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patch 8.2.4902: mouse wheel scrolling is inconsistent

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Problem:    Mouse wheel scrolling is inconsistent.
Solution:   Use the MS-Winows system setting. (closes #10368)
This commit is contained in:
LemonBoy
2022-05-07 12:25:40 +01:00
committed by Bram Moolenaar
parent 8e4b76da1d
commit c27747e6dd
7 changed files with 95 additions and 58 deletions
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21
runtime/doc/scroll.txt
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@ -237,31 +237,34 @@ it works depends on your system. It might also work in an xterm
|xterm-mouse-wheel|. By default only vertical scroll wheels are supported,
but some GUIs also support horizontal scroll wheels.
For the Win32 GUI the scroll action is hard coded. It works just like
dragging the scrollbar of the current window. How many lines are scrolled
depends on your mouse driver. If the scroll action causes input focus
problems, see |intellimouse-wheel-problems|.
On MS-Windows, if the scroll action causes input focus -problems, see
|intellimouse-wheel-problems|.
For the X11 GUIs (Motif and GTK) scrolling the wheel generates key
For Win32 and the X11 GUIs (Motif and GTK) scrolling the wheel generates key
presses <ScrollWheelUp>, <ScrollWheelDown>, <ScrollWheelLeft> and
<ScrollWheelRight>. For example, if you push the scroll wheel upwards a
<ScrollWheelUp> key press is generated causing the window to scroll upwards
(while the text is actually moving downwards). The default action for these
keys are:
<ScrollWheelUp> scroll three lines up *<ScrollWheelUp>*
<ScrollWheelUp> scroll N lines up *<ScrollWheelUp>*
<S-ScrollWheelUp> scroll one page up *<S-ScrollWheelUp>*
<C-ScrollWheelUp> scroll one page up *<C-ScrollWheelUp>*
<ScrollWheelDown> scroll three lines down *<ScrollWheelDown>*
<ScrollWheelDown> scroll N lines down *<ScrollWheelDown>*
<S-ScrollWheelDown> scroll one page down *<S-ScrollWheelDown>*
<C-ScrollWheelDown> scroll one page down *<C-ScrollWheelDown>*
<ScrollWheelLeft> scroll six columns left *<ScrollWheelLeft>*
<ScrollWheelLeft> scroll N columns left *<ScrollWheelLeft>*
<S-ScrollWheelLeft> scroll one page left *<S-ScrollWheelLeft>*
<C-ScrollWheelLeft> scroll one page left *<C-ScrollWheelLeft>*
<ScrollWheelRight> scroll six columns right *<ScrollWheelRight>*
<ScrollWheelRight> scroll N columns right *<ScrollWheelRight>*
<S-ScrollWheelRight> scroll one page right *<S-ScrollWheelRight>*
<C-ScrollWheelRight> scroll one page right *<C-ScrollWheelRight>*
This should work in all modes, except when editing the command line.
The value of N depends on the system. By default Vim scrolls three lines when
moving vertically, and six columns when moving horizontally. On MS-Windows
the amount of lines and columns for each scroll action is taken from the
system-wide settings.
Note that horizontal scrolling only works if 'nowrap' is set. Also, unless
the "h" flag in 'guioptions' is set, the cursor moves to the longest visible
line if the cursor line is about to be scrolled off the screen (similarly to