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Quit R by pressing button (tcltk) (PR#1475)

2 messages · strach.joachim@web.de, Peter Dalgaard

Original
strach.joachim@web.de
# 
Full_Name: Joachim H. Strach
Version: 1.3.1
OS: Windows 98 Second Edition
Submission from: (NULL) (132.230.131.220)


I am using the tcltk package.
Error-example:
----
  library(tcltk)
  top<-tktoplevel()
  but<-tkbutton(top,text="Quit",command=function() {q(save="no")} )
  tkpack(but)
----
then press the Quit-Button. 
On my Platform there will be a execution fault with following message:
----
RGUI verursachte einen Fehler durch eine ungültige Seite
in Modul TK83.DLL bei 0167:11450066.
Register:
EAX=8187f731 CS=0167 EIP=11450066 EFLGS=00010206
EBX=112e0000 SS=016f ESP=008dfa70 EBP=008dfa7c
ECX=43a00000 DS=016f ESI=00000000 FS=1257
EDX=43a00000 ES=016f EDI=00000001 GS=0000
Bytes bei CS:EIP:
8b 42 08 3b 45 f8 75 0a 8b 4d f4 c7 41 08 00 00 
Stapelwerte:
43a00000 0063d004 005bb094 008dfb04 114a247d 006802e4 00000000 00000000 00000000
008dfab4 00000011 0000026f 00000000 00611928 0063c864 0063c864 
----
R will be closed, but this error message is not really nice )-;  .

That's it.


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Peter Dalgaard
# 
strach.joachim@web.de writes:
A bug report on 1.3.1, one week before 1.5.0, is a bit late don't you
think?

I cannot check Windows versions right now, but pre-1.5.0 on Linux
doesn't crash. However, it does leave the terminal in noecho mode.

Basically, just don't do that for now... q() and probably others do
not expect to be invoked from a callback. I don't think there's a nice
alternative implementation of a quit button without blocking the
console. (By waiting for a window event or tcl variable change and
then executing q()).