//----------------------------------------------
// NGUI: Next-Gen UI kit
// Copyright © 2011-2013 Tasharen Entertainment
//----------------------------------------------
using UnityEngine;
using AnimationOrTween;
/// <summary>
/// Simple checkbox functionality. If 'option' is enabled, checking this checkbox will uncheck all other checkboxes with the same parent.
/// </summary>
[AddComponentMenu("NGUI/Interaction/Checkbox")]
public class UICheckboxPlus : MonoBehaviour
{
static public UICheckboxPlus current;
public delegate void OnStateChange (bool state);
/// <summary>
/// Sprite that's visible when the 'isChecked' status is 'true'.
/// </summary>
public UITexture checkSprite;
/// <summary>
/// Animation to play on the checkmark sprite, if any.
/// </summary>
public Animation checkAnimation;
/// <summary>
/// If checked, tween-based transition will be instant instead.
/// </summary>
public bool instantTween = false;
/// <summary>
/// Whether the checkbox starts checked.
/// </summary>
public bool startsChecked = true;
/// <summary>
/// If the checkbox is part of a radio button group, specify the root object to use that all checkboxes are parented to.
/// </summary>
public Transform radioButtonRoot;
/// <summary>
/// Can the radio button option be 'none'?
/// </summary>
public bool optionCanBeNone = false;
/// <summary>
/// Generic event receiver that will be notified when the state changes.
/// </summary>
public GameObject eventReceiver;
/// <summary>
/// Function that will be called on the event receiver when the state changes.
/// </summary>
public string functionName = "OnActivate";
/// <summary>
/// Delegate that will be called when the checkbox's state changes. Faster than using 'eventReceiver'.
/// </summary>
public OnStateChange onStateChange;
// Prior to 1.90 'option' was used to toggle the radio button group functionality
[HideInInspector][SerializeField] bool option = false;
bool mChecked = true;
bool mStarted = false;
Transform mTrans;
/// <summary>
/// Whether the checkbox is checked.
/// </summary>
public bool isChecked
{
get { return mChecked; }
set { if (radioButtonRoot == null || value || optionCanBeNone || !mStarted) Set(value); }
}
/// <summary>
/// Legacy functionality support -- set the radio button root if the 'option' value was 'true'.
/// </summary>
void Awake ()
{
mTrans = transform;
if (checkSprite != null) checkSprite.alpha = startsChecked ? 1f : 0f;
if (option)
{
option = false;
if (radioButtonRoot == null) radioButtonRoot = mTrans.parent;
}
}
/// <summary>
/// Activate the initial state.
/// </summary>
void Start ()
{
if (eventReceiver == null) eventReceiver = gameObject;
mChecked = !startsChecked;
mStarted = true;
Set(startsChecked);
}
/// <summary>
/// Check or uncheck on click.
/// </summary>
void OnClick () { if (enabled) isChecked = !isChecked; }
/// <summary>
/// Fade out or fade in the checkmark and notify the target of OnChecked event.
/// </summary>
void Set (bool state)
{
if (!mStarted)
{
mChecked = state;
startsChecked = state;
if (checkSprite != null) checkSprite.alpha = state ? 1f : 0f;
}
else if (mChecked != state)
{
// Uncheck all other checkboxes
if (radioButtonRoot != null && state)
{
UICheckboxPlus[] cbs = radioButtonRoot.GetComponentsInChildren<UICheckboxPlus>(true);
for (int i = 0, imax = cbs.Length; i < imax; ++i)
{
UICheckboxPlus cb = cbs[i];
if (cb != this && cb.radioButtonRoot == radioButtonRoot) cb.Set(false);
}
}
// Remember the state
mChecked = state;
// Tween the color of the checkmark
if (checkSprite != null)
{
if (instantTween)
{
checkSprite.alpha = mChecked ? 1f : 0f;
}
else
{
TweenAlpha.Begin(checkSprite.gameObject, 0.15f, mChecked ? 1f : 0f);
}
}
current = this;
// Notify the delegate
if (onStateChange != null) onStateChange(mChecked);
// Send out the event notification
if (eventReceiver != null && !string.IsNullOrEmpty(functionName))
{
eventReceiver.SendMessage(functionName, mChecked, SendMessageOptions.DontRequireReceiver);
}
current = null;
// Play the checkmark animation
if (checkAnimation != null)
{
ActiveAnimation.Play(checkAnimation, state ? Direction.Forward : Direction.Reverse);
}
}
}
}
