Peter, I quite like this idea, and I think it might be possible to do as a simple extension to the validator framework. Basically, a flag indicating that failing a certain validation would be able to be considered a warning rather than an error. Or, allow a validator to return a sentinel indicating warning vs error.

--
James Taylor, Assistant Professor, Biology/CS, Emory University

On Wed, Feb 20, 2013 at 11:08 AM, Peter Cock <p.j.a.cock@googlemail.com> wrote:

Hello all,

I was wondering if anyone else writing Galaxy tools has
wanted to be able to show warning messages conditional
on tool options?

For example, setting a parameter to a deprecated value
could trigger a warning message (with an OK/Cancel
dialogue to allow continuation or returning to the tool
options). More generally, a warning might be desirable
only if certain options are used together.

Even stricter, for some tools it would be useful to show
an error message with particular option combinations,
and refuse to submit the job.

Any thoughts?

Peter
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