On 22.12.2014 17:11, Phil Thompson wrote:
On 22/12/2014 3:38 pm, Matic Kukovec wrote:
Hi guys,
I'm using PyQt 4.9.4 (Windows) which has QScintilla version 2.6.1 and
have noticed that there is significant
lag on scrolling in documents with a large number of long lines, more
than 400 characters.
In QScintilla 2.8.1 (PyQt 4.11 on Windows) the lag is completely gone.
Can anyone tell me what was upgraded and where in the source code that
fixed this scroll lag?
I suggest you do a diff of the Qt4Qt5 directories.
Phil
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Hi Phil,
I did some additional testing and the fix happens from version 2.7.1 to
2.7.2.
I looked into the differences in the Qt4Qt5 directory and the only
significant difference
is in the file PlatQt.cpp, more specifically in the
"SurfaceImpl::MeasureWidths" and
"SurfaceImpl::metrics" function and function "SurfaceImpl::convertQFont"
was added.
I don't know the code, could you tell me what these functions are used for?
Thanks,
Matic
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