PopupWindow

彈出視窗沒有邊距，不可拖動，也無法調節大小，此外，它們還會在失去焦點時自動關閉，它們用于顯示短暫的資訊或選項，

UnityEditor.PopupWindow - Unity 腳本 APIhttps://docs.unity.cn/cn/2020.3/ScriptReference/PopupWindow.html

using UnityEngine;
using UnityEditor;

public class PopWindowExample : EditorWindow
{
    private Rect buttonRect;
    PopupExample example = new PopupExample();

    [MenuItem("Tools/PopWindowExample")]
    static void Open()
    {
        EditorWindow.GetWindow<PopWindowExample>().Show();
    }

    private void OnGUI()
    {
        GUILayout.Label("Editor window with Popup example", EditorStyles.boldLabel);       
        if (GUILayout.Button("Popup Options", GUILayout.Width(200)))
        {           
            PopupWindow.Show(buttonRect, example);            
        }
        GUILayout.Label( "Selection == " + example.Str);

        if (Event.current.type == EventType.Repaint)
        {
            buttonRect = GUILayoutUtility.GetLastRect();
        }
    }

    //繼承PopupWindowContent
    public class PopupExample : PopupWindowContent
    {
        private bool toggle1 = true;
        private bool toggle2 = true;
        private bool toggle3 = true;

        public string Str
        {
            get
            {
                string str = "";
                if (toggle1)
                {
                    str += 1;
                }
                if (toggle2)
                {
                    str += 2;
                }
                if (toggle3)
                {
                    str += 3;
                }
                return str;
            }
        }

        public override Vector2 GetWindowSize()
        {
            return new Vector2(200, 150);
        }

        //繪制
        public override void OnGUI(Rect rect)
        {
            GUILayout.Label("Popup Options Example", EditorStyles.boldLabel);
            toggle1 = EditorGUILayout.Toggle("Toggle 1", toggle1);
            toggle2 = EditorGUILayout.Toggle("Toggle 2", toggle2);
            toggle3 = EditorGUILayout.Toggle("Toggle 3", toggle3);
        }

        //打開
        public override void OnOpen()
        {
            Debug.Log("Popup opened: " + this);
        }

        //關閉
        public override void OnClose()
        {
            Debug.Log("Popup closed: " + this);
        }
    }
}

AdvancedDropdown

可搜索的下拉控制元件，

IMGUI.Controls.AdvancedDropdown - Unity 腳本 APIhttps://docs.unity.cn/cn/2020.3/ScriptReference/IMGUI.Controls.AdvancedDropdown.html

using UnityEditor;
using UnityEngine;
using UnityEditor.IMGUI.Controls;

class WeekdaysDropdown : AdvancedDropdown
{
    public string selectStr;

    public WeekdaysDropdown(AdvancedDropdownState state) : base(state)
    {
    }

    //構建子項
    protected override AdvancedDropdownItem BuildRoot()
    {
        var root = new AdvancedDropdownItem("Weekdays");

        var firstHalf = new AdvancedDropdownItem("First half");
        var secondHalf = new AdvancedDropdownItem("Second half");
        var weekend = new AdvancedDropdownItem("Weekend");

        firstHalf.AddChild(new AdvancedDropdownItem("Monday"));
        firstHalf.AddChild(new AdvancedDropdownItem("Tuesday"));
        secondHalf.AddChild(new AdvancedDropdownItem("Wednesday"));
        secondHalf.AddChild(new AdvancedDropdownItem("Thursday"));
        weekend.AddChild(new AdvancedDropdownItem("Friday"));
        weekend.AddChild(new AdvancedDropdownItem("Saturday"));
        weekend.AddChild(new AdvancedDropdownItem("Sunday"));

        root.AddChild(firstHalf);
        root.AddChild(secondHalf);
        root.AddChild(weekend);

        return root;
    }

    //選擇回呼
    protected override void ItemSelected(AdvancedDropdownItem item)
    {
        base.ItemSelected(item);
        selectStr = item.name;
    }
}

public class AdvancedDropdownTestWindow : EditorWindow
{
    WeekdaysDropdown dropdown = new WeekdaysDropdown(new AdvancedDropdownState());

    [MenuItem("Tools/AdvancedDropdownTestWindow")]
    static void Open()
    {
        EditorWindow.GetWindow<AdvancedDropdownTestWindow>().Show();
    }

    void OnGUI()
    {
        var rect = GUILayoutUtility.GetRect(new GUIContent("Show"), EditorStyles.toolbarButton);
        if (GUI.Button(rect, new GUIContent("Show"), EditorStyles.toolbarButton))
        {            
            dropdown.Show(rect);
        }
        GUILayout.Label(dropdown.selectStr);
    }
}