[kate] [Bug 391518] Cursor width in Kate gets narrower every 16 characters

[Oleh Prypin]

https://bugs.kde.org/show_bug.cgi?id=391518

Oleh Prypin  changed:

   What|Removed |Added

 CC||o...@pryp.in

--- Comment #3 from Oleh Prypin  ---
For me, the cursor appears thinner only at columns 1, 65, 129, ...
Another person reported the same (this was in IRC)

I'd like to note that I would prefer this to be fixed in the direction of
making the cursor always thinner, rather than always thicker.

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[kate] [Bug 391518] Cursor width in Kate gets narrower every 16 characters

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=391518

--- Comment #2 from aryan10jan...@gmail.com ---
I'm able to reproduce this bug and I will try to fix the issue.

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[kate] [Bug 391518] Cursor width in Kate gets narrower every 16 characters

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=391518

aryan10jan...@gmail.com changed:

   What|Removed |Added

 CC||aryan10jan...@gmail.com
   Assignee|kwrite-bugs-n...@kde.org|aryan10jan...@gmail.com

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[kate] [Bug 391518] Cursor width in Kate gets narrower every 16 characters

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=391518

Christoph Feck  changed:

   What|Removed |Added

   Keywords||junior-jobs

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[kate] [Bug 391518] Cursor width in Kate gets narrower every 16 characters

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=391518

Christoph Feck  changed:

   What|Removed |Added

 Status|UNCONFIRMED |CONFIRMED
 Ever confirmed|0   |1

--- Comment #1 from Christoph Feck  ---
The issue is that QTextLayout uses QPainter::RasterOp_NotDestination, which
means all pixels that are affected by the cursor rect get inverted. Since the
cursor rect is positioned at fractional positions, usually 3 instead of 2
pixels get inverted.

I suggest to use setRenderHint(QPainter::Antialiasing, false) for the cursor.
This way, the rect rasterization will be pixel-aligned and only the intended 2
pixels get inverted.

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