[Laszlo-dev] Generic notifying events [Was: For Review: Change 20090427-hqm-Q Summary: fix for swf9 context menus, mouseEnabled no longer always set to true on every sprite]

[P T Withington]

On 2009-04-28, at 16:38EDT, Max Carlson wrote:

> P T Withington wrote:
>> On 2009-04-28, at 16:16EDT, Max Carlson wrote:
>>>> So all you have to do is make your own declared event instance to  
>>>> initialize your event to, you don't have to make a separate class.
>>>
>>> How would this work in declarative syntax?
>> Give me an example of where you would need it and I will tell you.   
>> The only places I could think of using this is internally when  
>> connecting events to the runtime, because the runtime only accepts  
>> callbacks and you would like to not register a callback that is  
>> going to be a no-op because the corresponding event is not ready.   
>> In declarative code, setAttribute is already optimized to do  
>> nothing if the corresponding event is not ready.

Well, just in case, we could do something like this:

<class name="myFunnyEventine" extends="event">
   <method name="onReadyChange" args="newValue">
     if (newValue) {
       // you have listeners...
     } else {
       // now you don't...
     }
   </method>
</class>

<event name="sometimesMaybe" type="myFunnyEventine" />

And the event compiler would compile that to:

   var sometimesMaybe = new LzDeclaredEvent(myFunnyEventime);

And you're done.  Power tool, use with extreme caution.

---

Anyone got a better name than `onReadyChange`?