Input<T>.HasChanged

[fydar]

Currently, to detect changes to an individual input, you have to subscribe to a delegate. You can also receive a callback whenever any of the inputted values change.

This API proposal adds a Boolean property to the inputs to a node that can be acted on in the OnInputChanged() callback.

Example

public class DemoNode : Node
{
    public InputSocket Target;
    public InputSocket StatIncrease;

    public INodeInstance Create()
    {
        return new DemoNodeInstance();
    }

    public class DemoNodeInstance : Instance
    {
        public Input<Character> Target;
        public Input<int> StatIncrease;

        public override InputMap[] Inputs(GraphConnector connections) = new[]
        {
            connections.Create(ref Node.Target, ref Target)
        }

        public override void Setup()
        {
            // Subscribe to events, setup variables...
        }

        public override void OnInputChanged()
        {
            if (StatIncrease.HasChanged)
            {
                Console.WriteLine($"New Stat Value: {StatIncrease.Value}.");
            }
            if (Target.HasChanged)
            {
                Console.WriteLine($"New Target Value: {Target.Value}.");
            }
        }

        public override void Remove()
        {
            // Unsubscribe from events, dispose members...
        }
    }
}

Implementation

This Boolean flag indicating whether the value of the connection has changed should live on the connection itself.

Buffering events will allow this API to be much more useful.