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Hi. I am having some trouble using the GTK Expander widget. I have several expanders in a vertical box. When collapsing an expander, I want the expanders below to "shuffle" up to meet the bottom of the collapsed expander's bar. However, using VBox appears to reserve a fixed amount of vertical space for each widget, which does not change when an expander is collapsed.

As a side note, I am using GTK version 2.14.7. I am using GTK through the Gtk2Hs bindings to Haskell, GHC version 6.10.3, on Windows 7.

+1  A: 

When adding the expanders to the vbox use the following snippet

boxPackStart vbox expander PackNatural 0

also make sure that when the vbox was created the homogenous flag is False.

The default packing style is PackRepel which will distribute extra space evenly between child widgets

Geoff Reedy
That worked perfectly. Much appreciated.
Vespasian