Unity3D編輯器擴展（三）——使用GUI繪制窗口

前兩篇分別講解了創建菜單https://www.cnblogs.com/xiaoyulong/p/10115053.html和創建窗口https://www.cnblogs.com/xiaoyulong/p/10120565.html

這一篇我們講解使用 GUI 來繪制我們的窗口，使窗口內容更豐富、美觀

繪制窗口我們一般會使用下面四個類：GUI、GUILayout、EditorGUI、EditorGUILayout。

這四個類大同小異，基本上沒什么差別，和我們經常使用的 UGUI 和 NGUI 相比，UGUI 和 NGUI 有圖形化的操作，而這四個類是純代碼操作。

GUI、EditorGUI 和 GUILayout、EditorGUILayout 的區別是：前者是固定布局，布局需要我們寫代碼控制，后者是自動布局。

GUI、GUILayout 和 EditorGUI、EditorGUILayout 的區別是：前者更多的用在平常調試中，后者在編輯器中使用。前者也可以使用在編輯器中。

其他的也不多說了，全是一些 API 的使用，下面我就用 EditorGUI 和 EditorGUILayout 寫個小例子，給大家看一下

代碼：

using UnityEngine;
using UnityEditor;

public class EditorGUILayoutTest : EditorWindow
{
    private Vector3 startPoint;//起點
    private Vector3 endPoint;//終點
    private float distance = 0f;//起點到終點的距離

    private bool val;
    private Color color = Color.red;

    private AnimationCurve curveX = AnimationCurve.Linear(0, 0, 1, 0);
    private AnimationCurve curveY = AnimationCurve.Linear(0, 0, 1, 1);
    private AnimationCurve curveZ = AnimationCurve.Linear(0, 0, 1, 0);

    private int sliderValue = 1;
    private bool showClose = true;
    private bool showToggleLeft = true;
    private string textfieldtest = "textfieldtest";
    private string password = "pwd123456";

    private float minVal = -10.0f;
    private float minLimit = -20.0f;
    private float maxVal = 10.0f;
    private float maxLimit = 20.0f;

    [MenuItem("MyWindow/WindowTest")]
    private static void Init()
    {
        EditorGUILayoutTest window = (EditorGUILayoutTest)EditorWindow.GetWindow(typeof(EditorGUILayoutTest));
        window.Show();
    }

    private void OnGUI()
    {
        //Vector3類型數據的顯示
        startPoint = EditorGUILayout.Vector3Field("Start Point:", startPoint);
        endPoint = EditorGUILayout.Vector3Field("End Point:", endPoint);
        //只讀的標簽
        EditorGUILayout.LabelField("Distance:", Vector3.Distance(startPoint, endPoint).ToString("f2"));
        //勾選框
        val = EditorGUILayout.Toggle("Can Jump", val);
        //是否開啟禁用功能。false表示禁用關閉，true表示開啟禁用--灰色狀態
        EditorGUI.BeginDisabledGroup(val);//
        //float類型文本Text
        EditorGUILayout.FloatField("跳躍高度：", 100.0f);
        //結束禁用
        EditorGUI.EndDisabledGroup();
        EditorGUILayout.FloatField("跳躍頻率：", 1.85f);
        //Bounds輸入框
        EditorGUILayout.BoundsField("BoundsField", new Bounds(new Vector3(50, 50, 50), new Vector3(150, 150, 150)));
        //顏色選擇框
        color = EditorGUILayout.ColorField("顏色:", color);
        //按鈕
        if (GUILayout.Button("Close"))
        {
            this.Close();
        }
        //帶有陰影的Label
        EditorGUI.DropShadowLabel(new Rect(0, 250, position.width, 20), "帶有陰影的Label");
        //動畫曲線
        curveX = EditorGUI.CurveField(new Rect(3, 320, position.width - 6, 50), "Animation on X", curveX);
        curveY = EditorGUI.CurveField(new Rect(3, 370, position.width - 6, 50), "Animation on Y", curveY);
        curveZ = EditorGUI.CurveField(new Rect(3, 420, position.width - 6, 50), "Animation on Z", curveZ);
        //數字輸入
        EditorGUI.DelayedDoubleField(new Rect(3, 480, position.width - 6, 20), "DelayedDoubleField1", 25.0);
        EditorGUI.DelayedFloatField(new Rect(3, 500, position.width - 6, 20), "DelayedFloatField", 25.0f);
        EditorGUI.DelayedIntField(new Rect(3, 520, position.width - 6, 20), "DelayedIntField", 25);
        EditorGUI.DelayedTextField(new Rect(3, 540, position.width - 6, 20), "DelayedTextField");
        //繪畫矩形
        EditorGUI.DrawRect(new Rect(3, 570, position.width - 60, 20), Color.green);
        //滑動條。輸入框(值不能滑動): 注意左邊必須要有值接收這個值，否則不能滑動
        sliderValue = EditorGUI.IntSlider(new Rect(3, 600, position.width - 60, 30), sliderValue, 0, 100);
        //幫助盒子信息框
        EditorGUI.HelpBox(new Rect(3, 645, position.width - 60, 40), "HelpBox幫助盒子", MessageType.Info);
        //Toggle 開關
        showClose = EditorGUI.Toggle(new Rect(3, 685, position.width - 60, 20), "Toggle", showClose);
        showToggleLeft = EditorGUI.ToggleLeft(new Rect(3, 710, position.width - 60, 20), "ToggleLeft", showToggleLeft);
        textfieldtest = EditorGUI.TextField(new Rect(3, 735, position.width - 60, 20), "TextField", textfieldtest);
        password = EditorGUI.PasswordField(new Rect(3, 760, position.width - 60, 20), "密碼框:", password);
        //最大值和最小值滑塊
        EditorGUI.MinMaxSlider(new Rect(3, 790, position.width - 60, 20), ref minVal, ref maxVal, minLimit, maxLimit);
    }

    private void OnInspectorUpdate()
    {
        this.Repaint();
    }
}

效果圖：