0xcjy
118 lines
3.2 KiB
C#
118 lines
3.2 KiB
C#
using UnityEngine;
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using UnityEngine.EventSystems;
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/// <summary>
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/// UI按压缩小反馈
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/// </summary>
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public class UIPressScaleFeedback : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
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{
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[SerializeField, Range(0.8f, 1f)] private float pressedScale = 0.94f;
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[SerializeField, Min(0.01f)] private float scaleSpeed = 18f;
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private Transform scaleTarget;
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private Vector3 normalScale;
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private bool isPressed;
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private int releaseAfterFrame = -1;
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public static void AddTo(GameObject target)
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{
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if (!target)
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{
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return;
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}
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UmaUIContainer container = target.GetComponent<UmaUIContainer>();
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GameObject eventTarget = container && container.Button ? container.Button.gameObject : target;
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UIPressScaleFeedback feedback = eventTarget.GetComponent<UIPressScaleFeedback>();
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if (!feedback)
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{
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feedback = eventTarget.AddComponent<UIPressScaleFeedback>();
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}
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feedback.SetScaleTarget(target.transform);
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}
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private void Awake()
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{
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SetScaleTarget(scaleTarget ? scaleTarget : transform);
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}
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private void OnEnable()
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{
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if (!scaleTarget)
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{
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scaleTarget = transform;
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}
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normalScale = scaleTarget.localScale;
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isPressed = false;
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releaseAfterFrame = -1;
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}
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private void OnDisable()
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{
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if (scaleTarget)
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{
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scaleTarget.localScale = normalScale;
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}
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isPressed = false;
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releaseAfterFrame = -1;
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}
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private void Update()
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{
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if (!scaleTarget)
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{
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return;
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}
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if (releaseAfterFrame >= 0 && Time.frameCount > releaseAfterFrame)
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{
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isPressed = false;
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releaseAfterFrame = -1;
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}
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Vector3 targetScale = normalScale * (isPressed ? pressedScale : 1f);
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scaleTarget.localScale = Vector3.Lerp( scaleTarget.localScale, targetScale, 1f - Mathf.Exp(-scaleSpeed * Time.unscaledDeltaTime));
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}
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public void OnPointerDown(PointerEventData eventData)
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{
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isPressed = true;
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releaseAfterFrame = -1;
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scaleTarget.localScale = normalScale * pressedScale;
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}
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public void OnPointerUp(PointerEventData eventData)
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{
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releaseAfterFrame = Time.frameCount + 1;
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}
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public void OnPointerExit(PointerEventData eventData)
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{
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releaseAfterFrame = Time.frameCount + 1;
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}
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private void SetScaleTarget(Transform target)
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{
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scaleTarget = target;
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CenterPivotWithoutMoving(scaleTarget as RectTransform);
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normalScale = scaleTarget.localScale;
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}
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private static void CenterPivotWithoutMoving(RectTransform rectTransform)
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{
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if (!rectTransform || rectTransform.pivot == new Vector2(0.5f, 0.5f))
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{
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return;
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}
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Vector2 pivotDelta = new Vector2(0.5f, 0.5f) - rectTransform.pivot;
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Vector3 positionDelta = new Vector3( pivotDelta.x * rectTransform.rect.width * rectTransform.localScale.x, pivotDelta.y * rectTransform.rect.height * rectTransform.localScale.y, 0f);
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rectTransform.pivot = new Vector2(0.5f, 0.5f);
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rectTransform.localPosition += positionDelta;
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}
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}
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