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List:       kde-artists
Subject:    [kde-artists] Re: Oxygen Tab Widgets.
From:       Alexis_Ménard <menard () kde ! org>
Date:       2011-04-19 18:58:16
Message-ID: BANLkTinS4RQ2ygrKX_V0tBZDrhEQ_whw_Q () mail ! gmail ! com
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On Tue, Apr 19, 2011 at 2:24 PM, Alexis Ménard <menard@kde.org> wrote:
> On Tue, Apr 19, 2011 at 2:00 PM, Hugo Pereira Da Costa
> <hugo@oxygen-icons.org> wrote:
>> Hi again Alex,
>>
>> Just had a first look at your patch.
>>
>> From my experience, the bug is triggered as soon as base_overlap is larger
>> than the default frame size. namely, you can set the guy to 2 (instead of 0),
>> as is done in QCommonStyle, and your dummy example repaints as expected.
>
> Not sure to get what you say :D

It works but add a little margin under the tab bar. I don't mind myself :D.
>
> a diff perhaps will help me :D.
>
>>
>> You confirm ?
>>
>> Hugo
>>
>>> Hello Hugo,
>>>
>>> So I looked a bit inside Oxygen.
>>>
>>> I did a patch (which is wrong because it does not fix all the cases
>>> for QTabWidget) but seems to give almost the same look as before but
>>> fix the scrolling issue by avoiding overlap.
>>>
>>> Attached 3 screenshots:
>>>
>>> - The original one (today) (number1)
>>> - With your line commented (number2)
>>> - With my patch (number3)
>>>
>>> Also if I comment the line you said nothing happen because the overlap
>>> is used somewhere else. If I put no overlap like in the second diff
>>> attached a margin appears on top of the content.
>>>
>>> What do you think?
>>>
>>> On Mon, Apr 18, 2011 at 7:05 AM, Hugo Pereira Da Costa
>>>
>>> <hugo@oxygen-icons.org> wrote:
>>> > On Monday 18 April 2011 12:04:21 Hugo Pereira Da Costa wrote:
>>> >> On Monday 18 April 2011 11:49:52 Hugo Pereira Da Costa wrote:
>>> >> > Hello Alexis,
>>> >> >
>>> >> > So I did some digging, and well, I'm not sure I have the skills to fix
>>> >> > myself either.
>>> >> >
>>> >> > This "overlap" thing, corresponds to what QStyle::pixelMetrics(
>>> >> > PM_TabBarBaseOverlap ) should return (so Qt knows about it).
>>> >> >
>>> >> > it is used in these two methods
>>> >> >
>>> >> > Oxygen::Style::tabWidgetTabPaneRect
>>> >> > Oxygen::Style::tabWidgetTabContentsRect
>>> >> >
>>> >> > which are what's called (by Qt) via
>>> >> >
>>> >> > QStyle::subElementRect( SE_TabWidgetTabContents )
>>> >> > QStyle::subElementRect( SE_TabWidgetTabPane )
>>> >> >
>>> >> > Looking at QCommonStyle implementation for the two above, well, they
>>> >> > don't differ 'much' in terms of metrics handling. (in fact I remember
>>> >> > copying them, and "tuning" them with +/-1 pixels here and there to fix
>>> >> > some bugs when dealing with corner cases of QTabWidget/KTabWidget
>>> >> > handling).
>>> >> >
>>> >> > QTabWidget is (by far) the most painful widget to deal with in styling
>>> >> > land and I've already spend hours (tenth's of hours) on it. (notably,
>>> >> > there is no existing Qt Style that does not have one bug or another
>>> >> > with it, in one possible or the other).
>>> >> >
>>> >> > I'm ok to revisit it in view of the problem you raise, but this will
>>> >> > take time (and my hand are pretty full at the moment).
>>> >> >
>>> >> > Feel free to file an actual bug report to oxygen (style) with as much
>>> >> > detail as you can so that it does not get lost in translation.
>>> >> >
>>> >> > Cheers,
>>> >> >
>>> >> > Hugo
>>> >>
>>> >> PS: I don't have (yet) a Debug build of Qt.
>>> >> Could you check if the bug persist if you comment the two lines:
>>> >>
>>> >>             case SE_TabWidgetTabContents: return
>>> >> tabWidgetTabContentsRect( option, widget );
>>> >>             case SE_TabWidgetTabPane: return tabWidgetTabPaneRect(
>>> >> option, widget );
>>> >>
>>> >> in oxygenstyle.cpp ?
>>> >> this should fallback to QCommonStyle implementation, will raise more
>>> >> bugs in some applications, but might give me more clue about what's
>>> >> going wrong.
>>> >>
>>> >> (note: maybe you can also try just commenting the first)
>>> >
>>> > argh. Sorry. I meant: just the second, namely
>>> > case SE_TabWidgetTabPane: return tabWidgetTabPaneRect( option, widget );
>>> >
>>> > They should be around line 880 and 881
>>
>
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