Unity的EditorWindow

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对这个比较好奇，所以来记载一下它的相关知识点和自己动手实验的过程。

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参考博客：

https://www.cnblogs.com/CaomaoUnity3d/p/4698538.html

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首先来看Unity Manual手册：https://docs.unity3d.com/ScriptReference/EditorWindow.html

Derive from this class to create an editor window.

Create your own custom editor window that can float free or be docked as a tab, just like the native windows in the Unity interface.
Editor windows are typically opened using a menu item.

using UnityEngine;
using UnityEditor;

public class MyWindow : EditorWindow
{
    string myString = "Hello World";
    bool groupEnabled;
    bool myBool = true;
    float myFloat = 1.23f;

    // Add menu named "My Window" to the Window menu
    [MenuItem("Window/My Window")]
    static void Init()
    {
        // Get existing open window or if none, make a new one:
        MyWindow window = (MyWindow)EditorWindow.GetWindow(typeof(MyWindow));
        window.Show();
    }

    void OnGUI()
    {
        GUILayout.Label("Base Settings", EditorStyles.boldLabel);
        myString = EditorGUILayout.TextField("Text Field", myString);

        groupEnabled = EditorGUILayout.BeginToggleGroup("Optional Settings", groupEnabled);
        myBool = EditorGUILayout.Toggle("Toggle", myBool);
        myFloat = EditorGUILayout.Slider("Slider", myFloat, -3, 3);
        EditorGUILayout.EndToggleGroup();
    }
}

意思就是可以通过该类创建自定义的编辑器窗口，该窗口可以可以悬浮或者固定在menu栏里，就像Unity本身自带的接口一样自然。上面的代码做实验如下：

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接下来分析一些比较重要的函数：

GetWindow是静态方法，参数分别为：

-窗口类型，一定要继承自EditorWindow

-窗口是否浮动，如果是true则浮动，false则内嵌到其他窗口，默认是内嵌

-窗口的标题，如果是空就采用类的名称来当标题

-是否聚焦，如果GetWindow创建了一个新的窗口，则一定是“聚焦”在当前窗口

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再来看一些重要的变量

首先来看focusedWindow变量

public static EditorWindow focusedWindow;

The EditorWindow which currently has keyboard focus. (Read Only)

focusedWindow can be null if no window has focus.

意思就是focusedWindow是静态变量，它的类型是EditorWindow，当我们聚焦到哪个窗口，那么这个静态变量就是哪个窗口，其实也就是记录我们聚焦的窗口。

public static void Init()
    {
        GetWindow<MyWindow>("My Window");
    }

    void OnGUI()
    {
        GUILayout.Label(EditorWindow.focusedWindow.ToString());
    }

再来看mouseOverWindow变量

public static EditorWindow mouseOverWindow;

The EditorWindow currently under the mouse cursor. (Read Only)

mouseOverWindow can be null if there is no window under the cursor.

意思就是鼠标悬停在哪个Window，这个静态变量就是那个窗口。此时我鼠标悬停在场景上

using UnityEngine;
using UnityEditor;

public class MouseOverWindowExample : EditorWindow
{
    string mouseOver = "Nothing...";

    [MenuItem("Examples/mouseOver")]
    static void Init()
    {
        GetWindow<MouseOverWindowExample>("mouseOver");
    }

    void OnGUI()
    {
        GUILayout.Label("Mouse over:\n" + mouseOver);
        if (GUILayout.Button("Close"))
        {
            this.Close();
        }

        mouseOver = EditorWindow.mouseOverWindow ?
            EditorWindow.mouseOverWindow.ToString() : "Nothing...";
    }

    void OnInspectorUpdate()
    {
        if (EditorWindow.mouseOverWindow)
        {
            EditorWindow.mouseOverWindow.Focus();
        }

        this.Repaint();
    }
}

先试验到这里，还有的那些东西，可以看着手册进行实验理解。若有碰到再来补充。