callback to gadgets.util.registerOnLoadHandler is event that notify that gadget
infrastructure and it's container is ready. thus you can set handlers to
perform communication with parent window: set gadget's height, get stored state
gadget wave api is also using that handler to do it's internal init:
/**
* Internal initialization.
*/
wave.internalInit_ = function() {
wave.checkWaveContainer_();
if (wave.isInWaveContainer()) {
gadgets.rpc.register('wave_participants', wave.receiveWaveParticipants_);
gadgets.rpc.register('wave_gadget_state', wave.receiveState_);
gadgets.rpc.register('wave_state_delta', wave.receiveStateDelta_);
gadgets.rpc.register(
'wave_private_gadget_state', wave.receivePrivateState_);
gadgets.rpc.register(
'wave_private_state_delta', wave.receivePrivateStateDelta_);
gadgets.rpc.register('wave_gadget_mode', wave.receiveMode_);
gadgets.rpc.call(null, 'wave_enable', null, '1.0');
}
};
/**
* Sets up the wave gadget variables and callbacks.
*/
(wave.init_ = function() {
if (window['gadgets']) {
gadgets.util.registerOnLoadHandler(function() {
wave.internalInit_();
});
}
})();
at that time wave api initialize state object but it's null and then it
registers to opensocial rpc listeners which will transfer state deltas,
participants, etc. and only after that it will be able to receive any data
In my practice and according to wave api's asynchronous model you shouldn't
perform state actions until setStateCallback is fired for state and
setParticipantCallback for participants
On Wednesday, January 16, 2013 4:59:36 PM UTC+7, Zachary Yaro wrote:
>
> Why then would it happen in the gadgets.util.registerOnLoadHandler
> callback? The impression I got is that should not fire until the gadget
> has been fully loaded.
>
> —Zachary “Gamer_Z.” Yaro
>
>
> On 16 January 2013 02:42, Serj <[email protected] <javascript:>> wrote:
>
>> I don't think that this behavior is bug. This just means that at that
>> moment gadget haven't receive it's state yet.
>>
>>
>> On Wednesday, January 16, 2013 1:43:10 PM UTC+7, Zachary Yaro wrote:
>>>
>>> Funny enough, years later, I am now seeing this bug for the first time
>>> (in Chrome, in both Rizzoma and Wave-In-A-Box). I know it was a while ago,
>>> but did you ever find a solution?
>>>
>>> —Zachary “Gamer_Z.” Yaro
>>>
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>
>
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