ToolManager.RefreshAvailableTools

描述

调用 RefreshAvailableTools 以重建场景视图工具叠加层的内容。

当工具可以在选择和工具更改事件之外更改 EditorTool.IsAvailable 的值时，此方法很有用。

using System;
using UnityEditor;
using UnityEditor.EditorTools;
using UnityEngine;

// An example of a tool that may be made available or unavailable in situations other than selection changes.
[EditorTool("Conditional Tool", typeof(Transform))]
class ConditionallyAvailable : EditorTool
{
    bool m_IsAvailable;
    void OnEnable() => EditorApplication.update += UpdateAvailable;
    void OnDisable() => EditorApplication.update -= UpdateAvailable;

    // This tool is enabled and disabled in 10 second intervals.
    void UpdateAvailable()
    {
        var time = DateTime.Now;

        if (m_IsAvailable != ((time.Second / 10) % 2 == 0))
        {
            m_IsAvailable = !m_IsAvailable;
            // Because the tool is changing availability arbitrarily, it is necessary to manually refresh the UI.
            ToolManager.RefreshAvailableTools();
        }
    }

    // When a tool is available, it is shown in the Tools Overlay. If not available, it is hidden.
    public override bool IsAvailable() => m_IsAvailable;
}