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32 行
776 B

using UnityEngine;
using UnityEngine.Experimental.UIElements;
using System;
namespace UnityEditor.ShaderGraph.Drawing
{
public class Scrollable : MouseManipulator
{
Action<float> m_Handler;
public Scrollable(Action<float> handler)
{
m_Handler = handler;
}
protected override void RegisterCallbacksOnTarget()
{
target.RegisterCallback<WheelEvent>(HandleMouseWheelEvent);
}
protected override void UnregisterCallbacksFromTarget()
{
target.UnregisterCallback<WheelEvent>(HandleMouseWheelEvent);
}
void HandleMouseWheelEvent(WheelEvent evt)
{
m_Handler(evt.delta.y);
evt.StopPropagation();
}
}
}