88 lines
2.1 KiB
C#
88 lines
2.1 KiB
C#
namespace SRF.UI
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{
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using System;
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using Internal;
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using UnityEngine;
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using UnityEngine.UI;
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[ExecuteInEditMode]
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[RequireComponent(typeof(RectTransform))]
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[AddComponentMenu(ComponentMenuPaths.ScrollToBottom)]
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public class ScrollToBottomBehaviour : MonoBehaviour
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{
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#pragma warning disable 649
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[SerializeField]
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private ScrollRect _scrollRect;
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[SerializeField]
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private CanvasGroup _canvasGroup;
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#pragma warning restore 649
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public void Start()
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{
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if (_scrollRect == null)
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{
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Debug.LogError("[ScrollToBottomBehaviour] ScrollRect not set");
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return;
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}
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if (_canvasGroup == null)
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{
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Debug.LogError("[ScrollToBottomBehaviour] CanvasGroup not set");
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return;
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}
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_scrollRect.onValueChanged.AddListener(OnScrollRectValueChanged);
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Refresh();
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}
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void OnEnable()
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{
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Refresh();
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}
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public void Trigger()
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{
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_scrollRect.normalizedPosition = new Vector2(0, 0);
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}
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private void OnScrollRectValueChanged(Vector2 position)
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{
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Refresh();
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}
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private void Refresh()
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{
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if (_scrollRect == null)
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return;
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var position = _scrollRect.normalizedPosition;
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if (position.y < 0.001f)
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{
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SetVisible(false);
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}
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else
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{
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SetVisible(true);
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}
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}
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void SetVisible(bool truth)
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{
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if (truth)
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{
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_canvasGroup.alpha = 1f;
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_canvasGroup.interactable = true;
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_canvasGroup.blocksRaycasts = true;
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}
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else
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{
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_canvasGroup.alpha = 0f;
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_canvasGroup.interactable = false;
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_canvasGroup.blocksRaycasts = false;
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}
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}
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}
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}
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