Hi Paul,
I have found the the 'graying' machanism myself since asking that
question; once I noticed that the Undo button got grayed when
there was nothing to undo, it was just a question of finding it. In
any case thanks.
Tomas
> I'm not sure I understand your question. Are you familiar with the
> following XP code?
>
> abi/src/wp/ap/xp/ap_Toolbar_ActionSet.cpp
> abi/src/wp/ap/xp/ap_Toolbar_Functions.cpp
>
> The first file lays out a table which indicates which types of changes to
> the document (AV_CHG_*) affect the state of a given toolbar item.
>
> Those changes in turn trigger logic in the second file, which set the
> toolbar item state accordingly. For example, setting EV_TIS_Gray tells
> platform code to disable the item via the EV_TIS_ShouldBeGray() macro:
>
> abi/src/af/ev/xp/ev_Toolbar_Actions.h
> abi/src/af/ev/<platform>/ev_<os>Toolbar.cpp
>
> Does that answer your question?
>
> Paul
>
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