Am 04.01.2012 um 09:41 schrieb Jerry:

> 
> On Jan 3, 2012, at 11:36 PM, Stephan Witt wrote:
> 
>> Am 04.01.2012 um 01:28 schrieb Jerry:
>>>> 
>>>> To check if this is the culprit one may add the following line to your 
>>>> preferences file:
>>>> \force_paint_single_char false
>>>> On a Mac this is the file "~/Library/Application 
>>>> Support/LyX-2.0/preferences".
>>>> (Broken cursor placement for long lines should be one consequence.)
>>> 
>>> I've added the line that you suggest and the scrolling is improved--much 
>>> like or exactly like 2.0.1 scrolling that I commented on earlier in this 
>>> thread. And I see no problem with an incorrectly placed cursor.
>> 
>> Please, try it with a line of many "m" letters. Is the cursor placement at 
>> the end of the "m"-text correct?
> 
> Uh-oh. With 2.0.2 on my 15 inch MacBook Pro screen, using Cambria font, 
> screen zoom set to 140%, the cursor gets ahead of (to the right of) a 
> screenful of m's by about 1.5 cm as measured with an on-screen ruler. If I 
> then make the window smaller so that the line wraps, forcing the cursor to 
> near the left edge of the window, the error is quite small or none at all, 
> but as I continue to make the window even narrower, the error increases until 
> another line wrap, etc.

This is what I've expected.

> With 2.0.1, there is no cursor placement error.
> 
> Oddly, it no longer matters if the line
> \force_paint_single_char false
> is in the Preferences file--the behavior is now the same (faster scrolling, 
> misplaced cursor) with or without that line.

That's correct. The default for this (internal) preference depends on the 
Qt-Version.

Currently I'm looking for the optimal solution... including trying out the 
Qt-4.8.0 library...

Stephan

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