[okular] [Bug 443819] Ctrl+Scroll to zoom is incompatible with inertia touchpads

[Roberto]

https://bugs.kde.org/show_bug.cgi?id=443819

--- Comment #2 from Roberto <r087r70 at yahoo.it> ---
Maybe I did not explain myself clearly. The problem occurs when one scrolls
fast with the touchpad and then raises the hand so that due to inertia the page
keeps scrolling. During such inertia scrolling (withouth any touchpad contact),
if one presses ctrl (for example ctrl+f to find some text, or other shortcuts
with ctrl) the page becomes huge or minute, depending on the scroll direction.

*inertia* triggering zoom is definitely not "what it is supposed to do",
because one cannot control the zoom level in that way.

I see two ways to solve this bug:

1) ctrl+scroll shortcut to zoom acting only until fingers are in contact with
the touchpad

2) provide an option to disable ctrl+scroll to zoom the page

I think the second way is clean and simple, and I would vote for it.

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