ModelProject/Library/PackageCache/com.unity.2d.animation@5.1.1/Editor/SkinningModule/BaseTool.cs

using System;
using UnityEditor.U2D.Layout;
using UnityEngine;

namespace UnityEditor.U2D.Animation
{
    internal interface ITool {}

    internal abstract class BaseTool : SkinningObject, ITool
    {
        [SerializeField] 
        private LayoutOverlay m_LayoutOverlay;

        internal LayoutOverlay layoutOverlay
        {
            get
            {
                return m_LayoutOverlay;                
            }
        }

        [SerializeField]
        private bool m_IsActive = false;
        public bool isActive
        {
            get { return m_IsActive; }
            private set { m_IsActive = value; }
        }

        public virtual int defaultControlID { get { return 0; } }

        public virtual IMeshPreviewBehaviour previewBehaviour
        {
            get { return null; }
        }

        internal override void OnDestroy()
        {
            Deactivate();
        }

        public void Activate()
        {
            isActive = true;
            OnActivate();
        }

        public void Deactivate()
        {
            isActive = false;
            OnDeactivate();
        }

        public void DoGUI()
        {
            if (isActive)
                OnGUI();
        }

        public virtual void Initialize(LayoutOverlay layout)
        {
            m_LayoutOverlay = layout;
        }
        protected virtual void OnActivate() {}
        protected virtual void OnDeactivate() {}
        protected virtual void OnGUI() {}
    }
}