Call and event when a slider is changed

[Alshain]

Hello, I'm a long time game plugin developer but I'm working on my first KSP Plugin. I'm trying to figure out the tweakables system and I've seen threads here that have explained most of it. What I'm trying to do is immediately react when a slider is changed but I'm not sure how to link a KSPField to a KSPEvent. I've seen plenty of examples of having it automatically change a variable, which would be fine if I knew the variable had been changed. Is it possible to do this? An example of what I'm trying to do would be like moving the thrust limiter while in flight, the engine immediately reacts.

[Diazo]

I'm not aware of any callback or event that is triggered when that happens so here is how I would approach it.

[KSPField]
float currentValue;

float lastValue;

public void Update()
{
if(currentValue != lastValue)
{
print("Value changed!");
lastValue = currentValue;
}
}

This is pseudo code, syntax needs checking.

Note that this method will trigger multiple times as the player moves the slider as Update() is called multiple times a second.

D.

[Alshain]

Ok, I can filter multiple updates easy enough for what I'm doing. I didn't even see the OnUpdate method there hiding at the bottom of the documentation, so that will be good to know. I'll give that a try. Thanks!

[Alshain]

Well, I got stuck again. I only wanted it to be available in EVA but I guess KSPField doesn't support that. I guess I don't have to, but it would have been better.

[Agathorn]

Maybe try using kerbal.InVessl() and if the vessel is null assume he is EVA? (I'm spitballing, I don't know if that works the way it looks like it does).

[Alshain]

Maybe try using kerbal.InVessl() and if the vessel is null assume he is EVA? (I'm spitballing, I don't know if that works the way it looks like it does).

I don't think you can do the sliders dynamically unless Squad puts it in the attribute. I could use that so that the sliders do nothing while your in the vessel, but they would still be there and I think that would just be confusing. I think it would be better to just abandon attempting to do it EVA only and hope Squad adds the capability later.