Review Request 126993: drkonqi : fix build errors and build nongui

[Martin Gräßlin]

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drkonqi/drkonqi.cpp (lines 179 - 184)
<https://git.reviewboard.kde.org/r/126993/#comment62826>

    yes this is possible and there is even a Krazy check for this. The QWeakPointer is the proper fix to this problem.
    
    What exactly was the compile issue you run into with the QWeakPointer?
    
    I assume that:
       QWeakPointer<QFileDialog> dlg(new QFileDialog(parent, defname));
    
    would solve your compile error.


- Martin Gräßlin


On Feb. 5, 2016, 3:13 p.m., René J.V. Bertin wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/126993/
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> 
> (Updated Feb. 5, 2016, 3:13 p.m.)
> 
> 
> Review request for KDE Software on Mac OS X and Plasma.
> 
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> Repository: plasma-workspace
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> 
> Description
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> 
> While looking to build DrKonqi for OS X/MacPorts I came across a few issues that appear to be syntax/coding errors that, surprisingly, were never caught before given that they also caused compile failures when I used the same configure/build/packaging script on Linux.
> 
> The code uses methods that no longer exist in Qt 5.5+ : `QString::fromAscii()`, `QHeaderView::setResizeMod()` (replaced with `QHeaderView::setSectionResizeMode()` and `QInputDialog::getInteger()` (instead of `QInputDialog::getInt()`). Those are the easy and straightforward ones fixed by this patch.
> 
> The handling of file dialogs (in 2 locations) was more problematic. Both Apple's clang "6.0.0" and gcc 5.3 (on Linux) refused statements like `QWeakPointer<QFileDialog> dlg = new QFileDialog(parent,defname);` . My initial attempt was to follow the documentation for QWeakPointer, and do `QWeakPointer<QFileDialog> dlg = QSharedPointer<QFileDialog>(new QFileDialog(parent,defname));` but that caused a crash as soon as I clicked on the "save backtrace as" button - on both platforms.
> It turned out that `QSharedPointer<QFileDialog>()` returned a valid (non-null) shared pointer, but after creating a QWeakPointer from it, `dlg.data()` returned NULL -- immediately.
> 
> I had a look around in the 5.17.0 frameworks codebase, and could find no relevant examples of using QWeakPointer; some expressions appear to be equivalent to the original DrKonqi code, in other locations QWeakPointer instances are indeed created "going through" a QSharedPointer. In the end I tested using QFileDialog (and `QFileDialog::selectedUrls()` as kate5 does, and that works (on OS X and Linux).
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> That's what the attached patch does: no QFileDialog pointer at all, just an instance.
> This RR is intended to fuel a discussion on the subject, as suggested by Aleix; therefore I left the comment about the possibility of invalidating/deleting the file dialog e.g. through a DBus call. Is that actually a possibility, and why wouldn't it be in Kate? Are there no other ways to prevent it, or check for its occurrence?
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> This patch also marks drkonqi as a nongui executable, a requirement on OS X and which shouldn't cause any regressions elsewhere AFAIK.
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> 
> Diffs
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>   drkonqi/CMakeLists.txt deb8c40 
>   drkonqi/bugzillaintegration/bugzillalib.cpp 802c5fb 
>   drkonqi/bugzillaintegration/reportassistantpages_bugzilla.cpp e60fb14 
>   drkonqi/bugzillaintegration/reportassistantpages_bugzilla_duplicates.cpp 4f8f4ea 
>   drkonqi/drkonqi.cpp b12c118 
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> Diff: https://git.reviewboard.kde.org/r/126993/diff/
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> Testing
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> On OS X 10.9.1 and Kubuntu 14.04, both with Qt 5.5.1 and KF5 5.17.0 installed into /opt/local
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> 
> Thanks,
> 
> René J.V. Bertin
> 
>

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