http://wixtoolset.org/issues/4512/
Technically any enabled button would allow multiple clicks between DetectBegin
and DetectComplete. The question I have, is shouldn't any installation state
info passed in DetectBegin also be passed in DetectComplete? I know in 3.x we
can't modify the signature, but to me we shouldn't be proclaiming the overall
bundle state until after detection is done.
In 3.x, either I could introduce a new state indicator,
DetectedAbsentInstalling, which would indicate the button was clicked, or a
local member variable in the installation view model that would prevent the
double invocation. Which ever pattern we favor, I think we should also apply it
to the Repair and Uninstall commands.
Even with the detected state not being "available" until DetectComplete, it's
almost as if we need a OneShotRelayCommand class to only allow a single
invocation, and if a user is able to abort out the OneShotRelay should be reset.
Thoughts?
Thanks,
Jacob
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