103 lines
2.1 KiB
C#
103 lines
2.1 KiB
C#
//----------------------------------------------
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// NGUI: Next-Gen UI kit
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// Copyright © 2011-2015 Tasharen Entertainment
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//----------------------------------------------
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using UnityEngine;
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/// <summary>
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/// Tween the object's alpha. Works with both UI widgets as well as renderers.
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/// </summary>
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[AddComponentMenu("NGUI/Tween/Tween Alpha")]
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public class TweenAlpha : UITweener
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{
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[Range(0f, 1f)] public float from = 1f;
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[Range(0f, 1f)] public float to = 1f;
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bool mCached = false;
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UIRect mRect;
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Material mMat;
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SpriteRenderer mSr;
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[System.Obsolete("Use 'value' instead")]
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public float alpha { get { return this.value; } set { this.value = value; } }
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void Cache ()
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{
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mCached = true;
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mRect = GetComponent<UIRect>();
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mSr = GetComponent<SpriteRenderer>();
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if (mRect == null && mSr == null)
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{
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Renderer ren = GetComponent<Renderer>();
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if (ren != null) mMat = ren.material;
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if (mMat == null) mRect = GetComponentInChildren<UIRect>();
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}
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}
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/// <summary>
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/// Tween's current value.
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/// </summary>
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public float value
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{
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get
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{
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if (!mCached) Cache();
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if (mRect != null) return mRect.alpha;
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if (mSr != null) return mSr.color.a;
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return mMat != null ? mMat.color.a : 1f;
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}
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set
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{
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if (!mCached) Cache();
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if (mRect != null)
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{
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mRect.alpha = value;
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}
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else if (mSr != null)
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{
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Color c = mSr.color;
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c.a = value;
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mSr.color = c;
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}
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else if (mMat != null)
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{
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Color c = mMat.color;
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c.a = value;
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mMat.color = c;
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}
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}
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}
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/// <summary>
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/// Tween the value.
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/// </summary>
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protected override void OnUpdate (float factor, bool isFinished) { value = Mathf.Lerp(from, to, factor); }
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/// <summary>
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/// Start the tweening operation.
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/// </summary>
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static public TweenAlpha Begin (GameObject go, float duration, float alpha)
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{
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TweenAlpha comp = UITweener.Begin<TweenAlpha>(go, duration);
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comp.from = comp.value;
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comp.to = alpha;
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if (duration <= 0f)
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{
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comp.Sample(1f, true);
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comp.enabled = false;
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}
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return comp;
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}
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public override void SetStartToCurrentValue () { from = value; }
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public override void SetEndToCurrentValue () { to = value; }
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}
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