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  • $\begingroup$ I think that there is a somewhat simpler way to achieve the same: You can use as the first argument to the DynamicWrapper something like the following: Slider[Dynamic[x, (x = #; trigger = True) &], {1, 4}, ContinuousAction -> False, Appearance -> "Labeled"]. This is not only somewhat simpler, it also will work with gui elements which are not triggered by the mouse, as e.g. InputField... $\endgroup$ Commented Mar 30, 2013 at 20:42
  • $\begingroup$ @Albert Please see edit about my problems with your proposed solution. Concerning those gui elements that are not mouse-driven, one can easily modify the underlying EventHandler to handle those. $\endgroup$ Commented Mar 31, 2013 at 9:46
  • $\begingroup$ I now see that it was not enough to just post that fragment to get the correct behavior. I think the complete solution does work as you want, but I needed to add some to make the controller variable change continuously. As this is now too long for just a comment I added an extra answer... $\endgroup$ Commented Apr 2, 2013 at 10:12