[PyQt] Populate Model data in a separate thread

[Darryl Wallace]

Hello Detlev,

Where abouts in eric4 do you do perform this "lazy" population?  This 
interests me as I suffer from a similar table population slowdown.

Thanks,
Darryl

Detlev Offenbach wrote:
> Another solution would be to do lazy population of the model. That is, if 
> child items are to be shown, fetch them at that time. This avoids populating 
> the model in advance and is more responsive. See eric4 as an example.
>
> Detlev
>
> On Montag, 27. April 2009, Demetrius Cassidy wrote:
>   
>> How many items do you need to populate in your model class? Unless you are
>> populating a view with thousands of items, I do not suggest threads at all
>> since they can be dangerous if you do not know how to use them.
>>
>> If you absolutely needed to do this, my approach would be to have some sort
>> of method I could call on my dialog to fetch items in a separate thread in
>> the model, and once I have my data I could populate myself and call the
>> appropriate begin/end methods on my QAbstractItemModel class.
>>
>> If I knew what you were trying to accomplish, then maybe I could give you
>> some better guidance.
>>
>> Edwin Marshall-2 wrote:
>>     
>>> I've been reading on qtcentre that it is possible to populate a model
>>> from a separate qthread in order to prevent a program from freezing
>>> before it loads, however the example code I have seen is a bit too much
>>> involved (and in c++) for me to comprehend. I was wondering if anyone
>>> knew of a pyqt program that did, or could point me toward some code
>>> snippets doing this. The only thing that I can gather is that I need to
>>> create the qthread in the __init__ method of my model and call it's run
>>> command. However, I can't figure out what exactly need to go in the run
>>> method, or what signals to emit/catch. Thansk in advance for any help
>>>
>>>
>>>
>>>
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