63 lines
2.1 KiB
C#
63 lines
2.1 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.UI;
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namespace HeavenStudio.Editor
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{
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// Thank you Unity forums!
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// https://forum.unity.com/threads/scroll-view-does-not-scroll-with-mousewheel-when-mouse-is-over-a-button-inside-the-scroll-view.848848/
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public class ChiScrollRect : ScrollRect, IPointerEnterHandler, IPointerExitHandler
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{
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private static string mouseScrollWheelAxis = "Mouse ScrollWheel";
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private bool swallowMouseWheelScrolls = true;
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private bool isMouseOver = false;
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public void OnPointerEnter(PointerEventData eventData)
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{
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isMouseOver = true;
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}
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public void OnPointerExit(PointerEventData eventData)
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{
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isMouseOver = false;
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}
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private void Update()
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{
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// Detect the mouse wheel and generate a scroll. This fixes the issue where Unity will prevent our ScrollRect
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// from receiving any mouse wheel messages if the mouse is over a raycast target (such as a button).
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if (isMouseOver && IsMouseWheelRolling())
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{
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var delta = UnityEngine.Input.GetAxis(mouseScrollWheelAxis);
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PointerEventData pointerData = new PointerEventData(EventSystem.current);
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pointerData.scrollDelta = new Vector2(0f, delta * scrollSensitivity);
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swallowMouseWheelScrolls = false;
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OnScroll(pointerData);
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swallowMouseWheelScrolls = true;
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}
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}
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public override void OnScroll(PointerEventData data)
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{
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if (IsMouseWheelRolling() && swallowMouseWheelScrolls)
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{
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// Eat the scroll so that we don't get a double scroll when the mouse is over an image
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}
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else
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{
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base.OnScroll(data);
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}
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}
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private static bool IsMouseWheelRolling()
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{
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return UnityEngine.Input.GetAxis(mouseScrollWheelAxis) != 0;
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}
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}
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}
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