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

[Kenneth Miller]

All,

     Awesome! Works! Thanks everyone!

Regards,
Ken

On Jul 21, 2008, at 4:22 PM, P T Withington wrote:

> I think you are misunderstanding delegate:  http://labs.openlaszlo.org/trunk-nightly/docs/reference/LzDelegate.html
>
> If test2 is a method on the canvas and you want to invoke it when  
> button is clicked, you would say:
>
>  new LzDelegate(canvas, 'test2', delete_button, "onclick")
>
>
> On 2008-07-21, at 16:49EDT, 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> 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 
>>>> >
>>>> 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
>>>>
>>>>
>>>
>>>
>>>
>>> -- 
>>> Henry Minsky
>>> Software Architect
>>> hminsky at laszlosystems.com
>>
>

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