Version: 2021.3
言語: 日本語

PropertyDrawer

class in UnityEditor

/

継承:GUIDrawer

マニュアルに切り替える

説明

カスタムプロパティードローワーの基底クラスです。作成した Serializable クラスや PropertyAttribute 変数のカスタムドローワーを作成して使用することができます。

PropertyDrawers have two uses: Customize the GUI of every instance of a Serializable class. PropertyAttribute の付いたスクリプトメンバーの GUI をカスタマイズ If you have a custom Serializable class, you can use a PropertyDrawer to control how it looks in the Inspector. Consider the Serializable class Ingredient in the script below:

using System;
using UnityEngine;

public enum IngredientUnit { Spoon, Cup, Bowl, Piece }

// Custom serializable class [Serializable] public class Ingredient { public string name; public int amount = 1; public IngredientUnit unit; }

public class Recipe : MonoBehaviour { public Ingredient potionResult; public Ingredient[] potionIngredients; }

PropertyDrawer を使用すると、Ingredient クラスの状況によってインスペクターを変更することが可能です。

PropertyDrawer は CustomPropertyDrawer 属性とドローワーを使用する Serializable クラスの型をアタッチします。

You can either use UIElements to build your custom PropertyDrawer or you can use IMGUI. To create a custom PropertyDrawer using UIElements, you have to override the PropertyDrawer.CreatePropertyGUI on the PropertyDrawer class. To create a custom PropertyDrawer using IMGUI, you have to override the PropertyDrawer.OnGUI on the PropertyDrawer class.

If the PropertyDrawer is used inside a UIElements-based inspector or EditorWindow, the UIElements implementation will be used if PropertyDrawer.CreatePropertyGUI is overwritten with a fallback on any IMGUI implementation. If the PropertyDrawer is used inside an IMGUI-based inspector or EditorWindow, only the IMGUI implementation will display. You cannot have UIElements running inside IMGUI.

Here's an example of a custom PropertyDrawer written using UIElements:

using UnityEditor;
using UnityEditor.UIElements;
using UnityEngine.UIElements;

// IngredientDrawerUIE [CustomPropertyDrawer(typeof(Ingredient))] public class IngredientDrawerUIE : PropertyDrawer { public override VisualElement CreatePropertyGUI(SerializedProperty property) { // Create property container element. var container = new VisualElement();

// Create property fields. var amountField = new PropertyField(property.FindPropertyRelative("amount")); var unitField = new PropertyField(property.FindPropertyRelative("unit")); var nameField = new PropertyField(property.FindPropertyRelative("name"), "Fancy Name");

// Add fields to the container. container.Add(amountField); container.Add(unitField); container.Add(nameField);

return container; } }

Here's an example of custom PropertyDrawer written using IMGUI. Compare the look of the Ingredient properties in the Inspector without and with a custom PropertyDrawer:


Class in the Inspector without (left) and with (right) custom PropertyDrawer.

using UnityEditor;
using UnityEngine;

// IngredientDrawer [CustomPropertyDrawer(typeof(Ingredient))] public class IngredientDrawer : PropertyDrawer { // Draw the property inside the given rect public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) { // Using BeginProperty / EndProperty on the parent property means that // prefab override logic works on the entire property. EditorGUI.BeginProperty(position, label, property);

// Draw label position = EditorGUI.PrefixLabel(position, GUIUtility.GetControlID(FocusType.Passive), label);

// Don't make child fields be indented var indent = EditorGUI.indentLevel; EditorGUI.indentLevel = 0;

// Calculate rects var amountRect = new Rect(position.x, position.y, 30, position.height); var unitRect = new Rect(position.x + 35, position.y, 50, position.height); var nameRect = new Rect(position.x + 90, position.y, position.width - 90, position.height);

// Draw fields - pass GUIContent.none to each so they are drawn without labels EditorGUI.PropertyField(amountRect, property.FindPropertyRelative("amount"), GUIContent.none); EditorGUI.PropertyField(unitRect, property.FindPropertyRelative("unit"), GUIContent.none); EditorGUI.PropertyField(nameRect, property.FindPropertyRelative("name"), GUIContent.none);

// Set indent back to what it was EditorGUI.indentLevel = indent;

EditorGUI.EndProperty(); } }

PropertyDrawer の他の使い方は PropertyAttribute の付いたメンバーの外観を変更することができます。 例えば整数で特定の範囲内で値を設定したい場合に、インスペクターにはスライダーとして表示することができます。 これは RangeAttribute としてビルドインされている PropertyAttribute 機能でこのように使用します。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { // Show this float in the Inspector as a slider between 0 and 10 [Range(0.0F, 10.0F)] public float myFloat = 0.0F; }

PropertyAttribute を作成することもできます。RangeAttribute を実装例として参考にしてください。 この属性は PropertyAttribute クラスを継承する必要があります。必要であればこの属性クラスにパラメーターや変数の値を保持しておくことができます。

// This is not an editor script. The property attribute class should be placed in a regular script file.
using UnityEngine;

public class RangeAttribute : PropertyAttribute { public float min; public float max;

public RangeAttribute(float min, float max) { this.min = min; this.max = max; } }

Now that you have the attribute, you need to make a PropertyDrawer that draws properties that have that attribute. The drawer must extend the PropertyDrawer class, and it must have a CustomPropertyDrawer attribute to tell it which attribute it's a drawer for. Here's an example using IMGUI:

// The property drawer class should be placed in an editor script, inside a folder called Editor.

// Tell the RangeDrawer that it is a drawer for properties with the RangeAttribute. using UnityEngine; using UnityEditor;

[CustomPropertyDrawer(typeof(RangeAttribute))] public class RangeDrawer : PropertyDrawer { // Draw the property inside the given rect public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) { // First get the attribute since it contains the range for the slider RangeAttribute range = attribute as RangeAttribute;

// Now draw the property as a Slider or an IntSlider based on whether it's a float or integer. if (property.propertyType == SerializedPropertyType.Float) EditorGUI.Slider(position, property, range.min, range.max, label); else if (property.propertyType == SerializedPropertyType.Integer) EditorGUI.IntSlider(position, property, Convert.ToInt32(range.min), Convert.ToInt32(range.max), label); else EditorGUI.LabelField(position, label.text, "Use Range with float or int."); } }

パフォーマンス上の理由から EditorGUILayout クラスは PropertyDrawer を使用できないことに注意してください。

関連項目: PropertyAttribute クラス、CustomPropertyDrawer クラス

変数

attributeプロパティーの PropertyAttribute を取得します(読み取り専用)
fieldInfoこのプロパティーが表すメンバーのリフレクション FieldInfo (読み取り専用)

Public 関数

CanCacheInspectorGUIOverride this method to determine whether the inspector GUI for your property can be cached.
CreatePropertyGUIOverride this method to make your own UIElements based GUI for the property.
GetPropertyHeightピクセル単位で GUI の高さを設定します そのためにはこのメソッドをオーバーライドしてください
OnGUIOverride this method to make your own IMGUI based GUI for the property.

継承メンバー