138 lines
2.9 KiB
C#
138 lines
2.9 KiB
C#
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//-------------------------------------------------
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// NGUI: Next-Gen UI kit
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// Copyright © 2011-2019 Tasharen Entertainment Inc
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//-------------------------------------------------
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using UnityEngine;
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/// <summary>
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/// Similar to SpringPosition, but also moves the panel's clipping. Works in local coordinates.
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/// </summary>
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[RequireComponent(typeof(UIPanel))]
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[AddComponentMenu("NGUI/Internal/Spring Panel")]
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public class SpringPanel : MonoBehaviour
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{
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static public SpringPanel current;
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/// <summary>
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/// Target position to spring the panel to.
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/// </summary>
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public Vector3 target = Vector3.zero;
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/// <summary>
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/// Strength of the spring. The higher the value, the faster the movement.
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/// </summary>
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public float strength = 10f;
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public delegate void OnFinished ();
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/// <summary>
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/// Delegate function to call when the operation finishes.
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/// </summary>
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public OnFinished onFinished;
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[System.NonSerialized] UIPanel mPanel;
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[System.NonSerialized] Transform mTrans;
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[System.NonSerialized] UIScrollView mDrag;
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[System.NonSerialized] float mDelta = 0f;
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/// <summary>
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/// Cache the transform.
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/// </summary>
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void Start ()
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{
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mPanel = GetComponent<UIPanel>();
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mDrag = GetComponent<UIScrollView>();
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mTrans = transform;
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}
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/// <summary>
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/// Advance toward the target position.
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/// </summary>
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void Update () { AdvanceTowardsPosition(); }
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/// <summary>
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/// Advance toward the target position.
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/// </summary>
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protected virtual void AdvanceTowardsPosition ()
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{
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mDelta += RealTime.deltaTime;
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var trigger = false;
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var before = mTrans.localPosition;
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var after = NGUIMath.SpringLerp(before, target, strength, mDelta);
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if ((before - target).sqrMagnitude < 0.01f)
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{
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after = target;
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enabled = false;
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trigger = true;
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mDelta = 0f;
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}
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else
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{
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after.x = Mathf.Round(after.x);
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after.y = Mathf.Round(after.y);
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after.z = Mathf.Round(after.z);
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if ((after - before).sqrMagnitude < 0.01f) return;
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else mDelta = 0f;
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}
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mTrans.localPosition = after;
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var offset = after - before;
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var cr = mPanel.clipOffset;
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cr.x -= offset.x;
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cr.y -= offset.y;
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mPanel.clipOffset = cr;
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if (mDrag != null) mDrag.UpdateScrollbars(false);
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if (trigger && onFinished != null)
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{
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current = this;
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onFinished();
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current = null;
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}
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}
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/// <summary>
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/// Start the tweening process.
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/// </summary>
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static public SpringPanel Begin (GameObject go, Vector3 pos, float strength)
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{
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var sp = go.GetComponent<SpringPanel>();
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if (sp == null) sp = go.AddComponent<SpringPanel>();
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sp.target = pos;
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sp.strength = strength;
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sp.onFinished = null;
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sp.enabled = true;
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return sp;
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}
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/// <summary>
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/// Stop the tweening process.
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/// </summary>
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static public SpringPanel Stop (GameObject go)
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{
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var sp = go.GetComponent<SpringPanel>();
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if (sp != null && sp.enabled)
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{
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if (sp.onFinished != null) sp.onFinished();
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sp.enabled = false;
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}
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return sp;
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}
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}
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