Activate cooldown when building is finished

[Erkki2]

I'm creating superweapons (like in c&c series), which are basically buildings, which have abilities with a long range and cooldown. What I want, is that when a building is finished, the cooldown is activated immediately. One solution would be to order unit to cast the ability, but it would have to be interrupted before the effect takes place. It might also be possible to simulate this with items and start stock delay, but in that case, there are visible numbers (charges). Is there any better solution?

 

[RobertMKD]

Make a dummy spell with the same icon but does nothing and has the cooldown you want. When the unit finishes with the effect of the ability remove the original and add the dummy spell, cast it and then start a timer for the cooldown, return the original ability once it expires.

 

[Erkki2]

Thanks, that seems to be the best solution so far.

 

[IcemanBo]

If you can do that with stop order, isn't this a good one already?
For me it also would be an alternative to require some amount of mana, and use the mana regeneration as cooldown.
When building is built it would just need to start with 0 mana then. (icon gets blue, so also andicated as disabled atm. I could live with that)