[Qt-interest] Model/View delayed loading for large datasets

[Jugdish]

I should note that it only does this when my view derives from QTreeView.
When it derives from QTableView, it only requests the index for items in the
viewport. So something about QTreeView is causing it to traverse the first
column all the way to the bottom row.

On Wed, Feb 3, 2010 at 2:02 PM, Jugdish <jugdizh at gmail.com> wrote:

> Hmmm, even after enabling uniformRowHeights on the view, it still does the
> same thing. To clarify, it looks like the view is not actually requesting
> *every* model index; this is what it does:
>
> 1. get index for all columns of row 0
> 2. get index for all rows of column 0
> 3. get index for all rows/columns currently visible in the viewport
>
> So if I can find out how to stop it from doing step 2 I'd be happy.
>
>
> On Wed, Feb 3, 2010 at 1:50 PM, Andre Somers <andre at familiesomers.nl>wrote:
>
>> That may have to do with not setting the uniformRowHeights property. If
>> not set, the view needs to query each item to see how much space is
>> needed, and how long the scrollbar needs to become.
>>
>> André
>>
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>
>
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