tclServiceMode             package:tcltk             R Documentation

Allow Tcl events to be serviced or not

Description:

     This function controls or reports on the Tcl service mode, i.e.
     whether Tcl will respond to events.

Usage:

     tclServiceMode(on = NULL)

Arguments:

      on: (logical) Whether event servicing is turned on. 

Details:

     If called with 'on == NULL' (the default), no change is made.

     Note that this blocks all Tcl/Tk activity, including for widgets
     from other packages.  It may be better to manage mapping of
     windows individually.

Value:

     The value of the Tcl service mode before the call.

Examples:

     ## see demo(tkcanvas) for an example
     ## Not run: 
         
         oldmode <- tclServiceMode(FALSE)
         # Do some work to create a nice picture.  Nothing will be displayed until...
         tclServiceMode(oldmode)
     ## End(Not run)
     ## another idea is to use tkwm.withdraw() ... tkwm.deiconify()

