[R-gui] Idle/timer callbacks in tk widgets

[Stephen Eglen]

Dear `Peter, Michael, list,

Thanks for your responses.  I have now tried both suggestions (of
using the "after" command, and Sys.sleep() within a loop).  from my
preliminary expts, it seems that both methods do what I want.  The
"after" first method also seems to have the advantage of not blocking
the R prompt while the movie is playing.  

For the archives (and for others if interested) I'll send my test
script tomorrow to the list.

Best wishes, Stephen


 > I admit I am not familiar with the tcltk package, but it sounds to me that
 > you want to yield to the GUI event loop and check whether the stop button
 > has been pressed.  Calling Sys.sleep(1) in the loop will allow the button
 > handler to be called. Just have it set some flag that lets you break out of
 > the loop.