[okular] [Bug 506684] New: Delay for displaying text when hovering highlight/popup notes.

[Thomas Bernat]

https://bugs.kde.org/show_bug.cgi?id=506684

            Bug ID: 506684
           Summary: Delay for displaying text when hovering
                    highlight/popup notes.
    Classification: Applications
           Product: okular
      Version First 25.04.1
       Reported In:
          Platform: Ubuntu
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: tbernat82 at gmail.com
  Target Milestone: ---

I am experiencing delays of variable length in the display of text when I hover
highlighted text with notes or popup notes. I would expect rather instantaneous
display, especially for short text (a few lines), which is the standard use
case.

STEPS TO REPRODUCE
1.  Highlight text and add a note, or create a popup note, and add some text.
Do this a second time.
2.  Put the mouse cursor over the first note.
3.  Remove the mouse cursor from the first note, put the mouse cursor over the
first note again or over the second note.
4. Navigate slightly through the pdf keeping the two notes in sight. Repeat
steps 2 and 3.

OBSERVED RESULT
Step 2: The text is displayed only after 1 second. 
Step 3: Actually, if one does not scroll through the pdf, when hovering a
second time the same note, or hovering for the first time the other note, the
waiting time is much shorter, much more satisfactory. 
Step 4: If one navigates through the pdf, even staying on the same page, the
behavior is reset: one has to wait for about 1 second to view the text on any
note by hovering, and hovering again the same or another note without
navigating in the pdf displays the text almost immediately.

EXPECTED RESULT
The text should appear instantaneously

SOFTWARE/OS VERSIONS
Ubuntu 24.04. 1 LTS

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