[kfile] [Bug 223937] Scrolling with mouse wheel is too fast in large-icon-sized dialog boxes

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=223937

Nate Graham  changed:

   What|Removed |Added

 Blocks||86838


Referenced Bugs:

https://bugs.kde.org/show_bug.cgi?id=86838
[Bug 86838] Switch to icons-on-top mode by default for Short View
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[kfile] [Bug 223937] Scrolling with mouse wheel is too fast in large-icon-sized dialog boxes

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=223937

Nate Graham  changed:

   What|Removed |Added

   Keywords||junior-jobs, usability
 CC||n...@kde.org
 Ever confirmed|0   |1
 Status|UNCONFIRMED |CONFIRMED
   See Also||https://bugs.kde.org/show_b
   ||ug.cgi?id=386379
Summary|Scrolling with mouse wheel  |Scrolling with mouse wheel
   |is uncomfortable in |is too fast in
   |large-icon-sized dialog |large-icon-sized dialog
   |boxes   |boxes

--- Comment #2 from Nate Graham  ---
Same issue as Dolphin's Icons view; see Bug 386379.

Here's the problem:
1. With a wheel, scroll speed is determined by the number of "lines" to scroll
per scroll wheel "tick"
2. Icon size determines the height of each line
3. With huge icons, only a small number of them will be visible at once given
the necessarily somewhat small size of the file open/save dialog


Therefore when the icons are huge, scrolling  one "tick" will advance too
quickly.

The same fix is required here: use a smaller *effective* line height for the
purpose of mouse wheel scrolling when icons are huge.

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