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Old 10-12-2019, 11:15 AM   #1
Phssthpok
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Blinking white dot above/left of cursor?

I've just upgraded to Calibre 4, and suddenly in the editor I see a blinking white dot at the top of the line containing the cursor. When the cursor is positioned in front of the first character pf the line, the dot is at the top left of the leftmost character in the (gray) line number column. As I move the cursor right, the dot moves right. It maintains the same distance from the cursor (so in a file with <1000 lines where the line number column is 3 chars wide, it is 3 chars left of the cursor; with files with >1000 lines it is 4 chars left of the cursor). It blinks at about 2Hz (faster than the cursor blink rate). It's only really noticeable on the gray background of the line number column, but it's a bit irritating, and I get multiple dots all flashing away as the cursor moves.

Same hardware/OS as before when I was running Calibre 3, so: Is this some artefact of the new Qt library I'm seeing, or what?
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Old 10-12-2019, 11:40 AM   #2
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Quote:
Originally Posted by Phssthpok View Post
I've just upgraded to Calibre 4, and suddenly in the editor I see a blinking white dot at the top of the line containing the cursor. When the cursor is positioned in front of the first character pf the line, the dot is at the top left of the leftmost character in the (gray) line number column. As I move the cursor right, the dot moves right. It maintains the same distance from the cursor (so in a file with <1000 lines where the line number column is 3 chars wide, it is 3 chars left of the cursor; with files with >1000 lines it is 4 chars left of the cursor). It blinks at about 2Hz (faster than the cursor blink rate). It's only really noticeable on the gray background of the line number column, but it's a bit irritating, and I get multiple dots all flashing away as the cursor moves.

Same hardware/OS as before when I was running Calibre 3, so: Is this some artefact of the new Qt library I'm seeing, or what?
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Old 10-12-2019, 12:47 PM   #3
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Looks like a bug in QT.
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Old 10-12-2019, 05:57 PM   #4
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Quote:
Originally Posted by Phssthpok View Post
… Same hardware/OS as before when I was running Calibre 3…
Which is what ?

BR
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Old 10-12-2019, 10:03 PM   #5
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I certainly have not added code to render white dots in the interface.
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Old 10-13-2019, 06:09 AM   #6
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Originally Posted by BetterRed View Post
Which is what ?

BR
Win10, Calibre 64 bit.

I presume it's a Qt thing.
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Old 10-13-2019, 06:12 AM   #7
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Quote:
Originally Posted by kovidgoyal View Post
I certainly have not added code to render white dots in the interface.
No, I didn't think you had!

Where should I report Qt bugs? And is there any point, since they didn't fix other issues such as NBSPs at the start of an editor line making characters not show up in the display?
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Old 10-13-2019, 11:13 AM   #8
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bugreports.qt.io is the place and yeah they dont exactly have a stellar track record with bug fixing.
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Old 10-13-2019, 04:13 PM   #9
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Quote:
Originally Posted by Phssthpok View Post
Win10, Calibre 64 bit.

I presume it's a Qt thing.
It is a typical graphics adapter "thing" to get a flashing white dot adjacent to the cursor.

Set display scale to 100% and try changing everything you can, one at a time, in display settings (resolution, etc) and adapter settings (if any).

Maybe driver, but I doubt it.
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