using UnityEngine;/// <summary>
/// This class makes it possible to activate or select something by pressing a key (such as space bar for example).
/// </summary>

[AddComponentMenu("Game/UI/Key Binding")]
public class UIKeyBinding : MonoBehaviour
{public enum Action{PressAndClick,Select,}public enum Modifier{None,Shift,Control,Alt,}/// <summary>/// Key that will trigger the binding./// </summary>public KeyCode keyCode = KeyCode.None;/// <summary>/// Modifier key that must be active in order for the binding to trigger./// </summary>public Modifier modifier = Modifier.None;/// <summary>/// Action to take with the specified key./// </summary>public Action action = Action.PressAndClick;bool mIgnoreUp = false;bool mIsInput = false;/// <summary>/// If we're bound to an input field, subscribe to its Submit notification./// </summary>void Start (){UIInput input = GetComponent<UIInput>();mIsInput = (input != null);if (input != null) EventDelegate.Add(input.onSubmit, OnSubmit);}/// <summary>/// Ignore the KeyUp message if the input field "ate" it./// </summary>void OnSubmit () { if (UICamera.currentKey == keyCode && IsModifierActive()) mIgnoreUp = true; }/// <summary>/// Convenience function that checks whether the required modifier key is active./// </summary>bool IsModifierActive (){if (modifier == Modifier.None) return true;if (modifier == Modifier.Alt){if (Input.GetKey(KeyCode.LeftAlt) ||Input.GetKey(KeyCode.RightAlt)) return true;}else if (modifier == Modifier.Control){if (Input.GetKey(KeyCode.LeftControl) ||Input.GetKey(KeyCode.RightControl)) return true;}else if (modifier == Modifier.Shift){if (Input.GetKey(KeyCode.LeftShift) ||Input.GetKey(KeyCode.RightShift)) return true;}return false;}/// <summary>/// Process the key binding./// </summary>void Update (){if (keyCode == KeyCode.None || !IsModifierActive()) return;if (action == Action.PressAndClick){if (UICamera.inputHasFocus) return;UICamera.currentTouch = UICamera.controller;UICamera.currentScheme = UICamera.ControlScheme.Mouse;UICamera.currentTouch.current = gameObject;if (Input.GetKeyDown(keyCode)){UICamera.Notify(gameObject, "OnPress", true);}if (Input.GetKeyUp(keyCode)){UICamera.Notify(gameObject, "OnPress", false);UICamera.Notify(gameObject, "OnClick", null);}UICamera.currentTouch.current = null;}else if (action == Action.Select){if (Input.GetKeyUp(keyCode)){if (mIsInput){if (!mIgnoreUp && !UICamera.inputHasFocus){UICamera.selectedObject = gameObject;}mIgnoreUp = false;}else{UICamera.selectedObject = gameObject;}}}}
}