder.laszlo/src
>
> buildoutbuilder.lzx is the file you're looking for.
>
> Thanks again!
>
> Regards,
> Ken
>
> On Jul 21, 2008, at 3:18 PM, Henry Minsky wrote:
>
>> Do you have a "test2" method defined on button? It would seem to me
>> that you don't, because you're instantiating
>> it right there, and there is no test2 method defined in the lz button
>> component class, that I know of..
>>
>>
>> On Mon, Jul 21, 2008 at 4:06 PM, Kenneth Miller <xkenneth at gmail.com 
>> <mailto:xkenneth at gmail.com>> wrote:
>>> 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 <mailto: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 
>>> <mailto: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 <mailto:hminsky at laszlosystems.com>
>>>
>>>
>>>
>>>
>>> --
>>> Henry Minsky
>>> Software Architect
>>> hminsky at laszlosystems.com <mailto:hminsky at laszlosystems.com>
>>>
>>>
>>
>>
>>
>> -- 
>> Henry Minsky
>> Software Architect
>> hminsky at laszlosystems.com <mailto:hminsky at laszlosystems.com>
>