Review Request 127354: improve drawing precision for circles

[Maurizio Paolini]

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Committed with minimal changes.  Removing usage of QRect in kigpainter must wait the cleanup of the
overlays, most probably no longer used.

- Maurizio Paolini


On March 19, 2016, 9:05 a.m., Maurizio Paolini wrote:
> 
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> https://git.reviewboard.kde.org/r/127354/
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> (Updated March 19, 2016, 9:05 a.m.)
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> 
> Review request for KDE Edu, David Narváez and Rex Dieter.
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> 
> Bugs: 359805
>     http://bugs.kde.org/show_bug.cgi?id=359805
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> Repository: kig
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> Description
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> QRect object in qt uses integers.  This causes annoying loss of drawing precision when drawing circles (https://bugs.kde.org/show_bug.cgi?id=359805).  Using the QRectF object seems more appropriate.
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> 
> Diffs
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> 
>   misc/kigpainter.h e36c153 
>   misc/kigpainter.cpp e547bf2 
>   misc/screeninfo.h b7f94c4 
>   misc/screeninfo.cc 8fdf115 
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> Diff: https://git.reviewboard.kde.org/r/127354/diff/
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> 
> Testing
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> This is a minimal patch to allow using QRectF when drawing circles.  Perhaps using QRect
> (and QPoint) could be dropped completely in favour of QRectF and QPointF.
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> File Attachments
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> 
> tangent circles - old behaviour
>   https://git.reviewboard.kde.org/media/uploaded/files/2016/03/19/48f5447f-0904-43ee-8c56-8fc07c03febb__circles_old.png
> tangent circles: new behaviour
>   https://git.reviewboard.kde.org/media/uploaded/files/2016/03/19/5684b1c5-c32c-447b-bed6-53be380f1b87__circles_new.png
> zoom of old behaviour
>   https://git.reviewboard.kde.org/media/uploaded/files/2016/03/19/08937b54-e313-4acf-b482-4bd899d24b30__circles_old_zoom.png
> zoom of new behaviour
>   https://git.reviewboard.kde.org/media/uploaded/files/2016/03/19/e7c0b8fb-af81-43da-b70e-bed3462d73a6__circles_new_zoom.png
> 
> 
> Thanks,
> 
> Maurizio Paolini
> 
>

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