Mouse click vs drag

[Petteri Hintsanen <petterih@iki.fi>]

Hello,

I have a high resolution ("4K") display and I’m struggling with mouse
clicks.  They seem to get mixed up with mouse drag events.  If I
understand mouse click logic correctly, button press + button release
events generate a click event only when the cursor is at the same screen
location during press and release.  Otherwise it is a drag event.

Clicks are difficult to achieve with hires display, because the mouse
cursor tends to move a couple of pixels or so when pressing and
releasing mouse buttons.  Eg. in Customize buffers it is difficult to
push "Apply" or "Apply and Save" buttons.

Is there some kind of fuzziness parameter to tune, like
double-click-fuzz?  Would it make sense to have one?

Thanks,
Petteri