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Re: [BUG] widget-field-overlay becomes wrong

From: Lars Hansen
Subject: Re: [BUG] widget-field-overlay becomes wrong
Date: Mon, 02 Aug 2004 11:07:52 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040113

Per Abrahamsen wrote:

You cannot place an editable field next to a widget that which is
going to be deleted (with @code{widget-delete}), or whose value is
changed from with the function @code{widget-value-set}.  The
@code{menu-choice}, @code{coding-system} and @code{color} widgets call
@code{widget-value-set} when the user change their value, so these
widgets (or widgets derived from them) should never be places next to
an editing field.
Also checkbox and radio-button-choice give problems. And even if these were the only cases, it is a bad idea to place _any_ widget next to an editable field. It is not sound to create a widget for witch widget-value-set will lead to errors. Somebody else's code might call widget-value-set!

IMO the manual should not bother the reader with unnecessary technical details. Instead it should tell the reader that an editable field is not allowed to be adjacent to a neighbouring widget. That is simpler and leads to sound code.

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