[kde-edu]: Re: Adding KFontUtils to kdeui

[Jeremy Whiting]

Ok, I committed the latest version of Albert's patch, with some tweaking
(put it into KFontUtils namespace, and changed @since from 4.3 to 4.7).  I
also updated KAnagram to use this instead of libkdeeduui.  I'll do the same
to blinken tomorrow and then libkdeeduui can go away \o/.

BR,
Jeremy

On Tue, Jan 4, 2011 at 9:23 AM, Jeremy Whiting <jpwhiting at kde.org> wrote:

>
>
> On Mon, Jan 3, 2011 at 1:03 PM, Christoph Feck <christoph at maxiom.de>wrote:
>
>> I was asked to restate my position on this thread.
>>
>> 1. The namespace should be named KFontUtils as was the original intention.
>> This is in line with KColorUtils and avoids the confusion with
>> QFontMetrics. I
>> suggest to move it to kdeui/fonts/kfontutils.{cpp|h}.
>>
>
> I agree, ok will do.
>
>
>>
>> 2. I share Parkers concern that passing a QPainter to the function is
>> wrong.
>> The reason given was that Qt has a bug where creating a QFont or
>> QFontMetrics object for a specific paint device does not yield the same
>> metrics as when using a QPainter for that paint device (bug number?). Qt
>> bugs
>> should not be reflected in the design decisions of an API. I don't have
>> the
>> patch at hand right now to check which name we used, but I suggest the
>> signature to be KFontUtils::maxPointSizeF(const QFont &font, const QSizeF
>> &size, const QString &text).
>>
>
> As Albert stated in his last message on the previous thread:
>
> "It's not a Qt bug, as far as i understand QFontMetrics calculates how much
> the
> font is going to use based on font information, given the same font you
> should
> get the same value in windows, mac, linux. On the other hand, when you
> render
> on a QImage you get freetype (or harfbuzz not sure) on linux and probably a
>
> different render for Mac and for Windows, and even the used geometry is
> *very*
> close, it's usually off by 1 or 2 pixels with what QFontMetrics returns
> because on how hinting and other weird font things work.
> Please if someone with more Qt/font rendering knowledge thinks i'm wrong,
> just
> tell, but this is the behaviour i've been seeing since Qt3 times and afair
> it
> was always justified this way."
>
> So change the namespace and put into kdelibs/kdeui/fonts/ ?
>
> Best Regards,
> Jeremy
>
>>
>> Christoph Feck (kdepepo)
>>
>> On Saturday 01 January 2011 20:31:55 Albert Astals Cid wrote:
>> > A Dimarts, 28 de desembre de 2010, Jeremy Whiting va escriure:
>> > > Albert Astals Cid <aacid <at> kde.org> writes:
>> > > > > > Anyway it's obvious i'm too late on this, let's just wait for
>> KDE
>> > > > > > 4.4
>> > > > >
>> > > > > Maybe. I do not think I am in the position to stop you :) I have
>> to
>> > > > > agree with Parker that the current suggested patch does not feel
>> "Qt
>> > > > > way", though.
>> > > >
>> > > > Well, i've done all you both have suggested, so don't know what more
>> > > > you want.
>> > > >
>> > > > Anyway, let's stop this, makes no sense keep discussing for
>> something
>> > > > that maybe we'll never ship.
>> > > >
>> > > > Albert
>> > > >
>> > > > > > Albert
>> > >
>> > > Christoph, Albert, Others,
>> > >
>> > > I'd like to see this happen in the 4.7 timeframe (sooner than later)
>> > > especially because it will help kdeedu/libkdeedu/kdeeduui disappear,
>> > > which removes a dependency of a couple of kdeedu applications prior to
>> > > the migration to git.
>> > >
>> > > Thoughts about the last patches sent by Albert? otherwise I suggest we
>> > > move this class into kdelibs/kdeui where all kde applications can
>> > > benefit from it.
>> >
>> > I'm all for it, not sure if i fixed all of Christoph and Parker concerns
>> > though.
>> >
>> > Albert
>> >
>> > > Best Regards,
>> > > Jeremy
>>
>
>
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