*

Assets/Scripts/Button.cs

@@ -0,0 +1,100 @@
+using UnityEngine;
+using System.Collections;
+
+public enum ButtonState{
+	Error,
+	Locked,
+	Ready
+}
+
+
+public delegate void ButtonEventHandler();
+
+public class Button : Trigger {
+	public ButtonState state;
+	public PlayerSensor sensor;
+	private GameAction _pressAction;
+	public bool interactive = true;
+	public Predicate interactivePredicate;
+	public event ButtonEventHandler Pressed;
+	public bool locked = false;
+	public Predicate lockedPredicate;
+	public Predicate errorPredicate;
+	public bool error;
+	public string pressActionText = "Press the button";
+
+	protected virtual void OnPressed ()
+	{
+		var handler = Pressed;
+		if (handler != null)
+			handler ();
+	}
+
+	void Start () {
+		if(sensor != null){
+			sensor.PlayerEnter += HandlePlayerEnter;
+			sensor.PlayerExit += HandlePlayerExit;
+		}else{
+			Debug.LogWarningFormat("Button {0} sensor is null", name );
+		}
+
+		_pressAction = new GameAction(gameObject, pressActionText);
+	}
+
+	void HandlePlayerEnter (PlayerSensor sensor, GameObject player)
+	{
+		if(interactive){
+			ActionController.AddAction(_pressAction);
+		}
+	}
+	void HandlePlayerExit (PlayerSensor sensor, GameObject player)
+	{
+		ActionController.RemoveAction(_pressAction);
+	}
+
+	void SetInteractive(bool val){
+		if(interactive == val){
+			return;
+		}
+
+		if(val){
+			if(sensor != null && sensor.Check()){
+				ActionController.AddAction(_pressAction);
+			}
+		}else{
+			ActionController.RemoveAction(_pressAction);
+		}
+
+		interactive = val;
+	}
+
+
+
+	void OnAction(ActionArgs a){
+		if(interactive){
+			if(state == ButtonState.Ready){
+				OnPressed();
+				OnTrig();
+			}
+		}
+	}
+
+	void Update () {
+
+		if(interactivePredicate != null){
+			SetInteractive(interactivePredicate.Check());
+		}
+
+		if(errorPredicate.Check()){
+			state = ButtonState.Error;
+		}else if(lockedPredicate.Check()){
+			state = ButtonState.Locked;
+		}else{
+			state = ButtonState.Ready;
+		}
+
+
+
+
+	}
+}