Variable: double-click-fuzz
double-click-fuzz is a customizable variable defined in keyboard.c.
Value
3
Documentation
Maximum mouse movement between clicks to make a double-click.
On window-system frames, value is the number of pixels the mouse may have moved horizontally or vertically between two clicks to make a double-click. On non window-system frames, value is interpreted in units of 1/8 characters instead of pixels.
This variable is also the threshold for motion of the mouse to count as a drag.
This variable was added, or its default value changed, in Emacs 22.1.
Probably introduced at or before Emacs version 21.1.
Source Code
// Defined in /usr/src/emacs/src/keyboard.c
DEFVAR_INT ("double-click-fuzz", double_click_fuzz,
doc: /* Maximum mouse movement between clicks to make a double-click.
On window-system frames, value is the number of pixels the mouse may have
moved horizontally or vertically between two clicks to make a double-click.
On non window-system frames, value is interpreted in units of 1/8 characters
instead of pixels.
This variable is also the threshold for motion of the mouse
to count as a drag. */);