[KDE/Mac] Review Request 126308: KPushButton: respect SH_DialogButtonBox_ButtonsHaveIcons, also when drawing

[René J.V. Bertin]

> On Dec. 19, 2015, 11:23 a.m., David Faure wrote:
> > src/kdeui/kpushbutton.cpp, line 256
> > <https://git.reviewboard.kde.org/r/126308/diff/6/?file=421676#file421676line256>
> >
> >     This patch looks wrong because KPushButton can be used outside of "dialog button boxes", while the styleHint is supposed to be only about dialog button boxes.
> >     
> >     QPushButton::sizeHint does this:
> >         bool showButtonBoxIcons = qobject_cast<QDialogButtonBox*>(parentWidget())
> >                               && style()->styleHint(QStyle::SH_DialogButtonBox_ButtonsHaveIcons);
> >     which is a solution for testing the parent widget.
> >     
> >     I still don't fully understand the issue though, at painting time both QPushButton and KPushButton call QStyle's CE_PushButton, so I don't see why these two would be working differently.
> >     Is this a workaround for KPushButton which doesn't fix QPushButton?

David, I'm dropping this whole RR, leaving it open only in case Thomas wants to pursue his view on fixing what there is to fix.

You are right though, it's a workaround for KPushButton which doesn't depend on fixing QPushButton. And whether or not QPushButton requires fixing is apparently the big question. What is your idea on the scope of `ShowIconsOnButtons`?


- René J.V.


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On Dec. 11, 2015, 5:26 p.m., René J.V. Bertin wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/126308/
> -----------------------------------------------------------
> 
> (Updated Dec. 11, 2015, 5:26 p.m.)
> 
> 
> Review request for KDE Software on Mac OS X, KDE Frameworks, Qt KDE, Hugo Pereira Da Costa, and Yichao Yu.
> 
> 
> Repository: kdelibs4support
> 
> 
> Description
> -------
> 
> KF5 applications have long had a habit of drawing icons on buttons even when this feature was turned off in the user's setting. This was mostly noticeable in applications built on kdelibs4support.
> 
> It seems that the actual culprit is in Qt's QPushButton implementation (https://bugreports.qt.io/browse/QTBUG-49887), but it is possible to work around it in `KPushButton::paintEvent`, by removing the icon (forcing it to the null icon) in the option instance, before handing off control to the painter.
> 
> 
> Diffs
> -----
> 
>   src/kdeui/kdialogbuttonbox.cpp 0f6649b 
>   src/kdeui/kpushbutton.cpp 98534fa 
> 
> Diff: https://git.reviewboard.kde.org/r/126308/diff/
> 
> 
> Testing
> -------
> 
> On Kubuntu 14.04 and OS X 10.9.5 with Qt 5.5.1 and KF5 frameworks 5.16.0 .
> 
> I have not yet verified if there are other classes where this modification would be relevant too.
> 
> 
> Thanks,
> 
> René J.V. Bertin
> 
>

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