[Panel-devel] Applet updating

[Petri Damsten]

Hi,

Trying to get applet update behave similarly whether data is ready in 
DataEngine::updateSource() or not. After all applet writer should not have to 
know how engine gets it's data.

1. Data might not be ready yet so don't call update yet. It gets called when 
engine calls setData. 

Should update be called at start if engine does not call setData at all?

2. Call source with createWhenMissing true so DataContainer gets created even 
if setData is not called in DataEngine::updateSource()

3. queue to true so updated gets called after first setData

4. Don't update if it's queued

Petri

-- 
A lecture is a process where information is passed from the notebook of the 
lecturer to the notebook of the student without necessarily passing through 
the minds of either.
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