Lua API detect cleared Inputbox

Hello everyone,

currently there is no way to detect whether a switch was deleted in an inputbox.

There is a workaround when proportional is disabled:
However this does not work when proportional is enabled, since an 'empty' SwitchItem cannot be distinguished from a proportional control that is in middle position.
The best fix for this would probably be that the value of an inputbox is nil when no control is assigned.
Alternatively there could be a second boolean parameter for the callback function.

Best regards
Leon

For everyone who still has the same problem:
Apparently there is a function system.getSwitchInfo that I managed to overlook like ten times.
It works just fine:


When the callback function is expected to be called from elsewhere with value = nil, line 5 should be extended like this:

To detect if it has been deleted, you can check the "label" attribute for "??" value, I think.

label == "??" works as well, but string comparison is less efficient than just checking the boolean value, so I would recommend using

true, but it all depends on where you are using the code. If is in the configuration form, is something that you normally set and forget, so it's used once, maybe twice during the whole lifetime of the model, so is effectively "dead" code and there is no need to optimize it as much as possible. Would be different if it was within the loop, where you need to be as efficient as possible.

I take notice of your proposed use of anyway. One never knows when things get handy.

regards,