[Laszlo-dev] Fwd: [JIRA] Created: (LPP-4632) Dataset doesn't send oninit event

[Henry Minsky]

[I wanted to bring this to the whole team for discussion/consensus]


You bring up an issue that I've wondered about for a while; should a
dataset always send an ondata event in every case?

 Currently, 'static' datasets (i.e. datasets with
compile-time-specified literal data) do not
send ondata events when they are initialized. I preserved this
behavior  in LPS 4 from previous versions of LPS, but I was never sure
if that was the right semantics.

In the example you give, your dataset is 'static', i.e., it is not an
HTTP request or other dynamic loading of data.  So it seems to me that
"doRequest()" method should not
really do anything at all.  In this case, you could send the data
event manually, but that
seems like a kludge as well:


  <dataset name="mydset" request="true">
        <!-- oninit handler doesn't fire either -->
        <handler name="oninit">
            this.ondata.sendEvent(this.data);
        </handler>
    </dataset>

So maybe we should make all  'static' datasets send an ondata event
when they are initialized? Or make an explicit method which forces a
"ondata" event? I just am not sure
that overloading doRequest() is the right thing to do....






---------- Forwarded message ----------
From: Pablo Kang (JIRA) <jira at laszlosystems.com>
Date: Sep 2, 2007 5:45 PM
Subject: [JIRA] Created: (LPP-4632) Dataset doesn't send oninit event
To: hminsky at laszlosystems.com


Dataset doesn't send oninit event
---------------------------------

                 Key: LPP-4632
                 URL: http://www.openlaszlo.org/jira/browse/LPP-4632
             Project: OpenLaszlo
          Issue Type: Bug
          Components: LFC - Data
    Affects Versions: 4.0.3
            Reporter: Pablo Kang
         Assigned To: Henry Minsky


This in turn doesn't fire doRequest if request="true".

<canvas debug="true">

    <handler name="oninit">
        Debug.write('canvas init');
    </handler>

    <!-- request set to true but doRequest doesn't fire -->


</canvas>

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-- 
Henry Minsky
Software Architect
hminsky at laszlosystems.com