package require twoAutosb
?1.0? two_autosb
pathname ?options?
two_autosb
command creates a new window which is virtually
the same as a normal Tk scrollbar
widget. The main difference is that an
two_autosb widget is only visible when it is really needed: it automatically
disappears whenever there is nothing to be scrolled.
two_autosb
thus helps
saving space within the GUI.
TwoAutoSb
).
There are cases where the auto scrollbar does not appear or disappear when it should. The basic problem with automatically hiding a scrollbar is that this action usually changes the viewable area of the scrolled widget. This might in turn change the need for a scrollbar - without any protection, the show/hide would loop forever. Unfortunately, this protection against looping sometimes prevents scrollbar visibility.