https://bugs.kde.org/show_bug.cgi?id=498038
Bug ID: 498038
Summary: Mouse wheel behavior beyond document limits in Okular
Classification: Applications
Product: okular
Version: 24.12.0
Platform: Neon
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: okular-devel@kde.org
Reporter: jose.ve...@urjc.es
Target Milestone: ---
SUMMARY
Okular stores the forward and backward movements of the mouse wheel beyond the
limits of the displayed document. If we are on the first page of a document and
scroll back 15 pages using the mouse wheel, the wheel will not scroll forward
until those 15 pages have been recovered. This effect is more noticeable when
the mouse wheel operates step by step, but it can be observed with any mouse.
STEPS TO REPRODUCE
1 - Open a PDF document in Okular.
2 - Use the mouse wheel to scroll up until reaching page 0, then continue
scrolling up (attempt to go to page -1 multiple times).
3 - After several upward scrolls beyond the document's first page, attempt to
scroll down to page 2 using the mouse wheel.
OBSERVED RESULT
Okular remains on page 0 and does not advance to the next pages until the
buffer of previous back-scroll actions is exhausted.
EXPECTED RESULT
Okular go to page 1 intermediately.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon 6.2
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1
ADDITIONAL INFORMATION
It has been observed with several mouses and with a laptop touch pad.
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