[Github-comments] [geany/geany] More precise scrolling on touchpads (#1425)

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If you use a touchpad, the mouse scroll distance is a float value, not just 1 or -1.
Currently when scrolling in geany, it scrolls 4 (in my experience) lines seriatim.
Instead you could use the float value to perform more fine scrolling (at least 1 line at once) and save the unused rest to a static variable.
For example when the static variable's value is -0.3 and the scroll distance is -0.2, the distance is firstly multiplied by that scroll factor 4, which gives -0.8, then the static variable is added. The result is -1.1, thus it scrolls one line up and the static variable becomes -0.1.

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https://github.com/geany/geany/issues/1425
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