[Interest] Further 4.X releases?

Scott Aron Bloom scott.bloom at onshorecs.com
Wed Feb 13 05:27:25 CET 2013

One possible solution...

Rather than making the proxy_to_source functions always based on an index.. Give access to the source_rows and source_columns data via direct calls..

And use that for the header data.


From: interest-bounces+scott.bloom=onshorecs.com at qt-project.org [mailto:interest-bounces+scott.bloom=onshorecs.com at qt-project.org] On Behalf Of Scott Aron Bloom
Sent: Tuesday, February 12, 2013 8:24 PM
To: qt-interest (interest at qt-project.org)
Subject: Re: [Interest] Further 4.X releases?

Further investigation into the bug...

In QAbstractProxyModel::headerData, it creates a proxyIndex to map the requested section into the source section.

Unfortunateluy, the call proxyIndex = index( 0, section ) assumes there is a row 0, ie, a non-empty model.

The proxyIndex is set to an invalid index (-1, -1), hence the sourceSection is determined to be -1...

Thus the call to the sourceModels headerData on the section returns 0

The workaround, for my custom filter model is to simply skip the proxy model for the header data and just call the sourcemodel since I know I don't filter based on columns.

Based on my analysis, I do not think its limited to QSqlTableModel as much as it will occur when ever the source model has NO rows.

From: interest-bounces+scott=onshorecs.com at qt-project.org<mailto:interest-bounces+scott=onshorecs.com at qt-project.org> [mailto:interest-bounces+scott=onshorecs.com at qt-project.org] On Behalf Of Scott Aron Bloom
Sent: Tuesday, February 12, 2013 8:09 PM
To: qt-interest (interest at qt-project.org<mailto:interest at qt-project.org>)
Subject: [Interest] Further 4.X releases?

So here is my problem, I have found a bug when QSortFilterProxyModel with a QSqlTableModel as the source model.
The problem, I currently at a 4.8 based system, and the plan for 5.0 migration isnt soon...

Will there be another 4.8 or in order to get a fix, I have to submit it against 5.X and Ill never see a fix I can use till I move to 5.X?

The bug, btw, if the orignal SQL model has zero results, the horizontal header goes to all "0" because the filter proxy model doesn't do the proper mapping for headers from the record.

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