The ones I've used you just pull the cable, move post, release cable. No clicking needed, in fact it would get in the way but they seem to need less than a click.
But if you're repurposing a front shifter it's going to click anyway isn't it? Unless you remove the ratchety bit.
The amount pulled was under a full click on my post, I'm guessing most don't need much.
@frankenbike started
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The ones I've used you just pull the cable, move post, release cable. No clicking needed, in fact it would get in the way but they seem to need less than a click.