GenericMenu.AddDisabledItem

参数

描述

向菜单添加已禁用的项。

下面的示例显示了一个带有已禁用菜单项的上下文菜单，并且该菜单项可以切换为打开和关闭状态。



另请参阅：GenericMenu.AddItem、GenericMenu.AddSeparator。

// This example shows how to create a context menu inside a custom EditorWindow,
// where the first menu item toggles whether the second menu item is enabled
// or disabled.

using UnityEngine;
using UnityEditor;

public class MyWindow : EditorWindow
{
    [MenuItem("TestContextMenu/Open Window")]
    public static void Init()
    {
        var window = GetWindow(typeof(MyWindow));
        window.position = new Rect(50, 50, 250, 60);
        window.Show();
    }

    bool item2enabled = false;
    public void Toggle()
    {
        item2enabled = !item2enabled;
        Debug.Log("item2enabled: " + item2enabled);
    }

    public void Item2Callback()
    {
        Debug.Log("Item 2 Selected");
    }

    public void OnGUI()
    {
        Event evt = Event.current;
        Rect contextRect = new Rect(10, 10, 100, 100);

        if (evt.type == EventType.ContextClick)
        {
            Vector2 mousePos = evt.mousePosition;
            if (contextRect.Contains(mousePos))
            {
                // Now create the menu, add items and show it
                GenericMenu menu = new GenericMenu();

                menu.AddItem(new GUIContent("Toggle item 2"), item2enabled, Toggle);
                if (item2enabled)
                {
                    menu.AddItem(new GUIContent("Item 2"), false, Item2Callback);
                }
                else
                {
                    menu.AddDisabledItem(new GUIContent("Item 2"));
                }

                menu.ShowAsContext();

                evt.Use();
            }
        }
    }
}