Variable: double-click-time
double-click-time is a customizable variable defined in keyboard.c.
Value
500
Documentation
Maximum time between mouse clicks to make a double-click.
Measured in milliseconds. The value nil means disable double-click recognition; t means double-clicks have no time limit and are detected by position only.
In Lisp, you might want to use mouse-double-click-time instead of
reading the value of this variable directly.
Probably introduced at or before Emacs version 19.16.
Source Code
// Defined in /usr/src/emacs/src/keyboard.c
DEFVAR_LISP ("double-click-time", Vdouble_click_time,
doc: /* Maximum time between mouse clicks to make a double-click.
Measured in milliseconds. The value nil means disable double-click
recognition; t means double-clicks have no time limit and are detected
by position only.
In Lisp, you might want to use `mouse-double-click-time' instead of
reading the value of this variable directly. */);